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本文以1983～1989年在黄绵土上所做田间试验结果和室内分析资料为依据,详细讨论了施用不同肥料(氮、磷、氮磷、有机肥、有机肥+磷、有机肥+氮,有机肥+氮磷),对玉米、谷子、糜子、荞麦等作物的产量及其经济效益;植株对肥料的利用率;土壤养分含量的变化;肥料种类与籽粒品质等的影响。指出,在这一水土流失严重地区,应十分重视增施有机肥,切忌化肥单施,实行氮磷肥配合施用;磷肥效果明显高于氮肥,建议解决磷肥供应不足问题。在目前有机肥,化肥均感不足情况下,应优先提供玉米对肥料的需要,其次为谷子。
Based on field experiments and laboratory analysis conducted on loessial soil from 1983 to 1989, the effects of different fertilizers (nitrogen, phosphorus, nitrogen and phosphorus, organic fertilizer, organic fertilizer + phosphorus, organic fertilizer + nitrogen and organic fertilizer + Nitrogen and phosphorus) on the yield and economic benefits of crops such as corn, millet, millet and buckwheat; the utilization rate of plants to fertilizers; the changes of soil nutrient contents; the types of fertilizers and the grain quality. Pointed out that in this area of serious soil erosion, should attach great importance to the application of organic fertilizer, avoid single application of chemical fertilizers, the implementation of nitrogen and phosphorus with the application; phosphate fertilizer was significantly higher than nitrogen, it is recommended to solve the problem of insufficient supply of phosphate fertilizer. In the current organic fertilizer, fertilizer are not enough cases, should give priority to the need for fertilizer on corn, followed by millet.