influencia de las malezas sobre el cultivo de frijol en función de espaciamiento y de la densidad de plantas weeds influence in common bean as a function of spacing and plant density
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2011
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Abstract
La hipótesis de investigación es que con la reducción de la densidad de siembra y del espaciamiento entre líneas, el período anterior a la interferencia de las malezas será reducido en el cultivo de frijol. El objetivo de este trabajo fue determinar el período anterior a la interferencia de las malezas (PAI) en función del espaciamiento entre líneas y de su densidad poblacional. Los tratamientos fueron constituidos de ocho períodos de convivencia del cultivo con las malezas: 0-10, 0-20, 0-30, 0-40, 0-50, 0-60, 0-70 y 0-80 días después de la emergencia y un control libre de interferencia. Los períodos de convivencia fueron aplicados en dos experimentos, utilizando dos distancias entre líneas, de 0,45 y 0,60 m y en dos densidades de plantas por línea de siembra, de 10 y 15 plantas por metro. El delineamiento experimental utilizado fue en bloques completos al azar, con cuatro repeticiones. Hubo reducción de 16, 40, 36 y 58% en la productividad de granos del cultivo de frijol cuando convivió durante todo el ciclo del cultivo con las malezas, para el espaciamiento de 0,45 m en las densidades de 10 y 15 plantas m-1; y espaciamiento de 0,60 m y densidades de 10 y 15 plantas m-1, respectivamente. La productividad de granos pasó a ser afectada negativamente a partir de 28, 26, 22 y 14 días después de la emergencia, constituyéndose en los períodos anteriores a la interferencia del cultivo, respectivamente.
Hypothesis is that reducing the density and the spacing between the lines, the period prior to the interference of weeds will be reduced by the bean crop. The aim of this study was to determine the period prior to weed interference (PPI) with the bean crop in terms of row spacing and population density. Treatments consisted of eight periods of weed coexistence with the crop: 0-10, 0-20, 0-30, 0-40, 0-50, 0-60, 0-70 and 0-80 days after crop emergence. The periods of coexistence were applied in two experiments, using two spacings, 0.45 and 0.60 m in two plant densities amounts per seed, 10 and 15 plants per meter. For each row spacing and seed density, the experimental design used was the randomized blocks, with four repetitions per treatment. Grain yield of the crop showed decreases of 16, 40, 36 and 58% when the coexistence with the weed was during all the cycle of the crop for row spacing of 0,45 m and seeding density of 10 and 15 plants per meter; and row spacing of 0,60 m and seeding density of 10 and 15 plants per meter, respectively. The period prior to weed interference (PPI) occurred in 28, 26, 22 e 14 days after crop emergence, respectively.
Hypothesis is that reducing the density and the spacing between the lines, the period prior to the interference of weeds will be reduced by the bean crop. The aim of this study was to determine the period prior to weed interference (PPI) with the bean crop in terms of row spacing and population density. Treatments consisted of eight periods of weed coexistence with the crop: 0-10, 0-20, 0-30, 0-40, 0-50, 0-60, 0-70 and 0-80 days after crop emergence. The periods of coexistence were applied in two experiments, using two spacings, 0.45 and 0.60 m in two plant densities amounts per seed, 10 and 15 plants per meter. For each row spacing and seed density, the experimental design used was the randomized blocks, with four repetitions per treatment. Grain yield of the crop showed decreases of 16, 40, 36 and 58% when the coexistence with the weed was during all the cycle of the crop for row spacing of 0,45 m and seeding density of 10 and 15 plants per meter; and row spacing of 0,60 m and seeding density of 10 and 15 plants per meter, respectively. The period prior to weed interference (PPI) occurred in 28, 26, 22 e 14 days after crop emergence, respectively.
| Reference Key |
parreira2011plantainfluencia
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| Authors | ;M.C Parreira;P.L.C.A Alves;L.A Peñaherrera-Colina |
| Journal | anti-cancer agents in medicinal chemistry |
| Year | 2011 |
| DOI |
10.1590/S0100-83582011000400006
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