摘要
为筛选适合湘东低山丘陵区种植的杉木良种,以6种不同类型不同世代的杉木良种为试验材料(分别为福建洋口林场杉木3代种子园混系实生苗、福建优良杉木无性系洋020组培苗、湖南杉木2代种子园混系实生苗、湖南杉木1.5代种子园混系实生苗、湖南杉木1代种子园混系实生苗、湖南普通杉木人工林林分种子实生苗)营造试验林。结果表明:在6年生、8年生时,不同类型不同世代良种间平均树高、胸径和材积存在显著或极显著差异。在8年生时,湖南2代杉木良种材积最大,其均值为0.088 2 m~3,比对照大120.0%;其次是福建3代杉木良种和福建无性系,材积均值分别为0.085 8 m~3和0.085 4 m~3;福建无性系变异系数最小,为26.57%。杉木高世代良种具有明显的增产效果,选择本地选育的杉木良种造林能取得较好的增产效益。
In order to select the suitable improved variety of Chinese fir for planting in the low mountain and hilly areas of eastern Hunan Province, this study built test plantation was including six different types and different generation varieties of Chinese fir(the 3 rd generation of mixed generation seedling of seed orchard of Yangkou Forest Farm of Fujian Province,the improved clones of tissue culture seedling in Fujian Province(yang020),the 2 nd generation mixed generation seedling of seed orchard of Chinese fir of Hunan Province,the 1. 5 generation mixed generation seedling of seed orchard of Chinese fir of Hunan Province,the 1 st generation mixed generation seedling of seed orchard of Chinese fir of Hunan Province,the common seedling of plantation of Chinese fir of Hunan Province). The results showed that: In the six-year-old and eight-year-old seedling period,there were significant differences between the average tree height, DBH and volume of different types and different generations of Chinese fir varieties. In the eight-year-old seedling period,the volume of 2 nd generation seedling of seed orchard of Chinese fir of Hunan Province was the largest,the average value of volume was 0. 088 2 m~3,higher than the CK by 120. 0 percent. The volume 3 rd generation of seedling of seed orchard of Yangkou Forest Farm of Fujian Province and the improved clones of tissue culture seedling(yang020) in Fujian Province was 0. 085 8 m~3 and 0. 0854 m~3,respectively. The coefficient of variation of the improved clones of tissue culture seedling in Fujian Province was thelowest,which was 26. 57%. The high generation improved varieties has obvious effect of increasing yield, the selection of local Chinese fir improved variety can obtain better productivity effect.
引文
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