Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days
The vegetative growth and the crop coefficient (kc) for irrigated beans (Phaseolus vulgaris L.) was studied in relation to accumulated growing-degree-days (SG). A completely randomized design was used with three treatments and four replicates. Population density treatments were: crop sowed in evapotranspirometers at a density of 50 plants m-2 reduced to 25 plants m-2, when the canopy achieved full ground cover; and crop sowed with population densities of 14 and 28 plants m-2 in irrigated field. Crop growth was evaluated considering dry matter, vegetative ground cover and the leaf area index. All traits had a highly significant relationship to SG, even though plant density and water supply conditions affected them. The relationship between the basal crop coefficient (kcb) and SG was highly significant in the evapotranspirometers. In the field, the surface wetting after the rain or irrigation and the mild water deficits affected the correlations (r2) between kc and SG. The phenological events of the plants studied were not affected by the treatment, when related to accumulated growing-degree-days.
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Pesquisa Agropecuaria Brasileira
2000
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rev-pab-br-article-59542014-08-19T19:26:16Z Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days Crescimento vegetativo e coeficiente de cultura do feijoeiro relacionados a graus-dia acumulados Medeiros, Gerson Araujo de Arruda, Flavio Bussmeyer Sakai, Emílio Fujiwara, Mamor Boni, Newton Roberto Phaseolus vulgaris; irrigation; plant population; agronomic characters; ground cover; leaf area; dry matter Phaseolus vulgaris; irrigação; população de plantas; características agronômicas; cobertura vegetal; área foliar; matéria seca The vegetative growth and the crop coefficient (kc) for irrigated beans (Phaseolus vulgaris L.) was studied in relation to accumulated growing-degree-days (SG). A completely randomized design was used with three treatments and four replicates. Population density treatments were: crop sowed in evapotranspirometers at a density of 50 plants m-2 reduced to 25 plants m-2, when the canopy achieved full ground cover; and crop sowed with population densities of 14 and 28 plants m-2 in irrigated field. Crop growth was evaluated considering dry matter, vegetative ground cover and the leaf area index. All traits had a highly significant relationship to SG, even though plant density and water supply conditions affected them. The relationship between the basal crop coefficient (kcb) and SG was highly significant in the evapotranspirometers. In the field, the surface wetting after the rain or irrigation and the mild water deficits affected the correlations (r2) between kc and SG. The phenological events of the plants studied were not affected by the treatment, when related to accumulated growing-degree-days. Estudou-se o crescimento vegetativo e o coeficiente de cultura (kc) do feijoeiro (Phaseolus vulgaris L.), relacionando-os ao índice de graus-dia acumulados (SG). O delineamento experimental foi o inteiramente casualizado com três tratamentos e quatro repetições. Os tratamentos de densidade populacional de plantas foram: cultura semeada em evapotranspirômetros a uma densidade de 50 plantas m-2, com redução para 25 plantas m-2, quando alcançada a cobertura completa do solo; cultura semeada com densidades populacionais de 14 e 28 plantas m-2 em campo irrigado. Os parâmetros de crescimento da cultura, como a matéria seca total, a porcentagem de cobertura vegetal e o índice de área foliar mostraram uma relação altamente significativa com SG, tendo sido afetada pelos tratamentos e pelas condições de suprimento de água. A relação entre o coeficiente de cultura basal (kcb) e SG foi altamente significativa para a cultura semeada nos evapotranspirômetros. No campo, o molhamento da superfície do solo após a chuva ou irrigação e o déficit hídrico moderado afetaram as correlações (r2) entre kc e SG. Os tratamentos não alteraram os estádios fenológicos da cultura, quando correlacionados com graus-dia acumulados. Pesquisa Agropecuaria Brasileira Pesquisa Agropecuária Brasileira 2000-09-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf https://seer.sct.embrapa.br/index.php/pab/article/view/5954 Pesquisa Agropecuaria Brasileira; v.35, n.9, set. 2000; 1733-1742 Pesquisa Agropecuária Brasileira; v.35, n.9, set. 2000; 1733-1742 1678-3921 0100-104x por https://seer.sct.embrapa.br/index.php/pab/article/view/5954/3058 |
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Medeiros, Gerson Araujo de Arruda, Flavio Bussmeyer Sakai, Emílio Fujiwara, Mamor Boni, Newton Roberto |
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Medeiros, Gerson Araujo de Arruda, Flavio Bussmeyer Sakai, Emílio Fujiwara, Mamor Boni, Newton Roberto Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| author_facet |
Medeiros, Gerson Araujo de Arruda, Flavio Bussmeyer Sakai, Emílio Fujiwara, Mamor Boni, Newton Roberto |
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Medeiros, Gerson Araujo de |
| title |
Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| title_short |
Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| title_full |
Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| title_fullStr |
Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| title_full_unstemmed |
Vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| title_sort |
vegetative growth and bean crop coefficient as related to accumulated growing-degree-days |
| description |
The vegetative growth and the crop coefficient (kc) for irrigated beans (Phaseolus vulgaris L.) was studied in relation to accumulated growing-degree-days (SG). A completely randomized design was used with three treatments and four replicates. Population density treatments were: crop sowed in evapotranspirometers at a density of 50 plants m-2 reduced to 25 plants m-2, when the canopy achieved full ground cover; and crop sowed with population densities of 14 and 28 plants m-2 in irrigated field. Crop growth was evaluated considering dry matter, vegetative ground cover and the leaf area index. All traits had a highly significant relationship to SG, even though plant density and water supply conditions affected them. The relationship between the basal crop coefficient (kcb) and SG was highly significant in the evapotranspirometers. In the field, the surface wetting after the rain or irrigation and the mild water deficits affected the correlations (r2) between kc and SG. The phenological events of the plants studied were not affected by the treatment, when related to accumulated growing-degree-days. |
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Pesquisa Agropecuaria Brasileira |
| publishDate |
2000 |
| url |
https://seer.sct.embrapa.br/index.php/pab/article/view/5954 |
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