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叙永县大安林场分别于1979年在大安山和1984年在人足板山营造杉木无性系子代测定林,现将两处林分生长情况初报于后。 1979年12月在大安山营林区营造了19个无性系和1个对照,共计20个处理的子代测定林,试验按完全随机区组排列,10次重复,对照为大安山优良林分中采集的种子。1985年2月进行调查,5年生的林分胸径生长统计分析的结果是,各无性系平均胸径4.71Cm,与对照平均胸径4.41Cm比大6.8％。在19个无性系中大于对照的有11个,占总数的72.7％。小于对照的有8个。
Da’an Forest in Xuyong County was established in Daan Mountain in 1979 and in 1984 for the determination of the Chinese fir clonal offspring afforestation plantation, the growth of the two stands are reported later. In December 1979, 19 clones and 1 control were set up in the Daanshan-Yinglin Forest Area. A total of 20 processing offspring were planted. The experiments were arranged in a completely random block and repeated 10 times. In the collection of seeds. The result of 5-year stand DBH growth analysis was that in 1985, the average DBH of all clones was 4.71Cm, which was 6.8% larger than the control average 4.41Cm DBH. Eleven of the 19 clones were larger than the control, accounting for 72.7% of the total. There are 8 less than the control.