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- Title
Decomposition responses of pine (Pinus massoniana) needles with two different nutrient-status to N deposition in a tropical pine plantation in southern China.
- Authors
Jiangming Mo; Hua Fang; Weixing Zhu; Guoyi Zhou; Xiankai Lu; Yunting Fang
- Abstract
•The effect of nitrogen (N) deposition on the decomposition of pine (Pinus massoniana) needles in a tropical pine plantation was studied. The pine needles with two different nutrient status (nutrient-rich and nutrient-poor) were used, followed by 3-levels of N treatments (Control: no N addition, Low-N: 5 g N m-2 y-1, and Medium-N: 10 g N m-2 y-1 experimental inputs), which had been applied for 26 months continuously before this experiment and continued throughout the decomposition measurement. • The main objective was to test the hypothesis that decomposition of nutrient-rich needles would be more sensitive to cumulative N deposition than the decomposition of nutrient-poor needles. • Nitrogen addition had negative effect on mass loss, and the release of N and P from decomposing nutrient-rich needles but little or no effect on the decomposition of nutrient-poor needles. In addition, a negative effect in the initial decomposition phase and a positive effect in later decay stages were found on C release. The negative effect was stronger on nutrient-rich needles than on nutrient-poor needles, but the reverse was true for the positive effect. • Our results suggest that response of litter decomposition to N deposition may vary depending on the nutrient status of the litter.
- Subjects
CHINA; PINE needles; BIODEGRADATION; NITROGEN; PLANT nutrients; NUTRIENT uptake
- Publication
Annals of Forest Science (EDP Sciences), 2008, Vol 65, Issue 4, p405p1
- ISSN
1286-4560
- Publication type
Article
- DOI
10.1051/forest:2008017