Transpiration Water Consumption by Salix matsudana and Populus simonii and Water Use Patterns at Different Developmental Stages on Sandy Land

作者：Qiaoting Zhai, Xu Li, Tiegang Zhang, Jianying Guo, Haibo Gao, Rui Jiao, Bo Yang · 发表于：Water · 年份：2023 · DOI：10.3390/w15244255 · 被引用次数：5 · 研究领域：Plant Water Relations and Carbon Dynamics、Tree-ring climate responses、Forest ecology and management

Moisture plays a pivotal role in the establishment of vegetation in sandy areas, underscoring the need to comprehend the water utilization strategies employed by established trees for the judicious use of water resources. Despite this significance, there exists a research gap concerning the water uptake patterns and consumption disparities between the dominant trees, namely the dry willow (Salix matsudana) and small-leafed poplar (Populus simonii), in the Mu Us sandy region. Consequently, our study sought to investigate the water utilization patterns and transpiration water consumption of these two plants. This was achieved through the analysis of hydrogen and oxygen isotope compositions in xylem water, soil water, and groundwater, coupled with the assessment of stem flow rates of tree trunks. The findings reveal that both Salix matsudana and Populus simonii exhibited variations in soil water content with soil depth, characterized by an initial increase followed by a subsequent decrease. During the months of July, August, and September, both species demonstrated the ability to absorb water from multiple sources concurrently. Specifically, Salix matsudana and Populus simonii predominantly utilized middle and shallow soil water sources in July and September, respectively. However, in August, both species primarily relied on shallow soil water for absorption. Over the period from July to September, the sap flow rate of Salix matsudana surpassed that of Populus simonii by 1888.2 ...