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黑土肥力和肥料效益定位监测采用裂区设计，主区为有机肥，副区为无机肥，计２４区。１４年（１９８０—１９９３）试验结果表明，单施化肥区和无肥区，土壤耕层有机质呈缓慢下降趋势，年公顷有机质矿化量为２７０—４８０公斤。有机无机肥配合施用，耕层有机质呈增加趋势，年公顷有机质生成量为４２０—６４０公斤，并有利于土壤活性有机质的增加，有利于增加土壤养分的贮备和供应强度，与单施化肥区比，土壤氮磷钾养分增加５—２８％，土壤物理性状趋于好转，总孔隙度、田间持水孔隙、通气孔隙增加４—２２％，容重下降１０—２２％。土壤微团聚体发育良好，呈松散柔和的絮状分布。土壤生化性状趋向改善，蔗糖酶、脲酶、磷酸酶增加２５—１２４％，微生物总量高８—２７％。玉米高产稳产、公顷产玉米１４年平均为８２００—８８００公斤，比单施化肥区提高１０％左右。籽粒蛋白质和必需氨基酸含量也有所提高。公顷施优质有机肥３０吨，配施Ｎ１５０公斤，玉米产量达８２００公斤，比较经济有效。
Black soil fertility and fertilizer benefit positioning monitoring using split design, the main area for organic fertilizer, deputy area for inorganic fertilizer, total 24 area. The result of 14 years (1980-1993) showed that the organic matter in topsoil decreased slowly with the application of chemical fertilizers and no fertilizers. The annual mineralization of organic matter was 270-480 kg. With organic and inorganic fertilizers, the organic matter in topsoil showed an increasing trend. The annual organic matter yield was 420-640 kg and was conducive to the increase of soil active organic matter, which was beneficial to increase the storage and supply intensity of soil nutrients, The soil N, P and K nutrients increased 5-28%, soil physical properties tended to improve, the total porosity, field holding pores, aeration pores increased 4-22%, bulk density decreased 10-22%. Soil microaggregates developed well, showing loose and soft flocculent distribution. Soil biochemical traits tended to improve. Sucrase, urease and phosphatase increased by 25-124% and total microbial biomass by 8-27%. High and stable yield of corn, hectare of corn production in 14 years, an average of 8200-8800 kg, than the single fertilizer area increased by about 10%. Grain protein and essential amino acids also increased. Hectare of high quality organic fertilizer 30 tons, with N150 kg, corn yield 8200 kg, more economical and effective.