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对棕黄士长期定位试验三组十二个处理的土样进行有机质含量、结合形态等项分析,并研究它们对土壤理化性质的影响.单施氮肥的六年粮豆总产量高于无肥处理,但有机质仅为对照的91.8—93.8%,结合态有机质下降0.02—0.06%,松结态腐殖质含量相当于无肥处理的95—98%,供氮能力恶化,阳离子交换量降低.施用有机肥料能收到较好的培肥效果.氮肥与有机肥配合施用时,可缓和土壤性质恶化的趋势,如H、P、K化肥与有机肥配合施用则既能增产又能改善土壤性质.
The effects of organic matter content and combination morphology on the physical and chemical properties of soil were studied for three groups of twelve soil samples treated with long-term positioning test. Treatment, but the organic matter was only 91.8-93.8% of the control, the bound organic matter decreased by 0.02-0.06%, the loosely coupled humus content was 95-98% of the no-fertilizer treatment, the nitrogen availability deteriorated and the cation exchange capacity decreased. Fertilizer can receive better fertilizer effect.Compound application of nitrogen fertilizer and organic fertilizer can alleviate the trend of soil properties deterioration, such as H, P, K fertilizer and organic fertilizer with the application of both yield and improve soil properties.