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The opportunity of direct seeding to mitigate greenhouse gas emission from paddy rice field

机译:直接播种以减轻水稻田温室气体排放的机会

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Direct seeded rice (DSR) is one of the options to reduce CH4 emission because it uses less water during initial cropping but it sometimes has side effects such as increasing N_2O emissions. The trade-off N_2O and CH_4 production in rice soils makes a real challenge to reduce the gas production. Nonetheless, few studies have observed the effect of DSR to GHG emission. This study aims to investigate the option of agriculture strategy used to reduce GHG emission without any yield loss through DSR. The study was conducted during rainy season at experimental field of Indonesian Agricultural Environment Research Institute (IAERI), Central Java, Indonesia. We compared the emission of CH4 and N2O, yield and yield components that affected by DSR and TPR practices. Total CH_4 emission in TPR was from 352 kg ha~(-1) season~(-1) and, it ranged from 187 kg ha~(-1) season~(-1) in the DSR. The CH_4 emissions were 47% lower for DSR than for TPR during a rice growing season. No significant differences were observed among crop establishments on N_2O emissions. GWP were reduced by 46.4% under DSR compare to TPR. Crop-establishment did not influence grain yield, indicating the potential of DSR as alternative methods of establishing lowland rice with low GHG emissions.
机译:直接播种稻(DSR)是减少CH4排放的选项之一,因为它在初始裁剪期间使用的水较少,但它有时具有副作用,例如增加N_2O排放。水稻土壤中的折磨N_2O和CH_4生产是削减天然气生产的真正挑战。尽管如此,很少有研究观察到DSR对温室气体排放的影响。本研究旨在调查用于减少GHG排放的农业策略的选择,无需通过DSR损失。在印度尼西亚中爪哇省的印度尼西亚农业环境研究所(IAERI)的实验领域,在雨季进行了该研究。我们比较了受DSR和TPR实践影响的CH4和N2O,产量和产量组分的发射。 TPR的总CH_4排放来自352千克HA〜(-1)季节〜(-1),它在DSR中的187公斤HA〜(-1)季节〜(-1)。 DSR的CH_4排放量低于水稻生长季节的TPR 47%。在N_2O排放的作物机构中没有观察到显着差异。在DSR比较至TPR,GWP减少了46.4%。作物建立不影响粮食产量,表明DSR的潜力作为建立低地米饭的替代方法,具有低温室气体排放。

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