隔根和种植模式对玉米豌豆群体的根分布及豌豆根瘤的影响

Effects of root partition and planting patterns on the roots distribution of maize and pea population and nodulation of pea root

为了探究根系分布规律以及结瘤的特征,采用3种种植模式和3种隔根方式对玉米(Zea mays)间作豌豆(Pisum sativum)群体的根分布以及豌豆瘤质量、瘤数进行研究。结果表明,间作玉米和豌豆单株根干质量大于单作的根干质量,同时在豌豆和玉米共生阶段二者根垂直分布层次有明显差异;在玉米豌豆间作体系中,无分隔处理的豌豆根瘤数目和根瘤质量高于塑料膜分隔处理,分别高出29.63%和48.21%;间作无隔根和尼龙网隔根的豌豆根瘤质量、瘤数也分别高于单作豌豆。在同一间作体系中,种间根系相互作用越强,越有利于豌豆根瘤的产生。

Three planting pattern and three root partition barriers were used to investigate the root distribution of maize and pea population and nodulation of pea root.This study showed that the root weight of intercropping maize and peas was significantly bigger than that of monoculture maize and their root distributions also were different.In the intercropping system of maize and peas,the nodulation number and weight of pea root without partition barrier was bigger than those of pea root with partition barrier,and increased by 29.63% and 48.21%.The nodulation weight of pea root without root partition barrier and with partition barrier using nylon was bigger than that of monoculture maize.In the same intercropping system,the increasingly strong competition among root system increased the nodulation number.