油茶容器苗的生长节律

摘要

近年来油茶产业发展迅速,油茶容器苗开始得到应用.为了揭示油茶容器苗与裸根苗生长节律的差异性,为今后油茶容器苗的栽培及管理提供理论依据,对油茶1年生容器苗与1年生裸根苗移植后的生长节律进行了为期1年的对比观测.根据观测结果,采用Logistic方程,对移植苗木的生长节律进行了拟合；再根据拟合的结果,将1年生油茶容器苗的生长期划分为生长初期(4月1日～5月20日)、速生期(5月21日～8月31日)和生长后期(9月1日～10月16日).从对比观测的结果来看,容器苗的苗高生长比裸根苗大约提前15d进入速生期,且其速生期比裸根苗长10 d左右,其苗高年生长量是裸根苗的1.533倍；1年生油茶容器苗的年生物量主要积累在茎、叶部,其茎、叶部的生物量约占其总生物量的90％,而1年生油茶裸根苗的年生物量则主要积累在根部,其根部的生物量约占其总生物量的50％.%Camellia oleifera industry is rapidly developing in recent years, container seedlings were used in practice gradually. In order to understand the difference of container seedlings from bare-root seedlings, and offer a theoretical basis for cultivation and management of container seedlings in C. Oleifera, growth rhythms of one-year-old container seedlings and bare-root seedlings in C. Oleifera were observed and compared. The growth rhythm of seedlings was simulated by Logistic equation based on the observation results, the growth rhythm was divided into three stages, the early stage (from April 1 to May 20), fast-growing stage (from May 21 to August 31) and late-growing stage (from September 1 to October 16). The container seedlings went into fast-growing stage ahead of about 15 days than the bare-root seedlings, the stages was about 10 days longer than that of the bare-root seedlings, and the annual increment of height of container seedlings was 1.533 times of that of the bare-root seedlings. Annual biomass of the one-year-old container seedlings mainly accumulated in stem and leaf, about 90% of the total biomass, while that of the bare-root seedlings mainly accumulated in root, about 50% of the total biomass.