考察地区株洲县位于湘中东部,湘江中下游流域,属中亚热带季风湿润气候区,该县自六十年代后期开始,营造了大量的杉木、马尾松、国外松等人工林。多年来,森林作为一种可向人类提供木材资源的作用已被充分认识,但是,对作为森林三大效益之 The survey area Zhuzhou County is located in the eastern part of Hunan Province and the middle and lower reaches of the Xiangjiang River. It belongs to the subtropical monsoon humid climate zone. Since the late 1960s, Zhuzhou County has created a large number of artificial forests such as Chinese fir, Pinus massoniana and Pinus armandii. Over the years, the role of forests as a source of timber for humankind has been well recognized. However, the role of forests as the three major benefits of forests