不同杉木良种林分生长比较

为筛选出适宜在福建杉木中心产区推广的杉木良种,选择5个杉木良种(福建尤溪第2代种子园实生苗、福建洋口第2代种子园实生苗、广西融水第1代种子园实生苗、洋020无性系组培苗、福建沙县本地种源实生苗),在福建农林大学莘口教学林场开展不同杉木良种、不同坡位造林对比试验,造林后12 a对不同杉木良种林分的生长情况进行调查.结果 ...

Comparative Study on Growth of Fine Chinese fir (Cunninghamia lanceolata) Forest Plantations

In order to screened out excellent Chinese fir varieties which are suitable for promotion in the central fir area of Fujian.A plantation with five Chinese fir varieties(the seedling of Youxi second generation orchard,the seedling of Yangkou second generation orchard,seedling of Rongshui provenance,tissue culture seedling of Yang-020 clones and seedling of Shaxian provenance)were planted in Xinkou Forestry Farm of Fujian Agriculture and Forestry University.12 years after afforestation,the average growth of different Chinese fir varieties were investigated.The study indicated that different varieties of afforestation has significant differences on DBH,tree height,individual volume and accumulated growth of 12-year-old Chinese fir forests.The average DBH,tree height and individual volume and accumulated growth of five Chinese fir varieties all reached the fast-growing and high-yielding standard of Chinese fir in Fujian Province.Among them,the seedling of Youxi second generation orchard has the highest growth rate,followed by the seedling of Yangkou second generation orchard,and seedling of Rongshui provenance is the worst.The average DBH,tree height and individual volume and accumulated growth of Chinese fir materials at various slope positions are shown as follows:downhill growth>medium slope growth>uphill growth.