Effects of simulated nitrogen deposition on soil respiration in a Neosinocalamus affinis plantation in rainy area of west China

From December 2007 to November 2008, an in situ experiment was conducted to study the effects of simulated nitrogen deposition on the soil respiration in a Neosinocalamus affinis plantation in Rainy Area of West China. Four treatments were installed, i.e., 0 (CK), 50, 150, and 300 kg N x hm(-2) x a(...

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Published inYing yong sheng tai xue bao Vol. 21; no. 7; p. 1649
Main Authors Li, Ren-hong, Tu, Li-hua, Hu, Ting-xing, Zhang, Jian, Lu, Yang, Liu, Wen-ting, Luo, Shou-hua, Xiang, Yuan-bin
Format Journal Article
LanguageChinese
Published China 01.07.2010
Subjects
Bambusa - growth & development
Carbon Dioxide - metabolism
China
Computer Simulation
Ecosystem
Environmental Pollutants - analysis
Nitrogen - analysis
Plant Transpiration - physiology
Rain
Seasons
Soil - analysis
Water - metabolism
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Summary:From December 2007 to November 2008, an in situ experiment was conducted to study the effects of simulated nitrogen deposition on the soil respiration in a Neosinocalamus affinis plantation in Rainy Area of West China. Four treatments were installed, i.e., 0 (CK), 50, 150, and 300 kg N x hm(-2) x a(-1), and soil respiration rate was measured by infrared gas analyzer. In the test plantation, soil respiration rate had a distinct seasonal fluctuation, with the highest (3.36 +/- 0.20 micromol x m(-2) x s(-1)) by the end of July and the lowest by the end of February (0.33 +/- 0.07 micromol x m(-2) x s(-1)). There was a significant exponential relationship (P<0.001) between soil respiration rate and soil temperature, and the temperature at 10 cm soil depth explained 91.6% of the seasonal change of soil respiration. However, less relationship was observed between soil respiration rate and soil moisture content (R2 = 0.0758). From June to November 2008, the contribution of root respiration to total soil respiration r
ISSN:1001-9332