摘要
[目的]估算网格化的中国耕地畜禽养殖废弃物氮负荷,以期准确分析中国畜禽养殖废弃物对环境的污染威胁。[方法]基于统计数据进行行政区域的畜禽养殖废弃物氮养分量的估算,并利用面积权重内插法和GIS空间分析技术进行中国耕地畜禽养殖废弃物氮负荷估算及网格化研究。[结果]网格化后的畜禽养殖废弃物耕地氮负荷基本保持了以各省区为单元数据的基本特征,不再是以行政边界为划分不同畜禽养殖废弃物氮养分负荷的依据,更接近于实际情况,并以河南省为例进行了验证。[结论]从整体空间分布角度看,2010年中国畜禽养殖废弃物氮负荷量空间分布其高值范围与低值范围的界线近似于中国400mm等降水量线。从各省域空间分布范围分析,氮负荷量高的主要集中在广东省、北京市、四川省及湖南省范围,而蒙古、新疆、西藏及青海这4个区域范围内的氮负荷量都较低。
[Objective]The paper aims to estimate nitrogen pollution load in farmland in order to analyze environment pollution caused by livestock and poultry in China.[Methods]This paper estimated the amount of nitrogen nutrient of livestock and poultry based on statistical data.Then,the estimation and gridding of nitrogen pollution load of farmland were done using the method of area weighted interpolation and spatial analysis of GIS.[Results]The gridding of nitrogen pollution load of farmland was consistent with the basic characteristics of provincial data and the administrative boundary was no longer used as a basis for the division of nitrogen pollution load.The paper then used He＇nan Province as s case study to verify the precision of gridding of nitrogen pollution load of farmland in China.[Conclusion]The dividing line of high value and low value of nitrogen pollution load of farmland coincided with the 400 mm isohyet.Among provinces in China,the higher nitrogen pollution load of farmland mainly occurred in Beijing City,Guangdong,Sichuan and Hu＇nan Province.The lower nitrogen pollution load of farmland mainly occurred in Inner Mongolia Autonomous Region,Xinjiang Uygur Autonomous Region,Tibet Autonomous Region and Qinghai Province.
出处
《水土保持通报》
CSCD
2015年第5期133-137,143,共6页
Bulletin of Soil and Water Conservation
基金
国家自然科学资助项目"基于混合地理权重回归的土壤性质空间预测模型研究"(41271232)
(41271354)
福建省教育厅科技项目(JB11151)
福建省中青年教师教育项目(JA13259)
福州市科技项目(2013-S-109)
闽江学院科技项目(MYK14012)
关键词
耕地
氮负荷
网格
空间分析
farmland
nitrogen load
grid
spatial analysis
