大洼灌区十五干、十六干包括清水农场、赵圈河苇场等11个生产大队,共有水稻4.0万亩。这些稻田在开发前属氯化物中、重度盐化草甸土,地下水矿化度为5—10克/升,个别高达15克/升以上。种稻改良后,土壤、水文地质条件发生了很大变化,耕层土壤盐分,由原来的0.6—1.0%,下降到0.179—0.282%,水稻单产有的已高达900多斤。但近几年 Dawa irrigation fifteen, sixteen dry, including Shimizu farm, Zhaoquanhe reed field and other 11 production brigades, a total of 40,000 acres of rice. Before the development of these paddy fields in the chloride, severe salinization of meadow soil, groundwater salinity of 5-10 g / l, individual up to 15 g / l above. With the improvement of paddy cultivation, the soil and hydrogeological conditions have undergone great changes. The salt content of topsoil has dropped from 0.6-1.0% to 0.179-0.282%. The yield of paddy rice has reached as high as 900 kilos. But in recent years