Consulta: subjectFacets:"Plant height"
Registros recuperados: 28
Data/hora: 06/06/2024 07:28:29

Respuestas agronómicas y fisiológicas del tulipán (Tulipa gesneriana L.) al lantano.
Provedor de dados: 32
Autores: Ramírez Martínez, Maribel.
En esta investigación se presentan resultados de tres experimentos para evaluar el efecto del suministro de lantano (La) en variables agronómicas y fisiológicas de tulipán en solución nutritiva. En el experimento uno se evaluó el efecto del suministro de La (5, 10, 20, 30 y 40 µM) y dos fuentes [LaCl3 y La(NO3)3] durante el ciclo de cultivo de tulipán var. Ile de France, sobre la tasa de crecimiento absoluto (TCA), tasa de crecimiento relativo (TCR), acumulación y distribución de materia seca y acumulación nutrimental. Por efecto de fuente de La no se observaron diferencias significativas. Se observó que la concentración 20 µM La3 aceleró la emergencia, expansión de hoja y floración en comparación con el testigo; por el contrario, concentraciones mayores...
Palavras-chave: Fenología; Materia seca; Concentración; Altura de planta; Diámetro; Clorofilas; Proteínas; Azúcares; Vida en florero; Variedad; Solución preservadora; Phenology; Dry matter; Concentration; Plant height; Diameter; Chlorophyll; Proteins; Sugars; Vase life; Preservation solution; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/380

Respuestas agronómicas y fisiológicas del tulipán (Tulipa gesneriana L.) al lantano.
Provedor de dados: 32
Autores: Ramírez Martínez, Maribel.
En esta investigación se presentan resultados de tres experimentos para evaluar el efecto del suministro de lantano (La) en variables agronómicas y fisiológicas de tulipán en solución nutritiva. En el experimento uno se evaluó el efecto del suministro de La (5, 10, 20, 30 y 40 µM) y dos fuentes [LaCl3 y La(NO3)3] durante el ciclo de cultivo de tulipán var. Ile de France, sobre la tasa de crecimiento absoluto (TCA), tasa de crecimiento relativo (TCR), acumulación y distribución de materia seca y acumulación nutrimental. Por efecto de fuente de La no se observaron diferencias significativas. Se observó que la concentración 20 µM La3 aceleró la emergencia, expansión de hoja y floración en comparación con el testigo; por el contrario, concentraciones mayores...
Palavras-chave: Fenología; Materia seca; Concentración; Altura de planta; Diámetro; Clorofilas; Proteínas; Azúcares; Vida en florero; Variedad; Solución preservadora; Phenology; Dry matter; Concentration; Plant height; Diameter; Chlorophyll; Proteins; Sugars; Vase life; Preservation solution; Doctorado; Edafología.
Ano: 2011
URL: http://hdl.handle.net/10521/380

Yield and phenology of yam as affected by the physiological rest period of seed-rhizomes
Provedor de dados: 75
Autores: Oliveira,Ademar P de; Moura,Márcio F de; Alves,Edna U; Alves,Anarlete U; Oliveira,Arnaldo Nonato P de; Leonardo,Francisco de Assis P; Cruz,Iordam da S.
The objective of this work was to evaluate the effects of the rest period of seed-rhizomes in the phenology and yield of yam Da Costa (Dioscorea cayennensis). The experiment was carried out in field conditions at the Federal University of Paraíba, in Areia, Brazil, from January to December 2004, in an Ustpsamment soil. A completely randomized block design was used to test three treatments, 60-, 80-, and 100-day seed-rhizome rest periods, with seven replications. Plant emergency was evaluated every ten days from 40 to 90 days after planting (DAP), as well as plant height, evaluated up to 80 DAP. The average mass of commercial rhizomes and the yield of commercial and seed-rhizomes were also assessed. At 40, 50, and 60 days after planting, plant emergency was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dioscorea cayennensis; Post-harvest; Dormancy; Emergency; Plant height.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362008000200005

Effect of planting density on green ear yield of maize cultivars bred in different periods
Provedor de dados: 75
Autores: Silva,Paulo Sérgio L e; Duarte,Severino R; Oliveira,Fábio Henrique T de; Silva,Júlio César do V.
Corn cultivation in the Northeast region of Brazil is characterized by a great diversity of production systems, ranging from large companies (modern cultivars and relatively high planting densities) to small farms (family agriculture, traditional cultivars, and low planting densities). In the present work we evaluated the effects of planting density (30; 40; 50; 60; or 70 thousand plants ha-1 - TPH) on green ear yield of cultivars Centralmex (traditional) and AG 510 (hybrid). Different densities were achieved by maintaining 1.0 m between rows and varying the spacing between pits, within the row. Cultivars and planting densities were combined in a factorial scheme, arranged in a random block design with four replicates and four 6 m long row plots. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Green corn; Plant populations; Plant height; Root biomass.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362007000200005

Altura de corte de capim Elefante cv. Cameroon em Rondônia.
Provedor de dados: 14
Autores: GONÇALVES, C. A.; COSTA, N. de L.
Resultados de pesquisa demonstraram que em Ouro Preto e Ariquemes-Rondonia, as maiores producoes de MS sao obtidas com corte a 10 e 20cm e 25 e 30cm acima do solo, respectivamente, enquanto que em Presidente Medice-RO a altura de corte nao afetou a producao de MS, contudo, visando asssegurar maior persistencia da capineira, recomenda-se corte acima de 10cm. Cortes e baixa altura (5 e 10cm) implicam na reducao dos stands e em incremento da infestacao de invasoras. Nos tres locais, a altura de corte nao influenciou os teores de PB da forragem.
Tipo: Comunicado Técnico (INFOTECA-E)
Palavras-chave: Capim Elefante cv Cameroon; Cenchrus purpureus; Plant height; Rondônia; Amazônia Ocidental; Western Amazon; Gramínea Forrageira; Pennisetum Purpureum; Pratica Cultural; Estatura de Planta; Corte; Forage grasses; Plant cultural practices; Plant cuttings.
Ano: 1986
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/698000

Use of growth retardants in wheat
Provedor de dados: 87
Autores: Espindula,M.C.; Rocha,V.S.; Grossi,J.A.S.; Souza,M.A.; Souza,L.T.; Favarato,L.F.
In general, lodging has been controlled by restricting nitrogen fertilizer application and/or using short cultivars. Growth retardants can also be used to solve this problem.The objective of this study was to evaluate the effect of rates and application times of three growth retardants on Pioneiro wheat cultivar. The trial was carried out in Viçosa-MG, from May to September 2005, in a factorial and hierarchical scheme, in a randomized block design with four replications and a control treatment. The treatments consisted of 500, 1,000 and 1,500 g ha-1 of chlormequat; 62.5, 125 and 187.5 g ha-1 of trinexapac-ethyl and 40, 80 and 120 g ha-1 of paclobutrazol applied at growth stages 6 or 8, growth stage used on the scale of Feeks and Large, and a control...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chlormequat; Trinexapac-ethyl; Paclobutrazol; Triticum aestivum; Plant height; Yield.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582009000200022

Growth of lulo (Solanum quitoense Lam.) plants affected by salinity and substrate
Provedor de dados: 94
Autores: Flórez,Sandra Liliana; Lasprilla,Diego Miranda; Chaves,Bernardo; Fischer,Gerhard; Magnitskiy,Stsnislav.
The effects of 0, 30 and 60 mM NaCl and substrates (red peat, sand or 3:1:1 [w/w] mixture of peat, sand, or soil) on vegetative growth of lulo, an Andean fruit species, during 12 weeks were studied. The experiment was carried out by using 2000 cm³ of polypropylene plastic pots under greenhouse conditions. Plant height, number of leaves and nodes, leaf area, total plant dry matter (DM), and shoot/root ratio were evaluated. With the increase of salt concentration, the plant height, the number of leaves and nodes, the leaf areas and plant dry mass DM decreased, whereas shoot/root ratio increased. Sand grown lulo plants were most affected by salinity and presented total mortality at 60 mM NaCl. On the other hand, plants held either in peat or in substrate...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lulo; Naranjilla; Salinity; NaCl; Plant height; Leaf area; Dry matter; Peat; Sand.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000200023

Agronomic evaluation of 32 sorghum cultivars in the Brazilian semi-arid region
Provedor de dados: 96
Autores: Perazzo,Alexandre Fernandes; Carvalho,Gleidson Giordano Pinto de; Santos,Edson Mauro; Pinho,Ricardo Martins Araujo; Campos,Fleming Sena; Macedo,Carlos Henrique Oliveira; Azevêdo,José Augusto Gomes; Tabosa,José Nildo.
The objective of this study was to evaluate agronomic characteristics of 32 sorghum cultivars (Sorghum bicolor(L). Moench) in the Brazilian semi-arid region. The experimental design was set up in randomized blocks with three replications. Treatments were the 32 sorghum cultivars. The evaluated variables were: plant height, stem diameter, tiller density, number of green leaves per tiller, average leaf length, dry matter content, fresh matter production and dry matter production (DMP) in kg/ha, and the percentage of the components panicle, leaf blade and stem. To avoid associative effects due to the presence of positive correlation with DMP, the variables plant height, number of plants per hectare and fresh matter production were excluded for being part of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry matter; Forage; Panicle; Plant height.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000500232

Sample size and sampling method for evaluation of characteristics of the sunflower1
Provedor de dados: 124
Autores: Silva,Paulo Sérgio Lima e; Santos,Luiz Eduardo Barreto dos; Oliveira,Vianney Reinado de; Sousa,Roberto Pequeno de; Fernandes,Patrícia Lianny de Oliveira.
In the sunflower, in addition to seed yield, it is of interest to evaluate number of leaves plant-1, head diameter, stem diameter and plant height, since these characteristics may be associated with seed yield or lodging. The objective of the work was to determine the optimal sample size (from which the experimental coefficient of variation, CV, can be established) for evaluation of these four characteristics. Fifteen cultivars were evaluated in an experimental design of randomized blocks with ten replications. The characteristics were evaluated using two sampling methods (in a single row of plants or in the two rows from the useable area of each plot) and sample sizes of from two to 18 sampling units, with an interval of two plants. In the two sampling...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Helianthus annuus L.; Plant height; Leaf number; Stem diameter; Head diameter.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902015000100144

Magnesium sulphate and the development of the common bean cultivated in an Ultisol of Northeast Australia
Provedor de dados: 63
Autores: Oliveira,Itamar Pereira de; Asher,Colin J.; Edwards,David G.; Santos,Renato S. Mota dos.
Magnesium applications (MgS0(4).7H(2)0) to achieve 8 and 16 mmol c/cm3 of Mg (324 and 1284 kg of MgS0(4) ha-1) were made on one Ultisol from Australia Northeast to correct Mg deficiency in plants and to verify the optimum level of Mg to grow common bean (Phaseolus vulgaris L). Magnesium was applied together with lime, N, K, Cu, Zn, B, and Mo as calcium carbonate, ammonium nitrate, potassium phosphate, cupric and zinc sulphate, boric acid and sodium molybdate respectively a month before planting and P as phosphoric acid at the planting. The pH reached the equilibrium after six weeks of incubation. Higher electrical conductivity (EC) was observed in soil where Mg was applied to reach 8 mmol c/cm3 in the absence of common bean and 16 mmol c/cm3 when the plant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Magnesium; Plant height; Soil pH; Electrical conductivity.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162000000100025

Influence of photoperiod and air temperature on the growth, flowering and maturation of soybean (Glycine max (L.) Merrill)
Provedor de dados: 63
Autores: Câmara,G.M.S.; Sediyama,T.; Dourado-Neto,D.; Bernardes,M.S.
With the purpose to evaluate the effect of short (12 hours) and long (13 and 14 hours) photoperiods and air temperature regimes (winter and summer growing seasons) on soybean behaviour, greenhouse experiments were installed at the Federal University of Viçosa, Brasil, from June 1984 to December 1985. In each experiment, under a completely randomized design with 12 treatments (soybean cultivars) and eight replicates: duration of vegetative period from emergency to stage R1 or flowering (DVP, in days); plant height (PH, m); number of nodes per plant at stage R1 (NNP); and duration of soybean cycle from emergency to stage R7 or physiological maturity point (DC, days), were evaluated. The results permit to conclude that: the vegetative period from emergency to...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenology; Plant height; Photoperiodism.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161997000300017

Soil respiration in cucumber field under crop rotation in solar greenhouse
Provedor de dados: 63
Autores: Liang,Yinli; Bai,Caihong; Mu,Lan; Zhou,Maojuan.
Crop residues are the primary source of carbon input in the soil carbon pool. Crop rotation can impact the plant biomass returned to the soil, and influence soil respiration. To study the effect of previous crops on soil respiration in cucumber (Cucumis statirus L.) fields in solar greenhouses, soil respiration, plant height, leaf area and yield were measured during the growing season (from the end of Sept to the beginning of Jun the following year) from 2007 to 2010. The cucumber was grown following fallow (CK), kidney bean (KB), cowpea (CP), maize for green manure (MGM), black bean for green manure (BGM), tomato (TM), bok choy (BC). As compared with CK, KB, CP, MGM and BGM may increase soil respiration, while TM and BC may decrease soil respiration at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Leaf area; CO2 emission; Plant height; Previous crop; Yield.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162014000400012

Plant response to mechanical resistance and air-filled porosity of soils under conventional and no-tillage system
Provedor de dados: 63
Autores: Silva,Alvaro Pires da; Imhoff,Silvia; Kay,Beverley.
Roots may respond to restrictive soil physical conditions and send signals to shoots to control plant growth. Soil mechanical resistance and aeration can be managed to improve the soil physical conditions for plant growth by using different tillage systems. The objective of this study was to quantify the influence of no-tillage and conventional-tillage systems on plant response to soil mechanical resistance and aeration. The study was carried out on a farm, cultivated with corn, with a side-by-side comparison of no-tillage and conventional-tillage systems. Thirty-two paired sampling sites were located along two transects, located one in each treatment. Soil water content, bulk density, and plant growth were measured in each treatment. Based on the soil...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant growth; Plant height; Soil physical properties; Tillage system.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162004000400016

Evaluation of morphological characteristics in Venezuelan maize (Zea mays L.) genotypes under drought stress
Provedor de dados: 63
Autores: Camacho,R.G.; Caraballo,D.F.
A greenhouse experiment was carried out to evaluate the responses among 10 maize (Zea mays L.) genotypes under drought stress. Seeds were planted in washed sand in plastic pots. The research was established in a completely random design with ten treatments and three replicate pots. The plants were harvested four weeks after sowning, and leaf area per plant (LA), root volume (RV), longest root length (LRL), plant height (PH), fresh (RFW) and dry weight (ROW) of roots, shoot dry weight (SOW), RDW/SDW ratio, and total dry matter production (TDM) were determined. Significant varietal differences for all characters were found, except for LRL. The data obtained allowed to identify Cargill-163 as a poor genotype at low water supply. Danac-3006, FM-6,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Leaf area; Root volume; Root length; Plant height; Root weight; Shoot weight; Total dry matter; Drought resistance.
Ano: 1994
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90161994000300012

Performance of dihaploid wheat lines obtained via anther culture
Provedor de dados: 63
Autores: Salomon,Marcus Vinicius; Camargo,Carlos Eduardo de Oliveira; Petinelli Jr.,Armando; Azevedo Filho,Joaquim Adelino de.
The anther culture technique has been used in breeding programs to obtain haploid plants from hybrid plants of F1 generation and to develop more efficiently wheat cultivars. To study the behavior of dihaploid wheat lines and two check cultivars, IAC-24 and IAC-289, experiments were carried out under sprinkler irrigation at Monte Alegre do Sul, SP, Brazil, in an Haplic Acrisol and at Tatuí, SP, Brazil, in a Rhodic Ferrasol, during the years 1999 and 2000. Genotypes were evaluated for grain yield, 100 grain weight, plant height, resistance to leaf rust (Puccinia recondita f. sp. tritici Rob. Desm.) and lodging. The genotypes were also evaluated under laboratory conditions for their Al+3 toxicity tolerance using nutrient solutions. The line 8, originated from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Grain yield; 100 grain weight; Plant height; Lodging; Tolerance to aluminum.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162003000100007

Rainfall intensity and Mepiquat Chloride persistence in cotton
Provedor de dados: 63
Autores: Souza,Fábio Suano de; Rosolem,Ciro Antonio.
In some regions where cotton is grown in Brazil rainfall amounts to about 2,000 mm per year, which imposes a great risk for Mepiquat Chloride (MP) to be washed from cotton leaves before being absorbed. The objective of this research was to evaluate the MC persistence when applied on cotton plants submitted to different rain intensities after spraying. The treatments were three MC rates: 0, 15.0 and 30.0 g a.i. ha-1 and four simulated rainfalls, applied 90 minutes after MC spraying: 5, 10, 20 and 40 mm, plus a treatment without rain. Cotton plants of the cv. Delta Opal were grown in 12 L pots filled with an Haplortox. The experimental design was consisted of complete randomized blocks, in a factorial scheme, with four replicates. The evaluated parameters...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant growth regulator; Rain washing; Plant height.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162007000200004

Vegetative growth of grain sorghum in response to phosphorus nutrition
Provedor de dados: 63
Autores: Camacho,Rafael; Malavolta,Eurípedes; Guerrero-Alves,José; Camacho,Tomás.
Morphological variables such as phytomass, plant height, leaf area, number of leaves, have been used to express the influence of mineral nutrients on plant growth patterns, since the vegetative development responds, in general, favorably to fertilizer applications. This work evaluates the effect of P on both, some morphological characteristics and total [P] in the shoot of eight grain sorghum (Sorghum bicolor L. Moench) genotypes. Genetic materials were grown in nutrient solution under three concentrations of P (0; 0.5 and 1.0 mmol L-1). Plants were harvested 41 days after sowing, and leaf area per plant (LA), number of leaves (NL) per plant, root volume (RV), plant height (PH), root dry matter (RDM), shoot dry matter (SDM), total dry matter (TDM), RDM/SDM...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Sorghum; Phosphorus; Leaf area; Plant height; Root volume.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162002000400022

High level of copper application to soil and leaves reduce the growth and yield of tomato plants
Provedor de dados: 63
Autores: Sonmez,Sahriye; Kaplan,Mustafa; Sonmez,Namik Kemal; Kaya,Harun; Uz,Ilker.
Copper-containing fertilizers, fungicides and bactericides are extensively used in greenhouses in Turkey. Informations on effects of these applications to plants are scarce. The aim of the present study was to investigate effects of Cu application to a calcareous soil and to leaves on the yield and growth of tomato plants. Cu was first applied to soil as CuSO4.5H2O in three different levels (0, 1000, and 2000 mg Cu kg-1) and then to leaves in three different frequencies (no application, biweekly and weekly) using two cupric fungicides (Cu oxychloride, and Cu salts of fatty and rosin acids) in pot experiments carried out in a computer-controlled greenhouse. Total yield, fruit number, dry root weight and plant height decreased with increasing Cu application...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Dry root weight; Fruit number; Fungicides; Plant height; Greenhouse.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162006000300001

การศึกษาลักษณะทางสัณฐานและสรีรวิทยาที่เกี่ยวข้องกับลักษณะความต้านทานการหักล้มของข้าว
Provedor de dados: 106
Autores: Pharichart Khongsuwan; Anuchart Kotchasatit; Chana Srisompal; Wirongrat Pimsan.
Lodging causes yield reduction of rainfed lowland rice, particularly for the two popular varieties; KDML105 and RD6. Improving lodging resistance varieties has been in slow progress due to lack of understanding of morpho-physiological characters related to lodging resistance and also employing inappropriate protocol to evaluate lodging resistant among breeding lines. Experiments in wet season 2012 at UBN-RRC, NRM-RRC and UDN-RRC, were carried out to study plant characters in association with lodging resistance.  Rice lines used for the study were breeding lines derived from the cross between IR68586/Leuang Hawm/KDML105, a group of short plant height lines together with a group of high yielding lines. Four standard check cultivars, i.e. Niaw Ubon 2,...
Tipo: PhysicalObject
Palavras-chave: Lodging; Lodging resistance; Pushing resistance; Morpho-physiological; Plant height; Rainfed lowland rice; การหักล้ม; ความต้านทานการหักล้ม; แรงต้านทานการหักล้ม; ลักษณะทางสัณฐานและสรีรวิทยา; ความสูงของพืช; ข้าวนาน้ำฝน.
Ano: 2013
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5412

Growth of seven perennial plant species adapted to the Brazilian Semi-Arid
Provedor de dados: 39
Autores: Silva,Paulo Sérgio Lima e; Silva,Kathia Maria Barbosa e; Lôbo,Raimundo Nonato Braga; Silva,Paulo Igor Barbosa e.
Measuring plant height (y) and canopy diameter (x) in trees may not be an easy task, but stem diameter (z) can be more easily evaluated. This work's objective was two-fold: evaluate the growth of species adapted to the Brazilian Semi-Arid Region in the first two years of age, and obtain linear equations to estimate y and x from z, in those species. A random block design with four replications was employed. The values for x, z, and y were measured biannually from October/2003 to March/2005. Prosopis juliflora and Mimosa caesalpiniaefolia showed the highest stem diameter and plant height values, respectively, and both showed the highest canopy diameter. In the equations to estimate plant height from the stem diameter the value of the coefficient of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Caatinga; Canopy diameter; Plant height; Regression analysis; Stem diameter.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062007000400018

Colonization-related functional traits of plants in a 50-hectare plot of secondary tropical forest
Provedor de dados: 39
Autores: Candido,Helder Marcos Nunes; Miazaki,Ângela; Pontara,Vanessa; Bueno,Marcelo Leandro; Solar,Ricardo; Gastauer,Markus; Meira-Neto,João Augusto Alves.
ABSTRACT The growth-survival trade-off hypothesis states that functional traits of stem, wood, leaves and fruits govern acquisitive and conservative strategies of plant species that grow/survive differently in forests. We aimed to determine whether heterogeneity during the colonization of a secondary Atlantic Forest fragment causes differences in colonization-related traits and determines taxonomic composition of subplots. A total of 5,078 subplots were censused with leaf and fruit traits and height measurements being determined for each tree of each species, and with averaged-abundance-weighted values calculated for each subplot. A dendrogram was generated from the taxonomic composition of subplots using Sorensen similarity and UPGMA clustering. A total...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Colonization; Fruit size; LEEP 50-ha plot; Leaf functional traits; Plant height; Wood density; Plant functional traits; Phytosociology.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000100001

Influência de retardante vegetal e densidades de plantas sobre o crescimento, acamamento e produtividade da soja - DOI: 10.4025/actasciagron.v30i3.3547
Provedor de dados: 1
Autores: Junior, Rodolfo Linzameyer; UNIOESTE; Guimarães, Vandeir Franciso; UNIOESTE; Santos, Diego dos; UNIOESTE; Bencke, Michel Henrique; UNIOESTE.
A soja é o principal produto agrícola mundial, justificando investimentos em tecnologias que visem ao aumento da produção e à redução dos fatores adversos à cultura. Desta forma, este trabalho tem como objetivo avaliar o efeito de retardante vegetal, em diferentes densidades de semeadura sobre o crescimento, componentes de produção, produtividade e acamamento na cultura da soja. O experimento foi desenvolvido no Centro Tecnológico Coopavel - Cascavel, Estado do Paraná. O delineamento experimental constitui-se de blocos inteiramente casualizados, com quatro repetições, em esquema fatorial (6X2), sendo os tratamentos obtidos pela combinação das seis doses do retardante e duas densidades de semeadura. Realizaram-se avaliações a cada 14 dias, a partir de 21...
Palavras-chave: 5.01.00.00-9 Agronomia Glycine max (L.) Merrill; Giberelina; Altura de plantas; Densidade de semeadura 5.01.03.00-8 Fitotecnia Glycine max (L.) Merrill; Gibberellin; Plant height; Sowing density.
Ano: 2008
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/3547

Agronomic characteristics of corn hybrids for silage production in the State of Mato Grosso, Brazil - doi: 10.4025/actascianimsci.v35i1.15592
Provedor de dados: 2
Autores: Domingues, Alício Nunes; Universidade Federal de Mato Grosso; Abreu, Joadil Gonçalves de; Universidade Federal de Mato Grosso; Caneppele, Carlos; Universidade Federal de Mato Grosso; Reis, Rafael Henrique Pereira dos; Universidade Federal de Mato Grosso; Behling Neto, Arthur; Universidade Federal de Mato Grosso; Almeida, Cléverton Marcelino de; Universidade Federal de Mato Grosso.
The experiment was conducted at the Experimental Farm of the Federal University of Mato Grosso in the municipality of Santo Antônio do Leverger, State of Mato Grosso, Brazil to evaluate the agronomic characteristics of corn hybrids in the cultivation of second crop for silage production. The experimental design was carried out with randomized blocks with 23 treatments (hybrids) and three replications. Corn hybrids from different seed companies and recommended for the midwestern region of Brazil, were used. The agronomic traits were: stem diameter (cm), plant height and ear insertion (m); yield of green matter (ton. ha-1), percentage of spike, stem and leaves in green mass; ear productivity (ton. ha-1), dry matter content of stem + leaf and whole plant....
Tipo: Experimento de campo; análise laboratorial; pesquisa
Palavras-chave: 5.04.04.01-6 green mass; Plant height; Silage production; Spike yield; Zea mays green mass; Plant height; Silage production; Spike yield; Zea mays.
Ano: 2013
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAnimSci/article/view/15592

Growth, phenology, and seed viability between glyphosate-resistant and glyphosate-susceptible hary fleabane
Provedor de dados: 53
Autores: 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

Dry matter production and partitioning of maize hybrids and dwarf unes at four plant populations
Provedor de dados: 65
Autores: Sangoi,Luis; Salvador,Ricardo.
This experiment was conducted in Ames, Iowa, USA, to compare dry matter accumulation patterns of maize genotypes contrasting in height and leafiness, and to test whether reduction in plant height an leaf number through the use of dwarfing genes or earliness can improve grain dry matter allocation. Five plant genotypes were tested: a full season hybrid adapted to central lowa (NK 4525), a short season hybrid adapted to northern Minnesota (C1070), and three dwarf lines (156-A, 302-E and I17- A). The dwarves contained, respectively, the homozygous, independent, recessive dwarfing genes d3, d1 and br2. Each genotype was sown at four plant populations: 25, 50, 75 and 100.000 plants. ha-1. Hybrids had the greatest rates of decrease in total biomass and grain dry...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Zea mays; Plant height; Density; Harvest index.
Ano: 1997
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84781997000100001

Plant growth regulator losses in cotton as affected by adjuvants and rain
Provedor de dados: 65
Autores: Echer,Fábio Rafael; Rosolem,Ciro Antonio.
Most of Brazilian cotton is produced in regions where annual rainfall exceeds 1,500mm, hence plant growth regulators (PGR) may be washed from the leaves before being absorbed. The objective of this research was to evaluate mepiquat chloride and chlormequat chloride washing from cotton leaves by rains occurring at different moments post spraying. The experiment was conducted in a greenhouse. Both PGR were sprayed to cotton at pin-head square at 15g ha-1 a.i. with and without a silicon-based adjuvant, and simulated rains were applied at 0, 0.75, 1.5, 3.0, 6.0, 12.0 and 24 hours after spraying, plus a control without rainfall. Addition of silicon adjuvant increased PGR uptake. Rainfall occurring up to 24 hours after spraying resulted in some PGR loss from...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Gossypium hirsutum; Plant height; Mepiquat chloride; Chlormequat Chloride; Rainfall.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001200006

Rates of nitrogen and growth retardant trinexapac-ethyl on wheat
Provedor de dados: 65
Autores: Espindula,Marcelo Curitiba; Rocha,Valterley Soares; Souza,Leandro Torres de; Souza,Moacil Alves de; Campanharo,Marcela; Grossi,José Antônio Saraiva.
The objective in this study was to evaluate the effects of nitrogen rates in association with rates of the growth retardant trinexapac-ethyl on wheat. The experiment was conducted in Viçosa, MG and arranged in a 5×4 factorial, randomized block design, with four repetitions. A combination of five nitrogen rates (30, 60, 90, 120 and 150kg ha-1) with four rates of trinexapac-ethyl (0, 62.5, 125 and 187.5g ha-1) were tested. Trinexapac-ethyl promotes reduction of soot dry mass and grain yield at the lowest N rates, but at the highest N rates there is increase in these characteristics. The combination between N and trinexapac-ethyl rates that promotes higher shoot dry mass is 150kg ha-1 and 187g ha-1 but that promotes higher grain yield is 100kg ha-1 and 120g...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Triticum aestivum; Plant height; Lodging; Grain yield.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782011001200002

Weed interference periods in sesame crop
Provedor de dados: 64
Autores: Lins,Hamurábi Anizio; Souza,Matheus de Freitas; Albuquerque,José Ricardo Tavares de; Santos,Manoel Galdino dos; Barros Júnior,Aurélio Paes; Silva,Daniel Valadão.
ABSTRACT The sesame crop (Sesamum indicum L.) is sensitive to competition with weeds because of its low competitiveness that is directly linked to its slow initial growth. The control of weeds in the crop is an essential practice to ensure the high productivity of this oilseed. Therefore, to define the critical period of interference prevention is important to ensure efficiency and low control costs. Factors such as cultivar, environmental conditions, and cultivation system may alter the critical weed interference prevention period (CPWC). Therefore, the objective of this work was to determine the critical weed interference prevention period in two sesame cultivars. The critical weed interference prevention period for sesame cultivars, BRS Seda and CNPA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Competition; Leaf area; Plant height; Productivity; Oilseeds.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542019000100220