Effects of Some Management Practices on Electron Transport System (ETS) Activity in Paddy Soil

作     者：A．SUBHANI LIAOMIN 等 A. SUBHANI, LIAO MIN , HUANG CHANGYONG and XIE ZHENGMIAO Natural Resources Science Dept., College of Natural Resources and Environmental Sciersces, Zhejiang University, Hangzhou 310029 (China)

作者机构：NaturalResourcesScienceDept.CollegeofNaturalResourcesandEnvironmentalSciencesZhejiangUniversityHangzhou310029China NaturalResourcesScienceDept.CollegeofNaturalResourcesandEnvi 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2000年第10卷第3期

页      面：257-264页

核心收录：

学科分类：090403[农学-农药学(可授农学、理学学位）] 09[农学] 0903[农学-农业资源与环境] 0904[农学-植物保护] 090301[农学-土壤学] 

基　　金：Project supported by the International Rice Research Institute (IRRI) under project of Reversing Trendsof Declining Productiv 

主　　题：electron transport system (ETS) activity insecticide moisture nitrogen temperature 

摘      要：Electron transport system (ETS ) / dehydrogenase activity in a paddy field soil was measured under a variety of incubation conditions using the reduction of 2- (p-iodophenyl- 3- (p-nitrophenyl ) -5- phellyl tetrazolium chloride (INT) to iodonitrotetrazolium formazan (INTF). The results exhibited a high positive correlation between the ETS activity and the incubation temperature and soil moisture. Dehydrogenase/ETS activity displayed a negative correlation with insecticide concentrations, and the activity affected adversely as the concentration of the insecticide increased. The higher doses, 5 and 10 field rates (1 field rate ~ 1500 mL ha-1), of insecticide significantly inhibited ETS activity, while lower rates failed to produce any significant reducing effect. Inorganic N (as urea) of concentrations from 0 to 100 ug N g-1 soil showed a positive response to ETS activity. However, at concentrations of 200 and 400 ug N g-1, the activity was reduced significantly.