Carbon management index of tropical peat soil planted with various crops

Ahmad Husni M.H., . and Hafsah H.N., . and Radziah O., . (2007) Carbon management index of tropical peat soil planted with various crops. [Proceedings Paper]

Tropical peatland constitutes over 80 of the global area and can stores up to 20 of global peatland carbon. In Malaysia there are about 2.3-2.7 million ha of peatland area and about 1.7 million ha is found in Sarawak. The carbon sink of a peatland is labile and sensitive to disturbance in environmental conditions. This study was conducted to investigate the changes in labile carbon of different land use on peat thus to establish the Carbon Management Index. The lability of soil carbon as a measure of sustainability which is proposed in this research is based on the degree of oxidation of organic carbon by potassium permanganate. Thus technique allows monitoring of small short term changes in soil carbon which cannot be detected using total carbon measurements and the Carbon Management Index as a tool to monitor differences in soil carbon dynamics. The study sites were located in Mukah Dalat area Sarawak and in Simpang Renggam Johor. Peat samples from peat swamp forest were collected as a reference site for Carbon Management Index calculation. Top soil sample 0-15 cm was used in this study. Means we compared to the reference forest using Dunnetts test. In Mukah the labile carbon content for sago 24.9 g C/g soil oil palm 237.1 g C/g soil and pineapple 214.7 g C/g soil are higher compared to the forest 177.4 g C/g soil. There is a significant difference for sago and oil palm ecosystems compared to the forest. Meanwhile in Simpang Renggam the forest 190.0 g C/g soil shows the highest content of labile carbon compared to oil palm 89.7 g C/g soil and pineapple 134.8 g C/g soil ecosystems. There is a significant difference for oil palm and pineapple ecosystems compared to the forest. Mukah forest ecosystems shows the lowest CMI value while that in Simpang Renggam the highest CMI. It is believed that the differences in results among these two sites may be due to the use of different secondary forest asa reference site. Besides the history of both plantations should also be considered because the age gap between these two plantation sites which is about 30-40 years old may have caused these differences. The older plantation has been exposed to a long term oxidation subsidence etc. thereby having less labile C compared to the younger plantation. There is a possibility of using Carbon Management Index to monitor the soil carbon changes on peatland after conversation from forest to agriculture land.

Full text available from:

Abstract

Tropical peatland constitutes over 80 of the global area and can stores up to 20 of global peatland carbon. In Malaysia there are about 2.3-2.7 million ha of peatland area and about 1.7 million ha is found in Sarawak. The carbon sink of a peatland is labile and sensitive to disturbance in environmental conditions. This study was conducted to investigate the changes in labile carbon of different land use on peat thus to establish the Carbon Management Index. The lability of soil carbon as a measure of sustainability which is proposed in this research is based on the degree of oxidation of organic carbon by potassium permanganate. Thus technique allows monitoring of small short term changes in soil carbon which cannot be detected using total carbon measurements and the Carbon Management Index as a tool to monitor differences in soil carbon dynamics. The study sites were located in Mukah Dalat area Sarawak and in Simpang Renggam Johor. Peat samples from peat swamp forest were collected as a reference site for Carbon Management Index calculation. Top soil sample 0-15 cm was used in this study. Means we compared to the reference forest using Dunnetts test. In Mukah the labile carbon content for sago 24.9 g C/g soil oil palm 237.1 g C/g soil and pineapple 214.7 g C/g soil are higher compared to the forest 177.4 g C/g soil. There is a significant difference for sago and oil palm ecosystems compared to the forest. Meanwhile in Simpang Renggam the forest 190.0 g C/g soil shows the highest content of labile carbon compared to oil palm 89.7 g C/g soil and pineapple 134.8 g C/g soil ecosystems. There is a significant difference for oil palm and pineapple ecosystems compared to the forest. Mukah forest ecosystems shows the lowest CMI value while that in Simpang Renggam the highest CMI. It is believed that the differences in results among these two sites may be due to the use of different secondary forest asa reference site. Besides the history of both plantations should also be considered because the age gap between these two plantation sites which is about 30-40 years old may have caused these differences. The older plantation has been exposed to a long term oxidation subsidence etc. thereby having less labile C compared to the younger plantation. There is a possibility of using Carbon Management Index to monitor the soil carbon changes on peatland after conversation from forest to agriculture land.

[error in script]

Item Type:	Proceedings Paper
Additional Information:	Available at Perpustakaan Sultan Abdul Samad Universiti Putra Malaysia 43400 UPM Serdang Selangor Malaysia. mal S590.2 S683 2007 Call Number
AGROVOC Term:	PEATLANDS
AGROVOC Term:	PEAT SOILS
AGROVOC Term:	TROPICAL SOILS
AGROVOC Term:	CARBON
AGROVOC Term:	OXIDATION
AGROVOC Term:	SOIL ORGANIC MATTER
AGROVOC Term:	SOIL CHEMISTRY
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 05:13
URI:	http://webagris.upm.edu.my/id/eprint/10860

Actions (login required)

View Item