不同施肥制度对褐土及其微团聚体磷素肥力的影响  

Effect of Different Fertilizer Regimes on Phosphorus Fertility in Cinnamon Soil and Its Micro-aggregates

作　　者：张电学[1] 韩志卿[1] 王秋兵[2] 吴素霞[1] 常连生[1] 谢新宇[1] 杨会民[1] 

机构地区：[1]河北科技师范学院生命科技学院,河北昌黎066600 [2]沈阳农业大学土地与环境学院,辽宁沈阳110866

出　　处：《土壤通报》2011年第6期1451-1456,共6页Chinese Journal of Soil Science

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-5);河北科技师范学院博士基金项目(2007YB011)资助

摘　　要：通过8年定位试验,研究了不同施肥制度下褐土及其微团聚体磷素肥力变化规律,从各级微团聚体全磷和有效磷储量角度探讨了不同施肥制度下土壤磷素肥力的变化实质。结果表明,不施肥处理主要是由于10～50μm粒级全磷储量和<10μm粒级有效磷储量减少而造成土壤磷素肥力下降;单施常量NPK化肥和增量NPK化肥处理主要通过提高<10μm粒级全磷和有效磷储量增加土壤磷素含量;有机肥(物)料配施常量NPK化肥处理则在提高小粒级微团聚体磷素贮备和供应能力的同时,增强了大粒级特别是10～50μm粒级全磷和有效磷储量,进而使土壤磷素肥力得到提高。采用有机肥(物)料配施常量NPK化肥是改善土壤磷素肥力的有效措施。Eight years＇ location experiment was conducted in cinnamon soil in Hebei province to study the changes of phosphorus fertility in soil and its micro-aggregates,and to study the changes of the soil phosphorus fertility under different fertilizer regimes from the view points of the storage of total P and available P in various micro-aggregates.The results showed that no fertilization mainly decreased the storage of total P in 10-50 μm and available P in 10 μm micro-aggregates,and resulted in soil phosphorus fertility decrease.Application of the constant and the increment NPK fertilizers mainly increased the storage of total P and available P in 10 μm.Application of organic manure combined with usual NPK enhanced the storage of total P and available P in bigger sizes,especially in 10-50 μm micro-aggregates,and improved soil phosphorus fertility,which was the most effective way to improve soil phosphorus fertility.

关 键 词：施肥制度 褐土 微团聚体 全磷 有效磷 

分 类 号：S158.5[农业科学—土壤学]