Study　on　Water－Soluble　Organic　Reducing　Substances：Ⅲ．Electrochemical　Properties　of　Decomposition　Products　of　Rice　Straw　and　Their　Interactions　with　Variable　Charge　Soils

作     者：WU YOUXIAN(Institute of Soil Science,Acodemia Sinica,P.O.Box 821,Nanjing 210008 China) 

作者机构：Institute of Soil Science Academia Sinica P. O. Box 821 Nanjing 210008 China 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：1996年第6卷第2期

页      面：167-173页

核心收录：

学科分类：09[农学] 0903[农学-农业资源与环境] 090301[农学-土壤学] 

主　　题：electrochemical properties organic reducing substances rice straw variable charge soils 

摘      要：Some electrochemical properties,such as PH,Eh,and voltammetric behavior,of the decomposition products of rice straw and the in eractions of these products with soils were *** PH,Eh,and amounts of organic reducing substances changed markedly during the 60-day anaerobic *** decreased sharply to pH 5 on the tenth day and then increased gradually to 7 on the 45th *** amouats of organic reducing substances increased almost synchronously with the fall of redox potential during the first 15 *** differential pulse voltammetric(dpv) behavior changed not only in the peak current but also in the peak *** fractions with apparent molecular weights lower than 200 dations appeared to be active in dpv *** electric charge of organic reducing substances was closely related to the decomposition *** 6th day of incubation was the crucial time before and after which the major part of the components was negatively charged and positively charged, *** group with a low apparent molecular weight and a negative charge was the main components responsible for the lower anodic peak *** were oxidized first during the interactions of the organic reducing substances with soils.