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用连续栽培十季作物的化肥定位试验地的石灰性黄潮土,进行盆栽试验.结果表明,供试土壤肥力差异明显,以致使化肥效应不一.CK±的N、P不足,施用N肥后产量大增;N±的P不足,施N肥后仅增产20%,施P肥后增产141.2%;NP±的P充足,施P肥无效,施N肥后小麦、水稻增产67.1%和178.7%,K肥对小麦也有增产效果;NPK±的P、K充足,P肥效果不明显,K肥在水稻上有减产趋势,N肥对水稻增产129.6%,小麦增产72.7%.因此在生产上必须根据土壤养分肥力特性,合理分配和施用化肥,以达作物增产,化肥增效和培肥土壤的目的.
Pot experiments were carried out on calcareous yellow soil with chemical fertilizers that were continuously cultivated for ten seasons, and the results showed that there were significant differences in soil fertility between the two treatments, resulting in different effects of chemical fertilizers. N ± P deficiency, yield increased only 20% after application of N fertilizer, yield increased 141.2% after application of P fertilizer; NP ± P sufficient, P fertilizer ineffective, fertilization of wheat, rice yield 67.1% and 178.7% , K fertilizer also has the effect of increasing yield of wheat; NPK ± P, K sufficient, P fertilizer effect is not obvious, K fertilizer yield reduction trend in rice, N fertilizer yield 129.6% of rice, wheat yield 72.7% .Therefore, in production must According to the characteristics of soil nutrient fertility, the rational distribution and application of fertilizers to achieve crop yield, fertilizer efficiency and soil fertility purposes.