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为探讨不同矿化度的水对土壤盐渍化的影响及相应的淋洗分数,采用土柱模拟方法,以小麦为指示作物,设计1.0 g/L,1.5 g/L两种矿化度,按3750 m3/hm2灌溉量,分一水、二水两种灌次,秋后进行人工淡水淋洗。结果表明,在半干旱气候条件下,开发碱性矿化水灌溉矿化度不宜超过1.5 g/L,否则有引起碱化的危险。干旱期用碱性矿化水灌溉抗旱时,在同等灌水量的情况下,一水灌溉比二水灌溉积盐轻。各种人工淋洗处理比CK洗盐效果好,其中以等量淋洗综合效益最好。
In order to investigate the effects of salinities of different salinities on soil salinization and the corresponding elution fractions, two soil salinities of 1.0 g / L and 1.5 g / L were designed by soil column simulation and wheat as the indicator. According to 3750 m3 / hm2 irrigation amount, divided into one water, two kinds of irrigation two times, artificial freshwater rinse autumn. The results show that under semi-arid climate, the development of alkaline mineralized water irrigation salinity should not exceed 1.5 g / L, otherwise there is the risk of alkalization. Irrigation drought with alkaline mineralized water during drought period, in the case of the same amount of irrigation, a water irrigation less salt than the two irrigation water. A variety of artificial leaching washing salt than CK good effect, of which the same amount of leaching the best overall efficiency.