论文部分内容阅读
在山西省东山丘陵区褐土性土壤上，经过３年旱地玉米地膜覆盖下多点肥料试验，得出了氮、磷和有机肥三因子综合肥料效应方程，并由此求得旱地覆膜玉米经济施肥量为纯Ｎ９．１８ｋｇ，Ｐ２Ｏ５４．３３ｋｇ，施肥效益为３４．２３元／亩。在该地区条件下，覆膜玉米增施氮、磷肥和有机肥均有明显的增产效果，而氮肥尤为突出，施氮可促进磷肥和有机肥增产效果。经转换求得包含土壤肥力变异的经济施肥量的预算计算式。最后建议该地区旱地覆膜玉米应注重氮肥投入，氮磷肥适宜配比为１：０．４７，有机肥增产效应不突出，可视具体情况而定。
In the tillage soil of Dongshan hilly region in Shanxi Province, after three years of multi-point fertilizer experiment on maize mulch, the three-factor comprehensive fertilizer effect equation of nitrogen, phosphorus and organic fertilizer was obtained, Economic fertilizer amount of pure N9.18kg, P2O54.33kg, fertilizer efficiency of 34.23 yuan / mu. Under the conditions of this region, the increase of N fertilizer, phosphate fertilizer and organic fertilizer had significant effects on yield increase, while nitrogen fertilizer was more prominent. N application could promote the yield increase of phosphate fertilizer and organic fertilizer. Converted to calculate the economic fertilization amount containing soil fertility variation budget formula. Finally, it is suggested that the dryland covered maize in this area should pay attention to the input of nitrogenous fertilizer, the suitable proportion of nitrogenous and phosphate fertilizers is 1: 0.47, and the yield increase of organic fertilizer is not prominent, depending on the specific circumstances.