干旱区植被生态需水理论研究进展

Advances on Theories of Ecological Water Requirements of Vegetation in Arid Area

综述了植被生态需水的概念及其内涵,评价了植被生态需水的主要研究理论——生态适宜性理论、系统阈值理论、水文循环水量平衡理论、农业气象学理论,评析了各种理论在实践应用中的优缺点。指出在未来的植被生态需水研究中应加强生态体系健康标准建立、定量评价指标体系的数值模拟模型构建,研究中还必须注重植被生态需水的时空特性,充分利用"3S"技术手段和先进的科学试验设备,全方位、多角度获取不同研究区域的基础信息,为建立植被生态需水理论提供可靠的数据支撑。

Based on a synthesis of the literatures on Ecological water requirement of vegetation （ EWRV）, the conceptions and meanings of EWRV were systematically reviewed in this paper. The Ecological appropriate theory, the system threshold theory, the water cycle-balance theory and the agro-meteorology theory were introduced in detail at the beginning of the paper, and then their corresponding advantages and disadvantages in the practical application were also examined. It was also pointed out that researches about healthy standards of ecological system; multidisciplinary research; numerical simulation model of EWRV in quantitative evaluated index system should be intensified in the future. At the same time, future research will be focused on spatial-temporal characteristic of EWRV. In order to provide a great deal of reliable data for the theory research of EWRV, the basic databases of different regions must be obtained at various orientations and angles by using “3S” technology and advanced equipment.