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对4年生河北杨产地试验林进行了生长性状的研究。结果表明:不同产地间生长差异明显,树高、胸径、材积的广义遗传力分别为89.78％、61.62％、76.74％,遗传变异系数分别为15.34％、30.38％和40.7％,从中选择优良产地是可能的。同时还进行了1年生与4年生树高、胸径和材积的相关分析,相关系数均大于0.89,用1年生苗高和地径可预测4年生的树高和胸径,早期从严选择是可能的。
The growth characteristics of 4-year-old Hebei experimental area was studied. The results showed that the differences of growth among different producing areas were obvious. The general heritability of tree height, DBH and volume were 89.78%, 61.62% and 76.74% respectively, and the genetic variation coefficients were 15.34%, 30.38% and 40.7% possible. Correlations between tree height, DBH and volume of 1-year-old and 4-year-olds were also analyzed. The correlation coefficients were all greater than 0.89. It was possible to predict 4-year tree height and DBH with 1-year height and diameter. .