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| Registros recuperados: 15 | |
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| MONTEIRO, M. A. R.; SILVA, A. de S.; BRITO, L. T. de L.; PORTO, E. R.. |
| Para se determinar as populacoes de milho variedade Centralmex, com o sistema de captacao de agua de chuva "in situ", mais adequadas as regioes com elevada irregularidade pluviometrica espaco-temporal, foram instalados experimentos nos anos agricolas de 82/83, 83/84 e 84/85 no Campo Experimental da Caatinga do CPATSA-EMBRAPA, avaliando cinco densidades de plantio (75.000, 60.000, 45.000, 30.000 e 15.000 plantas/ha). O delineamento experimental foi em blocos ao acaso com seis repeticoes. Houve um efeito altamente significativo da densidade de plantio sobre a produtividade do milho nos tres anos. A analise conjunta apresentou um efeito significativo ao nivel de 1% de probabilidade para os anos e para a interacao ano-densidade. |
| Tipo: Parte de livro |
Palavras-chave: Captacao in situ; Sequeiro; Dry farming; Management; Agricultura; Água; Espaçamento; Manejo; Milho; Zea Mays; Agriculture; Corn; Row spacing; Water. |
| Ano: 1989 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/132603 |
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| Skonieski,Fernando Reimann; Nörnberg,José Laerte; Kessler,Julcemar Dias; David,Diego Bitencourt de; Azevedo,Eduardo Bohrer de; Brüning,Gilmar; Pimentel,Concepta Margaret McManus. |
| This experiment was carried out to evaluate the effects of the row spacing between corn plants on silage quality. Different spacing between corn rows (40, 60, and 80 cm) was used, but the population of plants was maintained around 65,000/ha in all treatments. Analysis of variance was carried out and means were compared by Tukey's test at 5% of probability. A reduction in row spacing provided better spatial distribution of plants, but did not alter morphological composition or dry matter production. The corn with most equidistant spatial distribution (lowest row spacing) showed an increase in lignin concentration, neutral detergent fiber, and total carbohydrates, and showed a decrease in total digestible nutrients when compared with 80 cm row spacing.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbohydrate fractionation; Nutritional value; Protein fractionation; Row spacing. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-35982014000300002 |
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| MARCHÃO, R. L.; BRASIL, E. M.. |
| ABSTRACT: The increment on plant density in narrow row spacing resulted in a greater absorption of photosynthetic active radiation particularly in tropical environments as in the Cerrado Biome. This review aims to analyze the main factors that affect plant arrangement definition in maize, the changes in plant arrangement recommendation and, the modification in plant traits that favored such changes. The choice of plant arrangement in the field must take into account cultivar, grower objective, input availability, planting date and disponible farmer structure. The association between better crop management and highly productive hybrids favored the increase in plant density and reduction in row spacing. Most of research results showed that grain yield was... |
| Tipo: Folhetos |
Palavras-chave: Maize; Densidade de Plantio; Espaçamento; Milho; Semeadura; Zea Mays; Plant density; Row spacing. |
| Ano: 2007 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/570882 |
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| GONÇALVES, C. A.; MEDRADO, M. J. S.. |
| Procurou-se avaliar o efeito do espacamento na propagacao vegetativa do Quicuio da Amazonia, comparando-o com o plantio atraves de sementes, visando a formacao de pastagens economicamente viavel e em menor espaco de tempo. Utilizou-se delineamento de blocos ao acaso com tres repeticoes e onze tratamentos sendo dez plantio por mudas (2 x 2m), 2 x 1,5m, 2 x 1,0m, 2 x 0,5m, 1,5 x 1,5m, 1,5 x 1m, 1,5 x 0,5m, 1 x 1m, 1 x 0,5m, e um plantio por semente(15 kg/ha) a lanco. As parcela de 10 x 10m foram adubadas com 50kg/ha de P2O5, sendo metade na forma de superfosfato simples e metade na forma de hiperfosfato. A correcao do solo foi com aplicacao de 2t/ha de calcario dolomitico. Considerando-se custo, tempo e percentagem de formacao , concluiu-se que: a propagacao... |
| Tipo: Folhetos |
Palavras-chave: Porto Velho (RO); Rondônia; Amazônia Ocidental; Western Amazon; Propagação Vegetativa; Gramínea Forrageira; Capim Quicuio; Espaçamento; Brachiaria Humidicola; Vegetative propagation; Urochloa humidicola; Row spacing; Forage grasses. |
| Ano: 1982 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/697974 |
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| Goulart,Eduardo da S; Braga Schuch,Luis O; Tunes,Lilian V. Madruga de; Vieira,Jucilayne F. |
| The practices and techniques used in irrigated rice to improve performance include optimal plant density and the best arrangement of the plants in an area. This study aims to evaluate the performance and plasticity in the yield and grain quality of three rice hybrids using different row spacing. The field experiments were conducted during the 2010/2011 season in rice crops in Capão do Leão, Viamão and Uruguaiana in the state of Rio Grande do Sul, Brazil. Three different sowing arrangements were evaluated, i.e., row spacing of 17 cm, 34 cm, and 17 cm alternated with 34 cm, which corresponded to densities of 40, 20 and 32 kg ha-1, respectively. The experimental design used was randomized blocks with subdivided plots replicated three times considering each... |
| Tipo: Journal article |
Palavras-chave: Irrigated rice; Oryza sativa L; Plant densities; Row spacing. |
| Ano: 2015 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202015000100008 |
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| 申, 宝明; 佐藤, 禎稔; 今村, 城久; 弘中, 和憲; 岸本, 正; SHEN, Baoming; SATOW, Tadatoshi; IMAMURA, Kunihisa; HIRONAKA, Kazunori; KlSHIMOTO, Tadashi. |
| 本報はうね自動追従システムの開発のための基 本研究として畑作のトラクタ作業者の作業状態と うね合わせ作業精度を明らかにし,自動追従シス テムに要求される制御速度を検討し,以下のこと が明らかになった。 1)作業者の後方確認時間割合は播種・移植作業 の場合10～16%であるのに対し,中耕除草作業 では16～27%と高くなった。 2)うね合わせの作業精度は,播種・移植作業の場 合,隣接行程のうね問の変動は,最大7.5～11.5 cmであり,その後の中耕除草作業への影響が懸 念される。一方,中耕除草作業の場合では,その 最大変動は8.2cmに達し,作物に機械的な損傷 を与えることが観察された。 3)うね間の周期性から求めたうね自動追従システ ムに要求される制御速度は,トラクタの作業速度 を2m/sに想定すると,播種・移植作業では最大 6.6cm/sであり,中耕除草作業の場合は,10cm/s 必要であると推定された。 This study was to examine farmer's working conditions and the accuracy of tractor imple- ments in following rows in a field, and to consider the most appropriate control speed of such implements as preliminary research for the development of an automatic guidance system. 1)In the case of seeding and transplanting, 10 to 16 percent of farmers' work... |
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Palavras-chave: 管理作業; トラクタ作業機; うね間; 作物列センサ; 制御速度; 循環型農業; Crop management; Tractor implements; Row spacing; Crop row sensor; Control speed; Circulation type agriculture. |
| Ano: 2010 |
URL: http://ir.obihiro.ac.jp/dspace/handle/10322/2676 |
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| Registros recuperados: 15 | |
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