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推广节水灌溉是新时期发展农田灌溉的战略选择中华人民共和国成立以后,我国农田灌溉事业迅速发展,农业生产条件不断改善,抵御干旱等自然灾害的能力增强,灌溉为粮食产量从1000多亿千克增加到5千亿千克起到促进和保障作用。1980年以后,灌溉面积长期徘徊,直到最近几年才缓慢增加。灌溉用水量基本不增,维持在3500～3600亿立方米之间。灌溉用水量在全国用水总量中所占比例逐步下降。尽管过去18年间每年新建大量灌溉工程,但灌溉面积和灌溉供水量不增加或增加很少这一事实说明,经过前30年大规模建设,容易开发的水土资源多已利用,靠大量消耗资源,以外延为主的增长方式行不通了。节水挖潜,集约经营,是新的历史阶段我国农田灌溉发展的必然选择。除了洪涝之外,当前我国农业在与水有关的方面面临着三个大的问题。一是干旱缺水成为影响我国农业持续稳定发展的主
The promotion of water-saving irrigation is a strategic choice for the development of farmland irrigation in the new era After the founding of the People’s Republic of China, the irrigation industry in our country developed rapidly, the conditions for agricultural production were continuously improved, and the ability to withstand natural disasters such as drought and drought was enhanced. The irrigation capacity is more than 100 billion kilograms Increased to 500 billion kilograms played a role in promoting and safeguarding. After 1980, the irrigated area has been hovering for a long time and only slowly increased in recent years. Irrigation water basically did not increase, maintained at 3500 ~ 360 billion cubic meters. The proportion of irrigation water in the national total water consumption decreased gradually. Despite the fact that a large number of new irrigation projects have been constructed each year over the past 18 years, the fact that irrigated area and irrigated water supply have not increased or increased infrequently shows that after the first 30 years of large-scale construction, land and water resources that have been easily exploited have been used extensively, The extension of growth based on extension will not work. Water saving and tapping potential and intensive management are the inevitable choices for the development of farmland irrigation in the new historical stage. In addition to floods, China’s agriculture now faces three major problems in relation to water. First, drought and water shortage have become the main influence on China’s sustained and stable development of agriculture