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| Registros recuperados: 20 | |
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| López-Rodríguez,Nathalia C.; Barros,Cíntia M. de; Petry,Ana Cristina. |
| ABSTRACT This study proposes eight stages according to the main discernible changes recorded throughout the embryonic development of Jenynsia multidentata. The development of morphological embryo structures, pigmentation, and changes in tissues connecting mother and embryo were included in the stage characterization. From the fertilized egg (Stage 1), an embryo reaches the intermediary stages when presenting yolk syncytial layer (Stage 2), initial pigmentation of the outer layers of the retina and dorsal region of the head (Stage 3), and the sprouting of the caudal (Stage 4), dorsal and anal fins (Stage 5). During the later stages, the ovarian folds enter the gills, and the body pigmentation becomes more intense (Stage 6), the body becomes elongated (Stage... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Developmental stages; Dry weight; Matrotrophy; Morphology; Viviparity. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1679-62252017000400206 |
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| Dahroug,Zaryf; Santana,Natália Fernanda; Pagioro,Thomaz Aurélio. |
| Abstract Organic decomposition is a complex interaction between chemical, physical and biological processes, where the variety of aquatic vascular plants is essential for the trophic dynamics of freshwater ecosystems. The goal of this study was to determine the aquatic macrophyte Eichhornia azurea (Sw.) Kunth decomposition rate, the time relation with the limnological parameters, and whether this relationship is a result of decomposition processes. To that end, we collected water and leaves of E. azurea in Surf Leopoldo, PR. The experiment consisted of two treatments: 25 containers with 450 mL of water and 0.8 g of biomass dry weight were used with or without the addition of macrophytes. Samples were collected in triplicate at times 0, 3 h, 6 h, 12 h, 24... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Decomposition rate; Dry weight; Aquatic macrophyte; COD. |
| Ano: 2016 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200279 |
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| LIMA, P. C. F.; OLIVEIRA, E. B. de; MACHADO, S. do A.. |
| Foram obtidas equacoes para estimativa da biomassa de madeira e de parte aerea das especies Prosopis alba Grisebach, P.chilensis (Molina) Stuntz emend. Burkart, P. glandulosa Torrey, P.juliflora (SW) DC, P.pallida (Humboldt and Bonpland ex Willdenov) H.B.K. e P.velutina Wooton. Estas especies foram cultivadas no semi-arido brasileiro e cortadas aos 106 meses de idade. As variaveis testadas, sob diferentes formas e combinacoes, foram altura total, diametro da copa e da base das arvores (0,10 m), e calculados os diametros quadraticos para as alturas de 0,30 m e 1,30 m. Para todas as especies, foram recomendadas equacoes baseadas no modelo y = b1d2 onde y e a biomassa da madeira ou biomassa total da parte aerea e d e o diametro quadratico a 0,30 m. Para as... |
| Tipo: Artigo de periódico |
Palavras-chave: Peso seco; Regiao semi-arida; Species; Dry weight; Semi-arid region; Algaroba; Biomassa; Espécie; Estatística; Prosopis; Biomass; Brazil. |
| Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/132449 |
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| LIMA, P. C. F.; OLIVEIRA, E. B. de; MACHADO, S. do A.. |
| Foram obtidas equações para estimativa da biomassa de madeira e da parte aérea das espécies Prosopis alba Grisebach, P. chilensis (Molina) Stuntz emend. Burkart, P. glandulosa Torrey, P. juliflora (SW) DC, P. pallida (Humboldt and Bonpland ex Willdenov) H.B.K. e P. velutina Wooton. Estas espécies foram cultivadas no semiárido brasileiro e cortadas aos 106 meses de idade. As variáveis testadas, sob diferentes formas e combinações, foram altura total, diâmetro da copa e da base das árvores (0,10m), e calculados os diâmetros quadráticos para as alturas de 0,30m e 1,30m. Para todas as espécies, foram recomendadas equações baseadas no modelo y = b1d2 onde y é a biomassa da madeira ou biomassa total da parte aérea e d é o diâmetro quadrático a 0,30m. Para as... |
| Tipo: Artigo de periódico |
Palavras-chave: Peso seco; Equacoes de regressao; Especie florestal; Dry weight; Regression equation; Species; Prosopis; Forests. |
| Ano: 1996 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/282158 |
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| Costa,Newton de Lucena; Moraes,Anibal de; Monteiro,Alda Lúcia Gomes; Motta,Antonio Carlos Vargas; Oliveira,Ricardo Augusto de; Rodrigues,Antonio Neri Azevedo. |
| The effect of nitrogen (N) fertilization (0, 50, 100 and 200 kg N ha-1) on forage yield and morphogenesis of Axonopus aureus was evaluated in the savannas of Roraima State, Brazil. The experimental design was in randomized blocks with three replicates. The grass showed high responsiveness to N fertilization. Dry weight (DW) yield, morphogenetic and structural traits and forage quality were positively affected by N fertilization. The effects of N fertilization on DW yield, N content, leaf appearance rate, leaf elongation rate, number of live leaves/tiller, final leaf length and leaf area index were quadratic and maximum values were estimated with application of 168.8 (2,181 kg ha-1); 124.8 (21.1 g/kg); 158.5 (0.163 leaf/day per tiller); 172.3 (2.75... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry weight; Leaf; Senescence; Tillering. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982013000800002 |
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| Pereira,FHF; Puiatti,M; Finger,FL; Cecon,PR. |
| In this experiment we evaluated the growth, partition of assimilates and yield of melons type hybrid Charenthais 'Fleuron' under different shading nets. The experiment was conducted at Federal University of Viçosa, from November 24, 2003 to March 11, 2004. The treatments consisted of four growth environmental conditions, as follows: control (full sun), and under Aluminet® 30%-O, Cromatinet® 30%-O, Sombrite® 30%, with reduction of photosynthetic active radiation (PAR) of 30.85%, 35.9% and 32.0%, respectively. The experiment was arranged in a complete random design with four replicates. For the periodically evaluated characteristics we used a sub divided parcel 4 x 7 with the growing conditions in the parcel and the evaluations on the sub parcel (0, 14, 28,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo; Light; Leaf area; Dry weight; Yield. |
| Ano: 2011 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362011000100015 |
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| Kaspary,Tiago Edu; Lamego,Fabiane Pinto; Cutti,Luan; Aguiar,Adalin Cezar de Morais; Rigon,Carlos Alberto Gonsiorkiewicz; Basso,Claudir José. |
| ABSTRACT Glyphosate is the herbicide most used worldwide. In cropping systems that rely on repeated applications of glyphosate or cultivate genetically modified soyabean crop, there are numerous cases of glyphosate resistant weeds, including Conyza bonariensis. Differences among competitive ability of Conyza spp. have been found. However, little information is available on the fitness costs related to glyphosate resistance in Conyza bonariensis. We evaluated growth, phenology, and seed viability of glyphosate-resistant (GR) and glyphosate-susceptible (GS) Conyza bonariensis from Brazil, in 2012 (fall/winter) and 2013 (spring/summer). When grown alone, in pots, C. bonariensis GR biotype developed more rapidly than the GS biotype, as evidenced by their... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conyza bonariensis; Plant height; Dry weight; Leaf area; Seed set. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000100092 |
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| Nakao,Allan Hisashi; Andreotti,Marcelo; Soares,Deyvison de Asevedo; Modesto,Viviane Cristina; Dickmann,Lourdes. |
| ABSTRACT Livestock performance in the Brazilian Cerrado has been limited by the low availability of good quality fodder, especially during periods of low rainfall. The aim of this study was to evaluate growth and dry matter production in two cultivars of sorghum, inoculated or not with diazotrophic bacteria, and as a monocrop or intercropped with palisade grass under a system of crop-livestock integration. The experiments were carried out in the field in the Cerrado region during the autumn-winter period of 2015 and 2016, on the experimental farm of the Faculty of Engineering at Ilha Solteira, UNESP, in Selvíria, in the State of Mato Groso do Sul, Brazil (MS). A randomised complete block experimental design was used in a 2 x 2 x 2 factorial scheme with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diazotrophic bacteria; Dry weight; Sorghum bicolor (L.) Moench; Palisade grass. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000300501 |
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| Ros,Clovis Orlando Da; Matsuoka,Marcia; Silva,Rodrigo Ferreira da; Silva,Vanderlei Rodrigues da. |
| ABSTRACT The distribution of phosphorus (P) in the soil interferes with the availability of the nutrient and can affect plant growth. The aim of this study was to compare the growth and accumulation of P in maize, soybean and sunflower plants in vertical gradients of the nutrient in the soil, with and without water stress. The design was completely randomised with five replications, in a 3 x 2 factorial scheme: three soil depth gradients of P (decreasing, increasing and nil) and two conditions of soil water availability (with and with no water stress). The depth gradients of P were in decreasing doses of P2O5 (300, 200, 100 and 0 mg dm-3), increasing doses (0, 100, 200 and 300 mg dm-3) and equal doses (150 mg dm-3) applied to the intermediate layers... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil water; Roots; Dry weight; Nutrient accumulation. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902017000300419 |
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| Hussain,Arif; A. Khakwani,Abdul; Tanveer,Asif; A. Khan,Ejaz; S. Baloch,Mohammad. |
| Abstract Background: Conyza stricta L. (Horse weed) is an annual problematic weed in an agricultural ecosystem and considerably decreases the crop yield and quality. Objective: To determine the most effective pre and post emergence herbicides and their dose to control C. stricta in sugarcane crop. Methods: A two years field study comprised of six herbicides treatments along with weedy check and hand weeding. The design of study was RCBD with three replications. Results: Hand weeding recorded more leaf area index (LAI), crop growth rate (CGR) and net assimilation rate (NAR), biological and stripped yield. However, greater LAI, CGR and NAR, biological and stripped yield were recorded by acetochlor + atrazine at the rate of 2,715 g ha-1 (pre emergence)... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Dry weight; Persistence index; Biological yield; Sugarcane. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100334 |
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| Alvarez Colombo, G.L.; Viñas, M.D.. |
| Themisto gaudichaudii, the most abundant and widely distributed hyperiid amphipod in Argentine shelf waters, provides a source of food for several species of economical value such as the anchovy, mackerel, hake, and squid. Predictive dry weight-length and volume-length regression were established in order to provide an indirect estimation of the individual body mass from a measurement of body length. Samples were collected in San Jorge Gulf and fixed with a 4 o/o formaldehyde solution. The possible effect of formaldehyde fixation on dry weight and volume is discussed. |
| Tipo: Journal Contribution |
Palavras-chave: Dry weight; Length-weight relationships. |
| Ano: 1994 |
URL: http://hdl.handle.net/1834/1928 |
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| Machado, Sebastião do Amaral; Urbano, Edilson; Jarschel, Barbara; Teo, Saulo Jorge; Figura, Marco Aurélio; Silva, Luis César Rodrigues da. |
| This research aimed to determine dry weights and carbon contents by age, and by compartment of Mimosa scabrella trees, their correlations with other measured tree variables. The data for this research work came from 190 trees located in several counties of the Curitiba metropolitan region. Total height, crow height, stem height, DBH and crow diameter were measured of each one of the 190 trees. Every sample tree was felled down and sectioned in the following components: stem, thick branches (diameter ≥ 4 cm), thin branches (diameter < 4 cm), foliage, and dead branches. The green weigth of each tree component was weighted in the field. Small sub samples of each tree component were also weighted in the field and brought to the laboratory for oven dry. Thus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Green weight; Dry weight; Carbon content; Mimosa scabrella Peso verde; Peso seco; Teor de carbono; Bracatingais. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/213 |
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| PEREIRA, J. C. D.. |
| Este trabalho apresenta um metodo alternativo para a determinacao do peso seco de amostras de madeiras. Baseia-se na completa saturacao da amostra e dispensa sua secagem. Nessas amostras completamente saturadas, o peso seco e calculado pelo produto do peso imerso em agua pelo fator 2,887. Para comparar este metodo com o metodo gravimetrico convencional, amostras de alburno e de cerne de Pinus elliottii var. elliottii, Pinus taeda, Eucalyptus grandis e Eucalyptus dunnii foram impregnadas com agua ate peso constante, usando-se centrifugacao e pressao negativa. Depois disso, as amostras foram secas em estufas, a 105 graus centigrados, e pesadas. A impregnacao por centrifugacao foi mais rapida e eficiente do que por pressao negativa. Amostras de alburno... |
| Tipo: Artigo de periódico |
Palavras-chave: Peso seco; Densidade; Dry weight; Moisture content.; Teor de Umidade.; Density.. |
| Ano: 1997 |
URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/282176 |
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| Registros recuperados: 20 | |
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