组合施肥技术对黑土肥力影响的研究

采取定位试验的方法研究了组合施肥技术对土壤有机质、氮、磷的影响。结果表明,组合施肥较单施化肥土壤有机质含量增加1.8～3.3g/kg;土壤全氮增加0.05g/kg,速效氮(除Ⅱ处理外)增加6.6～44.6mg/kg;土壤全磷增加0.15～0.29g/kg.速效磷增加15.68～37.21mg/kg。土壤有机质增量为0.6～23g/kg;土壤氮素增量全氮增加0.002～0.25g/kg,速效氮增加11.6～39.4mg/kg;土壤磷素增量全磷增加0.09～0.24g/kg,速效磷增加23.59～57.28mg/kg。在保持土壤肥力有所提高的情况下,玉米大豆两年平均产量提高7.7％～17.3％,净收入提高19.4％～37.3％,由此可见,组合施肥技术应用前景广阔。

Effect of combined fertilizers application techniques on the black soil fertility

This study determined the effect of combined fertilizers application techniques on the main elements of the soil fertility - organic matter, nitrogen and phosphorus in the positioned experiment. The results indicated that the treatment of combined fertilizers compared with single chemical fertilizer, soil organic matter content increased 1.8-3.3 g/kg; soil fall nitrogen content increased 0.05 g/kg, rapidly available nitrogen increased 6.6-44.6 mg/kg; soil full phosphorus content increased 0.15-0.29 g/kg, rapidly available phosphorus increased 15.68-37.21 mg/kg. The recruitment of soil organic matter was 0.6-23 g/kg; the increments of soil full nitrogen and rapidly available nitrogen were 0.02-0.25 g/kg and 11.6-39.4 mg/kg, respectively, and the increments of soil full phosphorus and rapidly available phosphorus were 0.09-0.24 g/kg and 23.59-57.28 mg/kg, respectively. Under the condition of keep in the soil fertility increase, average yield of corn and soybean grown up 7.7%-17.3% for two years, the ret income increased 19.4%-37.3%. Therefore, The great future in utilization of the techniques of combined fertilizers application.