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1987、1988年分别在棕壤和潮棕壤农田上设置微区试验和田间试验。结果表明,有机肥料配施化肥可提高土壤有机质含量,农作物产量亦较等养分量化肥要高;施用有机肥可增加土壤中活性有机质的数量和富里酸含量,降低胡敏酸的芳构化程度,增加其活化度;有机肥料配施化肥可增加土壤的生物活性,有些酶活性可提高一倍以上,而单施化肥则使几种酶活性下降3～11％。如从土壤有机质含量、品质和酶活性指标来看,均以未腐熟的玉米秸秆的效果最佳。
In 1987 and 1988, micro-area and field experiments were set up on brown soil and brown soil farmland respectively. The results showed that organic fertilizers combined with chemical fertilizers could increase soil organic matter content and crop yield higher than that of equal nutrient fertilizers. Organic manure could increase the amount of active organic matter and fulvic acid in soil, and decrease the degree of aromatization of humic acid , Increase their activation degree; organic fertilizer with fertilizer can increase the biological activity of the soil, some of the enzyme activity can be more than doubled, while the application of chemical fertilizers, while the activity of several enzymes decreased by 3 to 11%. As from the content of soil organic matter, quality and enzyme activity indicators, are not decomposed corn stalks best.