Skip to Main Content
Effects of nutrient additions on ecosystem carbon cycle in a Puerto Rican tropical wet forestAuthor(s): YIQING LI; MING XU; XIAOMING ZOU
Source: Global Change Biology 11, :1–10,
Publication Series: Miscellaneous Publication
PDF: View PDF (506 B)
DescriptionWet tropical forests play a critical role in global ecosystem carbon (C) cycle, but C allocation and the response of different C pools to nutrient addition in these forests remain poorly understood. We measured soil organic carbon (SOC), litterfall, root biomass, microbial biomass and soil physical and chemical properties in a wet tropical forest from May 1996 to July 1997 following a 7-year continuous fertilization. We found that although there was no significant difference in total SOC in the top 0–10cm of the soils between the fertilization plots (5.42 0.18 kgm2) and the control plots(5.27 0.22 kgm2), the proportion of the heavy-fraction organic C in the total SOC was significantly higher in the fertilized plots (59%) than in the control plots (46%) (Po0.05). The annual decomposition rate of fertilized leaf litter was 13% higher than that of the control leaf litter.We also found that fertilization significantly increased microbial biomass (fungi1bacteria) with 952 48mgkg1soil in the fertilized plots and 755 37mgkg1soil in the control plots. Our results suggest that fertilization in tropical forests may enhance long-term C sequestration in the soils of tropical wet forests.
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationLI, YIQING; XU, MING; ZOU, XIAOMING. 2006. Effects of nutrient additions on ecosystem carbon cycle in a Puerto Rican tropical wet forest. Global Change Biology 11, :1–10,
Keywordsdecomposition, forest floor mass, litterfall, long-term carbon, microbial biomass, soil carbon
- Comparing soil organic carbon dynamics in plantation and secondary forest in wet tropics in Puerto Rico
- Soil ecological interactions: comparisons between tropical and subalpine forests
- Microbial biomass and bacterial functional diversity in forest soils: effects of organic matter removal, compaction, and vegetation control
XML: View XML