丘陵区杉木人工中龄林抚育抑制早衰的研究

• 作 者: 薛柞莘 彭松茂
• 机 构: 湖南省益阳市赫山区林业局!益阳,413002,湖南省益阳市赫山区林业局!益阳,413002
• 出 处: 湖南林业科技
• 发表日期: 1997年01期
• 关键词: 中龄林 丘陵区 用材树种 抑制早衰 早衰现象 营林措施 平均年生长量 径阶 中林 连年生长量

杉木（Cunninghamialanceolate）是我国南方重要用材树种。但湖南益阳地处低丘，由于每年7－9月的高温干旱和粗放经营管理，杉木人工林进入中龄阶段以后，便出现生长缓慢和平顶早衰现象。据此，我们在丘陵杉木人工中龄林内进行了间伐、垦复、施肥的对比试验。结果表明，杉木中林抚育是抑制林木早衰，增强后劲的重要营林措施，对开发丘岗林业生产，提高经济效益意义重大。

Cunninghamialanceolate is an important timber species in South China. However, due to the high temperature, drought and extensive management in July-September each year, the plantation of Yiyang in Hunan Province is located in the hilly area. After the Chinese fir plantation enters the middle-aged stage, the phenomenon of slow growth and flat-top premature aging appears. Based on this, we conducted a comparative experiment of thinning, reclamation and fertilization in artificial middle-aged Hilly fir forests. The results showed that Chinese fir plantation was an important forest management measure to restrain forest premature aging and enhance stamina, which was of great significance for the development of forestry production and economic benefits.