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大型喷灌具有节水效率较高,配合性强,均匀灌溉等特点,喷灌节水的生产效率和全年产投比均较漫灌高。阿克苏地区荒漠节水示范基地,于1999年美国引进的先进设备,进行了三年生苜蓿喷灌和漫灌试验。1 试验概况 1.1 试验田为轻盐沙质土,地势高低不平,土壤肥力低,保水保肥性能差。试验地区属于干旱荒漠生态区,年降水量只有40-90毫米,年平均蒸发量大于3500毫米,年日平均气温10-11.4℃,光照充足。
Large-scale sprinkler has the characteristics of high water-saving efficiency, strong co-ordination and uniform irrigation. The production efficiency of sprinkler irrigation and water saving and annual investment ratio are all higher than that of flood irrigation. Aksu desert water-saving demonstration base, introduced in the United States in 1999, advanced equipment, carried out three years of alfalfa sprinkler irrigation and flood irrigation test. 1 Test Overview 1.1 Experimental field of light salt sandy soil, rugged terrain, low soil fertility, poor water and fertilizer performance. The experimental area belongs to the arid and desert ecological zone, with an annual rainfall of only 40-90 mm, an average annual evaporation of more than 3500 mm, annual average temperature of 10-11.4 ° C., and sufficient light.