Consulta: subjectFacets:"Light interception"
Registros recuperados: 29
Data/hora: 03/06/2024 01:25:26

Root dry matter mass and distribution of Florico grass under different grazing strategies
Provedor de dados: 86
Autores: Barros,Ana Carolina Carvalho de; Almeida,João Carlos de Carvalho; Camargo Filho,Sergio Trabali; Carvalho,Carlos Augusto Brandão de; Campana,Ludmila Lacerda; Morais,Leonardo Fiusa de.
Abstract: The objective of this work was to evaluate the variations in root dry matter mass (RDM) and the percentage distribution (PD) of the root density of Florico grass (Cynodon nlemfuensis) in the 0-40-cm soil layer, when managed under different grazing strategies. Two defoliation frequencies (90 and 95% light interception, as the criterion for allowing animals in the paddock) and two defoliation severities (post-grazing heights of 20 or 30 cm) were assessed. Four seasonal evaluations of the root system were performed between the winter of 2012 and the autumn of 2013, using the monolith and trench excavation technique, collecting 1-dm3 samples from soil surface down to a depth of 40 cm, in four sequential extracts of 10 cm each. Lower RDM values (0.69...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cynodon nlemfuensis; Forage species; Light interception; Percentage distribution; Post-grazing stubble height; Root density.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201276

Fixed versus variable rest period effects on herbage accumulation and canopy structure of grazed 'Tifton 85' and 'Jiggs' Bermuda grass
Provedor de dados: 86
Autores: Pedreira,Carlos Guilherme Silveira; Silva,Valdson José da; Guimarães,Murilo Saraiva; Pequeno,Diego Noleto Luz; Tonato,Felipe.
Abstract: The objective of this work was to evaluate the effects of variable and fixed rest periods on the forage production, plant-part composition, and canopy structural characteristics of 'Tifton 85' and 'Jiggs' Bermuda grass (Cynodon spp.) pastures under rotational stocking. The treatments were two grass cultivars (Jiggs and Tifton 85) and two rest periods (grazing starting whenever the canopy reached 25 cm or every 28 days, regardless of canopy height). A completely randomized experimental design, with a 2×2 factorial arrangement (two grass cultivars and two managements), was used with three replicates. The experiment was carried out during the summer growing season in Piracicaba, SP, Brazil. Pre- and post-grazing forage mass chacteristics were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cynodon; Canopy height; Grazing frequency; Light interception; Pasture management; Regrowth.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000100113

Silage production of corn intercropped with tropical forages in an integrated crop-livestock system with lambs
Provedor de dados: 86
Autores: Pariz,Cristiano Magalhães; Costa,Ciniro; Crusciol,Carlos Alexandre Costa; Meirelles,Paulo Roberto de Lima; Castilhos,André Michel de; Andreotti,Marcelo; Costa,Nídia Raquel; Martello,Jorge Martinelli.
Abstract: The objective of this work was to evaluate the effect of intercropping systems between corn and tropical forages, at different cutting heights, on silage production, light interception, land use efficiency, intercropping competition factors, and pasture production. In the 2010/2011 and 2011/2012 crop seasons, two cultivation modalities were evaluated in the summer/autumn - monocropped corn with residual regrowth of signal grass (Urochloa decumbens) from the soil seed bank and corn intercropped with palisade grass (U. brizantha 'Marandu') -, in a factorial arrangement with two cutting heights for silage production - 0.20 and 0.45 m. After corn silage harvest, the forages were grazed by lambs in a semi-feedlot system, in the winter/spring....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Urochloa; Zea mays; Cutting height; Land equivalent ratio; Light interception.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017000100054

Leaf angle and light interception in sunflower (Helianthus annuus L.). Role of the petiole's mechanical and anatomical properties
Provedor de dados: 85
Autores: Hernández,LF.
The relationships between (1) leaf biomass and morphology (lamina area and petiole and lamina inclination), (2) petiole's mechanical and structural properties, and (3) the vertical light gradient inside the crop's canopy were studied in field grown sunflower (Helianthus annuus L.) plants, maintained at optimum soil water and mineral levels. At flowering, incident photosynthetic active radiation (PAR) was measured at the top of the canopy and on individual leaves using a quantum sensor. The fraction of direct incident radiation which passed through the canopy reaching each individual leaf was then calculated. Individual petiole and lamina inclination angles (iaPetiole and iaLamina, respectively) were measured from sequential digital images. These were taken...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biomechanics; Helianthus; Leaf angle; Light interception; Sunflower.
Ano: 2010
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572010000200001

Advances in apple culture worldwide
Provedor de dados: 94
Autores: Robinson,Terence.
Over the last 60 years, planting densities for apple have increased as improved management systems have been developed. Dwarfing rootstocks have been the key to the dramatic changes in tree size, spacing and early production. The Malling series of dwarfing rootstocks (M.9 and M.26) have been the most important dwarfing rootstocks in the world but are poorly adapted in some areas of the world and they are susceptible to the bacterial disease fire blight and the soil disease complex, apple replant disease which limits their uses in some areas. Rootstock breeding programs in several parts of the world are developing improved rootstocks with resistance to fire blight, and replant disease, and improved cold hardiness and yield efficiency. A second important...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Planting system; Tree density; Tree shape; Rootstock; Light interception; Light distribution; Feathered trees; Tree training; Limb angle; Pruning; Profitability; Genome mapping.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452011000500006

Morphogenesis of Tanzania guinea grass under nitrogen doses and plant densities
Provedor de dados: 96
Autores: Braz,Thiago Gomes dos Santos; Fonseca,Dilermando Miranda da; Freitas,Fabrício Paiva de; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino; Santos,Márcia Vitória; Pereira,Vinícius Valim.
The objective of this work was to evaluate effects of nitrogen fertilization and plant density on morphogenesis of Tanzania guinea grass. It was used a random block design with 12 treatments and two replications in a 4 × 3 factorial arrangement, with four doses of nitrogen (N) (without N application, 80, 160 or 320 kg/ha.year) and three plant densities (9, 25 or 49 plants/m²). Harvest was performed at 25 cm from the ground when the canopy intercepted 95% of the incident light. Rates of leaf appearance and pseudostem elongation were positively and linearly influenced by nitrogen, whereas phillochron and leaf life span were influenced linearly and negatively. Leaf elongation responded positively to two factors, whereas leaf senescence rate and number of live...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization; Light interception; Morphogenetic characteristics; Structural characteristics; Panicum maximum.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700004

Forage yield and nutritive value of Tanzania grass under nitrogen supplies and plant densities
Provedor de dados: 96
Autores: Freitas,Fabrício Paiva de; Fonseca,Dilermando Miranda da; Braz,Thiago Gomes dos Santos; Martuscello,Janaina Azevedo; Santos,Manoel Eduardo Rozalino.
The objective of this experiment was to evaluate the nitrogen and plant density influence on the yield, forage dissection and nutritive value of Tanzania grass (Panicum maximum Jacq.). The design was of completely randomized blocks with three replications in a factorial arrangement with four nitrogen levels (0, 80, 160 or 320 kg/ha N) and three plant densities (9, 25 or 49 plants/m²). The plots were cut at 25 cm from soil level when the canopy reached 95% of light interception. The total dry matter forage yield and dry matter forage yield per harvest increased linearly with the nitrogen fertilization. The leaf and stem yield had the same response. The senesced forage yield was quadratically influenced by the nitrogen. The stems ratio in the morphologic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Fertilization; Forage dissection; Intermittent stocking; Light interception; Panicum maximum; Pasture management.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400006

Structural characteristics and forage mass of Tifton 85 pastures managed under three post-grazing residual leaf areas
Provedor de dados: 96
Autores: Silva,Wilton Ladeira da; Galzerano,Leandro; Reis,Ricardo Andrade; Ruggieri,Ana Cláudia.
The experiment was carried out on Cynodon spp cv. Tifton 85 pastures grazed by sheep under rotational stocking, with the objective of evaluating the structural characteristics as well as the forage mass of the pastures subjected to three grazing intensities in successive cycles. Treatments were composed of three residual leaf area indices (rLAI; 2.4; 1.6 and 0.8), allocated in completely randomized blocks with seven replications, totaling 21 experimental units. Tiller population density, pasture height, leaf area index, forage morphological composition and pasture forage mass were evaluated. The rLAI modified the tiller population density, which increased linearly with decrease in the rLAI of the pastures. Dry masses of leaf blade, stem and dead material...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf area index; Light interception; Sheep; Rotational stocking; Tillers.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000400002

Morphogenesis in guinea grass pastures under rotational grazing strategies
Provedor de dados: 96
Autores: Montagner,Denise Baptaglin; Nascimento Júnior,Domicio do; Sousa,Braulio Maia de Lana; Vilela,Hélio Henrique; Silveira,Márcia Cristina Teixeira da; Euclides,Valéria Pacheco Batista; Silva,Sila Carneiro da; Carloto,Marciele Neves.
This study was conducted in order to evaluate the morphogenetic and structural characteristics of guinea grass cv. Mombasa under three post-grazing heights (intense - 30 cm, lenient - 50 cm and variable - 50 in spring-summer and 30 cm in autumn-winter) when sward light interception reached 95% during regrowth. Post-grazing heights were allocated to experimental units (0.25 ha) in a completely randomized block design with three replications. Post-grazing heights affected only leaf elongation rate and the number of live leaves. Pastures managed with variable post-grazing height showed higher leaf elongation rate in the summer of 2007. This management strategy also resulted in a higher number of live leaves. During the spring of 2006, plants showed lower leaf...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecophysiology; Grazing management; Light interception; Panicum maximum cv. Mombasa; Post-grazing height.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400008

Morphogenetic and structural characteristics of tillers of guinea grass of different age and grazing severities
Provedor de dados: 96
Autores: Montagner,Denise Baptaglin; Nascimento Júnior,Domicio do; Sousa,Braulio Maia de Lana; Vilela,Hélio Henrique; Euclides,Valéria Pacheco Batista; Silva,Sila Carneiro da; Sbrissia,André Fischer; Carloto,Marciele Neves.
The objective of this research was to evaluate the effects of tiller age on morphogenic and structural characteristics of guinea grass cv. Mombaca subjected to intermittent stocking and three stubble heights: 30 cm, 50 cm and 50-30 cm. Stubble heights were assigned to experimental units in a completely randomized block design with three replicates. Grazing was performed when canopy intercepted 95% of light incidence. Leaf appearance rate, leaf elongation rate and number of live leaves per tiller were higher in the summer when compared with the winter. Contrarily, stem elongation rate, phyllochron and leaf lifespan were lower in the summer when compared with the winter. During the summer, young tillers had higher leaf appearance and elongation rates when...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ecophysiology; Light interception; Panicum maximum; Stubble height.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011001000006

Dynamics of production and forage utilization on elephant grass pastures managed with different post-grazing heights
Provedor de dados: 96
Autores: Sousa,Braulio Maia de Lana; Nascimento Júnior,Domicio do; Monteiro,Hélida Christhine de Freitas; Fonseca,Dilermando Miranda da.
This study was conducted to evaluate the daily production of forage and its morphological components, as well as the potential of forage utilization in pastures of Pennisetum purpureum cv. Napier managed with three post-grazing heights (30, 50 and 70 cm). Two experiments were carried out: one from February to May 2009 and another from December 2009 to May 2010, characterizing months of summer and fall. The experimental design was of completely randomized blocks with three replicates. The grazing was performed by crossbred heifers of approximately 270 kg body weight, when the sward intercepted 95% of the incoming light. In both experiments, the pastures managed with post-grazing height of 30 cm, in the summer months (December to March), presented lower...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Light interception; Pasture management; Pasture structure; Pennisetum purpureum.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000800006

Biomass accumulation in mombasa guineagrass plants under different levels of nitrogen supply and plant densities
Provedor de dados: 96
Autores: Pereira,Vinícius Valim; Fonseca,Dilermando Miranda da; Martuscello,Janaina Azevedo; Cecon,Paulo Roberto; Santos,Márcia Vitória; Braz,Thiago Gomes dos Santos.
The objective of this study was to evaluate the effect of different levels of nitrogen supply and plants densities in the productivity of mombasa guineagrass (Panicum maximum) in the period of establishment. The design was of completely randomized blocks, with 12 treatments and three repetitions, with four nitrogen supplies (absence of application, 80, 160 and 320 kg/ha.year) and three plant densities (9, 25 and 49 plants/m²). The plot was cut at 30 cm from the ground when the sward high intercepted 95% of light. The following items were evaluated: sward height at 95% light interception, interval and number of cuts, dry mass production, total dry mass of leaves, stems and dead material and the morphologic composition. Nitrogen increased the dry mass...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Height; Light interception; Productivity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000500006

Morphogenetic and structural characteristics of guinea grass tillers at different ages under intermittent stocking
Provedor de dados: 96
Autores: Barbosa,Rodrigo Amorim; Nascimento Júnior,Domicio do; Vilela,Hélio Henrique; Sousa,Braulio Maia de Lana; Silva,Sila Carneiro da; Euclides,Valéria Pacheco Batista; Silveira,Márcia Cristina Teixeira da.
The objective of this research was to assess morphogenetic and structural characteristics of tillers of guinea grass cv. Tanzania at different ages. The pastures of guinea grass were managed in six pasture conditions related to the combination of three frequencies (90, 95, and 99% light interception) and two post-grazing heights (25 and 50 cm). In these six pastures conditions, three tiller ages were evaluated (young, mature, and old). The design was of completely randomized block with three replications. Young tillers exhibited higher leaf appearance rate and leaf elongation rate and, consequently, higher final leaf length and number of live leaves than mature and old tillers, regardless of the pasture condition. On pastures managed with 90 or 95% light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Light interception; Panicum maximum; Sward height.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700005

Dynamics of forage accumulation in Elephant grass subjected to rotational grazing intensities
Provedor de dados: 96
Autores: Sousa,Braulio Maia de Lana; Nascimento Júnior,Domicio do; Monteiro,Hélida Christhine de Freitas; Silva,Sila Carneiro da; Vilela,Hélio Henrique; Silveira,Márcia Cristina Teixeira da; Rodrigues,Carlindo Santos; Sbrissia,André Fischer.
We assessed the accumulation dynamics of forage and its components in Elephant grass cv. Napier (Pennisetum purpureum Schum.) that were subjected to three post-grazing height treatments (30, 50, and 70 cm) from February through May 2009 (experiment one) and December 2009 through May 2010 (experiment two). In experiment one, the grazing events started when the light interception by the canopy reached 95%. The same was adopted for experiment two, except for the first grazing event, which was based on the height of the apical meristems of basal tillers. The experimental design for both experiments was a randomized complete block with three replications. The pastures that were managed at a post-grazing height of 30 cm exhibited lower rates of leaf and stem...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Growth; Light interception; Pennisetum purpureum; Senescence; Tiller categories.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000900004

Frequencies and intensities of defoliation in Aruana Guineagrass swards: accumulation and morphological composition of forage
Provedor de dados: 96
Autores: Zanini,Guilherme Doneda; Santos,Gabriela Trevisan; Sbrissia,André Fischer.
The objective of this study was to assess the accumulation and morphological composition of forage in Aruana Guineagrass (Panicum maximum cv. Aruana) swards subjected to intermittent stocking with sheep. Experimental treatments when grazing was introduced included low (95%) and high (98%) incident light interception and low (10 cm)- and high (15 cm)-residue height and were allocated to experimental units (196 m² fenced areas) in a completely randomized 2 × 2 factorial arrangement with three replicates. Treatments were imposed between January and May 2009. More frequent grazing cycles (95% light interception) resulted in better control of stem elongation, lower proportion of dead plant material and invasive plants, and higher proportions of leaf blades in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Light interception; Panicum maximum; Post-grazing height.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000400011

Forage mass and structure of piatã grass deferred at different heights and variable periods
Provedor de dados: 96
Autores: Vilela,Hélio Henrique; Sousa,Braulio Maia de Lana; Santos,Manoel Eduardo Rozalino; Santos,Andreza Luzia; Assis,Camila Zimmer de; Rocha,Gabriel de Oliveira; Faria,Bruno Damaceno; Nascimento Júnior,Domicio do.
The objective of this study was to determine the deferment period and the most adequate initial sward height of Brachiaria brizantha cv. Piatã for deferment in the region of Viçosa, Minas Gerais. For so, the following characteristics were evaluated: masses and bulk density of forage and its morphological components, light interception by the sward, leaf area index, leaf angle, sward and extended tiller height and falling index of the deferred piatã grass. The three deferment periods assessed (65, 85 and 105 days) were randomized to the plots and the three sward heights (20, 30 and 40 cm), randomized in the subplots. The experimental design was of completely randomized blocks, with three replicates, in a subdivided plots arrangement. Masses of forage, green...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Forage bulk density; Leaf area index; Light interception; Pasture management.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000700010

Morphogenetic and structural characteristics of andropogon grass submitted to different cutting heights
Provedor de dados: 96
Autores: Sousa,Braulio Maia de Lana; Nascimento Júnior,Domicio do; Silva,Sila Carneiro da; Monteiro,Hélida Christhine de Freitas; Rodrigues,Carlindo Santos; Fonseca,Dilermando Miranda da; Silveira,Márcia Cristina Teixeira da; Sbrissia,André Fischer.
This work was performed aiming to evaluate the morphogenetic and structural characteristics of Andropogon gayanus cv. Planaltina species submitted to three cutting heights (20, 27 and 34 cm). The three cutting heights were allocated in experimental units (12 m²) in a complete randomized block design with three replications. The cuts were done when the light interception by the sward reached 95%. At this moment, the sward height revealed itself constant with values close to 50 cm. The lowest cutting height (20 cm) influenced negatively the final leaf blade length, the number of live leaves, the leaf lifespan, the stem elongation rate and the tiller population density, and it influenced positively the phyllochron and the leaf senescence rate. Probably, cuts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Andropogon gayanus; Ecophysiology; Light interception; Morphogenesis; Sward height.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982010001000006

Morphogenetic and structural characteristics of xaraes palisadegrass submitted to cutting heights
Provedor de dados: 96
Autores: Sousa,Braulio Maia de Lana; Nascimento Júnior,Domicio do; Rodrigues,Carlindo Santos; Monteiro,Hélida Christhine de Freitas; Silva,Sila Carneiro da; Fonseca,Dilermando Miranda da; Sbrissia,André Fischer.
The objective of this work was to evaluate the morphogenetic and structural characteristics of xaraes palisadegrass submitted to three cutting heights (15, 20 and 25 cm) when the sward reached 95% of light interception during regrowth. The experiment was carried out according to a complete randomized block design with three replications. The sward surface height under the cutting condition of 95% of light interception was very homogeneous with values around 30 cm. The increase in cutting height reduced the leaf elongation rate and the number of live leaves but increased stem elongation rate. As the cutting criterion was the same, before the intense competition for light, the variation in the cutting severity had a small influence on the morphogenetic and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria brizantha; Ecophysiology; Grazing management; Light interception; Morphogenesis; Sward height.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000100008

Morphogenic and structural characteristics of guinea grass pastures submitted to three frequencies and two defoliation severities
Provedor de dados: 96
Autores: Barbosa,Rodrigo Amorim; Nascimento Júnior,Domicio do; Vilela,Hélio Henrique; Silva,Sila Carneiro da; Euclides,Valéria Pacheco Batista; Sbrissia,André Fischer; Sousa,Braulio Maia de Lana.
It was evaluated the morphogenic and structural characteristics of guinea grass under rotational at three grazing intervals and two defoliation intensities. Grazing intervals corresponded to the time needed by the forage canopy to reach 90, 95 or 100% of incident light interception during regrowth and they were evaluated combined to two defoliation severities (post-grazing conditions, 25 and 50 cm of height), being allocated to experimental units according to a complete randomized design, with three replicates and 3 × 2 factorial arrangement. The experiment was conducted from July 2003 to May 2004. For evaluation of morphogenetic and structural characteristics, ten tillers per experimental unit were selected. Morphogenetic and structural characteristics...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Canopy height; Grazing management; Light interception; Panicum maximum.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000500002

Morphogenesis of dwarf elephant grass clones in response to intensity and frequency of defoliation in dry and rainy seasons
Provedor de dados: 96
Autores: Gomide,Carlos Augusto de Miranda; Paciullo,Domingos Sávio Campos; Costa,Igor de Almeida; Lima,Aline Medeiros; Castro,Carlos Renato Tavares de; Lédo,Francisco José da Silva.
The aim of this study was to evaluate during the dry and rainy seasons the morphogenesis traits of two clones of dwarf elephant grass under different management strategies. The study was conducted in a factorial 2 × 2 × 3 design, using two clones, one green and one purple, two residual heights, 25 and 45 cm, and three frequencies of defoliation according to the light interception of 90, 95 and 100%. The design was a randomized block with three replications. The variables were leaf elongation and leaf senescence rate, stem elongation rate and phyllochron. The leaf lifespan and the number of living leaves per tiller were also estimated. The clones presented low stem elongation rates, showing adaptation for grazing use. In the rainy season, the light...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf elongation; Leaf senescence; Light interception; Pennisetum purpureum; Phyllochron; Stem elongation.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982011000700007

Tillering dynamics in pastures of guinea grass subjected to grazing severities under intermittent stocking
Provedor de dados: 96
Autores: Montagner,Denise Baptaglin; Nascimento Júnior,Domicio do; Vilela,Hélio Henrique; Sousa,Braulio Maia de Lana; Euclides,Valéria Pacheco Batista; Silva,Sila Carneiro da; Carloto,Marciele Neves.
This experiment was carried out to analyze the tillering dynamics of the species Panicum maximum cv. Mombaca subjected to three post-grazing heights: residue of 30 cm (30); residue of 50 cm (50); and residue of 50 cm during spring and summer, lowered to 40 cm in the first fall season grazing and to 30 cm in the following grazing cycle, resuming to 50 cm after the first grazing of the following spring season (50-30). Grazings were initiated whenever the swards intercepted 95% of the incident light. The post-grazing heights were allocated in the experimental units in a completely randomized block design with three replications. The density of basal tillers did not vary between the residual heights evaluated. Swards managed with variable residual height...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Light interception; Panicum maximum; Stability index; Tiller.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982012000300010

Sward structural characteristics and herbage accumulation of Panicum maximum cv. Mombaça subjected to rotational stocking managements
Provedor de dados: 63
Autores: Silva,Sila Carneiro da; Bueno,Adriana Amaral de Oliveira; Carnevalli,Roberta Aparecida; Uebele,Marina Castro; Bueno,Fernando Oliveira; Hodgson,John; Matthew,Cory; Arnold,Greg C.; Morais,Jozivaldo Prudêncio Gomes de.
Grazing strategies promote changes in sward structure that can affect patterns of herbage accumulation and sward flexibility to management. This experiment evaluated sward structural characteristics and herbage accumulation of Mombaça guinea grass (Panicum maximum Jacq. cv. Mombaça) subjected to rotational stocking managements. Treatments involved grazing when swards reached either 95 or 100% interception of the incident light (LI), to post-grazing heights of 30 and 50 cm, and were allocated to 2,000 m² paddocks according to a randomised complete block design in a 2 × 2 factorial arrangement with four replications, from January 2001 to February 2002. Sward canopy changed from a vertical to a more horizontal orientation as the light interception area index...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing management; Leaf canopy height; Leaf area index; Light interception.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162009000100002

Sward structure and herbage yield of rotationally stocked pastures of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] as affected by herbage allowance
Provedor de dados: 63
Autores: Braga,Gustavo José; Pedreira,Carlos Guilherme Silveira; Herling,Valdo Rodrigues; Luz,Pedro Henrique de Cerqueira; Lima,César Gonçalves de.
In ruminant-forage systems herbage allowance (HAL) has a major impact on grazing intensity and sward structure, affecting animals, plants, and ultimately, pasture yield. Data on HAL responses of tropical cultivated pastures are scarce and this information may be useful in optimizing pasture utilization. The objective of this study was to describe and contrast sward structure and herbage accumulation responses of 'Marandu' palisadegrass [Brachiaria brizantha (A.Rich.) Stapf] pastures to HAL during two grazing seasons (warm-rainy season of 2003 and 2004). Treatments were four daily HAL levels, 5, 10, 15 and 20 kg herbage mass per 100 kg live weight (%) in a rotational stocking system with 35 days of grazing cycle (28-day rest; 7-d grazing). Post-graze swards...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Herbage accumulation; Sward height; Light interception; Forage mass.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000200003

Herbage accumulation and grazing losses on Mulato grass subjected to strategies of rotational stocking management
Provedor de dados: 63
Autores: Silveira,Márcia Cristina Teixeira da; Silva,Sila Carneiro Da; Souza Júnior,Salim Jacaúna de; Barbero,Leandro Martins; Rodrigues,Carlindo Santos; Limão,Veridiana Aparecida; Pena,Karine da Silva; Nascimento Júnior,Domicio do.
Grazing management strategies affect not only herbage accumulation but also the efficiency of grazing. This study aimed to evaluate herbage accumulation (leaf, stem and dead material), grazing efficiency and losses of mulato grass (a Brachiaria ruziziensis × Brachiaria brizantha cv. Marandu hybrid) subjected to strategies of rotational stocking management. Treatments consisted of combinations between two post-grazing heights (15 and 20 cm) and two pre-grazing conditions (95 % and maximum canopy light interception (LI)) assigned to experimental units (1200-m² paddocks) according to a 2 × 2 factorial arrangement and a randomized complete block design, with four replications. The experiment was carried out from Jan 2008 to Mar 2009. Season of the year...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Brachiaria spp.; Grazing efficiency; Light interception; Grazing management.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162013000400004

Influence of high planting densities and arrangements on yield and fruit development of Musa AAA Simmonds
Provedor de dados: 109
Autores: Barrera-Violet,José Luis; Cartagena-Valenzuela,José Régulo; Nanclares-Gómez,Omar Alonso.
Abstract Banana is one of the most abundantly consumed fruits in the world for its contribution to human nutrition, including an important content of potassium. Given the social contribution of this crop in the cropping areas of Colombia, it is necessary to develop agronomic management strategies that contribute to increasing productivity and offering alternatives that regulate the effects of climate seasonality on banana production in the Uraba region of Colombia. For this purpose, different planting densities (2,000, 2,500, 3,000 and 3,500 plants ha-1) and planting arrangements (triangle, rectangle and double furrow), plus a relative control (1,700 plants ha-1 under triangle arrangement), were evaluated in the banana cv. Williams. The experimental design...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Banana; Light interception; Plant competition; Plant population; Bunch quality.
Ano: 2020
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122020000100046

Dry matter intake and milk yield of cows grazing Xaraés palisadegrass under different management strategies
Provedor de dados: 2
Autores: Carvalho, Vinícius Emanoel; Araújo, Saulo Alberto do Carmo; Alves, Danilo de Oliveira; Santos, Carlos César dos; Rocha, Norberto Silva.
This study aimed to evaluate the intake and milk yield of crossbred cows (Holstein x Zebu), under two management strategies, based on 95% light interception and fixed days. Eight lactating cows with body weight of 466 kg (± 35 kg) and lactation stage of 137 days (± 107 days) were used, four animals were assigned to each treatment. Dry matter intake was estimated indirectly, using neutral detergent insoluble fiber as internal indicator and chromium oxide as external indicator. This was a completely randomized design, with four replications, two grazing strategies and three days of occupation. The animals under light management showed dry matter intake on the first day (11.42 kg) similar to the second day (9.57 kg), and this was similar to the third day...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Produção Animal; Forragicultura animal production; Dairy cattle; Grazing strategies; Light interception; Milk production; Occupation period.
Ano: 2019
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/46843

Estrutura do capim-braquiária em relação à planta daninha - doi: 10.4025/actascianimsci.v33i3.10439
Provedor de dados: 2
Autores: Santos, Manoel Eduardo Rozalino; Universidade Federal de Viçosa; Fonseca, Dilermando Miranda da; Universidade Federal de Viçosa; Gomes, Virgilio Mesquita; Universidade Federal de Viçosa; Pimentel, Roberson Machado; Universidade Federal de Lavras; Silva, Guilherme Portes; Universidade Federal de Viçosa; Albino, Ronan Lopes; Universidade Federal de Viçosa.
O objetivo foi avaliar as características estruturais da Brachiaria decumbens cv. Basilisk em relação à planta daninha Solanum sisymbrifolium no pasto. Os tratamentos foram dois locais no mesmo pasto, quais sejam, próximo e distante da planta daninha. O delineamento foi em blocos ao acaso com três repetições. O pasto foi manejado sob lotação contínua, com bovinos e com altura média de aproximadamente 25 cm. Foram quantificadas as densidades populacionais das categorias de tamanho dos perfilhos, a altura, a interceptação de luz, as massas e as densidades volumétricas dos componentes morfológicos do pasto. No local distante da planta daninha houve maior ocorrência de perfilhos com tamanho inferior a 20 cm. Já no local próximo da planta daninha, predominaram...
Tipo: Pesquisa Científica
Palavras-chave: 5.04.04.00-8 densidade volumétrica de forragem; Interceptação de luz; Lotação contínua; Massa de forragem; Solanum sisymbrifolium forage bulk density; Light interception; Continuous stocking; Forage yield; Solanum sisymbrifolium.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/10439

Grazing criteria for perennial peanut (Arachis pintoi cv. Amarillo) consumed by sheep in rotational stocking
Provedor de dados: 45
Autores: Kröning,A.B.; Costa,O.A.D.; Farias,P.P.; Martins,L.A.; Ott,O.G.; Macari,S.; Ferreira,O.G.L.
ABSTRACT The objective of work was to study the productive profile of perennial peanut in a rotational stocking environment under different criteria. The treatments corresponded to pre-grazing height of 14 and 18cm or 95% of light interception (LI) distributed in a completely randomized design. The studied variables were forage mass, percentage of structural components, forage mass and the structural components in the lower and upper canopy strata. The entrance criterion of 18cm in height, despite having higher forage mass, presented lower percentage of leaves and higher percentage of stems and forage losses. The criteria of 14cm and 95% light interception presented similar production between them and the highest rate of forage accumulation. In all...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Forage mass; Light interception; Lower stratum; Upper stratum.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352019000300997

A grazing height target to minimize tiller stem elongation rate in annual ryegrass swards
Provedor de dados: 65
Autores: Santos,Gabriela Trevisan; Zanini,Guilherme Doneda; Padilha,Deisy Andrade; Sbrissia,André Fischer.
ABSTRACT: Italian ryegrass (Lolium multiflorum Lam) is one of the most cultivated temperate annual forage crop around the world. Despite that, there is little information about the process of stem elongation during its vegetative growth. This information would be useful for grazing management purposes. Thus, the aim of this study was to assess the herbage accumulation and stem elongation rates in annual ryegrass pastures submitted to intermittent stocking. The experimental design used was a completely randomized 2x2 factorial with three replications. The treatments were defined by the combination of two pre-grazing heights (15 and 25cm) associated with two post-grazing heights (4 and 8cm). The herbage accumulation rates were higher in pastures with 25cm...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grazing flexibility; Grazing management; Sward height; Light interception; Lolium multiflorum.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782016000100169