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盆栽和田间试验表明,当年种植草木樨可暂时使土壤养分减少,一旦翻压后,会使土壤肥力恢复和提高;油菜翻压后,土壤全氮,磷解氮,速效磷、脲酶活性均高于对照,土壤全磷、碱性磷酸酶活性反而减少。土壤肥力数值化综合指标也表明,绿肥腐解后,无论土壤肥力单项指标,还是综合指标也优于对照。因此,采用数值化综合指标能够全面地评价土壤肥力。
Potted plants and field experiments showed that the planting time of herbaceous plants could reduce the soil nutrient temporarily, and the soil fertility could be recovered and increased after the pressure was turned on. The activities of total nitrogen, phosphorus, nitrogen, available phosphorus and urease were all high In the control, soil total phosphorus, alkaline phosphatase activity instead decreased. The comprehensive index of soil fertility also shows that, after decomposing green manure, soil fertility single index, or comprehensive index is also better than the control. Therefore, a comprehensive assessment of soil fertility using numerical composite indicators can be carried out.