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Salt—Water Dynamics in Soils:V.Salt Balance in Soil Profiles

机译:土壤中的盐—水动力学:土壤剖面中的盐分平衡

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摘要

Salt balance in simulated soil coulumns was calculated on the basis of a large amount of long term observation data.The results showed that under the climate conditions of semi-arid region of the Huang-Huai-Hai Plain,the soils in the columns were under salt accumulation conditions when the groundwater depth was controlled at less than 2.0m,and under desalinization conditions when at larger than 2.5m.In the soil columns with clay soil and silty loam soil intercalated with a clay layer,the amount of salt accumulated was far less than that in the soil column with silty loam soil throughout the whole profile.Under no irriagtion conditions crop planting may increase groundwater evaporation and hence salt accumulation in soil,making the soil columns under desalinization be under salt accumulation conditions.
机译:在大量长期观测数据的基础上,计算了模拟土壤柱中的盐分平衡。结果表明,在黄淮海平原半干旱地区的气候条件下,柱下土壤处于地下水深度控制在2.0m以下时的盐分积累条件,大于2.5m时在脱盐条件下的盐分条件。在粘土层和粉质壤土层间夹有粘土层的土壤柱中,盐分的累积量很大。在整个灌溉条件下,种植作物可能会增加地下水蒸发量,从而增加土壤中的盐分积累,使脱盐条件下的土壤柱处于盐分积累条件下。

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