Methane Emission from Rice Fields

Abstract

they do not cause specific symptoms on the aboveground parts of the plant, they can cause severe growth reduction, chlorosis, wilting of plants, and 20-70% yield reduction in infested fields. M. graminicola, the rice root-knot nematode, is widely distributed in rainfed upland and lowland ricefields in South and Southeast Asia, especially in lighttextured soils. It is considered to be an important pest in rainfed lowland areas in India and northeast Thailand.

Anaerobic Metabolism: Linkages to Trace Gases and Aerobic Processes

“…Methane emissions from wetlands per se are not considered in detail here because the topic falls outside the primary scope of this review and many excellent reviews already exist (Matthews and Fung, 1987;Aselmann and Crutzen, 1989;Bouwman, 1991;Neue, 1993;Bartlett and Harriss, 1993;Bubier and Moore, 1994;Bridgham et al, 1995;Denier van der Gon and Neue, 1995;Vourlitis and Oechel, 1997;Minami and Takata, 1997;Le Mer and Roger, 2001). In a compilation of 48 published studies of wetland CH 4 emissions (Le Mer and Roger, 2001), median rates were 0.43 kg CH 4 ha~1 d~l for peatlands, 0.72 kg CH 4 ha -1 d _1 for other nonagriculture freshwater wetlands, and 1.0 kg CH 4 ha~J d~: for rice paddies.…”

Terrestrial sedimentation and the carbon cycle: Coupling weathering and erosion to carbon burial

“…We must ask whether the increased methane coming from paddy lands implies increased carbon storage relative to the landscapes that the paddies replaced. Rice is an especially complex grain crop that can be grown on soils that are continuously dry (upland or dryland rice) to continuously wet (continuous paddy land rice) [Neue, 1993]. The great complexity of rice agriculture led Fung et al [1991] to treat rice as a "black box" in their global model of methane release.…”

Multi-year monitoring of paddy rice planting area in Northeast China using MODIS time series data

“…Mapping rice plant areas will also lead to more accurate assessments of irrigation water supply (Rosenzweig et al, 2004), grain production (Amano et al, 1993;Doraiswamy et al, 2005), and net primary production (Ma, 2008). In addition, the rice field has been recognized as one of the major anthropogenic emission sources of greenhouse gases (GHGs) and contributes to over 10% of the global atmospheric input of methane (Neue, 1993). Monitoring and mapping of paddy rice is thus very important for food security assessment and planning, environmental sustainability, and government decision making (Sakamoto et al, 2005;Zhang et al, 2009;Gumma et al, 2011).…”

“…Paddy rice fields are usually prepared by flooding a few days before rice seedlings are transplanted and have at least one wet growing season in shallow floodwater (Neue, 1993). Since the intermittent flooding in a paddy rice field could generate a distinct signature, identification of the flooding and transplanting periods is the foundation of rice planting area extraction (Malingreau, 1986;Bachelet, 1995;Xiao et al, 2006).…”