河西走廊干旱区盐渍土扰动对土壤性质的影响

采用随机调查法比较研究不同扰动方式对河西走廊干旱区盐渍土壤性质的影响结果表明,生长梨树、繁育杜梨苗、种植小麦、弃耕和休闲均使土壤HCO_3~-表聚和表层土壤Ca~(2 )含量减少,其中繁育杜梨苗地土壤Ca~(2 )减幅最大。盐渍土壤容重除与植物根系分布相关外,也受其性质和土壤有机质含量的影响。弃耕和土地休闲使土壤盐分表聚,降低了土壤可耕性,干旱区改良盐渍土地可首选种植小麦。

Effect of different interferences on soil characters in saline soil of Hexi Corridor arid zone

The effects of different interferences on saline soil characters are compared in arid area of Hexi Corridor by random investigation.The Ca content reduces and HCO3 content increases in surface layer of soil on the land of planting pear tree,breeding Pyrus betulaefolia Bage,growing wheat,discarded land,and fallow.The reducing ratio of Ca2 content in soil of breeding Pyrus betulaefolia Bage is the biggest.The value of buck density is related with the amount of root,saline soil character and organic matter.The discarded land and fallow will reduce suitable activity of soil for growth.Planting wheat is the best way to improve saline soil in the arid zone.