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玛纳斯河流域绿洲土壤春季盐渍化研究/Soil Salinization in the Manas River Basin in Spring[J]
Authors
中国科学院新疆生态与地理研究所,荒漠与绿洲生态国家重点实验室,新疆乌鲁木齐 830011
吉力力·阿不都外力
+3 more
唐杨
新疆大学资源与环境科学学院,新疆乌鲁木齐830046
阿依古丽·买买提
Publication date
1 January 2013
Publisher
Abstract
运用经典统计学和冗余分析方法,对玛纳斯河流域绿洲土壤全盐量(TS)、pH、电导率(EC)、钠吸附比(SAR)和盐分离子组成的空间分布特征进行了分析.结果表明:土壤全盐量呈现明显的底聚特征,各层土壤全盐量均值在5.80~9.02 g·kg-1,表现为轻度至中度盐化;各层土壤中,pH在8.2 ~8.4、EC在0.70~1.38 mS·cm-1、SAR在0.25 ~0.64,未出现碱化现象.冗余分析表明:不同层次土壤中,Ca2+与SO42-、Na+与SO42-保持较好的关联性.TS的空间分布,在0~70 cm全剖面上主要受控于Na+、SO42-、Ca2+和Mg2+;分层与全剖面的情况略有不同,但Na+、SO42-在各个土层仍为最主要的控制离子.EC在全剖面上的空间分布受控于Na+、SO42-;50~70cm土层主要受Na+与Cl-的控制,其他土层与全剖面相同.pH受控于CO32-;除0~10 cm土层受HCO3-影响外,其他土层与全剖面相同.SAR在全剖面的空间分布受环境因子的影响较小,除50~ 70 cm土层受Cl-因子的制约外,0 ~ 50 cm土层未表现出明显的控制因子
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Last time updated on 29/11/2016