短枝木麻黄种源试验与生长变异规律研究

对11年生短枝木麻黄41个种源的生长性状进行方差分析和相关分析,结果表明:各性状生长在种源间的差异极显著;这种变异与种源所在的地理位置关系不十分密切;仅分布在南半球的种源,其树高生长与纬度呈显著负相关;种源高生长在苗期与11年生的生长关系不紧密,而树高、胸径在其他各生长期间的相关性达极显著水平。性状间的相关分析表明,树高、胸径、单株材积之间呈高度正相关。采用综合权重分析法,初步筛选出8个优良种源:广东湛江、18154(菲律宾)、18014(印度)、18157(马来西亚)、18153(巴布亚新几内亚)、18158(马来西亚)、18298(泰国)、18118(越南),这些种源均好于本地种源,可在闽南地区推广应用,为生产提供良种。

STUDY ON PROVENANCES TRIAL AND GROWTH VARIATION OF CASUARINA EQUISETIFOLIA

Compared with 41provenances from 20countries and areas,the variation in growth characteristics is assessed in provenance trial of C.equisetifolia at Dongshan,Fujian Province,China.The results showed that there were significant differences in height,DBH and volume among provenances.But there are no significant correlations between the variation and location of original regions except for height growth and latitude of in Southern Hemisphere.And the correlations among growth characters were highly significant.8 excellent provenances were selected among 41 provenances.They are Zhanjiang,Guangdong,18154(Philippines),18014(India),18157(Malaysia),18153(Papua New Guinea),18158(Malaysia ),18298(Thailand),18118(Vietnam) respectively.