伊犁河流域砂质薄土层苜蓿喷灌技术研究

【目的】针对伊犁河流域水土开发区域面临砂质薄土层的灌溉问题,通过苜蓿生产喷灌试验,确定伊犁河谷型砂质薄土层耕地苜蓿生产喷灌最佳灌溉制度和喷灌水肥调控技术。【方法】设置4个不同的灌溉定额4 2004、8005、400和6 000 m3/hm2处理,采取统一的灌溉周期4 d,并对苜蓿的生长速度、再生速度、鲜草产量和干草产量等指标进行研究。【结果】应用小水量多灌次的喷灌技术,灌溉定额对产量有较显著的影响,成正相关,当灌溉定额在5 400 m3/hm2时,可获得最佳产量。【结论】在伊犁河流域砂质薄土层苜蓿喷灌生产,采用小水量多灌次和生育期内追肥的苜蓿喷灌水肥调控技术,可使该地区苜蓿生长达到较好水平,显著提高饲草产量。

A Study on Sprinkling Irrigation Techniques for Alfalfa in Thin and Arenaceous soil in Ili River Basin

【Objective】Based on irrigation of thin and arenaceous soil at water and soil development area of Ili River basin,the best irrigation system and control techniques of fertilizer and water for alfalfa production are identified with irrigation experiments.【Method】Alfalfa is treated with four different irrigation quotas(4 200 m3/hm2,4 800 m3/hm2,5 400 m3/hm2,6 000 m3/hm2),a uniform irrigation period-four days and growth rate,regeneration rate,fresh grass yield,hay yield and other indexes are studied.【Result】The irrigation quotas and irrigation techniques have obvious effect on production,which is shown as positive correlation,with the application of less amount-more times irrigation technique.【Conclusion】The growth and production of alfalfa will be significantly improved with the control technique in Ili river basin.