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鄂尔多斯高原沙地柏液流通量及其影响因子
Authors
吴彩霞
朱雅娟
李蕴
杜娟
Publication date
1 January 2020
Publisher
Doi
Cite
Abstract
[目的]分析沙地柏液流通量变化特征及主要影响因子,为沙地植被的保护提供理论依据。[方法]以鄂尔多斯高原沙地植被的优势种沙地柏为研究对象,利用热扩散(TDP)技术监测生长季沙地柏的液流动态,通过相关分析和回归分析等研究其与气象因子的关系。[结果]晴天沙地柏的液流通量为单峰曲线,干旱时为双峰曲线。雨天沙地柏的液流通量为单峰或双峰曲线。晴天沙地柏液流通量的最大值是2.30~23.38 g/(cm~2·h)。沙地柏液流通量对降雨的响应具有1~4 d的时滞。生长季沙地柏液流通量与光合有效辐射、水汽压亏缺、气温和风速均呈显著正相关,而与相对湿度和降雨量呈显著负相关。[结论]鄂尔多斯高原沙地柏的液流通量随天气而变化。太阳辐射和水分是沙地柏液流通量的主要影响因子。建议当地加强对沙地柏灌丛的保护,防止由于过度水分消耗导致的植被退化
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of Botany,Chinese Academy Of Sciences
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Last time updated on 09/06/2022