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在行上覆膜、行间覆膜及不覆膜3种不同处理下,对大豆根系在0～20 cm土层的水平分布和距主茎0～15 cm范围的垂直分布进行了系统研究。结果表明,随着土层深度和离主茎距离的增加,根系干重、活力、活跃吸收面积明显减少;同时,宽行分布根系的干重、活力及活跃吸收面积均高于窄行分布的根系干重、活力及活跃吸收面积。不同覆膜方式对根系干重和活力的影响表现为:行间覆膜>行上覆膜>不覆膜;对根系活跃吸收面积的影响则表现为:行上覆膜>行间覆膜>不覆膜。
The results showed that the horizontal distribution of soybean roots in 0 ~ 20 cm soil layer and the vertical distribution of 0 ~ 15 cm away from the main stem were systematically studied under the three treatments of film mulching, intercropping and no mulching. The results showed that the root dry weight, vigor and active absorption area decreased obviously with the depth of soil layer and the distance from the main stem. At the same time, the dry weight, vigor and active absorption area of the root system with wide row distribution were higher than those with narrow row distribution Root dry weight, vitality and active absorption area. The effects of different film mulching methods on the dry weight and vigor of roots were as follows: interline> overhang> not covered; the influence on the active absorption area of the root showed as follows: Not covered.