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《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

卷:

第46卷

期数:

2024年第06期

页码:

804-815

栏目:

环境与可持续发展

出版日期:

2024-12-15

文章信息/Info

Title:

Water Source of Salix Matsudana and Populus Simonii in Mu Us Sandy Land, China Based on Stable Oxygen Isotopes

文章编号:

1672-6561(2024)06-0804-12

作者:

翟巧婷¹; 张铁钢¹; 许 丽^2*; 高海波³; 杨 波³; 赵春光³; 杨晓东³

(1. 中国水利水电科学研究院 内蒙古阴山北麓草原生态水文国家野外科学观测研究站,内蒙古 呼和浩特 010020; 2. 内蒙古农业大学 沙漠治理学院,内蒙古 呼和浩特 010018; 3. 鄂尔多斯市水利事业发展中心,内蒙古 鄂尔多斯 017000)

Author(s):

ZHAI Qiao-ting¹;  ZHANG Tie-gang¹;  XU Li^2*;  GAO Hai-bo³;  YANG Bo³;  ZHAO Chun-guang³;  YANG Xiao-dong³

(1. Yinshanbeilu Grassland Eco-hydrology National Observation and Research Station, China Institute of Water Resources and Hydropower Research, Hohhot 010020, Inner Mongolia, China; 2. College of Desert Control Science and Engineering, Inner Mongolia Agricultural University, Hohhot 010018, Inner Mongolia, China; 3. Ordos Water Conservancy Development Center, Ordos 017000, Inner Mongolia, China)

关键词:

植物水分利用;  旱柳;  小叶杨;  稳定同位素;  MixSIAR模型;  吸水来源;  地下水;  毛乌素沙地

Keywords:

plant water use;  Salix matsudana;  Populus simonii;  stable isotope;  MixSIAR model;  water absorption source;  groundwater;  Mu Us sandy land

分类号:

S157

DOI:

10.19814/j.jese.2024.04011

文献标志码:

A

摘要:

确定干旱地区不同植被的水分来源情况,掌握不同水分条件下植被对潜在水源的利用率,对毛乌素沙地提高水资源利用效率以及更加合理地利用水资源具有重要意义。通过分析旱柳(Salix Matsudana)和小叶杨(Populus Simonii)木质部水、土壤水和地下水的氧同位素组成,采用贝叶斯混合(MixSIAR)模型量化旱柳和小叶杨对土壤水和地下水的利用率。结果表明:旱柳和小叶杨各月土壤含水量和土壤水δ¹⁸O值均随深度的增加呈现先增加后减少的趋势。生长季旱柳和小叶杨会调节各层土壤水或地下水的利用率适应环境变化。在降雨量较少时,旱柳和小叶杨对各层土壤水的利用率较为均衡,分别为21.6%～28.2%和22.6%～28.8%; 当降雨量较多时,旱柳和小叶杨主要的水分来源均为浅层土壤水,利用率最大可达60.1%和52.1%。研究反映了旱柳和小叶杨对毛乌素沙地的水分适应情况,确定了干旱地区人工植被的水分利用模式,掌握了不同水分条件下植被对潜在水源的利用率,表明未来毛乌素沙地人工植被建设中要以水定绿,灌草结合,尽量少选择乔木等高耗水植物种作为固沙造林树种。

Abstract:

It is of great significance to determine the water source of different vegetations in arid area and to grasp the utilization rate of potential water sources by vegetation under different water conditions for improving the utilization efficiency of water resources and more rational utilization of water resources in Mu Us sandy land. It is of great significance to understand the water sources of Salix matsudana(S. matsudana) and Populus simonii(P. simonii) in Mu Us sandy land for the efficient utilization of water resources. By analyzing the oxygen isotope composition of branch water, soil water and groundwater of S. matsudana and P. simonii, the Bayesian mixture(MixSIAR)model was used to quantify the water utilization rate of S. matsudana and P. simonii. The results show that the monthly soil water content and soil water δ¹⁸O values of S. matsudana and P. simonii increase first and then decrease with the increasing depth. In the growing season, S. matsudana and P. simonii adjust the utilization ratio of soil water and groundwater according to the environment change. When the rainfall is less, the utilization rate of soil water in each layer of S. matsudana and P. simonii is more balanced, and the utilization rate is 21.6%-28.2% and 22.6%-28.8%, respectively. When the rainfall is more, the main water source of S. matsudana and P. simonii is shallow soil water, and the utilization rate is up to 60.1% and 52.1%. It reflects the water adaptation of S. matsudana and P. simonii in Mu Us sandy land, determines the water use mode of artificial vegetation in arid area, and grasps the utilization rate of vegetation to potential water sources under different water conditions. It shows that in the future construction of artificial vegetation in Mu Us sandy land, water should be used to fix green, shrub and grass should be combined, and high water-consuming plant species such as trees should be selected as sand-fixing afforestation tree species as little as possible.

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备注/Memo

备注/Memo:

收稿日期:2024-04-09; 修回日期:2024-07-30
基金项目:内蒙古自治区科技计划项目(2022YFHH0063,2021GG0198)
*通信作者:许 丽(1965-),女,内蒙古巴彦淖尔人,教授,农学博士,E-mail:xulinmg@163.com。

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