CO2 and CH4 emissions on different water management and pesticide treatments in rice fields of tidal peat swamp
2015
Susanti, M.A. | Anwar, S. | Dadang | Las, I. | Sabiham, S.
Utilization of peatlands for agriculture will be associated with water management and pesticides. Rice cultivation in peatlands becomes a potential contribution to global warming through carbon dioxide (CO2) and methane (CH4) emission. The study was conducted in a tidal peat swamp at Central Kalimantan Province from October 2012 to March 2013. The study aims to evaluate the effect of water management and pesticides on CO2 and CH4 emissions. The study was designed in a split plot design with three water management treatments as the main plot and six pesticide treatments as subplots. The water management treatments were: control (A0), saturated water (A1), and intermittent irrigation (A2). The pesticide treatments were: control (P0), paraquat during tillage (P1), fenobucarb for every week application (P2), fenobucarb for every two weeks application (P3), difenoconazole for every week application (P4), difenoconazole for every two weeks application (P5). Fenobucarb which was applied every week (P2) was able to suppress CO2 flux to as much as 40%. Intermittent irrigation (A2) could mitigate CO2 flux measured from soil to as much as 36%. Suppression mechanism of GHG emissions appear to be associated with the binding mechanism between pesticide and phenolic acids.
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