日本落叶松原生种源引种试验研究

Study on Test of Introduction of Native Provenance for Larix Kaempferi

摘要:

笔者利用7 a生的生长数据对湖北省建始县长岭岗林场的日本落叶松种源试验林进行了分析.从日本引种的原生种源213个家系之间差异极显著,日本天然林产家系、日本各林业试验场种子园产家系和中国产混合种子间差异极显著.日本各林业试验场种子园产家系胸径、树高和材积生长分别是中国产混合种子的1.05,1.03,1.13倍,是日本天然林产家系的1.25,1.18,1.80倍.根据胸径、树高和材积进行优良家系的初步选择,选择前50个优良家系所获得的遗传增益分别为17.8%、18.6%和18.7%.

Abstract:

The analysis of the native provenance test of Larix kaempferi was studied by the anthor with 7th year growth data in Changlinggang Forest Farm of Jianshi County in Hubei Province. There were significant differences among 213 native families introduced; meanwhile, there were significant differences among the families from natural stands and seed orchards of Japan as well as the mixed seeds of China. The growth of DBH, height and volume of seed orchards throughout each Forest Test Farm of Japan were 1.05, 1.03, and 1.13 times of the mixed seeds produced in China, and 1.25, 1.18 and 1.80 times of the family of natural forest of Japan. The genetic gains of 17.8%, 18. 6% and 18. 7% would be got when 50 plus families were primarily selected based on DBH, height and volume respectively.