宁夏扬黄限额灌区降水资源高效利用技术研究

在宁夏中部干旱带年平均降雨量350 mm的限额灌溉区,以滴灌玉米种植为对象,集成覆膜微集雨、土壤保水、抑制蒸腾等技术,开展降水资源就地高效利用试验研究,通过对试验区玉米在不同模式下产量及水分生产效率的对比分析,从而提出深翻20～40 cm+半覆膜膜侧种植+保水剂(秦威加力7.5 kg/hm2)+喷施抗蒸腾剂(万代红1.05 L/hm2)为宁夏中部干旱带限额灌溉区适宜的玉米降水资源高效利用模式,产量达到13 785 kg/hm2,水分利用效率达到4.22 kg/m3。

Study on technology of efficient utilization of rainfall resources in supplementary irrigated area of pumping from Yellow river in Ningxia

Taking corn plant as the object, integrating the technologies of micro-collection rainwater, soil water retention and inhibit transpiration on corn, this paper carried out the experiment on efficient utilization of rainfall resources in the arid area of middle Ningxia where the annual average rain is 350mm. By contrastive analysis of crop yield and efficiency of water in different modes of rainfall efficient utilization, it put forward appropriate rainfall resources utilization mode of corn with supplementary irrigation in arid area middle Ningxia witch is that turn the soil 20to 40cm, half coated ,water retention agent (Qinweijiali 7.5kg/hm²) ,inhibit transpiration agent (Wandaihong 1.05L/hm²).The crop yield reached 13785kg/hm²,the utilization efficiency reached 4.22kg/m³.