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近些年来,我县各灌区广泛利用回归水灌稻田,平均每年回归水用量占灌溉用水的25%,尤其在干旱年份的枯水期,引用回归水对发展水稻生产起很大作用.回归水含盐量较高,利用回归水灌溉应掌握以下技术措施:1.回归水与河水搭配用水稻各生育期耐盐能力不同,回归水含氯根量偏高时,必须加适量河水稀释.在引用排水河道回归水之前,应进行水质化验,根据回归水的含盐量确定与河水混合的比例.盘山地区排水河道回归水与河水的混合比例一般采用1:2～3.混合后使氯根含量控制在0.2克/升以下.排水河道回归水往往受工业废水污染,对水稻生
In recent years, various irrigation districts in our county have made extensive use of returning water to irrigated paddy fields, with an average annual return of water accounting for 25% of irrigation water use, especially in the dry season in dry years, citing regression water plays a significant role in the development of rice production. The higher the amount of water, the use of return water irrigation should master the following technical measures: 1. Regression water and river water with different salt tolerance of different growth stages, the return of water containing high chloride content, you must add the appropriate amount of river water dilution in the reference drainage Before returning to the waterway, the water quality test should be carried out, and the proportion of mixing with river water should be determined according to the salt content of the returning water.The mixing ratio of return water and river water in the drainage channel of Panshan generally adopts 1: 2 ~ 3. After mixing, the control of chloride content At below 0.2 g / L, the return water of drainage channels is often contaminated by industrial wastewaters and raw rice