北京城区油松灰分含量与大气质量指数相关分析

在对北京城区进行环境调查的基础上，采集不同功能区１９个样点的油松树枝样品，测定其中的灰分含量。结果表明：北京城区油松树枝灰分含量是从西北向东南呈逐渐增加趋势，在公园绿地附近一般有局降低的现象；在交通枢纽及工业区附近的油松树枝灰分含量最高，可达１．１４％－２．７６％，商业区及居民区灰分含量居中，其值在０．５１％－０．９５％之间；城区北边缘的公园区灰分含量最低，其值小于０．５２％，将上述测定结果与１９

CORRELATION ANALYSIS BETWEEN THE PSI AND ASH-CONTENT OF Pinus Tabulaeformis IN BEIJING CITY

Based on the environmental investigation analysis in Beijing city, 19 samples of the ash content of Pinus tabulaeformis branches in Beijing city are measured. The resultes show that the ash content of Pinus tabulaeformis branches is continuously increasing from the north west to the south east in Beijing city, and it tends to decrease locally near the greenbelts of parks. Nevertheless, it reaches the highest in the areas adjacent to traffic pivots and industry areas, the ash content of which is between 1.14 % and 2.76 % . In the downtown and the residential areas the ash content is from 0.51 % to 0.95 % . The ash content of the Pinus tabulaeformis branches is less than 0.52 % in the northwest margin areas. The correlativity between the ash contents of the Pinus tabulaeformis branches and the annual mean value of I ps from 8 sample spots is analyzed, and the correlation equation: y= 108.67 54.62x (r=0.809 3, n =8) is established; The physical meaning of the equation is explained and the feasibility of monitoring regional air quality by the ash content of Pinus tabulaeformis .