马尾松实生种子园花量分析

观测了福建省上杭县白沙林场马尾松实生种子园的21个家系花量,分析了家系内与家系间雌雄球花量、各家系雌雄球花量在不同冠层和方位的分布.结果表明:家系间与家系内球花量差异显著.马尾松球花花量在不同冠层的分布呈现显著差异.雌球花主要集中在上、中层,下层极少;雄球花则主要集中在中、下层.同时球花花量的分布在方位上差异不显著.可见,构建马尾松实生种子园过程中,在注重建园材料的生长、材性等重要经济性状的同时,还要注意雌雄球花量选择.此外,选择建园立地环境和加强人工管理也是提高马尾松开花量和保证雌雄球花比例,保证种子园稳产、高产的重要措施.

Analysis on the Female and Male flowers Strobilus production in Seedling Seed Orchard of Masson's Pine(Pinus massoniana)

The amount of female and male flowers strobilus from 21 families was investigated in Baisha seedling seed orchard of masson's pine(Pinus massoniana) from Shanghang County,Fujian Province.The results indicated that the amount of female and male flower strobilus,either within a family or between families,was significantly different,and the amount of female flower strobilus was also different from that of male.The amount of flower strobilus was significantly different in the different layers of canopy.The female flower strobilus was mainly distributed in the upper and middle layers,and the male flower strobilus was mainly distributed in the middle and lower layers.As a result of the illumination influence,the amount of flower strobilus in the east side of a tree was the least,and relatively were more in the south side and the west side.Accordingly,the female and male flower strobilus production and their proper proportion were also important and should be considered when a seedling seed orchard of masson's pine was established.