22种连蕊茶扦插繁殖比较

Study on cutage propagation of 22 species of Sect. Theopsis of Camellia

对引种的22种连蕊茶原种进行了扦插繁殖研究,并对其生根特性进行了分析讨论。实验结果显示:22个原种的扦插繁殖能力差异显著。63.3%的连蕊茶扦插后30～40天出现生根高峰。其中大萼连蕊茶和尖连蕊茶的生根率最高,达98.4%,荔波连蕊茶生根的数量最多,达到每根插穗平均15.3条,而披针萼连蕊茶以及长管连蕊茶未能生根。连蕊茶的生根率与其分布纬度、生根的时间、根的数量呈正相关关系。扦插成活率的高低与原种的生根率、纬度分布、海拔高度和插穗的生根质量有一定相关性:生根率高的种其成活率也相对较高,分布区纬度较高和分布跨度大的种成活率高。扦插成活率高的原种包括:尖连蕊茶、柃叶连蕊茶、荔波连蕊茶等,扦插成活率在50%以上。

The propagation ability of 22 Camellia species from section Theopsis were studied through cutting and their characters of rooting were analyzed.The results indicate that the 22 species had significant difference in rooting capabilities.The rooting peak of 63.3% species happened from 30th to 40th days after cutting.The rooting rate of C.macrosepala and C.cuspidata,were 98.4% which were the highest among 22 species.C.lipoensis had the highest roots quantity with the average number of 15.3 per cutting.But C.lancicalyx and C.elongata didn＇t root.The rooting rate of these 22 species was related positively with latitude,rooting time and the roots quantity.The survival rates had some relationship with latitude,altitude and rooting quality.As the survival rates were positive correlation with rooting rates,and species which lived in a high latitude area or widely distributed had higher survival rate.Species with higher survival rate were C.lipoensis,C.euryoides and C.lipoensis,whose survival rate were all above 50%.