【摘要】 本文对朝阳市公路绿化树种进行了调查,并且建立了公路绿化5种树木的叶面积方程,利用LI-6400光合仪测定出朝阳市公路绿化树种的年吸收CO₂量26 202.9 t,年放O₂量1025 t,年蒸腾总量15 017 t,年蒸腾吸热量587 672 689 kJ。运用环境效益评价法估算出朝阳市公路绿化树种年吸收CO₂量总价值为27 574 559元,年放O₂量总价值为6 543 073元,年蒸腾吸热总价值为2 459 004元,总经济价值达36 576 639元。更多还原

【Abstract】 In this paper,leaf area regression equation for 5 kinds of trees of road in Chaoyang was established,and presently ecological benefits of trees measured and calculated by using LI-6400 Photosynthesis system were as fol- low:annual CO₂ intake was 26 202.9 t;annual O₂ discharge was 1 025 t;annual transpiration was 15 017 t;annual heat absorbed for transpiration was 587 672 689 kJ.Economic benefits estimated by environmental benefit evaluation methods were:27 574 559,6 543 073 and 2 459 004 yuan for annual CO₂ intake,O₂ discharge and annual heat ab- sorbed for transpiration respectively,and total economic values were 36 576 639 yuan.更多还原