中国西北干旱地区农牧业生态系统碳排放的空间分布与演变趋势

发布时间：2018-03-11 04:30

本文选题：农牧业生态系统碳排放　切入点：空间分布　出处：《生态学报》2017年16期 　论文类型：期刊论文

【摘要】：研究西北干旱地区农牧业生态系统碳排放的空间分布特点与演变趋势对于我国制定更具针对性的农牧业减排政策具有重要的指导意义。对2000—2013年中国西北干旱地区农牧业生态系统碳排放量进行测算的基础上,运用非参数核密度方法对中国西北干旱地区农牧业生态系统碳排放的演变趋势进行分析,研究发现:中国西北地区农牧业生态系统碳排放总量增势强劲,但空间非均衡性特征明显,以新疆最高,甘肃次之,陕西和青海居中,宁夏最低,农牧业碳排放源从以畜牧业为主向以种植业为主转变;西北地区农牧业碳排放强度呈下降趋势,省域差距明显,碳排放强度由大到小排序依次是:青海宁夏甘肃新疆陕西。从考察期内西北干旱地区农牧业碳排放的地区差距来看,整体上呈扩大趋势,但相对微弱的变化态势则反映了其变化幅度相对有限,其原因在于四种碳排放的变化趋势不一致,具体表现为:农田土壤碳排放的地区差距明显扩大;农用物资碳排放的地区差距在大幅扩大的同时,还表现出峰值从陡峭变为平缓,变化区间大幅扩大的现象;牲畜肠道发酵碳排放地区差距大幅缩小;牲畜粪便碳排放的地区差距也明显缩小。
[Abstract]:The study on the spatial distribution characteristics and evolution trend of carbon emissions from agro-animal husbandry ecosystem in arid regions of Northwest China is of great significance for China to formulate more targeted policies for reducing carbon emissions from 2000 to 2013 in arid areas of Northwest China. Based on the calculation of carbon emissions from agricultural and animal husbandry ecosystems, The evolution trend of carbon emission from agro-animal husbandry ecosystem in arid region of northwest China was analyzed by using nonparametric nuclear density method. The results showed that the total carbon emission of agro-animal husbandry ecosystem increased strongly in Northwest China. But the spatial disequilibrium characteristic is obvious, Xinjiang is the highest, Gansu is the second, Shaanxi and Qinghai are the middle, Ningxia is the lowest, the carbon emission source of agriculture and animal husbandry has changed from animal husbandry to planting. The intensity of carbon emission from agriculture and animal husbandry in Northwest China shows a downward trend, and the difference between provinces and provinces is obvious. The order of carbon emission intensity from big to small is: Qinghai, Ningxia, Gansu, Xinjiang, Shaanxi. From the regional gap of agricultural and animal husbandry carbon emissions in arid areas of northwest China during the investigation period, On the whole, there is an expansion trend, but the relatively weak change trend reflects the relatively limited range of the change, the reason is that the four carbon emissions are not the same trend, the specific performance is: the regional gap of farmland soil carbon emissions is obviously expanded; At the same time, the regional gap of carbon emissions of agricultural materials has been greatly expanded, while the peak value has changed from steep to gentle, and the region gap of carbon emissions from livestock intestinal fermentation has been greatly reduced. Regional disparities in livestock fecal carbon emissions have also narrowed significantly.
【作者单位】：新疆大学新疆创新管理研究中心;新疆大学经济与管理学院;新疆农业大学经济与贸易学院;
【基金】：国家自然科学基金项目(71463056,41461114) 新疆维吾尔自治区自然科学基金项目(2016D01B054)
【分类号】：S181

【相似文献】