长期施用化肥与有机肥对土壤肥力影响的回归分析

Regression analysis for the effects of successive application of chemical and orgnic fertilizer on soil fertility:

本文对１９８５～１９９４年持续２７季稻－稻－麦轮作制下不同氮、磷、钾化肥和有机肥用量定位试验中２０个不同施肥处理土壤作了肥力测定，采用回归分析法研究了长期施用化肥及有机肥对土壤肥力的影响。结果表明：长期施用有机肥能显著或极显著地提高土壤有机质含量，氮、磷全量及速效氮、磷、钾含量；化肥中除氮肥对土壤有机质及氮、磷、钾养分影响不显著外，磷肥能极显著地提高土壤全磷及速效磷含量，而钾肥能极显著地提高土壤速效钾含量。

The effects of chemical nitrogen, phosphorus and potassium fertilizer and manure on soil fertility were investigated in a long-term fertilizer experiment for 27 seasons during ten years from 1985 to 1994 in a rice-rice-wheat rotation system The results from regression analysis indicated that the organic fertilizer significantly increased soil organic matter, both of total N, P and available N, P, K; Application of P fertilizer was beneficial for the increase in soil total and available P levels; K fertilizer could increase soil available K level, but not total K level No significant effects of N fertilizer on soil fertility levels was found