【摘要】 北屯灌区降雨量少风沙大气候干燥,为典型的戈壁平原干旱风沙区。利用当地典型风沙区20年的逐日气象资料,对灌区参考作物需水量进行了分析计算,ET0值在年内与年际间变化较大,全年的7月上旬至8月上旬ETrad稍大于或基本等于ETaero外,其余月份基本上是ETaero大于ETrad,说明全年风速对ET0的影响相对来说比较大。对灌区内6种主要作物进行了作物需水量计算,其中地膜甜瓜和地膜打瓜需水量最小,全生育期需水量在300~350 mm之间,建议高效经济作物采用地膜种植可作为一项有效的节水措施。更多还原

【Abstract】 The BeiTun irrigation district is a typical Gobi plain arid windy and desert area,in which the rainfall is small,the wind and dust are great,and the climate is dry.Using the day-to-day meteorology data of local typical windy desert district in past 20 years,the reference crop water requirement of the irrigation district was analyzed in this paper.The result showed that the value of ET0 changed greatly in one year or multi-years.Except from the first ten days of July to the first ten days of August,the annual value of ETaero was larger than ETrad.It indicated that the influence of annual wind speed on ET0 was great.The water requirement values of six main crops in the irrigation district were calculated.The result showed that the water requirement values of plastic mulching sweet melon and plastic mulching dozen melon were minimum,the water requirement values of total growth period were 300～350 mm.It was suggested that the plastic mulching planting for economic crop was an effective water saving measure.更多还原