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不同施肥条件下旱地红壤磷素固定及影响因素的研究
引用本文:杨芳,何园球,李成亮,王艳玲,林天.不同施肥条件下旱地红壤磷素固定及影响因素的研究[J].土壤学报,2006,43(2):267-272.
作者姓名:杨芳  何园球  李成亮  王艳玲  林天
作者单位:中国科学院南京土壤研究所,南京,210008
基金项目:中国科学院知识创新工程项目;科技部科研项目
摘    要:以Langmuir曲线测出的Xm值(最大吸磷量)为指标,对不同施肥条件下红壤旱地土壤的吸磷能力变化特征及影响磷素吸附的主要因素进行了研究。结果表明:施用磷肥能显著降低土壤的最大吸磷量,其中。施用厩肥的土壤Xm值最小。有机质是影响土壤吸磷能力的一个重要因素,随着有机质含量的升高,土壤吸磷能力减小;活性铝也是影响磷素吸附的重要因素,随活性铝含量增加,磷素吸附能力增加;活性铁的影响不显著;pH对红壤旱地吸磷能力影响也不显著。通过因子分析得到,有机质含量对土壤吸附磷素的能力影响最大。在生产上,磷素最大吸附量Xm值可以作为初步判断土壤需施磷肥量大小的依据。这些可为红壤地及的褴毒施用研有档供理论依据和实践指导。

关 键 词:红壤旱地  不同施肥条件  磷素吸附  影响因素
收稿时间:12 29 2004 12:00AM
修稿时间:2004-12-292005-05-21

EFFECT OF FERTILIZATION ON PHOSPHORUS FIXATION IN UPLAND RED SOIL AND ITS AFFECTING FACTORS
Yang Fang,He Yuanqiu,Li Chengliang,Wang Yanling and Lin Tian.EFFECT OF FERTILIZATION ON PHOSPHORUS FIXATION IN UPLAND RED SOIL AND ITS AFFECTING FACTORS[J].Acta Pedologica Sinica,2006,43(2):267-272.
Authors:Yang Fang  He Yuanqiu  Li Chengliang  Wang Yanling and Lin Tian
Institution:Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Abstract:Characteristics of phosphorus adsorption by upland red soils different in fertilization and their affecting factors were studied with X_m-value calculated out of the Langmuir curve as index.The results show:(1) X_m-value is always lower in soil fertilized with inorganic or organic phosphorus than in soil not fertilized with phosphorus.Livestock manure is an effective fertilizer because it makes X_m-value lower than other fertilizers.(2) Organic matter and available-Al significantly influence soil P absorbing capacity,which rises with the increase in available-Al content in soil,but it declines with the increase in organic matter content.pH and available-Fe are minor factors affecting X_m-value in this research.The above-listed results are testified by data reduction-analysis, indicating the content of organic matter was the most influential factor found.(3) Because of the good relationship between X_m-value and ff-value, which can be used as a basis for recommendation of P fertilization in practice,X_m-value may be an index to judge the amount of P fertilizer needed in the field primarily. In a word,these results contribute to research on transformation of phosphorus and determination of P application rate in red soil regions.
Keywords:Upland red soil  Different fertilization  Phosphorus adsorption  Affecting factor
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