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在河谷地区细砂质轻壤土上观测三种不同复种制对土壤物理性质影响的试验表明,麦稻豆制土壤结构水稳性比麦稻稻和油稻稻制强,土壤对作物根系伸展的阻力小,土壤供水能力强;麦稻稻制土壤结构差,供水能力弱.早稻产量麦稻稻制显著低于麦稻豆和油稻稻制;5年后土壤有机质含量以油稻稻制高,麦稻稻制低.
Experiments on the effects of three different double cropping systems on the physical properties of soils on fine sandy loam in the valley showed that the soil structure of wheatgrass was more water-stable than that of the wild rice and oil-paddy rice and that of the soil Low resistance and strong soil water supply ability.The soil structure of rice was poor and the water supply capacity was weak.The yield of early rice was significantly lower than that of wheat and pea and rice.The content of soil organic matter Wheat low rice.