长期定位施肥对土壤重金属含量的影响  

Effects of Long-term Located Fertilization on Heavy-metal Content of Soil

作　　者：任顺荣[1] 邵玉翠[1] 高宝岩[1] 王德芳[1] 

机构地区：[1]天津市农业科学院土壤肥料研究所,天津300192

出　　处：《水土保持学报》2005年第4期96-99,共4页Journal of Soil and Water Conservation

基　　金：天津市科技攻关项目(91120803010);天津市财政局资助项目

摘　　要：在25年长期定位试验研究基础上,分析了无肥、N、NP、NPK、N+有机肥和N+秸秆6个不同施肥处理的0～20 cm土壤重金属Cu、Zn、Cd、Cr、Hg和As的含量变化.结果表明:6种元素含量都呈现增加趋势.N+有机肥处理的Zn含量超过土壤环境质量标准2级(pH6.5～7.5)的限界,Hg含量增加幅度较大,比试验基础值增加了114%.单施N肥(尿素)对土壤重金属影响不大,施用P肥使土壤重金属含量增加.垃圾或畜禽排泄物为原料的有机肥,可使土壤重金属含量提高,特别是Cu、Zn、Hg增加幅度较大.对垃圾或畜禽排泄物为原料的有机肥也要合理施用,施肥是影响土壤重金属含量变化的重要因素之一.On the basis of 25-year study on long-term located experiments of fertilizer,analysis is made on he change tendency of heavy-metal content in soil of 0-20 cm which are treatd with six different fertilization trails detailed as fertilizing by N, NP, NPK, N＋organic fertilizer, N＋straw and no fertilizer. The result states that ： All 6 elements present trend of increasing. The Zn content of the soil with N＋ organic fertilizer processed, which exceeds the limit of the Soil Environmental Quality Standard II, Hg content increased massively, 114% increased than the testing foundational value. No weighty effect to the soil only N fertilizer （urea） used, use P fertilizer shall increase the heavy-metal content of the soil. The organic fertilizer, which takes rejected materials of livestock and poultry as raw materials, shall increase the heavy-metal content of the soil, Cu, Zn and Hg increased especially. The organic fertilizer, which takes rejected materials of livestock and poultry as raw materials, should be used reasonably, fertilization is an important reason to effect the change of heavy-metal in soil.

关 键 词：长期定位施肥 潮土 重金属 

分 类 号：S147.2[农业科学—肥料学] X131.3[农业科学—农业基础科学]