上海交通大学闵行校区土壤磷的生物可利用性评价-上海交通大学环境.PDF

g n i r e e n i g n E d n a s e c n e i c S l a t 上海交通大学闵行校区 n e m n o r i 土壤磷的生物可利用性评价 v n E f o l o o h c S 院 学 程 工 与 学 科 境 谭北慧 环 2011-12-25 上海交通大学闵行校区 土壤磷的生物可利用性评价 谭北慧 Tan Beihui 环境科学与工程学院 School of Environmental Science and Technology 摘要 磷是植物必需的大量元素之一，其主要来源为土壤。人们一般通过施用磷肥的 方法来解决土壤提供磷素不能满足植物生长需要的问题,但施入土壤中的磷肥生物可 利用量甚至不足 30% ，有相当大的部分磷肥被土壤固定，进而转化为土壤磷库的一 部分。本实验选取了上海交大闵行校区四个地区的土壤样品，分析测试了总磷含 量，并按照酸性土壤磷的分级提取测试了其 Al-P ，Fe-P 的含量，最后对其进行分析。 综合来看，校园中的有施肥记录的农田土样，不仅总磷含量高，而且可生物利用性磷 的相对含量也要比绿化带土壤样品比例高。 关键词：总磷 Al-P Fe-P ABSTRACT Phosphorus is one kind of major elements which are necessary for plants, one of its main sources is soil. It is generally through applicating phosphate fertilizer to solve the problem the phosphate provided by soil can not meet the needs of plant growth. But less than 30% in the totle phosphorus applied to soil are bioavailable. There is a large part of the soil phosphorus is fixed, and then into part of soil phosphorus pools. In this study, four regions of the soil sample are selected from Minhang campus of Shanghai Jiaotong University.We testing of the total phosphorus content, and in accordance with the classification of acid extraction of soil P ,we also test of its Al-P, Fe-P, and finally analyze. According to the comprehensive analysis of the experimental results , the total phosphorus content of the agricultural soil which has record of use