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顺义是北京市的主要水源地和农业生产基地,研究氮素在顺义区土壤中的分布累积及空间变异情况,对于了解顺义区的土壤潜在污染,指导农业生产,预防面源污染等具有重要作用.因此,本研究应用传统统计学方法和基于GIS的地统计学法研究了顺义区不同地点各土层土壤中硝态氮的空间分布特征.结果发现,地统计分析过程中,在考虑各向异性和趋势效应的情况下,各土层土壤硝态氮含量均具有空间相关性,理论变异模型主要为球状模型和指数模型.同时,选用普通Kriging插值法得到了各土层土壤硝态氮的空间分布图,并对其空间分布特征进行了分析.结果表明,研究区不同土层硝态氮空间分布状况各异,潮白河东部土壤硝态氮含量高于潮白河西部.
Shunyi is the main source of water and agricultural production base in Beijing. Studying the distribution and spatial variation of nitrogen in the soil of Shunyi District is of great significance for understanding the soil potential pollution, guiding agricultural production and preventing non-point source pollution in Shunyi District Therefore, this study studied the spatial distribution of nitrate nitrogen in soil of different soil layers in Shunyi district by using traditional statistical methods and geostatistics based on GIS, and found that in the process of geostatistics analysis, In the case of the opposite sex and the trend effect, the soil nitrate nitrogen content of all soil layers has spatial correlation, and the theoretical variation model is mainly spherical model and exponential model. At the same time, the ordinary Kriging interpolation method was used to obtain the soil nitrate nitrogen The spatial distribution of the soil and the spatial distribution of the soil were analyzed.The results showed that the distribution of nitrate nitrogen in different soil layers was different in the study area and the content of nitrate nitrogen in the eastern Chaobai River was higher than that in the west of Chaobai River.