随着农业、工业、城镇、旅游各业的用水发展,用水不足的现象日益突出。农业是用水大户,迫切需要工程灌区内实行农业综合节水技术,在保证作物产量水平条件下,降低农业供水定额,以提高现有工程水的综合效益,缓解供水不足矛盾。为此,四川省水利电力研究所首先改变只局限于研究单项节水技术的方法,从1985年起至1989年间,选定绵阳市金花水库灌区作试 With the development of water used in agriculture, industry, towns and tourism, the phenomenon of insufficient water has become increasingly prominent. Agriculture is a major user of water and there is an urgent need to implement integrated water saving technologies in irrigation areas. Under the condition of ensuring the level of crop yields, agricultural water quotas should be reduced so as to improve the comprehensive benefits of existing water projects and alleviate contradictions of insufficient water supply. To this end, Sichuan Institute of Water Conservancy and Electric Power first changed only limited to the study of individual water-saving techniques, from 1985 until 1989, selected Mianyang Jinhua Irrigation District for trial