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本文研究了灌溉水质对土壤水盐动态和牧草生长的影响。灌溉水含盐量分别为１００、１５００和３０００ｍｇ／Ｌ，设有６个试验处理。在高含盐水灌溉期间，盐分在土壤剖面中累积，低含盐水灌溉和冬季降雨期间部分土壤盐分被淋洗。由于盐分累积与淋洗反复进行，以及弱透水层的存在，可溶盐在６０—９０ｃｎ１土层明显增加，土壤溶液钠吸附比（ＳＡＲ）随灌溉水含盐量增加而增高，牧草茎叶中的盐分亦随之而变化。当灌溉水含盐量达到１５００ｍｇ／Ｌ时，牧草产量不受影响，灌溉水含盐量３０００ｍｇ／Ｌ时在不同试验处理条件下仅仅减产９％至１７％，显然，灌溉管理及盐分控制措施起着一定的调节作用。
In this paper, the effects of irrigation water quality on soil water and salt dynamics and pasture growth were studied. Irrigation water salinity were 100,1500 and 3000mg / L, with six experimental treatment. During periods of high salt water irrigation, salinity accumulates in the soil profile, low salt water irrigation and some soil salinity during winter rains. Due to the repeated accumulation of salt and leaching, as well as the presence of the aquitard, soluble salts increased significantly in the soil layer of 60-90 cm -1, and the sodium adsorption ratio (SAR) of soil solution increased with the increase of irrigation water salinity. The salt also changes. When the irrigation water salinity reached 1500mg / L, the grass yield was not affected. When the irrigation water salinity was 3000mg / L, the yield was reduced by only 9% to 17% under different experimental conditions. Obviously, the irrigation management and salt control measures With a certain regulatory role.