Plant water use strategies in the Shapotou artificial sand-fixed vegetation of the southeastern margin of the Tengger Desert, northwestern China
Plant water use strategies in the Shapotou artificial sand-fixed vegetation of the southeastern margin of the Tengger Desert, northwestern China
复制标题
腾格里沙漠东南缘沙坡头人工固沙植被植物水分利用策略
DOI：
10.1007/s11629-018-5028-9
复制
发表时间：
2019
影响因子：
2.5
通讯作者：
Meng Fei
中科院分区：
文献类型：
--
作者：
Zhao Liang-ju;Wang Xiao-gang;Zhang Yu-cui;Xie Cong;Liu Quan-yu;Meng Fei
植物木质部水的稳定氧、氢同位素组成（δ 18 O和δD）及其潜在水源，可为研究植物水分来源、竞争相互作用和水分利用模式提供新的信息。以腾格里沙漠东南缘沙坡头人工固沙植被区的降水、地下水、土壤水和木质部水的δ 18 O和δD值为基础，研究了不同水源对花棒（Hedysarum scoparium，HS）、柠条（Caragana Korshinskii，CK）和油蒿（Artemisia ordosica，AO）3种植物的贡献。研究结果表明，不同生长季节土壤剖面水分含量及其对水分吸收的竞争平衡。结果表明，这些固沙植物已发展到相对稳定的阶段，并能根据环境条件调节自身的水分利用行为，从而加强了退化地区无灌溉原生灌木种植园的有效性。
Stable oxygen and hydrogen isotopic compositions (δ18O and δD) of plant xylem water and its potential water sources can provide new information for studying water sources, competitive interactions and water use patterns of plants. The contributions of different water sources to three plants,Hedysarum scoparium(HS),Caragana Korshinskii(CK) andArtemisia ordosica(AO), were investigated in the artificial sand-fixed vegetation of Shapotou, the southeastern margin of the Tengger Desert of northwestern China, based on meteorological data and δ18O and δD values of precipitation, groundwater, soil water and xylem water of HS, CK and AO. Our results indicated that water content throughout the soil profile and their competition balance for water uptake during different growth season. The results indicate that these sand-fixed plants have developed into a relatively stable stage and they are able to regulate their water use behavior as a response to the environmental conditions, which reinforces the effectiveness of plantation of native shrubs without irrigation in degraded areas.