海南胶园土壤磷吸附特性及其影响因素  

Characteristics of Phosphorus Sorption and Their Impact Factors in the Soil of Hainan Rubber Plantations

作　　者：钟庸[1] 蒋菊生[2] 孟磊[1] 龙敏杰[1] 阮云泽[1] 

机构地区：[1]海南大学农学院,海南儋州571737 [2]海南农垦科技创新中心,海口571026

出　　处：《热带作物学报》2009年第10期1413-1416,共4页Chinese Journal of Tropical Crops

基　　金：海南大学校基金(No.Rnd0702);海南省博士生创新基金(2008年度);海南省作物栽培学与耕作学重点学科资助

摘　　要：研究海南农垦7个胶园土壤磷吸附特性及其影响因素,结果表明:①Langmuir、Freundlich和Tempkin方程都能很好与等温吸附曲线拟合,其中Langmuir方程拟合效果最好并与研究结果最相符;②不同母质发育的土壤磷吸附能力依据土壤磷的最大吸附量Xm排序为:玄武岩>砂页岩>变质岩>花岗岩>浅海沉积物;③土壤CEC7.0、粘粒含量、有机质含量、游离铁含量等因素显著影响土壤磷的吸附能力,其中土壤有机质含量与土壤磷最大吸附量Xm呈显著负相关,同时,土壤粘粒含量越高,供试土壤磷的吸附能力越强。The soils from 7 rubber plantations were sampled and added with phosphorus to determine phosphorus sorption of the soils. The results showed that Langmuir, Freundlieh and Tempkin equations could fit well with the curves of phosphorus sorptiou isotherms, of which Langmuir equation had the best fitting and accorded with the research result. Phosphorus sorption capacity of the soil derived from different parent materials depended on maximum soil phosphorus sorption and was in the order of basalt〉sandy shale〉metamorphic rock 〉granite 〉neritic deposits. The value of CEC7.0 and the contents of clay, organic matters and free iron showed significant correlation with the P sorption capacity, and the organic matters had the significantly negative correlation with the maximum P sorption capacity. In the meantime, the higher the content of clay of the soils, the higher the P sorption capacity of the soils.

关 键 词：橡胶园土壤 磷素吸附 影响因素 

分 类 号：S153[农业科学—土壤学]