Evaluation of the ornamental characteristics of Camellia hainanica single plant based on tree morphological characteristics

Camellia hainanica not only has excellent oil extraction value, but also has high ornamental characteristics with its beautiful and unique tree shape, large white flowers, and rich green leaf color. In this study, Camellia hainanica's branch spot, branch type, leaf density, leaf color, the degree of lack of crown, the average length of the first branch and other factors to evaluate the evaluation of Camellia hainanica's single tree ornamental characteristics of the tree morphology evaluation model, in order to expand the potential of Camellia hainanica in the application of ornamental gardens and greening. The results are as follows: (1) construct a comprehensive evaluation model of Camellia hainanica tree morphology index: S=0.346S₁ + 0.105S₂ + 0.099S₃ + 0.089S₄ + 0.086S₅ + 0.081S₆ + 0.073S₇, which results in the range of the comprehensive scores of Camellia hainanica single-tree morphology of −1.24～1.99; at the same time, screened out the volume of the tree crown and the color of the leaves as the (2) Based on the tree morphology score, Camellia hainanica single-tree ornamental characteristics were divided into grades, of which 45 plants were superior, 96 plants were good, 59 plants were average, and the model predictions were accurate and reliable through cross-validation; (3) Comparison of Camellia hainanica management modes in the resort and the nursery on the enhancement of ornamental characteristics, and the results showed that on the whole, Camellia hainanica plants in the resort and nursery had their own ornamental characteristics, and the results showed that Camellia hainanica plants in the resort and nursery had their own ornamental characteristics. The results showed that in general, Camellia hainanica plants in the resort and the nursery had their own advantages in terms of ornamental characteristics. The results of the study have certain reference value for the evaluation method of the ornamental characteristics of single trees with morphological characteristics, and provide important theoretical support for the construction of the evaluation system of the ornamental characteristics of urban greening, as well as providing a theoretical basis for the selection and maintenance of Camellia hainanica in the construction of ecological landscaping.