Abstract:

Abstract: Ficus concinna var. subsessilis is one of the important afforestation species in ecological environment construction and the shelter forest of silting coastal area in tropical and subtropical areas, because of its characteristic of unique landscape and the tolerance to low temperature and saline-alkali. The quality of container seedling affects the survival rate and early growth of reforestation directly. In this study, F. concinna var. subsessilis container seedlings of 180 days for research materials, 31 morphological and physiological indexes were mensurated. By means of principal component analysis and comprehensive evaluation, the key indexes and auxiliary indexes were selected, which can reflect on the quality of F. concinna var. subsessilis container seedling. The study shown that the quality of F. concinna var. subsessilis container seedling mainly decided on the total biomass, the underground biomass, the ground diameter and the root tissue. The quality of F. concinna var. subsessilis container seedling can be evaluated using key indexes and 2 auxiliary indexes by means of comprehensive evaluation. The 8 key indexes 5 morphological indexes and 3 physiological indexes, the former include ground diameter, total dry (fresh) weight, quality index, root dry (fresh) weight, stem dry (fresh) weight, and the latter include photosynthesis indexes (P_n, C_i, T_r, water use efficiency), chlorophyll content (chlorophyll a, chlorophyll b and chlorophyll a+b) and root activity. The 2 auxiliary indexes are height of seedling and the ratio of height to ground diameter.