草业学报2024，Vol.33Issue(7)：205-214,10.DOI:10.11686/cyxb2023328
积雪增加对青藏高原高寒草甸土壤磷有效性的影响
Effects of snow addition on soil phosphorus availability in an alpine meadow of the Tibetan Plateau
摘要
Abstract
Deeper snow cover in winter may change soil phosphorus cycling in alpine meadow grassland ecosystems through effects on soil temperature and moisture. A field experiment involving snow addition was conducted at an alpine meadow in the permafrost region of the Tibetan Plateau. Snow fences were used to contain snow to simulate increased depth of snow cover. The results showed:1) Snow addition significantly increased temperature and moisture in the top 0-10 cm soil horizon in the growing season (from May to September). 2) Snow addition significantly increased soil total phosphorus,available phosphorus and Al-P in the 0-10 cm and 10-20 cm soil horizons,but decreased soil organic phosphorus and Ca2-P contents. The Ca8-P content decreased in the 0-10 cm soil depth and increased in the 10-20 cm soil depth. 3) Redundancy analysis showed that the key factors affecting soil phosphorus forms were soil total nitrogen,organic matter and soil hydrothermal state. Therefore,it was confirmed that snow addition improved soil organic phosphate mineralization rate by changing soil physical and chemical properties,including total nitrogen content,organic matter content,hydrothermal state and soil phosphatase activity. Snow addition also promoted phosphorus release from slow-acting phosphorus sources such as Ca8-P and Al-P,and improved soil phosphorus availability.关键词
青藏高原/积雪增加/高寒草甸/磷有效性Key words
Qinghai-Tibet Plateau/snow addition/alpine meadow/phosphorus availability引用本文复制引用
谭湘蛟,董逵才,张华,唐川川,杨燕..积雪增加对青藏高原高寒草甸土壤磷有效性的影响[J].草业学报,2024,33(7):205-214,10.基金项目
中国科学院战略先导项目(XDA23060601)和青海省"昆仑英才·高端创新创业人才"计划项目资助. （XDA23060601）
