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Effect of plant spacing on Growth and Grain Yield of Soybean

American Journal of plant Sciences 2013年第10期4卷 2011-2014页

作者： Bhagirath S.Chauhan Jhoana L.Opena Weed Scientist and Assistant Scientist Weed ScienceCrop and Environmental Sciences DivisionInternational Rice Research InstituteLos BanosPhilippines

In the Philippines, rice monoculture systems are common. Compared to these systems, the rice-soybean cropping system may prove more water-efficient and there is a trend of increasing soybean area in the response to water scarcity and need for crop diversification in the Philippines. A field study was conducted to evaluate the effect of row and plant to plant spacing (20 × 10, 20 × 5, 40 × 10, and 40 × 5 cm) on growth and yield of soybean. plant height was not influenced by the plant geometry. spacing, however, influenced leaf area and shoot biomass of soybean. plants grown at the widest spacing (i.e., 40 × 10 cm) produced lowest leaf area and shoot biomass at 6 and 12 weeks after planting. Leaf area and shoot biomass at other three spacing were similar. There was a negative and linear relationship between weed biomass and crop shoot biomass at 6 and 12 weeks after planting. Grain yield of soybean was not affected by plant geometry and it ranged from 1.3 to 1.9 t·ha-1 at different spacing.

关键词： Row spacing plant to plant spacing Leaf Area Weed Biomass

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Effect of plant Geometry on Growth and Yield of Corn in the Rice-Corn Cropping System

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American Journal of plant Sciences 2013年第10期4卷 1928-1931页

作者： Bhagirath S.Chauhan Jhoana L.Opena Weed Science Crop and Environmental Sciences DivisionInternational Rice Research InstituteLos BanosPhilippines

The rice-corn cropping system is increasing in Asia in response to increased demand of corn for feed. A field study was conducted to evaluate the effect of plant geometry (row and plant to plant spacing: 50 × 20, 50 × 30, 75 × 20, and 75 × 30 cm) on growth and yield of corn. plant height and leaf production per plant were not influenced by the plant geometry. spacing, however, influenced leaf area, aboveground shoot biomass, and yield of corn per unit area. Highest leaf area, shoot biomass, and yield (8.2 t·ha-1) were produced by plants grown at 50 × 20 cm spacing. The results of this study suggest that narrow rows and plant to plant spacing may increase grain yield by increasing crop growth rates. plant geometry could be modified to improve yield of corn in the rice-corn cropping system, and thereby increase productivity of the system.

关键词： Row spacing plant to plant spacing Leaf Area Rice-Corn Cropping System

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