城市污水对4种树木生理指标的影响

Effect of Municipal Sewage on Physiological Index of Four Tree Species

研究了在城市污水浇灌条件下,尾叶桉、马占相思、阴香、小叶榕4个树种的净光合速率、蒸腾作用、叶绿素含量的变化情况。结果表明:尾叶桉、马占相思、小叶榕3个树种的净光合速率、蒸腾作用、叶绿素含量均随着处理污水浓度的增加而增加;阴香的净光合速率、叶绿素含量经半污水处理升高,而全污水处理则降低,蒸腾速率随着处理污水浓度升高而降低。表明尾叶桉、马占相思、小叶榕抗污染能力较强,而阴香抗污染能力较弱。

Changes of net photosynthetic rate, transpiration rate and chlorophyll content of Eucalyptus urophylla,A cacia mangium, Ciaaamumum burmannii and Ficus microcarpa were studied under the condition of municipal sewage irrigation. The results showed that the above -mentioned indexes of Eucalyptus urophylla,A cacia mangium and Ficus microcarpa increased with the increase＂ of sewage concentration. Net photosynthetic rates and chlorophyll contents of Cinnamumum burmannii were positively related to half-sewage concentration, and negatively related to fullsewage concentration. The transpiration rate was decreasing along with the increase of sewage concentration. All of the results showed that the antipollution capability of Eucalyptus urophylla,A cacia mangium and Ficus microcarpa was better than that of Cinnamumum b urrnannii.