Uptake of Organic Phosphorus by Arbuscular Mycorrhizal Red Clover  

作　　者：SONGYONGCHUN P.CHRISTIE 

机构地区：[1]DepartmentofPlantNutrition,CollegeofAgriculturalResourcesandEnvironmentalSciences,ChinaAgriculturalUniversity,Beijing100094（China） [2]DepartmentofAgriculturalandEnvironmentalScience,The

出　　处：《Pedosphere》2002年第2期103-110,共8页土壤圈（英文版）

基　　金：National Key Basic Research Support Foundation (NKBRSF) of China(No. G1999011807) ;the Joint Open Laboratory of Soil and Environment between the Institute of Soil Science of the Chinese Academy of Sciences and Hong Kong Baptist University.

摘　　要：The capacities of two arbuscular mycorrhizal (AM) fungi, Glomusmosseae and Glomus versiforme, to mineralize added organic P werestudied in a sterilized clacareous soil. Mycorrhizal (inoculated witheither of the AM fungi) and non-mycorrhizal red clover (Trifoliumpratense L.) plants were grown for eight weeks in pots with upperroot, central hyphal and lower soil compartments. The hyphal and soilcompartments received either organic P (as Na-phytte) or inorganic P(as KH_2PO_4) at the rate of 50 mg P kg^-1. No P was added to theroot compartments.The capacities of two arbuscular mycorrhizal (AM) fungi, Glomus mosseae and Glomus versderme, tomineralize added organic P were studied in a sterilized calcareous soil. Mycorrhizal (inoculated with eitherof the AM fungi) and non-mycorrhizal red clover (Trghlium pmtense L.) plants were grown for eight weeksin pots with upper root, central hyphal and lower soil compartments. The hyphal and soil compartmentsreceived either organic P (as Na-phytate) or inorganic P (as KH2PO4) at tbe rate of 50 mg P kg-1. No P wasadded to the root compartments. Control pots received no added P. Yields were higher in mycorrhizal than innon-mycorrhizal clover. Mycorrhizal inoculation doubled shoot P concentration and more than doubled totalP uptake of plaflts in P-amended soil, irrespective of the form of applied P. The mycorrhizal contributionto inorganic P uptake was 80% or 76% in plants inoculated with G. mosseae or G. verefforme, respectively.Corresponding va1ues were 74% and 82% when Na-phytate was

关 键 词：arbuscular mcorrhiza organic P P uptake red clover 

分 类 号：S153.61[农业科学—土壤学]