【摘要】 我国是世界受沙漠化影响最严重的国家之一,且集中发生在生态环境脆弱区,仅浑善达克沙地每年就有21万hm2的草地沦为沙漠化土地,每年因风沙危害造成的直接经济损失达50亿元。草地生态环境恶化,不仅极大地影响了当地畜牧业生产的发展,而且对区域人民的生产生活均造成巨大影响。本文针对干旱半干旱地区,采用水量平衡法及主要植被的生理指标研究植被生态系统现状用水量,以及达到某一目标要求的用水量的确定,这将为流域规划、生态建设以及水资源合理配置提供理论依据。更多还原

【Abstract】 China is one of the most severe countries influenced by the desertification in the world.Desertification accuvred in the tender ecological condition region.There is 210,000-hectare desertification grassland only in Hunshandake Desert.The economic losses are about 5billian per year.Because of the deterioration of grassland,the development of livestock raising is affected enormously.In this paper,the water balance method and physiological index of main vegetation are adopted,to study the actual water use,define the quantity of water use and reach the aiming in arid and semi-arid area.It is important for river basin plans,ecological construction and reasonable allocate of water resources.更多还原