Abstract:

In order to improve the quality of seedlings and standardize the market and formulate scientifically rational standards for seedlings of oil-tea camellia, through method of small sample plot and random sampling and principal components analysis, the seedling height, ground diameter, lateral root length and leave number of oil-tea camellia, which included annual grafted seedlings, annual seedlings and biennial grafted seedlings, were investigated in 9 nurseries distributed in Hunan, Jiangxi and Guangxi. Meanwhile, the indices which could be used for seedling grading were considered. The results showed that seedling height, ground diameter and main root length were employed for the quality guideline of seedling grading. The quality grading standards of the three kinds of seedlings were obtained as following: annual grafted seedlings (seedling height≥15 cm, ground diameter≥0.25 cm as grade I; seedling height≥10 cm, ground diameter≥0.20 cm as grade II); annual seedlings (seedling height≥25 cm, ground diameter≥0.30 cm, lateral root length≥10 cm as grade I; seedling height≥15 cm, ground diameter≥0.25 cm, lateral root length≥7 cm as grade II); biennial grafted seedlings (seedling height≥40 cm, ground diameter≥0.40 cm, lateral root length≥15 cm as grade I; seedling height≥25 cm, ground diameter≥0.30 cm, lateral root length≥10 cm as grade II).