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利用钻土法及根系扫描分析系统研究不同产量类型大豆R5期根系在植株周围、株间及垄间土壤中的空间分布特征。结果表明:高产类型大豆根冠比较高,而且单位根长、根表面积的地上部干物质较高。根干重不仅在根系较集中的植株周围及株间0~30 cm的土层,而且在较深的土层(>30 cm)中都有较多的分布;根长在植株周围的0~45 cm土层范围内表现出一定的优势。直径小于1.0 mm的细根形成了根系的主要部分,根长差异的主要原因不是细根比例的大小,而是细根数量的多少。除株间0~15 cm土层外,高产大豆各土层的根/土体积比较高。
The rhizobox and root scanning analysis system was used to study the spatial distribution characteristics of root system R5 in different yield types of soybean in the soil around, between and among the plants. The results showed that the root crown of high-yielding type soybean was relatively high, and the above-ground dry matter was higher in root length and root surface area. Root dry weight was found not only around the plants with more concentrated root systems but also between 0 ~ 30 cm soil layer and between deeper layers (> 30 cm) 45 cm soil layer shows some advantages. Fine roots with diameters less than 1.0 mm form the major part of the root system. The main reason for the difference in root length is not the size of fine roots, but the number of fine roots. Except for 0 ~ 15 cm soil layer, the root / soil volume ratio of high yield soybean soil was higher.