摘要
为了探讨吉林省耕地表层氮素分布特征及影响因素,以吉林省703万公顷耕地为研究区域,根据2010年吉林省耕地地力评价数据(6169个耕地表层土壤采样点数据),辅以吉林省行政区划图、吉林省土壤图、土地利用现状图,利用ArcGIS技术以及分析软件SPSS,计算了吉林省耕地表层土壤氮密度、储量,分析了其分布特征,并对影响吉林省耕地表层土壤氮密度的因素进行研究。吉林省耕地表层土壤氮密度平均值是0.473 kg m^(-2),氮储量为2902.13×103 kg。吉林省耕地表层土壤氮密度自东向西逐渐递减,东部、中部和西部平均值分别为0.611 kg m^(-2)、0.354 kg m^(-2)和0.307 kg m^(-2)。暗棕壤、黑钙土、草甸土、白浆土和黑土氮储量较高,占总储量的76.4%。土壤全氮含量和氮密度与海拔高度和年平均降雨量都呈极显著正相关,与年积温和pH都呈极显著负相关。
In order to explore the characteristics of nitrogen density distribution and influence factors in cultivated topsoil of Jilin Province,the survey areas of cultivated land in Jilin Province were 7.03 million hectares.According to the farmland productivity evaluation date of Jilin Province in 2010（6169 cultivated topsoil sampling points）,administrative zoning map,soil map and present land-use map,we calculated nitrogen density and storage in cultivated topsoil of Jilin Province,and analyzed the distribution characteristics by using ArcGIS technology and analysis software SPSS,and studied the factors affecting the nitrogen density of cultivated soil in Jilin Province.Average nitrogen density was 0.473 kg m^-2 and nitrogen storage was 2902.13×10^3 kg in cultivated topsoil.Cultivated topsoil nitrogen density showed a decreasing trend from east to west,and the averages were 0.611 kg m^-2,0.354 kg m^-2 and 0.307 kg m^-2,respectively,in the eastern,central and western region of Jilin Province.Nitrogen storage in cultivated topsoil of Dark-brown Earth,Chernozem,Meadow Soil,Albic Soil and Black Soil was higher,accounting for 76.4% of total nitrogen storage in cultivated topsoil of the region.Soil total nitrogen content and density had significantly positive correlation with altitude and mean annual precipitation,and had significantly negative correlation with mean annual precipitation and pH.
出处
《土壤通报》
CAS
北大核心
2017年第6期1385-1391,共7页
Chinese Journal of Soil Science
基金
国家科技专项(2016YFD0200304)
吉林农业大学科研启动基金(2015033)资助
关键词
耕地表层
土壤氮密度
分布特征
影响因素
Cultivated topsoil
Soil nitrogen density
Distribution characteristic
Influence factor
