CAJ | 학술논문

通过田间试验的方法得出半干旱地区在供试土壤条件下土壤有效养分在0～20cm时氮、磷肥都呈现出高低的不稳定性,在20～40cm时氮、磷肥的肥效及肥料利用率也比较低,说明在宁夏旱作农业区由于耕作层的深度不一致,土壤养分的空间差异性比较大.结果表明,在中壤黏土区,目标产量在200～300kg/666.7m2时建议施入氮肥35～45kg/666.7m2,施入磷肥40～50kg/666.7m2,同时在施肥过程中应增施有机肥,有机肥和化肥相结合,适当增加氮肥和磷肥,减少或者少施钾肥的原则.
통과전간시험적방법득출반간한지구재공시토양조건하토양유효양분재0～20cm시담、린비도정현출고저적불은정성,재20～40cm시담、린비적비효급비료이용솔야비교저,설명재저하한작농업구유우경작층적심도불일치,토양양분적공간차이성비교대.결과표명,재중양점토구,목표산량재200～300kg/666.7m2시건의시입담비35～45kg/666.7m2,시입린비40～50kg/666.7m2,동시재시비과정중응증시유궤비,유궤비화화비상결합,괄당증가담비화린비,감소혹자소시갑비적원칙.
This article through the method of field experiments that half dry area of the tested soil conditions in the soil nutrient effectively N P are presenting the instability of high and low in 0-20 cm, and the Nitrogen,Phosphate fertilizer utilization ratio and fertilizer applied are low in 20-40 cm. The sais dry land farming that the depth of the non-plough layer to differ in Ningxia, The soil nutrient space difference is bigger, Recommended in clay soil, goal 200-300 kg/666.7 m2 was recommended to production in the nitrogen 35-45 kg/666.7 m2 and Phosphate 40-50 kg/666.7 m2 , at the time should be followed the principle in the process： Add apply organic fertilizer, combined the organic and fertilizer, increasing nitrogen and Phosphate, reduce or less the potassium fertilizer.