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大豆根系和冠部的生长量动态均呈“S”曲线78％的根系集中于地表以下0—20cm和植株四周0—5 cm的土体内。根量从地表向下依土层深度、从植株向外依侧向距离呈半对数函数曲线下降。调节种植密度和施用化学肥料可促控大豆根系和整株的生长。
Soybean root and crown growth trends were “S” curve 78% of the roots concentrated in the soil below 0-20cm and 0-5cm soil around the plant. According to the depth of soil layer, the amount of root decreased from the surface to the ground, and the curve of logarithm function decreased from the outside of the plant to the outside. Adjusting the planting density and applying chemical fertilizers can promote the growth of soybean root and whole plant.