內(nèi)蒙古農(nóng)業(yè)源溫室氣體排放清單估算研究
發(fā)布時間:2019-05-12 19:51
【摘要】:農(nóng)業(yè)源排放的溫室氣體是我國溫室氣體總量排放的重要來源,估算省級層面溫室氣體的農(nóng)業(yè)源排放量,并對其排放規(guī)律做出分析,對進(jìn)一步提出符合我國各地區(qū)實際情況的減排措施有非常重要的意義。本文主要使用《省級溫室氣體清單編制指南》中推薦的方法,對內(nèi)蒙古地區(qū)2005年、2010年、2012年和2014年農(nóng)業(yè)源排放的CH_4及N2O量進(jìn)行估算和分析。主要得到以下幾點結(jié)論:(1)2005年、2010年、2012年和2014年全區(qū)農(nóng)業(yè)溫室氣體排放總量分別為3065.14 萬 t CO2eq、3424.40 萬 t C02eq、3474.68 萬 t C02eq 和 3482.19 萬 t C02eq。(2)動物腸道發(fā)酵CH_4排放是內(nèi)蒙古地區(qū)農(nóng)業(yè)各排放源溫室氣體排放的最主要排放源,四年排放量分別為1916.27萬t C02eq、2127.66萬t C02eq、2134.46萬t C02eq和2147.26萬t C02eq;農(nóng)業(yè)用地N_2O的排放是內(nèi)蒙古地區(qū)農(nóng)業(yè)溫室氣體排放的另一重要來源,四年排放量分別為509.94萬t C02eq、630.31萬t C02eq、652.10萬tC02eq和694.45萬tC02eq;四年中,畜禽糞便管理過程導(dǎo)致 N_2O 的排放量分別為 468.27 萬 t C02eq、486.27 萬 t C02eq、505.62 萬 t C02eq和473.41萬t C02eq,是內(nèi)蒙古地區(qū)僅次于農(nóng)用地排放的另一重要排放源。(3)內(nèi)蒙古地區(qū)農(nóng)業(yè)用地產(chǎn)生的N2O主要來自兩個方面,直接排放和間接排放;其中,內(nèi)蒙古地區(qū)氮肥施入過程中,化肥氮占大部分,是引起直接排放的主要原因;大氣氮沉降引起的氮輸入量高于因淋溶徑流損失進(jìn)入水體的氮輸入量,所以大氣氮沉降導(dǎo)致的排放量是農(nóng)業(yè)用地N2O間接排放的主要原因。牛、羊等反芻動物是引起腸道發(fā)酵CH_4排放的主要原因;奶牛和綿羊的大量飼養(yǎng)而產(chǎn)生的大量糞便是畜禽糞便管理中CH_4和N2O產(chǎn)生的主要原因;內(nèi)蒙古地區(qū)生豬養(yǎng)殖量相對較大,并且糞便管理系統(tǒng)生豬對應(yīng)的排放因子較大,所以內(nèi)蒙古地區(qū)生豬糞便也是引起畜禽糞便CH_4排放的主要原因。(4)內(nèi)蒙古地區(qū)四年中農(nóng)業(yè)溫室氣體排放量的高值區(qū)分布在通遼、赤峰和呼倫貝爾市,整體呈現(xiàn)出東部排放多西部排放相對較少的規(guī)律。(5)內(nèi)蒙古地區(qū)四個年度農(nóng)業(yè)CH_4和N2O的排放強度平均值(以CO2當(dāng)量計算)分別為0.46t·ha-1·a-1、0.51t·ha-1·a-1、0.50t·ha-1·a-1 和0.49t·ha-1·a-1。排放強度最大的四個盟市是呼和浩特、通遼、赤峰和包頭市。(6)在Kaya模型的基礎(chǔ)上,本文對影響內(nèi)蒙古農(nóng)業(yè)源溫室氣體排放各因素進(jìn)行分析,得出農(nóng)業(yè)經(jīng)濟(jì)發(fā)展是影響內(nèi)蒙古地區(qū)農(nóng)業(yè)源碳排放最主要的原因,其次是人口數(shù)量的影響和產(chǎn)業(yè)結(jié)構(gòu)的影響,以上因素均是導(dǎo)致內(nèi)蒙古地區(qū)農(nóng)業(yè)溫室氣體排放量不斷增加的社會原因。(7)內(nèi)蒙古各盟市農(nóng)業(yè)CH_4和N2O的空間分布情況與各盟市的農(nóng)林牧漁業(yè)總產(chǎn)值和各盟市的人口數(shù)量呈顯著相關(guān)。內(nèi)蒙古東部地區(qū)的農(nóng)牧業(yè)快速發(fā)展是影響CH_4和N2O的空間分布的最主要影響因素,其次人口數(shù)量的增加也對各盟市CH_4和N2O排放分布產(chǎn)生影響。
[Abstract]:The greenhouse gas emitted from agricultural sources is an important source of total greenhouse gas emissions in China. The emission of greenhouse gases from agricultural sources at the provincial level is estimated, and the rule of its emission is analyzed. It is of great significance to further propose emission reduction measures in accordance with the actual situation in various regions of our country. In this paper, the CH_4 and N _ 2O emissions from agricultural sources in Inner Mongolia in 2005, 2010, 2012 and 2014 were estimated and analyzed using the methods recommended in the guidelines for the preparation of greenhouse gas inventories at the provincial level. The main conclusions are as follows: (1) the total agricultural greenhouse gas emissions in 2005, 2010, 2012 and 2014 were 30.6514 million t CO2eq,3424.40 10,000 t C02eq, respectively. 34.7468 million t C02eq and 34.8219 million t C02eq. (2) CH_4 emission from animal intestinal fermentation is the most important source of greenhouse gas emissions from agricultural sources in Inner Mongolia, with emissions of 19.1627 million t C02eq and 21.2766 million t C02eq in four years, respectively. 21.3446 million t C02eq and 21.4726 million t C02 eq; The emission of N _ 2O from agricultural land is another important source of agricultural greenhouse gas emissions in Inner Mongolia, with emissions of 5.0994 million tC02eq, 6.3031 million tC02eq, 6.521 million tC02eq and 6.9445 million tC02eq; in four years, respectively. In the past four years, the emissions of N 鈮,
本文編號:2475657
[Abstract]:The greenhouse gas emitted from agricultural sources is an important source of total greenhouse gas emissions in China. The emission of greenhouse gases from agricultural sources at the provincial level is estimated, and the rule of its emission is analyzed. It is of great significance to further propose emission reduction measures in accordance with the actual situation in various regions of our country. In this paper, the CH_4 and N _ 2O emissions from agricultural sources in Inner Mongolia in 2005, 2010, 2012 and 2014 were estimated and analyzed using the methods recommended in the guidelines for the preparation of greenhouse gas inventories at the provincial level. The main conclusions are as follows: (1) the total agricultural greenhouse gas emissions in 2005, 2010, 2012 and 2014 were 30.6514 million t CO2eq,3424.40 10,000 t C02eq, respectively. 34.7468 million t C02eq and 34.8219 million t C02eq. (2) CH_4 emission from animal intestinal fermentation is the most important source of greenhouse gas emissions from agricultural sources in Inner Mongolia, with emissions of 19.1627 million t C02eq and 21.2766 million t C02eq in four years, respectively. 21.3446 million t C02eq and 21.4726 million t C02 eq; The emission of N _ 2O from agricultural land is another important source of agricultural greenhouse gas emissions in Inner Mongolia, with emissions of 5.0994 million tC02eq, 6.3031 million tC02eq, 6.521 million tC02eq and 6.9445 million tC02eq; in four years, respectively. In the past four years, the emissions of N 鈮,
本文編號:2475657
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