The balance analysis results of soil nutrient indicated that the fertilization methods of cropland management in Chengdu Plain were firming nitrogen, controlling phosphorus and increasing potassium.

土壤养分的平衡分析结果表明，成都平原耕地土壤管理宜采取“稳氮、控磷、增钾”的施肥方法和严格控制各种点源和非点源污染物进入土壤。

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But under low phosphorous stress longer, contrast had suppressed the growth of the root because of in the out-of-balance state of nutrition for a long timing, which obviously in low phosphorus soil.

但随着胁迫时间的延长，对照由于长期处于营养失衡状态，抑制了根系的生长，这一点在低磷土壤上表现明显。

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