Deep soil water use of old-aged vegetation (17- to 36-year stand age) after the formation of dried soil layers based on in situ monitoring

• DOI: 10.1016/j.ejrh.2023.101446
• Publication Date: 2023-06-16T17:34:57Z
• Authors: Guangjie Chen; Qifan Wu; Yanbo Wang; Yihong Zhao; Haiyang Yu; Yunqing Lu; Hao Feng; Min Li; Kadambot H.M. Sid...
• Keywords: Pinus tabulaeformis; Platycladus; Loess plateau

Xindiangou Watershed in Suide, the Loess Plateau, China Deep soil water (DSW) is gradually depleted as vegetation stand age increases, resulting dried layers (DSLs) Plateau China. However, it unclear whether old-aged continues to use DSW under DSLs. This study monitored five times (2001, 2005, 2006, 2007, 2020) deep profile for three common types [Pinus tabuliformis Carr. (P. tabuliformis), Caragana korshinskii Kom. (C. korshinskii), Platycladus orientalis L. Franco orientalis)] planted 1985. In 2020, we measured content, root characteristics, and particle composition investigate status influencing factors. Soil 2–10 m layer did not significantly differ from 17- 36-year (p < 0.05), indicating that no longer used with a strong desiccation index m. P. (23- stand) 17–22 an average consumption of 11.6 mm year–1, while C. DSW. long-term depletion correlated clay content. showed unfavorable resources vegetation, further measures conduct selective thinning or complementary planting considered alleviate deficit.