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准噶尔盆地盐渍土壤水盐动态及其对植被影响 被引量:11

Soil water and salinity dynamics and its effects on vegetation emergency in Zhungaer Basin
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摘要 以准噶尔盆地北部边缘囊果碱蓬为主的多汁盐柴类荒漠为研究对象,结合野外采样、植物群体和个体的调查统计,对春夏季土壤水盐动态变化及植被发生对水盐变化的响应进行了研究。结果显示,土壤水盐变化以春季表层土壤为最剧烈,自早春至夏季土壤水分呈现先升高,后降低的趋势,土壤盐分变化则相反;植物的发生在群体密度和个体存活率上表现先较高后下降的规律,这证明当地植被的发生与土壤水盐动态变化关系密切,在干旱区,水热模式是决定植物发生和分布的重要因素。 In the analysis of soil sample, it was found that the change of water and salinity was most intense in soil surface layer; from early spring to summer, soil water showed a continual drop, but soil salinity changed as an opposite trend. Moreover, a drop was observed in population density and seedling survival about the demographic survey. The result suggests that there is a close relation between vegetation emergency and soil water and salinity dynamics. It is concluded that water-heat pattern may play an important part in plant emergency and distribution in arid region.
出处 《辽宁工程技术大学学报(自然科学版)》 EI CAS 北大核心 2007年第2期296-299,共4页 Journal of Liaoning Technical University (Natural Science)
基金 中国科学院"西部之光"人才培养计划项目(2005) 中国科学院新疆生态与地理研究所所长基金项目特别资助
关键词 水盐动态 盐渍土 准噶尔盆地 植被 soil water and salinity dynamics saline soil the Zhungaer Basin vegetation
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