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根据长武县旱塬地小麦连作长期定位试验研究,耕作和长期单施化肥可以维持土壤有机质水平,但加速了土壤腐殖质的老化,影响了胡敏酸和富里酸间的相互转化和土壤中有效养分的利用。化肥种类和施用量的不同其影响结果也不相同,单施磷肥对土壤培肥作用不明显,单施氮肥则能达到增加土壤肥力的效果,施用量愈大,效果愈明显。
According to long-term experimental study on continuous cropping of wheat in upland of Changwu County, tillage and long-term single application of chemical fertilizer can maintain the level of soil organic matter, but accelerate the aging of soil humus and affect the mutual transformation between humic acid and fulvic acid and the effective soil Use of nutrients. The results of different types and amount of chemical fertilizers are not the same. The effect of phosphate fertilizer alone on soil fertility is not obvious. The effect of fertilizing nitrogen fertilizer alone on soil fertility can be achieved. The greater the application amount, the more obvious the effect is.