西南桦苗期种源选择初步研究

Preliminary Study on Provenance Selection for Betula alrioides' Seedlings

利用采自滇西南的13个西南桦种源的79个家系在瑞丽进行育苗试验,结果表明,种源间在苗高和根长上差异显著(Pr<0.01),同一种源家系间在苗高和根长上差异不显著(Pr>0.05).经多重比较和聚类分析(LSD法),根据苗期表现初步分为四类:第一类包括7个种源,分别为JC-1、JC-2、RL、CN、GM-1、GM-2和ZY-1;第二类为LC种源;第三类为LX种源;第四类包括4个种源,分别为JH、XM-1、XM-2和ZY-2.XM-1和ZY-2种源为优良种源,可在当地造林中使用,但需对造林后的生长表现作进一步验证.

The seedling experiment on 79 families of 13 Betula alrioides as seed sources from southwestern Yunnan showed that there were big differences in seedling height and root length between seed sources （ Pr 〈 0.01 ） ; while there was few difference between families in same source （ Pr 〉 0.05）. By multi-comparison and LSD, there were 4 types totally. In detail, 7 sources included in Type I, namely JC-1, JC-2, RL, CN, GM-1, GM-2 and ZY-1; LC source as Type II, LX as Type III, 4 sources in Type IV including JH, XM-1, XM-2 and ZY-2. Particularly XM-1 and ZY-2 as excellent seed sources can be applied in local afforestation, but their growth performance need to be further verified.