长期定位施用不同种类有机肥对作物产量及潮土理化性状的影响

Effect of the Long-term Different Organic Fertilizer Applications on Crop Yield and Soil Properties

进行了25a(1979～2005年)的不同种类有机肥料的长期定位试验研究。结果表明:等氮等磷条件下,不同有机物料处理间的小麦和玉米产量差异不显著,但与CK比较均达到了极显著水平;不施肥的土壤有机质平均含量最低,其次为单独施用化肥,但比CK高3.7%,与秸秆和绿肥配合化肥处理间差异不明显;从松结态和稳结态腐殖质与紧结态腐殖质的比值看,以单施化肥最高(0.898),而施用有机物料后比值均有所降低;单独施用化肥处理的胡敏酸含量最高;增施有机物料特别是有机无机结合,可以增加土壤微团聚体的团聚度和团聚水平。

The allocated long-term experiment with different organic fertilizers has been conducted since 1979. The results showed： there was no significant difference on annual crop yield among the different fertilizer applications, except no fertilizer application （CK） . The soil organic matter was similar with cake, straw and false indigo leaves applications. And they were higher than the chemical fertilizer application and CK. The organic matter was 3.7% high than CK. The tight status humus with the chemical fertilizer application and CK was higher than other 3 organic fertilizer applications. Increasing organic fertilizer amount could improve soilmicro-structure.