光皮桦优良家系育苗试验初报

Preliminary Seedling Report of Excellent Betula luminifera Pedigree

以前期收集的广西壮族自治区天峨县林朵林场光皮桦(Betula luminifera H.Wink.)优树成熟种子为材料,进行光皮桦优良家系育苗试验。通过统计分析42个优良家系4个月苗龄的苗高、地径2个生长性状指标的差异,发现各家系苗期分化明显,苗高、地径差异显著,经苗期评价,初选30、39、17、35、19、32、20、2、7、27、42这11个为优良家系,其苗高分别超过了群体平均值的49%、46%、29%、28%、24%、22%、23%、21%、20%、20%、17%;地径分别超过了群体平均值的22%、4%、3%、18%、8%、19%、17%、11%、19%、16%、10%。这个结果可为广西地区发展光皮桦人工林提供科学依据。

Seedling experiment of Betula luminifera H.Wink.was conducted using mature B.luminifera seeds collected from Tiane county,Linduo tree farm as material.Statistical analysis of the seedling height and diameter of 42 excellent families after four months growth indicated that there were significant difference among the 42 pedigrees in seedling height and diameter.The seedling height of the selected pedigrees 30,39,17,35,19,32,20,2,7,27,42 was 49%,46%,29%,28%,24%,22%,23%,21%,20%,20%,17% higher than that of the group average respectively,and the seedling diameter was 22%,4%,3%,18%,8%,19%,17%,11%,19%,16%,10% higher than that of the group average respectively.The results provided a scientific basis for the development of B.luminifera in Guangxi.