论文部分内容阅读
通过在３个时期的封育地块中设置标准地进行调查，对包头地区封山育林的效益有了量化的资料，实验证明了封育效益明显好于对照区，提出了在包头地区封山育林需用１０ａ左右时间方可成功的观点。
By standard setting in the three periods of enclosure plots, the benefits of closing hillsides to facilitate afforestation in Baotou area have been quantified. Experiments show that the sealing benefits are obviously better than those in the control area. About time to be successful point of view.