Effect of Lead-Zinc Interaction on Size of Microbial Biomass in Red Soil

作     者：K. S. KHAN and HUANG CHANGYONG College of Natural Resources and Environmental Sciences, Zhejiang Agricultural University, Hangzhou 310029 (China) 

作者机构：Coll. National Research and Environment Science Zhejiang Agricultural University Hangzhou 310029 China 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：1998年第8卷第2期

页      面：143-148页

核心收录：

学科分类：07[理学] 0818[工学-地质资源与地质工程] 09[农学] 0903[农学-农业资源与环境] 0901[农学-作物学] 090301[农学-土壤学] 0713[理学-生态学] 

主　　题：interaction lead microbial biomass red soil zinc 

摘      要：A laboratory incubation experiment was conducted to evaluate the effects of lead and zinc applied alone or in various combinations on the size of microbial biomass in a red soil. Treatments included the application of lead at six different levels i.e., 0 (background), 100, 200, 300, 450 and 600 μg g -1 soil along with each of the four levels of zinc (0, 50, 150 or 250 μg g -1 soil). Application of lead or zinc alone to soil significantly ( P 0.001) affected the soil microbial biomass. The microbial biomass carbon (C mic ), biomass nitrogen (N mic ) and biomass phosphorus (P mic ) decreased sharply in soils contaminated with lead or zinc. Combined application of lead and zinc resulted in a greater biocidal effect on soil microbial biomass, which was significantly higher ( P 0.001) than that when either lead or zinc was applied alone. Consistent increase in the biomass C:N and decline in the biomass C:P ratios were also observed with the increased metal (Pb and Zn) toxicity in the soil.