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1977年在曲江林场的杉木嫁接种子园中采集了三十四个家系的自由授粉种子,分别在广东北部的曲江林场和南部的八一林场两处进行子代造林测验,四年生高、径生长测定,两处的F检验差异达极显著水平,说明不同环境条件对这批子代生长有很大影响。家系间差异也达显著水平。在曲江林场,高生长达较显著水平以上的有五个家系,比当地生产用种大12%。在八一林场,高生长达较显著水平以上的有十个家系,比当地生产用种大18.3%,其中最优子代在两地则分别高13%及25%,来自乐昌县的五个优树子代在两处表现均优。
In 1977, 34 families of free-pollinated seeds were collected from the Chinese fir grafting seed orchard in Qujiang Forest Farm. Their offspring afforestation test was conducted in Qujiang Forest Farm in northern Guangdong and Bayi Forest Farm in the south respectively, Diameter growth test, F test at two differences reached a very significant level, indicating that different environmental conditions have a significant impact on the growth of these offspring. Differences between families also reached significant levels. In Qujiang Forest Farm, there are five pedigrees with high growth rate above the significant level, 12% more than the local production. In Bayi Forest Farm, ten families with high growth rate above the significant level were 18.3% larger than the local production. The best offspring were 13% and 25% higher in the two places, respectively, from the five A superior tree progeny performance in both excellent.