【摘要】 2012年在西北干旱地区宁夏中部干旱带同心黑膜覆膜条件下,研究了洋葱喷灌方式灌溉量及灌水次数对洋葱产量的影响。结果表明:喷灌2 100m3/hm2处理鳞茎产量最高为77 414.1kg/hm2,较喷灌900m3/hm2处理增产28.50%,供水效率143.09kg/(hm2·mm),水分生产效率155.39kg/(hm2·mm),与喷灌900m3/hm2相比,水分生产效率提高7.53%。因此,优化出洋葱喷灌生产模式灌溉定额2 100m3/hm2,缓苗水300m3/hm2、叶旺长期600m3/hm2、喷灌2次,鳞茎生长期1 200m3/hm2、喷灌4次。更多还原

【Abstract】 In 2012,under the black film mulching condition in the northwest arid areas of central Ningxia arid zone,Tongxin county, the influences of sprinkler irrigation times and quantity on the yield of onion were studied.The result showed that the treatment with irrigation quantity of 2 100m3/hm2 got the highest yield of 77 414.1kg/hm2,which was higher than the yield of the treatment with irrigation quantity of 900m3/hm2 by 28.50%,the water-supply efficiency was 143.09kg/(hm2·mm)and the water production efficiency was 155.39kg/(hm2·mm),which was enhanced by 7.53% compared with the treatment with irrigation quantity of 900 m3/hm2.So the optimal sprinkler irrigation schedule was got,which was that the irrigation quota was 2 100m3/hm2,the irrigation quantity was 300,600,1 200m3/hm2 in the seedling stage,leaf exuberant stage and bulblet growth stage,respectively;the irrigation times is 2and 4in leaf exuberant stage and bulblet growth stage,respectively.更多还原