Comparative Analysis on Growth Characteristics of 27 Introduced Pinus taeda Families in Yuhang
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摘要: 将1997年引进5个种源27个火炬松（Pinus taeda）家系，在杭州市余杭区长乐林场育苗并种植。2015年在其19年生时对生长性状和形体性状进行测定并进行比较分析。结果表明，19年生火炬松生长性状的差异主要体现在不同种源之间，种源内家系间差异不显著；各生长性状、形体性状间均无负相关，家系之间各形体性状的值差异不显著；各生长性状以本地驯化选育的火炬松混合种（PTA）及引种种源TX（源自德克萨斯）表现最好，其中以TX种源中的TX2和TX3A二个家系生长表现最佳，单株材积分别超过PTA的4.7%和11.6%，可以作为优良遗传资源引种本地，其它种源表现一般，各生长性状显著低于PTA。Abstract: 27 Pinus taeda families of 5 provenances were introduced for seedling cultivation and planting in Yuhang, Zhejiang province in 1997. Determination and analysis was carried out on growth traits in 2015. The result demonstrated that it had difference of growth traits among different provenances, but no difference among families of the same provenance. There was no negative correlations among growth and shape traits，and no differences among shape traits of different families. Duncan's multiple range test on provenances indicated that TX(Texas) and the control (locally improved P. taeda seed/PTA) showed the best in growth traits. Families of TX2 and TX3A from TX provenance had the best performances in volume of individual plant, 4.7% and 11.6% higher than that of the control. The introduction indicated that TX2 and TX3A were good genetic resources for being introduced in Yuhang.
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Keywords:
- Pinus taeda /
- provenance /
- family /
- growth traits /
- shape traits
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