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通过连续 8年在全省 5个生态区 9个 9区固定轮作场圃综合试验 ,试验区专项研究 ,框区、盆栽试验 ,实验室分析 ,以及大量的大面积生产调查 ,发现大豆重迎茬种植 ,土壤水分有一些不利的变化 ,但其程度低于重茬玉米、重茬小麦 ,某些时期重茬大豆耕层土壤的水分含量还会高于正茬轮作。这说明土壤水分没有明显恶化 ,不是造成大豆重迎茬减产的一个重要原因。
Through 8 consecutive years in the five ecological zones of the province nine 9 fixed-wheel field farms comprehensive test, special experimental area, box area, potted plants, laboratory analysis, and a large number of large-scale production survey found that soybean replanting There are some unfavorable changes in planting and soil moisture, but they are lower than those of stubble corn and stubble wheat. In some periods, the soil moisture content of stubble soils will be higher than that of stubble rotation. This shows that no significant deterioration of soil moisture, not caused by heavy cropping a major reason for the reduction of yield.