Water source and transmission in Haloxylon ammodendron in the desert margin of the Manas River Basin, China

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-03-03 DOI:10.1163/22244662-BJA10022

Wanjing Li, Li Zhao, Guang Yang, Ke Yan, Xinlin He, Yongli Gao, Lianqing Xue, Fadong Li, Wu Yage

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引用次数: 1

Abstract

Analysis of water source and moisture transfer characteristics of desert plants is of great significance for ecological restoration in arid areas. In this study, the water source utilized by the desert plant, Haloxylon ammodendron, was analysed using the stable isotope technique, and the water transportation characteristics were obtained based on the proportional heat balance method under different weather conditions. The results showed that (1) before raining, the moisture of H. ammodendron mainly relied on groundwater (the average contribution rate was 34.14%) and on soil water located at a depth of 120–180 cm (the average contribution rate was 29.87%). After the rain, H. ammodendron mainly absorbed soil water from a depth of 60–120 cm (the average contribution rate was 33.19%) and groundwater (the average contribution rate was 30.67%); (2) the stem flow of H. ammodendron showed an obvious diurnal variation, showing a “midday rest” phenomenon. The stem flow showed a peak value, and in sunny days, it was ~2 fold higher than that in cloudy days. (3) The stem flow rate of H. ammodendron varied regularly overtime as follows: August > July > September > June > May, and the meteorological factors affecting its stem flow were solar radiation (0.826) > atmospheric temperature (0.598) > humidity (-0.573). The results provide basic support for the ecological conservation of the desert plant H. ammodendron, while also having important implications for ecological restoration in arid regions.

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马那斯河流域沙漠边缘梭梭的水源与传播

分析沙漠植物的水源和水分传递特性，对干旱区生态恢复具有重要意义。本研究采用稳定同位素技术对沙漠植物梭梭利用的水源进行了分析，并采用比例热平衡法获得了不同天气条件下梭梭的水分输送特征。结果表明：（1）雨前梭梭的水分主要依赖于地下水（平均贡献率为34.14%）和120–180深度的土壤水分 cm（平均贡献率为29.87%） cm（平均贡献率为33.19%）和地下水（平均贡献度为30.67%）；（2）梭梭树干流量日变化明显，呈现午休现象。树干流量呈现峰值，晴天比阴天高约2倍。（3）随着时间的推移，梭梭茎流量呈规律性变化：8月>7月>9月>6月>5月，影响其茎流量的气象因子为太阳辐射（0.826）>大气温度（0.598）>湿度（-0.573），同时对干旱地区的生态恢复也具有重要意义。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.