Effects of ecological restoration measures on vegetation and soil properties in semi-humid sandy land on the southeast Qinghai-Tibetan Plateau, China

作者：Jinjiao Hu, Jinjiao Hu, Qingping Zhou, Quanheng Cao, Jian Hu, Jian Hu · 发表于：Global Ecology and Conservation · 年份：2022 · DOI：10.1016/j.gecco.2022.e02000 · 被引用次数：45 · 研究领域：Soil erosion and sediment transport、Soil Carbon and Nitrogen Dynamics、Peatlands and Wetlands Ecology

Land desertification directly impacts the services and functions of grassland ecosystems globally, especially in alpine regions. Ecological restoration measures (e.g., erecting fences, establishing plant barriers, and planting native shrubs and grasses) are essential for combating desertification and restoring functions of degraded alpine grassland on the Qinghai-Tibetan Plateau (QTP). However, the combined effects of ecological restoration measures on the plant-soil system have yet to be systematically evaluated and compared in the alpine-cold semi-humid area. In this study, we compared vegetation and soil properties upon the application of three typical restoration measures [i.e., fencing enclosure (FE), establishing Salix cupularis sandy barrier (SCSB), and establishing Salix cupularis sandy barrier plus planting grasses (SCSBPPG)], along with severely degraded sandy land as a control (CK). Soil physicochemical (i.e., particle-size distribution, water content (SWC), bulk density (SBD), soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), and total potassium (TK)), and microbiological properties [i.e., microbial biomass carbon (MBC), nitrogen (MBN), phosphorus (MBP), urease, dehydrogenase, catalase, acid phosphatase, polyphenol oxidase, and β-glucosidase activities] were measured in soil layers at depths of 0–10, 10–20, and 20–30 cm. The results showed that the vegetation coverage, aboveground biomass, Margalef richness index, and Shannon–Weiner diversity ...