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我國沿海各省的濱海區域,有許多河流,在乾旱時節,流量減少,海水倒灌,使河水含有較多的鹽分。這些含鹽河水是否可用以灌溉稻田? 水稻對灌溉水中鹽分的忍耐力如何? 等等,都是存在的實際問題。一般的說,水稻是比較耐鹽的作物,又因為稻田能維持淹灌層,使土壤溶液的濃度不至過高,所以在鹽鹼地開墾,當水源不缺乏時,常種植水稻;例如,渤海灣鹽鹼區的水
There are many rivers in the coastal areas of the coastal provinces of our country. In the arid season, the flow rate is reduced and the sea water is intruded so that the river contains more salt. Whether these salt water can be used to irrigate rice fields and how well rice endures salt in irrigation water are all practical problems. In general, rice is a salt-tolerant crop. Since paddy fields can maintain flooded irrigation so that the concentration of soil solution is not too high, they are cultivated in saline-alkali soil and often planted when there is no shortage of water. For example, in Bohai Bay Saline area of the water