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1981～1990年在关中塿土进行了肥料定位试验的研究,结果表明:氮与磷或厩肥配施具有显著的增产作用,氮与厩肥配施产量高于氮磷配施。长期施用厩肥显著地提高了土壤有机质、全氮、全磷、碱解氮及有效磷等养分含量。施用化肥对土壤有机质和全氮含量无明显影响,但施用氮肥和磷肥分别显著地提高了土壤碱解氮和有效磷含量。
Fertilization experiment was conducted in Guanzhong Plain from 1981 to 1990. The results showed that nitrogen and phosphorus or manure had significant increase in yield, and the combination of nitrogen and manure was higher than that of nitrogen and phosphorus. Long-term application of manure significantly increased soil organic matter, total nitrogen, total phosphorus, available nitrogen and phosphorus and other nutrients. Fertilizer application had no significant effect on soil organic matter and total nitrogen content, but application of nitrogen fertilizer and phosphate fertilizer significantly increased soil available nitrogen and available phosphorus, respectively.