Soil CO2 efflux in relation to soil temperature and relative humidity in gmelina mahogany and pine stands in Malaysia

Cindy U. S., . and Hazandy A. H., . and Ahmad-Ainuddin N., . and Mohd-Kamil I., . Soil CO2 efflux in relation to soil temperature and relative humidity in gmelina mahogany and pine stands in Malaysia. pp. 207-215. ISSN 0128-1283

Soil CO2 efflux in mature plots of Gmelina arborea and Swietenia macrophylla (exotic broad-leaved trees) and Pinus caribaea (exotic conifer) was measured monthly in relation to soil temperature air temperature and relative humidity from January till March 2016. Soil bulk density pH total C total N and soil organic C were also measured at 0“15 and 15“30 cm depths. Soil CO2 efflux was significantly different between plots: gmelina mahogany pine (0.76 0.04 0.49 0.02 and 0.40 0.01 g CO2 m-2 h-1 respectively). Regression analysis revealed significant positive correlation of soil CO2 efflux with soil temperature in the gmelina plot but no correlation with soil relative humidity in all three plots. Significant negative correlation was found between soil CO2 efflux and soil temperature in the pine plot which indicated the influence of other factors on soil CO2 efflux in that plot. Monthly variations in soil relative humidity and soil properties of gmelina and pine plots were examined for possible influences on soil CO2 efflux and temperature sensitivity (Q10). Q10 of soil CO2 efflux in the gmelina plot (1.19) was far higher than in the mahogany and pine plots (0.79 and 0.70 respectively).

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v30n2/2...

Abstract

Soil CO2 efflux in mature plots of Gmelina arborea and Swietenia macrophylla (exotic broad-leaved trees) and Pinus caribaea (exotic conifer) was measured monthly in relation to soil temperature air temperature and relative humidity from January till March 2016. Soil bulk density pH total C total N and soil organic C were also measured at 0“15 and 15“30 cm depths. Soil CO2 efflux was significantly different between plots: gmelina mahogany pine (0.76 0.04 0.49 0.02 and 0.40 0.01 g CO2 m-2 h-1 respectively). Regression analysis revealed significant positive correlation of soil CO2 efflux with soil temperature in the gmelina plot but no correlation with soil relative humidity in all three plots. Significant negative correlation was found between soil CO2 efflux and soil temperature in the pine plot which indicated the influence of other factors on soil CO2 efflux in that plot. Monthly variations in soil relative humidity and soil properties of gmelina and pine plots were examined for possible influences on soil CO2 efflux and temperature sensitivity (Q10). Q10 of soil CO2 efflux in the gmelina plot (1.19) was far higher than in the mahogany and pine plots (0.79 and 0.70 respectively).

[error in script]

Item Type:	Article
AGROVOC Term:	Gmelina arborea
AGROVOC Term:	Swietenia macrophylla
AGROVOC Term:	Pinus caribaea
AGROVOC Term:	Forest stands
AGROVOC Term:	Coniferous forests
AGROVOC Term:	Broad-leaved forests
AGROVOC Term:	Tropical forests
AGROVOC Term:	Climate change
AGROVOC Term:	Environmental impact
AGROVOC Term:	Land use
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:29
URI:	http://webagris.upm.edu.my/id/eprint/24778

Actions (login required)

View Item