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N2O emissions of India: an assessment of temporal, regional and sector trends

机译：印度的N 2 O排放：对时间，区域和部门趋势的评估

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This paper estimates the national level trend of India’s N2O emissions from 1985–2005 and detailed sub-regional (594 districts) level and sector emissions for the year 2005. N2O emissions are estimated using the latest methodologies (IPCC 2006), disaggregated activity data and indigenized emission factors. The estimates show that India’s N2O emissions have grown from 144 Gg in 1985 to 267 Gg in 2005 exhibiting a compounded annual growth rate of 3.1%, which has been gradually declining from 4.7% over 1985–1990 to 2.4% over 2000–2005. N-fertilizer application contributed most to N2O emissions, a 49% share in 2005 compared to 40% in 1985. Sub-regional (district-level) distribution of N2O emissions showed rising mean and spread over the years, with average emissions per districts increasing from 305 ton N2O per year in 1990 to 450 tons in 2005. The main reason being increased use of N-fertilizer. However crop selection plays an important role in N2O emissions and there are crops providing high economic returns but low N-fertilizer requirements. Agriculture sector could contribute considerably to GDP even with very low N2O emissions. Indian agriculture practices vary widely in input applications and crop yields across states. The gradual transition from traditional to modern agriculture over past two decades has enhanced the intensity of inputs like N-fertilizer. A simple correlation based on 1985–2005 trends shows that, ceteris paribus, a 10% increase in total crop production is accompanied with a 12.4% increase in N-fertilizer application and a 9.7% increase in total N2O emissions from India.
机译：本文估计了1985-2005年印度N 2 O排放的国家水平趋势，以及2005年详细的次区域（594个地区）水平和部门排放。N 2 O排放。估算表明，印度的N 2 O排放量已从1985年的144 Gg增加到2005年的267 Gg，复合年增长率为3.1％，从1985-1990年的4.7％逐渐下降在2000-2005年间增加到2.4％。氮肥的使用对N 2 O排放的贡献最大，2005年占49％，而1985年为40％。N 2 O排放量显示出多年来的平均值并呈上升趋势，每个地区的平均排放量从1990年的每年305吨N 2 O增加到2005年的450吨。主要原因是N-的使用增加肥料。然而，农作物的选择在N 2 O的排放中起着重要的作用，并且有些农作物的经济效益高，而氮肥的需求却低。即使N 2 O排放量非常低，农业部门也可以为GDP做出巨大​​贡献。印度的农业实践在各州的投入应用和农作物产量方面差异很大。在过去的二十年中，从传统农业向现代农业的逐步过渡增强了氮肥等投入的强度。基于1985-2005年趋势的简单相关性表明，小鸡等比农作物的总产量增加10％，氮肥施用量增加12.4％，总N 2 O来自印度的排放。

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