半干旱地区果园土壤Cl^-迁移积累与环境因子的关系

RELATIONSHIP BETWEEN CHLORINE ION TRANSFER/ACCUMULATION AND ENVIRONMENTAL FACTORS IN ORCHARDS SOIL OF SEMI-ARID REGION

为揭示环境因子对果园表层土壤氯离子迁移累积的影响,为预防和改良土壤次生盐渍化提供理论依据和相关指导,研究了果树生育期表层土壤不同土层氯离子的变化与环境因子(土温、土壤水分、蒸发量、降雨量、水分亏值、气温、空气相对湿度)的相互关系。结果表明:在土壤0～25cm土层的微域范围内,不同土层对氯离子的迁移与累积具有不同的功能,其中0～5cm土层为氯离子聚集层,10～15cm土层为氯离子传导层。本研究认为10～15cm土层是半干旱地区环境因子对土壤性质直接作用与影响的临界深度。

In order to reveal the effect of environmental factors on chlorine ion accumulation in topsoil of orchards, and provide theoretical guidance and mutuality gist to prevent and reclaim of soil salinization, the relationship between chlorine ion in topsoil of different soil layer and environmental factors （soil temperature, soil moisture, evaporation, rainfall, the deficit value of water, air temperature, air relative humidity） were studied during the growth of apple trees.The results showed that different soil layers with different functions within the range of the 0～25 cm profile as far as the chlorine ion transferring and accumulating concerned. The chlorine ion assembling layer was the 0～5 cm, the conduction layer was the 10～15 cm. And it was considered that the 10～15 cm layer was the critical layer that environment factors direct and influence soil character in semi-arid region.