【摘要】 应用大田定位试验方法,研究了连续4年施用不同类型有机肥后,土壤剖面中有机碳和易氧化有机碳的分布特征,并与相应的重金属含量进行了相关性分析。结果表明:连续4年施用不同类型有机肥后,土壤剖面中有机碳、易氧化有机碳主要累积在0～15 cm土层,其含量随土层深度的增加而降低。施用高量鸡粪时,有机碳可迁移到15～30 cm土层,易氧化有机碳可迁移到60～90 cm土层;施用猪粪和污泥时,有机碳均未发生明显的迁移现象,但高施用量处理下易氧化有机碳可迁移至60～90 cm土层。施用猪粪和污泥后,土壤剖面各层中易氧化有机碳占总有机碳的比例显著增加,且均高于施用鸡粪。施用不同有机肥后土壤剖面中有机碳、易氧化有机碳分布和Cu、Zn、Cd具有显著正相关。更多还原

【Abstract】 A field positioning experiment was conducted to examine the distribution of organic carbon and easily oxidized organic carbon,and their correlation with the concentrations of heavy metals in soil profile after four years continuous application of three different kinds of organic fertilizers. The results showed that after applying organic fertilizers,organic carbon and easily oxidized carbon mainly accumulated in the 0-15 cm soil layer,and their concentrations decreased with increasing soil depth. When high amount of chicken manure was applied,organic carbon could migrate to the 15-30 cm soil layer,and easily oxidized organic carbon could migrate to the60-90 cm soil layer. Organic carbon didn’t significantly migrate when pig manure and sludge were applied,while easily oxidized organic carbon migrated to the 60-90 cm soil layer under high amount application of pig manure and sludge. The proportion of oxidized organic carbon to total organic carbon was much higher in the treatments of pig and sludge manure application as compared to chicken manure. There was a significant positive correlation between the distribution of organic carbon and easily oxidized organic carbon and Cu,Zn and Cd in the soil profile after application of different organic fertilizers.更多还原