白马河林场云南松母树林种源初期试验研究

Preliminary Study on Provenances of Pinus yunnanensis Mother Forest in Baimahe Forest Farm

１９９２年在白马河林场用白马河林场、古永林场、保山林场的云南松母树林的种子与永仁县和全省商品种子营造子代林，作对比试验。１９９６年２月对子代林树高，地径，材积进行方差分析和差异显著性检验，并进行遗传力，遗传增益的估算。结果表明：母树林的子代林与商品种子的子代林在树高、地径和材积的生长量均存在着极显著的差异，材积生长量遗传增益为８３３％，地径生长量遗传增益为６７４％，树高生长量遗传增益为１６４７％。经对３个种源幼树期的生长分析，初步得出在白马河林场以古永林场的种源最好。不同地域的云南松母树林第一代初期的表现性状均较稳定。

In 1992,Pinus yunnanensis filial generation forests were afforested in Baimahe forest farm by the seeds of Pinus yunnanensis mother forests in Baimahe forest farm,Guyong forest farm,Baoshan forest farm and the commercial seeds collected from Yongren county and other places of Yunnan,In Feb. 1996,variance analysis and significant test were done on the tree height,ground diameter and volume of the filial generation test forests of Pinus yunnanensis in Baimahe forest farm,moreover,heritability and genetic gain of these filial generation test forests were estimated,the results indicated that there were very significant differences on tree height,ground diameter and volume between the filial generation forest afforested by the seeds from Pinus yunnanensis mother forests and that afforested by commercial seeds,the genetic gain of volume increment, ground diameter increment and tree height increment were 6357%,674%and 1647% respectively,the initial expression characters of the first generation of Pinus yunnanensis mother forests in different districts were all relatively stable. Through analysis on the sapling growth of the 3 provenances afforementioned,preliminary found the provenances of Baimahe forest farm and Guyong forest farm are the best provenances.