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通过多年在不同土壤上的试验结果表明:草甸黑土、黑土肥力高,增产潜力大,土壤提供玉米产量为88.6～96%;白浆化黑土和破皮黄肥力较低,增产潜力小,土壤提供玉米产量为60～70%;因此,培肥地力,提高土壤增产潜力对作物高产稳产有重要意义。氮肥施用量与产量相应,施量继续增加增产幅度下降。不同土质对氮肥的增产效果:草甸黑土和白浆土每公斤尿素增产玉米2～3公斤。黑土每公斤尿素增产玉米3.32～6.56公斤。以每亩施13.1公斤尿素最经济。施肥影响玉米单产诸因素中主要因素是氮肥、磷肥及氮磷配合施用,其次是农肥;三者单独效应是农肥大于磷肥大干氮肥,最佳组合为:农肥2000公斤,氮肥20公斤,磷肥15公斤。
Through years of experiments on different soils, the results showed that black soil and meadow black soil have high fertility and yield potential, and the yield of corn is 88.6-96%. White soil black soil and broken skin yellow soil have lower fertility, Corn yield is 60 ~ 70%; therefore, fertilizing soil fertility and increasing yield potential of soil are of great significance to the high and stable crop yield. Nitrogen fertilizer application rate and yield, application rate continues to increase yield decline. Different soil fertility increase effect on nitrogenous fertilizer: Meadow black soil and albic soil yield corn per kilogram of urea 2 ~ 3 kg. Black soil per kilogram of urea yield 3.32 ~ 6.56 kilograms of corn. 13.1 kg of urea per acre applied to the most economical. The main factors that affect the yield of maize were fertilization of nitrogen, phosphorus and nitrogen and phosphorus, followed by the application of fertilizer. The three effects of fertilizer alone were more than that of phosphate fertilizer. The best combination was: 2000 kg of fertilizer, 20 kg of nitrogen fertilizer, 15 kg of phosphate fertilizer kg.