幼林郁闭后,正处在旺盛生长期,需要把那些过密的、生长低劣的幼树间伐掉,以调整林分结构,改善生长环境,提高森林质量和单位面积产量。近年来,乌盟察右前旗在杨树人工林中按照抚育间伐的原则,把间伐改为间移,取得了显著的经济效益。“间移”就是把 After the young canopy is closed, it is in a period of vigorous growth. It is necessary to thin out the over-dense and poorly-grown saplings to adjust the stand structure, improve the growth environment, and improve the forest quality and yield per unit area. In recent years, Wuqianzuoqianqianqi poplar plantation in accordance with the principle of tending thinning, the thinning to shift, and achieved significant economic benefits. “Shift” is to put