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不同种植年限砂田水盐变化与砂田退化初探
引用本文:王平,谢成俊,陈娟.不同种植年限砂田水盐变化与砂田退化初探[J].水土保持通报,2012,32(2):252-254.
作者姓名:王平  谢成俊  陈娟
作者单位:1. 兰州市农业科技研究推广中心,甘肃兰州,730010
2. 庆阳市农业科学研究院,甘肃庆阳,745000
摘    要:随着种植年限的增加,砂田的土砂比、土壤的水分与盐分含量都发生了明显的变化,加速了砂田的退化。对不同种植年限的砂田水盐变化及发生机理进行了分析,并总结了砂田退化的原因。结果表明,随种植年限的增加,提高了砂田的土砂比,砂田的保水、蓄水、抑蒸发、抑盐作用相对减弱,砂田的水盐变化与种植年限、砾石覆盖度、砂砾粒径、砂砾所处土壤表面的位置及地下水位密切相关,在一定程度上影响着砂田的退化。

关 键 词:砂田  不同种植年限  水盐变化  砂田退化
收稿时间:2011/11/14 0:00:00
修稿时间:2011/11/30 0:00:00

Degredation of Sand Fields and Water-Salt Variations with Different Planting Years
WANG Ping,XIE Cheng-jun and CHEN Juan.Degredation of Sand Fields and Water-Salt Variations with Different Planting Years[J].Bulletin of Soil and Water Conservation,2012,32(2):252-254.
Authors:WANG Ping  XIE Cheng-jun and CHEN Juan
Institution:1.Lanzhou City of Agricultural Technology Extension Center,Lanzhou,Gansu 730010,China; 2.Qingyang Academy of Agricultural Science,Qingyang,Gansu 745000,China)
Abstract:Over years of planting,soil-to-sand ratio and the contents of soil salt and water in the sand fields changed substantially,and the degradation of the sand lands accelerated.This study addressed the mechanism of water—salt variation and summarized the causes of degradation,providing the basis for sand field maintenance.The results show that the practice of cultivation increased soil-to-sand ratio,however,reduced soil water holding capacity,soil water storage,and soil anti-evaporation capacity.The water—salt variation of the sand land was closely related to the length of planting years,gravel cover thickness,diameter of the gravels,location of gravel on the surface soil,and water table depth.To some extent,the water—salt variation has led to the degradation of the sand fields.
Keywords:sandy field  different planting years  water-salt variation  degradation of sand field
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