RELEASE OF PHENOLIC ACIDS AND CARBON FROM RICE FIELDS ON CENTRAL KALIMANTAN PEATLANDS

MF, Barchia and Supiandi, Sabiham (2002) RELEASE OF PHENOLIC ACIDS AND CARBON FROM RICE FIELDS ON CENTRAL KALIMANTAN PEATLANDS. In: Proceedings of the International Symposium on Tropical Peatlands. BPPT, Jakarta, Jakarta, pp. 75-80. ISBN 979-951833-4

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Abstract

An experiment was conducted on three physiographical peatlands; coastal at Samuda, transitional at Sampit, and inland at Berengbengkel, Central Kalimantan. Under water-saturated conditions, peat decomposition releases some toxic substances: phenolic acids, and greenhouse gases: CH4 and C02. Some phenolic acids found in peat soils in Central Kalimantan were p-hydroxybenzoic, 0.687-0.967 mM; vanillic, 0.675-0.848 mM; syringic, 0.563-0.854 mM; p-coumaric, 1.385-1.975 mM; ferulic, 1.293-2.314 mM, and cinnamic acid, 1.329-2.281 mM. The concentration of most of these was toxic for rice growth, especially in the inland peat. Carbon released in form of CH4 from IR-64 and local variety rice fields from coastal peat was 10.765 and 7.598 mg/square meter/hr, and inland peat, 7.383 and 6.101 mg/square meter/hr, which were higher than that from the transitional peat, 5.840 and 4.697 mg/square meter/hr, respectively. The release of CO2 from IR-64 paddy fields was 49.237-51.485 mg/square meter/hr. Increasing intensity of soil tillage led to an increase in CH4 and C02 emission. Application of an ameliorant, based on 5 percent maximum sorption of Fe, composed of 70 percent mineral soil material and 30 percent electric furnace slag suppressed the effect of the derived phenolic acids by 22-47 percent. Moreover, emission of CH4 from IR-64 and local rice varieties from rice fields decreased by 57 and 67 percent, while emission of CO2 decreased by 55 and 49 percent, respectively

Item Type: Book Section
Subjects: S Agriculture > S Agriculture (General)
Divisions: Faculty of Agriculture > Department of Soil Science
Depositing User: 001 Bambang Gonggo Murcitro
Date Deposited: 01 Mar 2017 07:39
Last Modified: 06 Mar 2017 06:40
URI: http://repository.unib.ac.id/id/eprint/11645

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