Regional testing and superior provenance selection of Castanopsis hystrix provenances
The Provenance Testing in 3 different regional sites in Guangxi showed that the difference of average height, diameter and wood volume growth between different provenances was highly significant. The difference of growth was significant between different sites, which was no more than different provenances. There was no significant difference of interactive effects between site and provenance. Superior PUBEI and BOBAI provenance were selected which were both well performance in different sites. Compared with the provenance overall average, average height were increased respectively 9.10%and 12.24%, and average diameter were increased 13.49%, and wood volume were increased respectively 38.13%and 44.68%of PUBEI and BOBAI provenance. The genetic gain of average height, diameter and wood volume of superior PUBEI provenance were respectively 7.44%, 11.33%and 30.06%, and superior BOBAI provenance were respectively 10.02%, 11.33%and 35.23%. Compared with the provenance overall average, the two selected superior provenances showed certain advantage on tree form qualities such as stem straightness, stem fullness, clear length, branching angle, biggest branch and crown breadth, which were increased respectively 6.71%and 5.97%, 6.31%and 5.24%, 6.64%and 5.59%, 2.97%and 3.99%, 3.03%and 2.32%, 3.92%and 2.80%.
NETL
NSTL
万方数据
维普
