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中国是一个水资源紧缺的国家,人均水资源仅为世界水平的1/4。在占国土面积53%的北方干旱、半干旱地区,缺水情况更为严重,每年降雨量仅有300～500mm,且集中在7、8、9三个月,每年有1300～2000万hm~2耕地受到严重干旱的威胁。然而我国灌溉用水的利用率很低,仅为发达国家的1/2,使本来就不充足的降水不能被作物高效、合理地利用,极大地制约了旱区的发展。因此,根据北方旱农区的生产实际和已有条件,研究如何利用有限的水资源,发展具有中国特色的农业节水技术与设备,对保证我国农业的持续发展
China is a water-scarce country with per capita water resources at only 1/4 of the world’s total. In the northern arid and semi-arid areas that account for 53% of the country’s land area, water scarcity is even more serious. The annual rainfall is only 300-500mm, and it is concentrated in the 7th, 8th, and 9th months, with an annual rainfall of 13-20 million hm ~ 2 Cultivated land is threatened by severe drought. However, the utilization rate of irrigation water in our country is very low, only 1/2 of that of developed countries. Premature precipitation, which is not enough, can not be efficiently and rationally used by crops, which greatly restricts the development of arid areas. Therefore, according to the actual production and conditions in the northern arid region, we should study how to utilize limited water resources to develop agricultural water-saving technologies and equipment with Chinese characteristics to ensure the sustainable development of agriculture in our country