Effects of nitrogen addition on the characteristics of foliar and soil ecological stoichiometry in Xishuangbanna Tropical Rainforest Southwest China

Niu J., . and Lu T. P., . and Lin Y. J., . and Zhang W. X., . Effects of nitrogen addition on the characteristics of foliar and soil ecological stoichiometry in Xishuangbanna Tropical Rainforest Southwest China. pp. 19-7. ISSN 0128-1283

Xishaungbanna tropical rainforest (XTR) is the most intact tropical rainforest in China and is the only oasis at around 21 degrees north latitude. The purpose of this study was to explore the effects of nitrogen (N) exogenous input on ecological stoichiometry of soil and foliar and to assess the impact on the ecosystem of XTR. The results showed that the N content and nitrogen:phosphorus (N:P) in soil of XTR were increased significantly in different levels of N addition especially in the low N addition. The P content in soil and leaves was generally reduced or flat compared with those before N addition. Meanwhile N:P of soil had a significant relationship with the N and P content after N addition. However the correlated coefficient between N:P and N P content of plant leaves was significantly reduced by the N addition respectively. This indicated that the impact of N deposition on the XTR ecosystem is very significant. Therefore increase of N deposition may intensify the limiting effect of P in ecosystems and aggravate the patchiness and degradation of XTR ecosystem due to global warming.

Full text available from: Official URL: https://info.frim.gov.my/infocenter_applications/j...

Abstract

Xishaungbanna tropical rainforest (XTR) is the most intact tropical rainforest in China and is the only oasis at around 21 degrees north latitude. The purpose of this study was to explore the effects of nitrogen (N) exogenous input on ecological stoichiometry of soil and foliar and to assess the impact on the ecosystem of XTR. The results showed that the N content and nitrogen:phosphorus (N:P) in soil of XTR were increased significantly in different levels of N addition especially in the low N addition. The P content in soil and leaves was generally reduced or flat compared with those before N addition. Meanwhile N:P of soil had a significant relationship with the N and P content after N addition. However the correlated coefficient between N:P and N P content of plant leaves was significantly reduced by the N addition respectively. This indicated that the impact of N deposition on the XTR ecosystem is very significant. Therefore increase of N deposition may intensify the limiting effect of P in ecosystems and aggravate the patchiness and degradation of XTR ecosystem due to global warming.

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Item Type:	Article
AGROVOC Term:	Tropical rain forests
AGROVOC Term:	Leaf analysis
AGROVOC Term:	Soil analysis
AGROVOC Term:	Forest soils
AGROVOC Term:	Phosphorus
AGROVOC Term:	Nitrogen
AGROVOC Term:	Nutrient intake
AGROVOC Term:	Soil nutrient content
AGROVOC Term:	Nutrient availability
AGROVOC Term:	Foliar nutrition
Depositing User:	Mr. AFANDI ABDUL MALEK
Last Modified:	24 Apr 2025 00:54
URI:	http://webagris.upm.edu.my/id/eprint/8845

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