为研究低海拔区域浙江红花油茶无性系开花物候特性,对浙江金华东方红林场的22个浙江红花油茶无性系开花物候、花期长短、开花数量进行了调查观测。结果表明:低海拔地区浙江红花油茶无性系花期始于1月下旬,结束于4月中下旬,花期长达62.5 d,花期较集中,但开花期容易受到气候的影响。不同浙江红花油茶无性系开花物候差异显著,开花期最早的是无性系dy144,最晚的是无性系hy31。花期持续时间最长的是无性系hy54、hy179,花期持续时间均值为53.5 d;最短的是无性系hy58,花期持续时间均值为26.5d。22个无性系之间开花数量存在极显著差异(P < 0.01)。根据本试验的研究结果,其中无性系dy156、hy8、hy28、hy31、hy43、hy47、hy59、hy63、hy54、hy71、hy179可以考虑作为园林观赏推广品种。

The growth dynamics of root system and aboveground of the grafted seedlings of different Camellia oleifera cultivars are studied by skeleton method and root scanning. The results of 8-months’ observation on grafted seedlings of 5 C. oleifera cultivars showed that: the growth of aerial parts and root of the C. oleifera seedlings were not entirely in sync, during the time of low temperature from November to February, the root system still in sustained growth though the aerial parts of the 5 cultivars grew slowly. Remarkable differences were existed in root length, root surface area, root volume, root biomass and other indicators after 11-months’ growth. The mean value of total length of root-system was up to 243.3 cm and 143.4 cm for the minimum, the mean value of total root surface area was up to 50.2 cm2 and 31.7 cm2 for the minimum, the mean value of root volume of the C. oleifera seedlings was up to 0.843 cm3 and 0.578 cm3 for the minimum which lived 11 months after grafting. All the root length, root surface area, root volume of the 5 cultivars have remarkable differences.