气候变化领域集成服务门户(CCPortal): Transference of Robinia pseudoacacia water-use patterns from deep to shallow soil layers during the transition period between the dry and rainy seasons in a water-limited region

CCPortal

DOI	10.1016/j.foreco.2019.117727
	Transference of Robinia pseudoacacia water-use patterns from deep to shallow soil layers during the transition period between the dry and rainy seasons in a water-limited region
	Zhao Y.; Wang Y.; He M.; Tong Y.; Zhou J.; Guo X.; Liu J.; Zhang X.
发表日期	2020
ISSN	0378-1127
卷号	457
英文摘要	Soil water plays a critical role in determining plant survival and growth globally, especially in water-limited regions. This study explores water-use characteristics of Robinia pseudoacacia during the transition period between the dry and rainy seasons in the Chinese Loess Plateau (CLP). A stable isotope technique (δ18O and δD) and two complementary approaches (i.e., the direct inference method and the MixSIAR model) were used to distinguish water source changes during this transition period. Based on δ18O and δD distribution patterns, we subdivided a 500 cm soil profile into four potential water sources: shallow (0–40 cm), intermediate-shallow (40–120 cm), intermediate (120–200 cm) and deep (200–500 cm). During the transition period, R. pseudoacacia exhibited different water uptake patterns. In April 26.2% and 48.4% of water uptake derived from the 40 to 120 and 200 to 500 cm soil profile layers; in May, 21.5%, 24.5% and 37.4% of water was absorbed from the 0 to 40, 40 to 120 and 200 to 500 cm soil profile layers. In June and July, 51.6% and 53.6% of the water mainly derived from the 0 to 120 cm soil profile layer, respectively. During the dry season (April), the trend in water uptake shifted to the deep soil layer, potentially a key period for the onset of soil desiccation in this soil layer. As precipitation increased, the proportion of water uptake from the shallow and intermediate-shallow soil layers increased. Because water-use pattern characteristics could provide important information on the development of the dried soil layer (DSL), the stable isotope technique could help reveal the water sources used by trees while also offering insight into water movement mechanisms of local ecosystems. Given its usefulness, the application of the stable isotope technique should be expanded in analyzing practical ecohydrological issues that occur in deep soils in the future. © 2019 Elsevier B.V.
关键词	Landforms Sediments Soil moisture Dried soil layers Loess Plateau Robinia pseudo-acacia Stable isotopes Water uptake Isotopes deciduous tree desiccation dry season ecohydrology shallow soil soil profile stable isotope water uptake water use Characteristics Isotopes Layers Patterns Profiles Robinia Sediments China Loess Plateau Robinia pseudoacacia
语种	英语
来源机构	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/133106
推荐引用方式 GB/T 7714	Zhao Y.,Wang Y.,He M.,et al. Transference of Robinia pseudoacacia water-use patterns from deep to shallow soil layers during the transition period between the dry and rainy seasons in a water-limited region[J]. Forest Ecology and Management,2020,457.
APA	Zhao Y..,Wang Y..,He M..,Tong Y..,Zhou J..,...&Zhang X..(2020).Transference of Robinia pseudoacacia water-use patterns from deep to shallow soil layers during the transition period between the dry and rainy seasons in a water-limited region.,457.
MLA	Zhao Y.,et al."Transference of Robinia pseudoacacia water-use patterns from deep to shallow soil layers during the transition period between the dry and rainy seasons in a water-limited region".457(2020).