不同施肥制度下褐土微团聚体有机碳活性变化  

Changes of Organic Carbon Activity in Cinnamon Soil Micro-aggregates Under Different Fertilization Regimes

作　　者：韩志卿[1] 张电学[1] 王秋兵[2] 陈洪斌[1] 常连生[1] 于玉桥[1] 刘东强[1] 

机构地区：[1]河北科技师范学院农学系,河北昌黎066600 [2]沈阳农业大学土地与环境学院,沈阳110161

出　　处：《水土保持学报》2008年第4期138-142,共5页Journal of Soil and Water Conservation

基　　金：科技部"十一五"科技支撑计划重大项目(2006BAD02A08-9);河北省科技厅"十一五"科技攻关计划项目(06220103D);河北科技师范学院博士基金资助项目(2007YB011)

摘　　要：通过8年田间定位试验．研究了不同施肥制度下褐土及其微团聚体有机碳活性变化规律。结果表明，褐土微团聚体有机碳活性随粒级的减小而增强，不同施肥制度下土壤微团聚体组成变化各异，不施肥主要是由于10～50μm粒级总有机碳和〈10／lm粒级易氧化有机碳储量减少而造成土壤有机碳活性降低，土壤肥力下降；单施常量NPK化肥处理呈同样的趋势；增量NPK化肥可保持有机碳活性和肥力不降低，但投入较高；有机肥（物）料配施常量NPK化肥主要是通过增加大粒级特别是10～50μm粒级总有机碳和易氧化有机碳储量而使有机碳活性和土壤肥力水平得到提高。采用有机肥（物）料配施常量NPK化肥是改善褐土肥力的有效措施。Eight years＇ location experiment was conducted in cinnamon soil in Hebei province to study the changes of organic carbon activity in soil and its micro-aggregates. The results showed that with the size of micro-aggregates decreased,organic carbon activity in cinnamon soil micro-aggregates is increased. The composition of soil micro-aggregates is different under different fertilization regimes. No fertilization and application the constant NPK fertilizers mainly decrease the storage of total organic carbon in 10-50 μm and readily oxidizable organic carbon in 〈10 μm,and result in soil organic carbon activity and fertility decrease. Application the increment NPK fertilizers can maintain the soil fertility, but the input is high. Application organic manure combined with constant NPK fertilizers mainly increases the storage of total organic carbon and readily oxidizable organic carbon in bigger sizes, especially in 10-50 μm micro-aggregates, and improves soil organic carbon activity and fertility. And it is the most effective way to improve soil fertility.

关 键 词：施肥制度 褐土 微团聚体 有机碳活性 Kos 储量 

分 类 号：S158.5[农业科学—土壤学]