长期施肥对黑土有机质及其组成的影响

以农业部哈尔滨黑土生态环境重点野外科学观测试验站长期定位试验为平台,研究了长期施肥对黑土有机质的影响.结果表明,长期施用不同肥料对土壤有机质含量的影响有较大差异,有机无机肥配合处理＞有机肥处理＞无机肥处理＞无肥处理.长期施肥对深层土壤有机质含量也有影响,施用有机肥作用尤其明显,并随着土层的加深施肥对土壤有机质含量的影响呈下降趋势.施用有机肥对有机质不同密度组分影响很大,对有机质含量增加最有效,而施用无机肥则有机质含量有所降低.

Effect of fertilization on organic matter and its composition in mollisols

Long-term fertilization trial was conducted to study the effect of various fertilizer application on organic matter of the black soil.The results showed that the long term effects of fertilization on soil organic matter were different,dealing with the application of organic and inorganic fertilizer>organic fertilizer>inorganic fertilizer treatment>no fertilizer treatment.The long term fertilization also affected the organic matter of deeper soil.The role of organic manure was particularly evident,and effects of fertilization on soil organic matter content showed a downward trend with the deepening of soil.Organic fertilizer on organic matter of different densities content increased in the most effective,while the application of inorganic fertilizer reduced organic matter content.