广西桉树造林区水体监测与评价

桉树人工林生态问题已成为森林与环境、林业持续发展中社会各界共同关注的焦点之一。通过在广西主要桉树人工林造林区设置3个监测点，进行pH值、高锰酸钾指数（CODMn）、5日生化需氧量（BOD5）和悬浮物（SS）的多年定位监测。监测数据表明：桉树造林后林区水样CODMn、BOD5、SS、pH值的参数均发生了显著的变化；宁明、...

Water Body Monitoring and Plantations in Evaluation of Eucalypt Guangxi

Ecological question of eucalypt plantations has became a common concern in the forest and environment, forest sustainable development field. Effect of eucalypt plantations on water quality in forest region was studied to provide scientific evidence for evaluating the ecological effect of eucalypt plantations. Three monitoring sites were set in the main eucalypt plantations of Guangxi to survey the changes of the pH, CODMn, BOD5 and （SS） The monitoring data showed that： the characteristics of pH, CODMn, BOD5 and suspended solid value in the water sample of eucalypt plantations were changed significantly after afforestation; CODMn value in three monitoring sites （Ningming, Huanjiang, Wuzhou） were decreased 33.33%, 36.59% and 81.61% respectively; BOD5 value in Ning- ruing and Wuzhou sites were increased 5.67% and 0.29%, but decreased 0.37% in Huanjiang; SS value in three monitoring sites were increased 17.29 %, 0.95 % and 6.47 % respectively; pH value in three monitoring sites tended to he neutral The concentration of reducing contaminants in the plantations was increased in one-year afforestations, and decreased rapidly with the increase of afforestation time, while the concentration of biodegradation contaminants was increased, and the pH tended to be neutral. In order to keep water quality of plantations, the concentration of organic contaminants which were brought by eucalypt plantations needed to be monitored.