摘要:
在广东省大南山林场对20个种源的澳大利亚巨桉进行优良种源选择试验,2012年对其35年生树高和胸径进行测定分析。结果表明:种源间胸径、树高、材积生长差异极显著,胸径、树高、材积三者之间存在极显著的正相关,胸径、材积与经度、纬度、海拔存在负相关;生长量最大的种源是18696种源,其胸径、树高、材积平均值分别为77233cm、67500m、00204m3,分别是种源总体均值的10266%、10466%、10811%,变异系数达到3158%、2648%、7263%。通过综合权重法评选出4个巨桉优良种源,分别为18696(昆士兰)、20917(新南威尔士)、16892(昆士兰)和20668(昆士兰)号种源。
关键词:
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巨桉
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种源
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生长性状
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早期评价
Abstract:
In Danan Mountain forest farm of Guangdong Province,the experiment was conducted to select superior provenances of Eucalyptus grandis from 20 Australian provenances,and then analyzed the tree height and diameter of 35yearold seedlings in 2012. Results showed that the variation of DBH, tree height and volume of wood increment were significant among the provenances, and there was significant positive correlation between the DBH, tree height and volume. The largest growth of all provenances was No18696 (Queensland provenance), the average value of the DBH, tree height, and volume were 77233cm, 67500m, 00204m3, respectively, Those were 10266%, 10466%, 10811% of the population means, and the variable coefficient reached to 3158%, 2648%, 7263%, respectively. Through the method of synthetic weighted mark, 4 superior provenances were selected, which were No. 18696 (Queensland), 20917 (New South Wales), 16892 (Queensland), and 20668 (Queensland) .