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塔克拉玛干沙漠腹地多枝柽柳茎干液流及耗水量
Authors
姚世军
张希明
许浩
闫海龙
Publication date
1 January 2007
Publisher
Abstract
2005年4—11月,利用植物茎流计研究了塔克拉玛干沙漠腹地沙漠公路防护林植物多枝柽柳的茎干液流特性和耗水量.结果表明:在极端干旱的沙漠腹地,土壤水分充足时,直径为3.5和2.0cm的多枝柽柳在整个生长季的日平均耗水量分别为6.322和1.179kg;多枝柽柳的茎干液流呈单峰曲线型,有明显的昼夜变化规律,茎干液流随环境因子变化而波动;在土壤水分充足的条件下,总辐射、风速、温度是影响茎干液流变化的主要环境因子,可以用总辐射和风速的线性回归模型预测茎干液流的变化.沙漠腹地多枝柽柳的蒸腾耗水量相对较高,是因为在较为充足的水分供应条件下,多枝柽柳通过大量的水分消耗来抵御干燥高温的沙漠环境
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Last time updated on 29/11/2016