消极平衡
The nitrogen circulation is positive equilibrium, the phosphorus and potassium circulation are all negative equilibrium and becoming worse in farmland material circulation.
农田物质循环中氮素为正平衡,磷钾素均为负平衡并在加剧;
In AAM series a nitrogen equilibrium was reached while in PRH series was a negative equilibrium.
AAM组术后可达到氮平衡,而PRH组为负平衡。
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