Grazing increases litter decomposition rate but decreases nitrogen release rate in an alpine meadow
Yi Sun,Xiong Z. He,Fujiang Hou,Zhaofeng Wang,and Shenghua Chang
Yi Sun
State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory
of Grassland Livestock Industry Innovation, Ministry of Agriculture, College
of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou,
730000, Gansu, China
State Key Laboratory of Cryospheric Sciences, Cold and Arid Regions
Environmental and Engineering Research Institute, Chinese Academy of
Sciences, 320 Donggang West Road, Lanzhou 730000, China
Xiong Z. He
School of Agriculture and Environment, College of Science, Massey
University, Private Bag 11-222, Palmerston North, New Zealand
State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory
of Grassland Livestock Industry Innovation, Ministry of Agriculture, College
of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou,
730000, Gansu, China
Zhaofeng Wang
State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory
of Grassland Livestock Industry Innovation, Ministry of Agriculture, College
of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou,
730000, Gansu, China
Shenghua Chang
State Key Laboratory of Grassland Agro-ecosystems, Key Laboratory
of Grassland Livestock Industry Innovation, Ministry of Agriculture, College
of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou,
730000, Gansu, China
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To investigate how grazing alters litter composition, quality and decomposition, we collected litter from grazing (GP) and grazing exclusion paddocks (GEP) and incubated them in situ and across sites. Grazing increased litter N and grazing exclusion increased litter mass of palatable species and promoted SOC. Litter decomposed faster in GP and N was opposite. Site environment had more impact on litter decomposition. Results may be helpful in developing strategies to restore degraded grasslands.
To investigate how grazing alters litter composition, quality and decomposition, we collected...
