水泥粉尘沉降对杉木等树种生长的影响

The effects of cement flying dust deposit on the growth of China Fir and some other forest trees

在受到水泥粉尘污染的约３０年生马尾松（ＰｉｎｕｓｍａｓｏｎｉａｎａＬａｍｂ．）、黑松（Ｐ．ｔｈｕｎｂｅｒｇｉＰａｒｌ．）和杉木〔Ｃｕｎｎｉｎｇｈａｍｉａｌａｎｃｅｏｌａｔａ（Ｌａｍｂ．）Ｈｏｏｋ．〕林地，各建立５０ｍ２样地，测定滞尘量，凿取水泥厂投产（１９８３年）前后各６年的木材样品，进行树干解析和有关元素含量的测定。结果表明，水泥粉尘对林木的高、胸径和材积的生长有抑制影响，并使木材中硅、钙、钾、磷含量增加，镁、铁、铝含量减少。这种影响随树种而异。

The effects of cement flying dust on the growth of some forest trees, such as China Fir, Black Pine, Masson Pine and on the content of relative elements in timber were investigated and analysed by establishing 50 m 2 sample lands per species and selecting analytic woods in different polluted forest lands where trial trees grew, and by chiseling timber growing for 6 years before or after the year of 1983 when the cement factory put into production. Results showed that cement flying dust could exert injurious impact on the growth of height, breast diameter, timber volume of forest trees, increase at certain degree the contents of Si, Ca, K, P with decreasing of Mg, Fe, Al in timber. However this impact was changed with tree species.