Short-term Effects of Nitrogen Deposition on Soil Physical and Chemical Properties of Tibetan Forest-Grassland Landscape Boundary

• Published in: Animal husbandry and feed science Vol. 10; no. 4; pp. 249 - 256
• Main Authors: Yanhui, Ye, Yi, Gao, Yunlong, Liu, Yanying, Han, Hong, Ye
• Format: Journal Article
• Language: English
• Published: Cranston Wu Chu (USA-China) Science and Culture Media Corporation 01.08.2018
• Subjects: Animal husbandry; Aridity; Biodiversity; Burning; Carbon; Chemical properties; Climate change; Deposition; Dissolved organic carbon; Environmental changes; Fertilizers; Foothills; Forest soils; Forestry; Forests; Fossil fuels; Grasslands; Heterogeneity; Human influences; Landscape; Nitrogen; Nitrogen compounds; Nutrients; Organic chemistry; Organic soils; Plantations; Rivers; Soil chemistry; Soil nutrients; Soil properties; Studies; China; Tibet
• ISSN: 1943-9911
• DOI: 10.19578/j.cnki.ahfs.2018.04.009

Keywords Nitrogen deposition; Linzhi; Boundary soil; Soil nutrients; Soil dissolved organic carbon; Forest-grassland Nitrogen deposition is another concerned environmental issue in recent decades. Since the middle of the 20· century, the release of reactive nitrogen compounds into the atmosphere by human activities such as the burning of fossil fuels, the production arid use of chemical nitrogen fertilizer, and the rapid development of animal husbandry, etc., has surged, and atmospheric nitrogen deposition also increases rapidly111. Due to the high environmental heterogeneity, biodiversity and sensitivity to environmental changes within landscape boundaries, their changes can serve as indicators of environmental changes. [...]landscape boundary has important theoretical significance in the study of global changes. Due to the special geographical and climatic environment, Tibet has become a typical vulnerable area of ecological environment and a sensitive zone of climate change, which has superior response to climate change and human disturbance. [...]it is an ideal place for studying the impact of global changes on landscape boundary1·2"1®. Currently, the effects of nitrogen. deposition on soil have been largely studied at home and abroad, while the research on nitrogen deposition in Tibet is still in the preliminary stage. [...]one-year short-term nitrogen deposition simulation experiment was carried out in the forest-grassland boundary of Unzhi County, Tibet, and the response of soil nutrients and DOC to nitrogen deposition in forest-grassland boundary was studied, in order to provide scientific and basic data for better understanding and evaluating the impacts of atmospheric nitrogen deposition on soil nutrients and DOC in the area. 1 Overview of Survey Area and Methods 1.1 Overview of survey area Linzhi County locates in the southeastern foothills of Nyenchen tanglha in the Qing- hai-'Tibet plateau, the confluence of the Yarlung Zangbo River and the Niyang River, 29·21' N-30°15' N, 93°27' E-95°17' E. It is adjacent to Motuo County in the east and Miling County in the south, and connects to Gongbujiangda County in the west and northwest region, and Bond County in the north and northeast region.