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LAGGING EFFECT OF NUTRIENT RELEASE IN TROPICAL SEASONAL FOREST SOILS IN XISHUANGBANNA, SOUTHWEST CHINA

Mani, S and Cao, M (2016) LAGGING EFFECT OF NUTRIENT RELEASE IN TROPICAL SEASONAL FOREST SOILS IN XISHUANGBANNA, SOUTHWEST CHINA. In: JOURNAL OF TROPICAL FOREST SCIENCE, 28 (3). pp. 217-226.

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Abstract

This study assessed how litterfall production and nutrient concentration of leaf litter and soil vary with seasonality of rainfall in primary and secondary tropical forests of south-west China. A total of five 20 m x 20 m plots were established in each of the primary and secondary tropical forests. Leaf litter and top soil were sampled from each plot at monthly intervals for one year. Total annual litterfall production was 6.03 and 8.29 tonnes ha(-1) year(-1) in the primary and secondary tropical forests respectively. Total litterfall showed marked peaks at the end of the dry season with smaller peaks at the end of the rainy season. Leaf nutrients (phosphorus, potassium and calcium) were slightly varied between the two sites. Soil nutrients peaked in the middle of the rainy season, i.e. about two months later than the onset of the rainy season, suggesting a lagging effect of nutrient release. Consequently, we postulated that there was nutrient pulse in tropical seasonal forest soils every year, which was driven by alternating dry and rainy seasons in the predominantly monsoon climate areas.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the FOREST RESEARCH INST MALAYSIA, PUBLICATION UNIT, KEPONG, KUALA LUMPUR 52109, MALAYSIA
Keywords: Litterfall; leaf nutrients; soil nutrients; seasonal variation; tropical forests
Department/Centre: Division of Biological Sciences > Centre for Ecological Sciences
Depositing User: Id for Latest eprints
Date Deposited: 24 Aug 2016 10:18
Last Modified: 24 Aug 2016 10:18
URI: http://eprints.iisc.ac.in/id/eprint/54427

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