基于SHAW模型的内蒙古河套灌区秋浇节水灌溉制度

根据内蒙古河套灌区秋浇节水与土壤盐渍化防治的需要，利用SHAW模型模拟确定了不同盐渍化土壤合理的秋浇节水灌溉制度。结果表明：对于轻度盐渍化土壤，秋浇定额一般为142～183 mm，秋浇时间为9月28日－10月23日；对于中度盐渍化土壤，定额应该为180～200 mm，时间在10月14日－18日；对于重度盐渍化土壤，一般不种小麦，而种葵花等耐盐作物，定额为200～225 mm。因此，对于该灌区应该根据不同的土壤盐渍化程度，合理地安排秋浇。

Scheme of water saving irrigation in autumn based on SHAW model in Inner Mongolia Hetao irrigation district

In accordance with the prevention of soil salination and water-saving irrigation in autumn in Inner Mongolia Hetao irrigation district, the reasonable water-saving irrigation scheme in autumn was quantificationally established by using SHAW model in theory, which aimed at the different salinized soils. For slight salinized soils, autumn irrigation quota was from 142 to183 mm between September 28 and October 23. For moderate salinized soils, autumn irrigation quota was from 180 to 200 mm between October 14 and 18. For serious salinized soils, planting sunflower instead of wheat, autumn irrigation quota was from 200 to 225 mm. In the studied irrigation district, autumn irrigation is supposed to be reasonably arranged according to the different salinized soils.