汾河灌区春浇灌水定额探讨

Discussing into Watering Quota for Spring Irrigation in Fenhe Irrigation District

本文针对汾河灌区水源及输水的实际情况 ,从抗旱及压盐两个角度对汾河灌区春浇灌水定额进行了分析。分析结果知 :在水源只能依靠河水的地区 ,主要以抗旱为主 ,采用春浇灌水定额 15 0～ 180 /亩 ;在有其它水源补充灌溉且土壤含盐量对作物生长发育有影响的地区 ,主要以压盐为主 ,采用春浇灌水定额 10 0～ 130 /亩 ;有其它水源补充灌溉 ,土壤含盐量不影响作物生长发育的地区 ,采用春浇灌水定额 6 0～ 90 /亩。

According to the actual condition of water source and water conveyance in Fenhe irrigation district, the watering quota of spring irrigation is analyzed from two aspects of drought resistance and of leaching. The analysis results show that: in the area where there is only river water, and the purpose of irrigation is mainly the drought resistance, the watering quota for spring irrigation is 150 180*e/mu; In the area where there are other water sources, the growth of crop is influenced by salt content in soil, and the purpose of irrigation is mainly the leaching, the watering quota for spring irrigation is 100 130 *e/mu; In the area where there are other water sourccs and the growth of crop is not influenced by salt content in soil, the watering quota for spring irrigation is 60 90 *e/mu;