摘要
湿地松高产脂优树选择采用采脂工报优的方式在江西省吉安市湿地松主要种植区内进行普选。选优以产脂量性状为主,同时兼顾胸径、形质等性状,共选出优树45株,平均年产脂量17.67 kg,平均单位采割面积产脂量13.63g/cm^2,平均胸径30.37 cm。年产脂量最高的优树为JA-108,年产脂40.5 kg,年产脂量最低的优树为AF-90,年产脂10.63 kg;产脂力最高的优树为AF-94,单位采割面积产脂量为26.37 g/cm^2,产脂力最低的优树为JA-116,单位采割面积产脂量为6.35 g/cm^2。由此可以看出,产脂力高并不完全代表产脂量也高。根据年产脂量、单位采割面积产脂量和胸径的大小,以所有中选优树的年产脂量、单位采割面积产脂量、胸径的均值为划分标准,将选出的高产脂优树分为6种类型。笔者认为,类型Ⅰ、Ⅱ为用于营造湿地松采脂专用原料林的最佳优树类型;类型Ⅰ、Ⅲ为用于营造湿地松脂材两用原料林的最佳优树类型。
Plus trees for high-rosin yield of Pinus elliottii was generally selected by reporting of plus tree from rosin tapping worker in the main planting area of Ji’an City. 45 plus trees producing high rosin yield had been selected by using the rosin production trait as the main trait the trait of DBH and stem-form as the secondary trait. The mean of annual yield of rosin,per unit cutting area yield of rosin and diameter at breast height were 17.67 kg,13.63 g/cm^2 and 30.37 cm,respectively.Rosin production of JA-108 was the highest,40.5 kg per year,and rosin production of AF-90 was the lowest,10.63 kg per year;On the other hand,rosin productivity of AF-94 was the highest,26.37 g/cm^2,and rosin productivity of JA-116 was the highest,6.35 g/cm^2. So we can find out,rosin productivity of P. elliottii can not represent its rosin production. Therefore,based on the standardization of the mean value of annual yield of rosin,per unit cutting area yield of rosin and diameter at breast height of all of plus trees,these plus trees were divided into six types. The author considers that types of Ⅰand Ⅱwere the best types used to raw material forest of slash pine for rosin tapping,and types of Ⅰand Ⅲ were the best types used to raw material forest of P. elliottii for resin tapping and timber.
出处
《南方林业科学》
2017年第2期24-29,共6页
South China Forestry Science
基金
江西省科技支撑计划项目(20141BBF60025)
吉安市良种基地建设项目
吉安市林业局科技项目
关键词
湿地松
高产脂
优树
选择
Pinus elliottii
high-rosin yield
plus tree
selection
