生态学报2017，Vol.37Issue(16)：5263-5272,10.DOI:10.5846/stxb201605190965
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
The spatial distribution and evolution trends of agricultural and animal husbandry carbon emissions in the northwest arid region of China
摘要
Abstract
It has long been recognized that there are certain physical limits on the global availability of economically valuable natural resources underlying their potential exhaustibility.However,for effective stewardship of earth's resources,these ecological constraints must be considered in the economy-environment interaction.Sustainability in agricultural production systems can partly be achieved through resource recovery,in which enhancing crop productivity through resources recovered from wastes is considered a potential measure to ensure food security.It has significant guideline sense to enact more specific policies on agricultural carbon emissions that doing the research on the characteristics and evolution rules of agricultural and animal husbandry carbon distribution.On the basis of the estimation of agricultural and animal husbandry carbon emissions in the arid regions of Northwest China from 2000 to 2013,this study analyzes the evolution of carbon emissions from agriculture and animal husbandry in this area using the non-parametric kernel density estimation method.Known as a non-parametric estimation method,kernel density estimation is usually used to estimate an unknown probability density function.In quantitative spatial analysis,kernel density estimation has been widely used for density surface mapping and "hotspot" detection by converting spatial sample points to a raster map of density surface.The results indicate that agricultural carbon emissions in the northwest region of China has grown remarkably;however,its spatial nonequilibrium characteristic is obvious.The emissions of agricultural and animal husbandry carbon in Xinjiang ranked first,followed by Gansu,Shaanxi,and Qinghai provinces,and Ningxia had the lowest emissions.Agricultural carbon emissions transformed from livestock breeding to the planting industry.The intensity of agricultural and animal husbandry carbon emissions in the northwest region is declining,but the regional disparity is obvious.The intensity of carbon emissions in the descending order is:Qinghai ＞ Ningxia ＞Gansu＞ Xinjiang ＞Shaanxi.The agricultural and animal husbandry carbon emissions in the arid regions of Northwest China shows an increasing tendency.But the relatively weak change trend reflects its relatively limited changes,which lies in different changing tend of four carbon emissions.The performances of the four carbon sources indicate that the regional differences in carbon agricultural land emissions are high.The regional gap of carbon emissions from agricultural and animal husbandry materials is greatly expanded,sometimes transferring from sharp to flat.Regional differences in carbon emissions from the intestinal tract of livestock as well as from livestock manure were significantly reduced.关键词
农牧业生态系统碳排放/空间分布/演变趋势/西北干旱地区Key words
agricultural and animal husbandry carbon emissions/spatial distribution/evolution trends/Northwest arid region of China引用本文复制引用
张振龙,孙慧,苏洋..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[J].生态学报,2017,37(16):5263-5272,10.基金项目
国家自然科学基金项目(71463056,41461114) （71463056,41461114）
新疆维吾尔自治区自然科学基金项目(2016D01B054) （2016D01B054）
