Decomposition dynamics and ecological stoichiometry of Quercus acutissima and Pinus densiflora litter in the Grain to Gr
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ORIGINAL PAPER
Decomposition dynamics and ecological stoichiometry of Quercus acutissima and Pinus densiflora litter in the Grain to Green Program Area of northern China Jianni Sun1 • Peng Gao1 • Haidong Xu1 • Cheng Li1 • Xiang Niu2
Received: 29 June 2018 / Accepted: 3 September 2018 The Author(s) 2019
Abstract Litter decomposition and ecological stoichiometry of nutrient release is an important part of material cycling and energy flow in forest ecosystems. In a study of the ecological stoichiometry and nutrient release during litter decomposition in a pine–oak forest ecosystem of the Grain to Green Program (GTGP) area of northern China, a typical pine and oak species (PDS: Pinus densiflora Sieb., QAC: Quercus acutissima Carr.) were selected in the Taiyi Mountain study area. The ecological stoichiometry characteristics of carbon (C), nitrogen (N) and phosphorus (P) and litter decomposition dynamics were studied by field sampling and quantitative analyses. The results showed the following. (1) The decomposition dynamics of both litters
Project funding The study was subsidized by Grants from the Natural Science Foundation of Shandong Province of China (No. ZR2016CM49) and the Special Fund for Forestry Scientific Research in the Public Interest (No. 201404303-08). This work was supported by CFERN and BEIJING TECHNO SOLUTIONS Award Funds for excellent academic achievements.
was slow-fast-slow. The most important climatic factor affecting the litter decomposition rate from May to October was precipitation and temperature from November to April of the following year. (2) Throughout the 300-day study, in both litters, C of the two litters was released, N first accumulated and was then released, and P exhibited a release-accumulate-release pattern. (3) C:P was significantly higher than C:N and N:P (p \ 0.05); the C:N of PSD litter was higher than that of QAC (p \ 0.05), but the N:P of QAC litter was higher than that of PSD litter (p \ 0.05). The C:N of both litters was very high in the study area, indicating that the nutrient release ability during litter decomposition in the two typical pine–oak forest ecosystems was relatively weak; therefore, more attention should be paid to nitrogen-fixing species and mixed forests in the GTGP area of northern China. Keywords Decomposition dynamics Ecological stoichiometry Litter Pinus densiflora Quercus acutissima Grain to Green Program (GTGP)
The online version is available at http://www.springerlink.com Corresponding editor: Chai Ruihai. & Peng Gao [email protected] 1
Forestry College, Mountain Tai Forest Ecosystem Research Station of State Forestry Administration, Shandong Provincial Key Laboratory of Soil Erosion and Ecological Restoration, Shandong Agricultural University, Tai’an 271018, Shandong, People’s Republic of China
2
Research Institute of Forest Ecology, Environment and Protection, Chinese Academy of Forestry, Beijing Collaborative Innovation Center for Eco-Environmental Improvement With Forestry and Fruit Trees, Beijing 100091, People’s Republic of C
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