富宁金花茶生物学特性及苗期生长规律

Biological Characteristics and Seedling Growth Rules of Camellia mingii

为了解新种富宁金花茶(Camellia mingii)的生物学特性及苗期生长规律,对富宁金花茶进行定期观察,了解其生物学特性;以2年生富宁金花茶实生苗为试材,每月定期观测其苗高和地径,共观测12个月,采用Logistic方程对2个指标的生长过程进行拟合,分析富宁金花茶幼苗生长规律。结果表明,富宁金花茶有春、夏和秋3次萌芽和抽梢,抽梢与展叶同步;萌芽和抽梢时间均早于普通金花茶(C.nitidissima);与越南塔姆岛金花茶(C.tamdaoensis)物候期较接近。富宁金花茶幼苗呈快-慢-快生长发育规律,可划分为生长初期(1月1日—2月17日)、速生期(2月18日—10月10日)、缓增期(10月11日—11月1日)和停滞期(11月2日—测量结束);苗高在1、4和9月快速生长;地径在5—8月快速生长。

In order to understand biological characteristics and seedling growth rules of Camellia mingii,C.mingii were observed regularly to understand biological characteristics.Taking two-year-old seedlings of C.mingii as materials,seedling height and ground diameter were observed every month for 12 months,and growth processes of two indexes were fitted by Logistic equations to analyze growth rules of C.mingii seedlings.Results showed that C.mingii had three times bud dynamic and sprout expansion in spring,summer and autumn,and sprout expansion was synchronous with leaf expansion.Time of bud dynamic and sprout expansion of C.mingii were earlier than those of C.nitidissima.Phenological stage of C.mingii was closer to C.tamdaoensis.C.mingii seedlings showed fast-slow-fast growth and development rule,which could be divided into early growth stage(January 1stto February 17th),rapid growth stage(February 18thto October 10th),slow growth stage(October 11thto November 1st)and stagnation stage(November 2ndto end of measurement).Seedling height showed rapid growth in January,April and September,and ground diameter showed rapid growth from May to August.