广西凭祥红锥人工林天然更新影响因素初探  

Natural Regeneration and Its Influencing Factors of Castanopsis hystrix Plantation at Pingxiang,Guangxi

作　　者：邓硕坤[1,2] 廖树寿[2] 黄柏华[2] 蔡道雄[2] 温远光[1] 

机构地区：[1]广西大学林学院,南宁530005 [2]中国林业科学研究院热带林业实验中心,广西凭祥532600

出　　处：《广西林业科学》2013年第1期48-51,60,共5页Guangxi Forestry Science

基　　金："十二五"国家科技支撑计划项目(2012BAD22B0105)

摘　　要：设置典型样地,对广西凭祥28～32年生红锥(Castanopsis hystrix)人工林林下红锥天然更新及其影响因素进行调查和分析。结果表明,林下幼苗、幼树、小树的平均密度分别为20 097.1、920.0、2 308.6株/hm2,小树的平均胸径和树高分别为3.10 cm和4.49m,幼树平均胸径和树高分别为1.52 cm和2.77 m,其天然更新良好,说明开展近自然经营是可行的。林下红锥的更新状况与上层林木的生长表现密切相关,上层红锥乔木表现越好,其幼苗越多,但其小树、幼树越少,而且生长表现越差,可能与光环境以及养分竞争差异有关;坡位是影响红锥更新的一个主要环境因子。Natural regeneration and its influeneing factors were studied through setting up sample plots in 28 to 32-year-old plantations of Castanopsis hystrix at Pingxiang, Guangxi. It was found that the average densities of seedlings, saplings and young trees were 20 097.1, 920 and 2 308.6 plants respectively per hectare, and the young trees and saplings grew well with mean DBH and tree height of 3.10 cm and 4. 49 m, 1.52 cm and 2. 77 m, respectively. It indicated that the plantations of this species were suitable for close-to-nature management. Under-story regeneration of C. hystrix was closely related to growth perform- ance of upper-layer trees. The better the trees on upper layer performed, the more seedlings it grew, however, the less young trees and saplings it grew with poorer growth performance, perhaps due to differ- ences in light environment and nutrient competition. Slope position was one of main environmental factors influencing natural regeneration of this species.

关 键 词：红锥 人工林 天然更新 坡位 相关分析 

分 类 号：S754.1[农业科学—森林经理学]