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当前位置: 首页 > 文章 > 川中丘陵区涪江流域土壤矿质氮空间分布特征 农业环境科学学报 2010,29 (12) 2443-2449
Position: Home > Articles > Spatial Distribution Characteristics of Soil Mineral Nitrogen in Fujiang Watershed in the Hilly Region of the Middle Sichuan,China Journal of Agro-Environment Science 2010,29 (12) 2443-2449

川中丘陵区涪江流域土壤矿质氮空间分布特征

作  者：
李婷;张世熔;廖明辉;孙丹峰;黄元仿;李保国
单  位：
四川省地震局测绘工程院;中国农业大学资源环境学院;四川农业大学资源环境学院
关键词：
硝态氮;铵态氮;土壤类型;海拔高度;地形;坡度;种植制度
摘  要：
采用GPS、地统计及地理信息系统(GIS)相结合的技术和方法研究了川中丘陵区涪江流域土壤矿质氮含量的空间分布特征及其影响因素。结果表明,研究区内土壤硝态氮(NO3--N)和铵态氮(NH4+-N)含量分别为(79.21±24.34)mg·kg-1和(8.89±2.47)mg·kg-1,在不同土壤类型中,土壤硝态氮和铵态氮含量存在极显著差异(P<0.01)。土壤硝态氮含量以许家沟和中河沟区域为中心向北部和南部递增;土壤铵态氮含量以赵家湾、中河沟和任家沟为低值中心(<8.00mg·kg-1)向两旁逐渐增加。从低海拔到高海拔土壤硝态氮含量呈先增加后降低的趋势,土壤铵态氮含量持续降低;在丘体下部和平坝土壤中硝态氮和铵态氮含量均高于其他3种地形土壤中其含量;土壤硝态氮在不同坡度中均值比较为缓坡地>坡地>陡坡地>平地,从平地到陡坡地土壤铵态氮含量呈显著降低趋势;土壤硝态氮含量在小麦与其他作物轮作方式中明显低于油菜与其他作物轮作方式中其含量,土壤铵态氮则相反。
译  名：
Spatial Distribution Characteristics of Soil Mineral Nitrogen in Fujiang Watershed in the Hilly Region of the Middle Sichuan,China
作  者：
LI Ting1,ZHANG Shi-rong1,LIAO Ming-hui2,SUN Dan-feng3,HUANG Yuan-fang3,LI Bao-guo3(1.College of Resources and Environment of Sichuan Agricultural University,Ya'an 625014,China; 2.Survey Engineering Institute of Earthquake Administration of Sichuan Province,Ya'an 625000,China; 3.Recourse and Environment College of China Agricultural University,Beijing 100193,China)
关键词：
soil nitrate nitrogen; soil ammonium nitrogen; soil type; elevation; landform; slope; cropping system
摘  要：
The spatial distribution characteristics and influential factors of soil nitrate nitrogen(NO-3-N) and ammonium nitrogen(NH+4-N) in Fujiang River Basin were performed by technology of the Global Position System,geostatistics and Geographic Information System(GIS). The results indicated that the contents of soil NO-3-N and NH+4-N were(79.21±24.34) mg·kg-1 and(8.89±2.47) mg·kg-1,respectively. Meanwhile,the contents of soil NO-3-N and NH+4-N took on highly significant difference in different soil types(P<0.01). The lowest value regions(<68.00 mg·kg-1) of soil NO-3-N contents were mainly distributed in Xujiagou and Zhonghegou,and increased gradually towards south and north part. Taking the Zhaojiawan,Zhonghe Valley and Renjia Valley as the low center,the contents of soil NH+4-N increased to the both sides. From low elevation to high elevation,the contents of soil NO-3-N were increased firstly then declined and the contents of soil NH+4-N were steady decreased. The contents of soil NO-3-N and NH+4-N in the bottom of hilly and in the flatland were higher than in other three landforms. The contents of soil NO-3-N were highest in gentle slope land,then in slope land and in steep land,and were lowest in the flat land. However,the contents of soil NH+4-N were significantly increased from flat land to steep land. The soil NO-3-N contents in the cropping system of wheat-other crop were lower than in the cropping system of rape-other crop,and the soil NH+4-N contents were reverse.

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