水稻用盐分浓度高的水灌溉后会发生盐害。其症状是,最初叶色浓,之后叶片从下到上叶尖枯萎,先现白色,逐渐变褐色。盐分浓度过高时叶很快全部枯萎,根变为褐色。发生盐害的盐分浓度因水稻不同生育时期而异。当盐分中的氯离子浓度为4000—5000毫克/升时 Salt damage occurs when rice is irrigated with high salinity water. The symptom is that the initial leaf color is thick, and then the leaves withered from the bottom to the top, the first white, gradually brown. When the salt concentration is too high, the leaves are rapidly wilting and the roots turn brown. The salt concentration of salt damage varies with different growth stages of rice. When the chloride ion concentration in the salt is 4000-5000 mg / L