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研究了土壤供肥能力与施肥对水稻产量的影响，结果表明，沈阳市郊区的壤质草甸稻田土的供肥能力大约为氮９８．４ｋｇ／ｈｍ２，磷９４．９５ｋｇ／ｈｍ２，钾１４２．０５ｋｇ／ｈｍ２。施用化肥可明显增加稻谷产量，但不同化肥的增产效果不同，在肥料三要素中，仍然以氮肥的增产效果最大，磷肥次之，钾肥最小。氮肥效果主要表现在提高穗数和穗粒数，对千粒重和结实率的影响相对较小。在不施化肥情况下，单纯施用农肥亦可获得较高产量，农肥的增产作用与农肥供氮能力和利用率有关。
The effects of soil fertility and fertilization on the yield of rice were studied. The results showed that the soil available fertility of loamy paddy soil in Shenyang suburb was about 98.4kg / hm2, 94.95kg / hm2, and potassium 142. 05kg / hm2. The application of chemical fertilizers can obviously increase the yield of rice, but the yield of different chemical fertilizers is different. Among the three elements of fertilizers, the yield increase of nitrogen fertilizers is still the largest, followed by phosphate fertilizers and potassium fertilizers. The main effect of nitrogen fertilizer is to increase the number of spikes and grains per spike, which has a relatively small effect on 1000-grain weight and seed setting rate. In the case of no fertilizer application, simple application of agricultural fertilizer can also be obtained higher yield, the role of agricultural production of fertilizer and nitrogen fertilizer capacity and utilization.