The population root activity of interplanting cotton decreased significantly at the square and boll stage, with the high value period delayed 15 to 25 days.
套作棉花在蕾铃期群体根系活力降低，且根系活力高值期出现的时间后延15 ~ 25天，高值持续期明显缩短。
The growth of root was restrained and activity of root decreased under severe water stress ( water content of soil is 35% the content of field holding water).
但重度水分胁迫（土壤含水量为田间持水量的35％）抑制根系的生长，根系活力下降；
In the rape root, the activity of peroxidase (POD) decreased with the rising of iron concentration.
在油菜根中，过氧化物酶(pod)活性随供铁浓度的提高而降低。
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