Water Budget Analysis of Red Soils in Central Jiangxi Province, China

作     者：CHENJia-Zhou HEYuan-Qiu CHENMing-Liangt CHEN Jia-Zhou, HE Yuan-Qiu and CHEN Ming-LiangCollege of Resources and Environment, Huazhong Agricultural University, Wuhan 430070 (China). E-mail:whcjz@263.netInstitute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China)

作者机构：CollegeofResourcesandEnvironmentHuazhongAgriculturalUniversityWuhan430070（China）.E-mail：whcjz@263net InstituteofSoilScienceChineseAcademyofSciencesNanjing210008（China） 

出 版 物：《Pedosphere》 (土壤圈（英文版）)

年 卷 期：2004年第14卷第2期

页      面：241-246页

核心收录：

学科分类：082802[工学-农业水土工程] 08[工学] 0828[工学-农业工程] 

基　　金：Project supported by the Knowledge Innovation Project of the Chinese Academy of Sciences (No. KZCX2-407) 

主　　题：red soil runoff plot water budget weighing lysimeter 

摘      要：The daily soil water budgets in the red soil areas of central Jiangxi Province,southern China,were investigated with a large-scale weighing lysimeter and runoff plots. From 1998 to 2000,peanuts (Arachis hypogaea L.) and rape (Brassica napus L.) were planted in the lysimeter and in 1999,peanuts were planted in the runoff plots. The soil water budget components including rainfall,runoff,percolation and evapotranspiration were measured directly or calculated by Richards equation and water balance equation. The results showed that most rainfall,including rainstorms,occurred from March to July,and induced the greatest soil water percolation during the year. The evapotranspiration was still large from July to September when rainfall was minimal. Thus,the lack of synchronization in soil water inputs and losses was disadvantageous to crops growing in this region. Among the soil water losses,percolation was the largest,followed by evapotranspiration,and then soil runoff. Runoff was very small on farmland with crops. It was significantly different from the uncultivated uplands where large-scale runoff was usually reported. The soil water storage fluctuated sinusoidally,with a large amplitude in the rainy season and a small amplitude in the dry season.