Effect of nitrogen and phosphorus addition on litter decomposition and nutrients release in a tropical forest
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Effect of nitrogen and phosphorus addition on litter decomposition and nutrients release in a tropical forest Jingfan Zhang & Jian Li & Yingxu Fan & Qifeng Mo & Yingwen Li & Yongxing Li & Zhian Li & Faming Wang
Received: 12 March 2020 / Accepted: 17 July 2020 # Springer Nature Switzerland AG 2020
Abstract Aims Through the nutrient fertilization experiment, we aimed to understand how litter decomposition and nutrient release response to the elevated soil N and P availability. Methods A factorial fertilization experiment was conducted in a tropical forest in South China. Leaf litters of five species (Acacia auriculaeformis, Syzygium levinei, Carallia brachiate, Schefflera octophylla, Aphanamixis polystachya) and their mixed sample were put into litter bags in plots fertilized with N, P, or N and P together and collected every three months during the 18-months
decomposition. Mass loss of leaf litters and nutrients content were measured. Results N addition decreased decomposition rates by 15–40%, and the magnitude was species-specific, while P addition had no significant influence on the litter decomposition of all species. Decomposition rate of leaf litter were lower in species with higher C/P ratios and cellulose content. All types of litters served as a net N source during the decomposition. The amounts of mineral elements released during the decomposition followed the order: K > Mg > Ca, and N addition accelerated the Ca and Mg release from litters.
Responsible Editor: Alfonso Escudero. Electronic supplementary material The online version of this article (https://doi.org/10.1007/s11104-020-04643-9) contains supplementary material, which is available to authorized users. J. Zhang : Y. Fan : Y. Li : Y. Li : Z. Li : F. Wang Xiaoliang Research Station of Tropical Coastal Ecosystems, Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, and the CAS engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou 510650, People’s Republic of China J. Zhang : Y. Fan University of Chinese Academy of Sciences, Beijing 100049, China J. Zhang : Z. Li : F. Wang (*) Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou), Guangzhou 511458, People’s Republic of China e-mail: [email protected]
J. Li Shenzhen Key Laboratory for Orchid Conservation and Utilization, The National Orchid Conservation Center of China and The Orchid Conservation and Research Center of Shenzhen, Shenzhen 518114, China Q. Mo Guangdong Key Laboratory for Innovative Development and Utilization of Forest Plant Germplasm, College of Forestry and Landscape Architecture, South China Agricultural University, Guangzhou 510642, People’s Republic of China
Plant Soil
Conclusions The result suggests that future high N deposition can reduce the tropical forest litter decomposition rate but enhance the mineral nutrients release, which may contribute to higher soil C sequestration, while soil P availability does not
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