Ornamental Characters And Ornamental Value Evalution Of The Manglietia From China

With the rapid arise and development of urbanization, the development andutilization of landscape plants has become the today's hot spot of the city gardenconstruction and environment improvement. Landscape plants are abundant in species.They have different ornamental values with different characters and habits, and playdifferent roles in garden. Therefore, as the most basic work and process of thedevelopment and utilization of ornamental plants, the ornamental value evaluation oflandscape plants has become a research hotspot. About40species of the genusManglietia Bl. occur in the world, of which27species, accounting for67.5%of the totalspecies, occur in China, which is the most abundant country in Manglietia species in theworld. The plants of Manglietia Bl. are a group of trees with high ornamental value forgarden and courtyard greening. They are of important values in garden and parkapplication. Based on the presented literatures, although there are many researches on theornamental value evaluation of landscape plants, the researches on ornamental valueevaluation of Manglietia have not been reported. Therefore, in this article, the ornamentalcharacters of Manglietia were investigated, the ornamental values of the Manglietia fromChina were evaluated and their sort order for priority exploitation was presented. Theseabove will give a theoretical basis and some scientific instruction for the developmentand utilization of the Manglietia from China and for the selection and breeding ofexcellent ornamental species of the Manglietia from China in the future. The specificresults are as follows:1. Through the investigation and analysis of the ornamental characters of the plantsin the field and the introduced and cultivated plants of Manglietia, the ornamental features of flowers, leaves, fruits and tree shapes of the27species of Manglietia fromChina were mastered, and the distribution law of the ornamental characteristics inManglietia were revealed.2. Based on the principles of system, science, match, operability and reliability andcombined with the features of Manglietia characters, the ornamental values of Manglietiaplants were analyzed with shape beauty, color beauty, smell beauty, aspection beauty,civilization beauty, rarity beauty and endemism beauty and a classification system ofornamental values of Manglietia plants were established. Then a reasonable ornamentalvalue evaluation index system of the Manglietia plants were constructed with theselected36indexes closely related to ornamental value.3. According to the ornamental value evaluation index system, the ornamentalvalues of the27species of Manglietia from China were evaluated with AHP. Andaccording to their ornamental values, they were graded and ordered for priorityexploitation. The results show that:(1) The ornamental value grade I species include2species, accounting for7.4%of the total evaluated species, such as Manglietia insignis(Wall.)Blume, Manglietia grandis Hu et W. C. Cheng and so on; the grade II speciesinclude7species, accounting for26%, such as Manglietia duclouxii Finet et. Gagnep.,Manglietia szechuanica Hu and so on; the grade III species include10species,accounting for37%, such as Manglietia fordiana Oliv, Manglietia hookeri Cubitt etW.W.Smith and so on; the grade IV species inculde8species, accounting for29.6%, suchas Manglietia obovatifolia C. Y. Wu et Y. W. Law, Manglietia ventii N. V. Tiêp and so on.(2) The priority exploitation species include9species, accounting for33.4%, such asManglietia insignis (Wall.) Blume, Manglietia grandis Hu et W. C. Cheng and so on; thesub-priority exploitation species include10species, accounting for37%, such asManglietia hongheensis Y.M. Shui et W.H.Chen, Manglietia pachyphylla H.T.Chang andso on; the less sub-priority exploitation species include8species, accounting for29.6%,such as Manglietia obovatifolia C. Y. Wu et Y. W. Law, Manglietia ventii N. V. Tiêp andso on4. Based on the ornamental value comprehensive evaluation results of Manglietiafrom China, five common species with exploitation priority, Manglietia szechuanica Hu,Manglietia insignis (Wall.) Blume, Manglietia duclouxii Finet et Gagnep., Manglietiaconifera Dandy and Manglietia aromatica Dandy, were selected and their floral partvariation were studied. The results show that the variations of their four floral stucturesincluding tepal, stamen, stigma and carpel, are the biggest in the5species. The fourfloral structures are main varied organs of the species. There are bigger variation among the individuals of the five species. Those will present a scientific basis for the occurrencepossibility and the breeding selection of excellent individuals.