摘要
以水量平衡理论为基础,定量研究中国亚热带东部丘陵区农田生态系统在自然状态下与人类影响条件下的水循环特征,探讨农田生态系统水循环过程与区域性水循环过程之间的差异。结果显示:本区多年平均生态需水量2756.4×108m3,降水过程满足了其中的81%,亏水量534.5×108m3,剩余水量1666.5×108m3;系统中水稻的有效降水量虽然很大,但水分满足率最低;薯类、豆类等作物的有效降水量小,但水分满足率较高。然后分析了历年水旱灾害记录与农田生态系统水循环过程之间的对应关系,以证明结果的准确性。
Based on the water balance theory,a water cycle model of farmland ecosystem,effected by both nature and irrigation in subtropics hilly area in Eastern China was built.Results show that the annual water requirement of the system is 2 756.4×108m3,while 81% of this supplied by precipitation,as well as 534.5×108m3 of water deficit and 1 666.5×108m3 of water surplus.Paddy has an high effective precipitation,but the lowest satisfaction in water requirement.By comparing the annual drought and inundation records with their frequencies from the model,the presumption of accuracy was done.
出处
《江西科学》
2003年第2期110-117,共8页
Jiangxi Science
基金
中国科学院地理科学与资源研究所知识创新工程资助(课题编号:CX10G_E01_0802_KZCX2_407)
