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首页> 外文期刊>Japan agricultural research quarterly >Improvement Potential of Life Cycle Greenhouse Gas Emissions from Paddy Fields: Assessing Influence of Sparse Transplanting and Non-puddling
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Improvement Potential of Life Cycle Greenhouse Gas Emissions from Paddy Fields: Assessing Influence of Sparse Transplanting and Non-puddling

机译：稻田生命周期温室气体排放的改善潜力：评估稀疏移栽和非水化的影响

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This study conducted a life cycle assessment of new techniques and approaches in rice paddy cultivation. We evaluated reclaimed land in Hachirogata, located in Japan’s Akita Prefecture. Non-puddling cultivation is a technique of planting rice without the puddling. A rotary plow is used to plant the rice in finely crushed soil. Non-puddling allows a delay in irrigation. Thus, the soil is less likely to become deoxidized and a smaller amount of methane gas is released from the disturbed soil. Sparse planting is a technique whereby the planting stalk density is reduced by 30% (21 stalks/m2 to 15 stalks/m2), thereby reducing the material costs of producing seedlings. We found that use of the non-puddling technique reduced overall GHG emissions to 69% of those produced by rice cultivation using puddling. With sparse planting, GHG emissions were only reduced by a small amount to 93% of that of full planting. The current work shows that the appropriate mixture of sparse planting and non-puddling cultivation is necessary to obtain the greatest reduction in GHG emissions.
机译：这项研究对稻田栽培的新技术和方法进行了生命周期评估。我们评估了位于日本秋田县八王子市的开垦土地。非水cultivation栽培是一种没有水的水稻种植技术。旋转犁用于在细碎的土壤中种植水稻。不浇水会延迟灌溉。因此，土壤不太可能脱氧，并且从受干扰的土壤中释放出少量的甲烷气体。稀疏种植是一种将种植秸秆密度降低30％（21秸秆/平方米至15秸秆/平方米）的技术，从而降低了生产苗木的材料成本。我们发现，使用非水化技术可将总的GHG排放量减少至使用水化法种植水稻所产生的温室气体排放量的69％。种植稀疏后，GHG排放仅减少了少量，仅为完整种植的93％。当前的工作表明，稀疏种植和非水产养殖的适当混合是最大程度减少温室气体排放所必需的。

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