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Registros recuperados: 31
Primeira ... 12 ... Última
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DREB1A allows for more water uptake in groundnut by a large modification in the root/shoot ratio under water deficit Open Agri
Vadez, V..
Palavras-chave: Transgenics; Evapotranspiration; Drought stress; Genotypes; Nutrient uptake; Transgenic plants; Transpiration (animals); Harvest index; Transcription; Transcription factors.
Ano: 2007 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3355
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Drought Research Priorities for the Dryland Tropics Open Agri
F.R..
Palavras-chave: Crops; Soil water; Transpiration (animals); Water balance; Weather hazards; Drought stress; Harvest index; Leaf area; Water potential.
Ano: 1988 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4045
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Dry matter production and distribution in three cassava (Manihot esculenta Crantz) cultivars during the second vegetative plant cycle BABT
Sagrilo,Edvaldo; Vidigal Filho,Pedro Soares; Pequeno,Manoel Genildo; Gonçalves-Vidigal,Maria Celeste; Kvitschal,Marcus Vinícius.
A study was carried out in Araruna County, State of Paraná, to understand the relationship between the total dry matter yield and its proportion allocated to the storage roots of cassava (Manihot esculenta Crantz) plants in the second vegetative cycle. The experimental design was a randomized complete block in split-plot scheme with four replications. The plots consisted of the Mico, IAC 13 and IAC 14 cultivars and the monthly harvesting dates were assessed in the sub-plots. The results showed that the Mico and IAC 13 cultivars were more efficient in allocating dry matter to the storage roots. The IAC 14 cultivar allocated a higher proportion of assimilates to stems compared with the other two cultivars. With regard to the influence of harvesting time, the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Harvesting time; Dry matter allocation; Harvest index.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132008000600001
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Dry matter production and partitioning of maize hybrids and dwarf unes at four plant populations Ciência Rural
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
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Efeito do tamanho da semente na acumulação de biomassa e nutrientes e na produtividade do feijoeiro. Repositório Alice
PERIN, A.; ARAÚJO, A.P.; TEIXEIRA, M.G..
O objetivo deste trabalho foi avaliar o efeito do tamanho da semente na acumulação de biomassa e nutrientes e no rendimento de grãos de cultivares de feijoeiro (Phaseolus vulgaris L.) no campo. O delineamento experimental foi em blocos ao acaso, em esquema fatorial 3x2 com quatro repetições: três cultivares (Kaboon, Manteigão e Carioca) e dois tamanhos de semente (pequeno e grande). Foram efetuadas nove amostragens semanais de biomassa entre 14 e 70 dias após semeadura. As sementes grandes aumentaram a altura da planta, o índice de área foliar e a biomassa da parte aérea e raiz desde a primeira amostragem, mas não modificaram a massa de vagens. No início do experimento, as sementes grandes aumentaram a taxa de crescimento da cultura, mas este efeito...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Phaseolus vulgaris; Taxa de crescimento; Índice de colheita; Componentes de rendimento; Growth rate; Harvest index; Yield components.
Ano: 2002 URL: http://www.alice.cnptia.embrapa.br/handle/doc/108851
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Effect of low-light stress at various growth phases on yield and yield components of two rice cultivars International Rice Research Institute
Singh, S..
p.36-37
Palavras-chave: Crop growth stage; Crop yield; Growth; Harvest index; Light intensity; Panicles; Plant height; Spikelets; Sterility; Stress; Stress response; Yield components.
Ano: 2005 URL: http://hdl.handle.net/123456789/1171
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Enhancing adaptation of extra-short-duration pigeonpea by improving plant type Open Agri
Y.S..
Palavras-chave: Pigeonpeas; Genotypes; Grain legumes; Harvest index; Wheats; Sowing date; Cropping systems; Photoperiodicity; Soil water regimes; Sole cropping.
Ano: 1995 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/4185
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Fertilización orgánica Vs mineral en el rendimiento y contenido de capsaicina en chile manzano (Capsicum pubescens R. y P.). Colegio de Postgraduados
Carlos Marcelo, Rufina.
El chile manzano (Capsicum pubescens R. y P.) es originario de Perú y Bolivia, fue introducido a México a principios del siglo XX. Este tipo de chile se produce a altitudes de 1700 a 2500 m. En La Sierra Norte de Puebla la producción de este cultivo se hace a nivel de traspatio, con manejo insuficiente de fertilización y control de plagas. Como parte de una propuesta para mejorar el manejo de este cultivo, y hacer uso de los recursos disponibles en la región, que también se dedica a la ganadería para producción de leche, se compararon dos sistemas de producción, uno con fertilización orgánica y otro con fertilización química, en rendimiento y la calidad del fruto de chile. En el sistema con fertilización química la dosis 200-100-200 (NPK), se fracciono en...
Palavras-chave: Capsicum pubescens; Fertilización orgánica; Indice de cosecha; Diámetro; °Brix; Organic fertilization; Harvest index; Diameter; Edafología; Maestría.
Ano: 2012 URL: http://hdl.handle.net/10521/772
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Fifty years of wheat breeding in Southern Brazil: yield improvement and associated changes. Repositório Alice
RODRIGUES, O.; LHAMBY, J. C. B.; DIDONET, A. D.; MARCHESE, J. A..
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Trigo; Triticum aestivum; Ganho genético; Índice de colheita; Componentes de rendimento; Melhoramento genético vegetal; Genetic gain; Harvest index; Yield components.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/823935
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Fifty years of wheat breeding in Southern Brazil: yield improvement and associated changes Repositório Alice
RODRIGUES, O.; LHAMBY, J.C.B.; DIDONET, A.D.; MARCHESE, J.A..
The objective of this study was to assess the impact of genetic breeding on grain yield, and to identify the physiological traits associated to the increment in yield and their related growth processes, for wheat cultivars grown in Southern Brazil, in the past five decades. Seven wheat cultivars released between 1940 and 1992, were compared for physiological aspects associated with grain yield. Grain yield, biological yield, biomass partitioning, harvest index and grain yield components were also determined. The number of grains per square meter was more affected by plant breeding and was better correlated with grain yield (r = 0.94, p<0.01) than with grain weight (r = -0.39ns). The higher number of grains per square meter was better correlated with the...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Triticum aestivum; Genetic gain; Harvest index; Yield components; Ganho genético; Índice de colheita; Componentes de rendimento.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/126161
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Fifty years of wheat breeding in Southern Brazil: yield improvement and associated changes PAB
Rodrigues,Osmar; Lhamby,Julio César Barreneche; Didonet,Agostinho Dirceu; Marchese,José Abramo.
The objective of this study was to assess the impact of genetic breeding on grain yield, and to identify the physiological traits associated to the increment in yield and their related growth processes, for wheat cultivars grown in Southern Brazil, in the past five decades. Seven wheat cultivars released between 1940 and 1992, were compared for physiological aspects associated with grain yield. Grain yield, biological yield, biomass partitioning, harvest index and grain yield components were also determined. The number of grains per square meter was more affected by plant breeding and was better correlated with grain yield (r = 0.94, p<0.01) than with grain weight (r = -0.39ns). The higher number of grains per square meter was better correlated with the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Triticum aestivum; Genetic gain; Harvest index; Yield components.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000600008
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Growth and yield of common bean cultivars at two soil phosphorus levels under biological nitrogen fixation PAB
ARAÚJO,ADELSON PAULO; TEIXEIRA,MARCELO GRANDI; ALMEIDA,DEJAIR LOPES DE.
The genotypic differences on growth and yield of common bean (Phaseolus vulgaris L.) in response to P supply were evaluated in a field experiment under biological N2 fixation. Eight cultivars were grown at two levels of applied P (12 and 50 kg ha-1 of P -- P1 and P2 respectively), in randomized block design in factorial arrangement. Vegetative biomass was sampled at three ontogenetic stages. The effects of genotype and phosphorus were significant for most traits, but not the genotype ´ phosphorus interaction. The cultivars presented different patterns of biomass production and nutrient accumulation, particularly on root system. At P1, P accumulation persisted after the beginning of pod filling, and P translocation from roots to shoots was lower. The nodule...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Genotype; Harvest index; Nodulation; Phaseolus vulgaris.
Ano: 2000 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2000000400019
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Higher crop performance of rice hybrids than of elite inbreds in the tropics: 1. Hybrids accumulate more biomass during each phenological phase International Rice Research Institute
Bueno, C. S.; Lafarge, T..
Article in press
Tipo: Article Palavras-chave: Shoot biomass accumulation; Crop and organ growth rate; Hybrid rice; Maturity group; Harvest index; Tillering; Specific leaf area.
Ano: 2009 URL: http://hdl.handle.net/10269/1378
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Higher crop performance of rice hybrids than of elite inbreds in the tropics: 2. Does sink regulation, rather than sink size, play a ,ajor role? International Rice Research Institute
Lafarge, Bueno, C.S. T..
Article in press
Tipo: Article Palavras-chave: Rice growth; Dry season; Dry matter production; Rice filling period; Harvest index; Rice hybrids; Rice varieties; Lodging; Rice panicles; Source sink relations.
Ano: 2009 URL: http://hdl.handle.net/10269/1379
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Increased chickpea yield and economic benefits by improved crop production technology in rainfed areas of Kurnool district of Andhra Pradesh, India Open Agri
Ramakrishna, A..
Palavras-chave: Chickpeas; Harvest index; Production technology; Grain legumes; On-farm research; Sowing rates; Soil analysis; Watersheds; Seed treatment; Genotypes.
Ano: 2005 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3251
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INTERNATIONAL WORKSHOP ON GRAIN LEGUMES Open Agri
Palavras-chave: Grain legumes; Legumes; Grain; Pigeonpeas; Chickpeas; Harvest index; Root nodulation; Amino acids; Breeds (animals).
Ano: 1975 URL: http://agropedia.iitk.ac.in/openaccess/?q=node/3967
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Leaf gas exchange and yield of three upland rice cultivars. Repositório Alice
ALVAREZ, R. de C. F.; HABERMANN, G.; CRUSCIOL, C. A. C.; NASCENTE, A. S.; RODRIGUES, J. D..
Studies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. 'Caiapó'), intermediate (cv. 'Primavera') and modern (cv. 'Maravilha') upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m2 and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in ?Primavera?, which may be explained by...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Índice de colheita; Intercâmbio de gases; Arroz; Oryza sativa; Gas; Fisiologia; Harvest index; Gas exchange; Rice.
Ano: 2015 URL: http://www.alice.cnptia.embrapa.br/handle/doc/1017076
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Leaf gas exchange and yield of three upland rice cultivars Bragantia
Alvarez,Rita de Cássia Félix; Habermann,Gustavo; Crusciol,Carlos Alexandre Costa; Nascente,Adriano Stephan; Rodrigues,João Domingos.
Studies of physiological parameters associated with crop performance and growth in different groups of upland rice (Oryza sativa L.) may support plant breeding programs. We evaluated the role of gas exchange rates and dry matter accumulation (DMA) as traits responsible for yields in a traditional (cv. ‘Caiapó’), intermediate (cv. ‘Primavera’) and modern (cv. ‘Maravilha’) upland rice cultivars. Leaf gas exchange rates, DMA, leaf area index (LAI), harvest indexes (HI) and yield components were measured on these genotypes in the field, under sprinkler irrigation. Panicles per m2 and DMA at flowering (FL) and heading, as well as CO2 assimilation rates (A) were similar across these cultivars. The highest yield was found in ‘Primavera’, which may be explained by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oryza sativa; Net photosynthesis; Harvest index; Dry matter accumulation rates; Crop growth rate.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052015000100001
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Leaf senescence of common bean plants as affected by soil phosphorus supply Rev. Bras. Ciênc. Solo
Araújo,Adelson Paulo; Kubota,Flavio Yuudi; Teixeira,Marcelo Grandi.
Responses of leaf senescence to P supply could constitute adaptive mechanisms for plant growth under P-limiting conditions. The aim of this study was to evaluate the effects of soil P supply on leaf senescence of common bean (Phaseolus vulgaris L.). Eight P levels, ranging from 5 to 640 mg kg-1 P, were applied to pots containing four bean plants of cultivar Carioca in 10 kg of an Oxic Haplustult soil. Attached leaves were counted weekly, abscised leaves were collected every other day, and seeds were harvested at maturity. The number of live leaves increased until 48 days after emergence (DAE) and decreased afterwards, irrespective of applied P levels. At lower applied P levels, the initial increase and the final decrease of leaf number was weak, whereas at...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Growth; Harvest index; Ontogeny; Phaseolus vulgaris.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832007000300010
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Main Stem and Tiller Contribution to Wheat Cultivars Yield Under Different Irrigation Regimes BABT
Destro,Deonisio; Miglioranza,Édison; Arias,Carlos Alberto Arrabal; Vendrame,Jefferson Marcos; Almeida,José Carlos Vieira de.
The present study was carried out to determine the contribution of main stems and tillers to the total yield of two wheat cultivars (Triticum aestivum L.), Cocoraque and BH-1146, under two water treatments: a) normal field conditions, and; b) irrigation, in Londrina, PR, Brazil. The experiment was an eight replication randomized complete block design with treatments arranged in split-plots. Data on total grain yield, main stem grain yield, tillers grain yield, the ratio between tiller and total grain yield, yield components and other 17 traits were collected. The cultivar BH-1146 had a higher total grain yield in relation to Cocoraque under normal field conditions; i, e., under water stress. Main stem grain yield responded positively and significantly to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Harvest index; Growth period; Hectolitric weight; Poaceae; Water stress.
Ano: 2001 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132001000400001
Registros recuperados: 31
Primeira ... 12 ... Última
 

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