5.3.1. Extraction and Naming of Factors
The principal component analysis method was used to orthogonally rotate the original factors by using the maximum variance method, and, finally, the expressions of each factor affecting the theme park landscape construction were obtained (
Table 8).
Factor 1 included X09, X15, X14, and X08, and the loads are 0.805, 0.749, 0.653, and 0.687, respectively, among which “X09 plants have high safety” has the highest load coefficient. This group of evaluation projects mainly reflects the tourists’ desire for safety, health, and rest places with plants, so it is named the “plant landscape healing” factor.
Factor 2 includes X03, X06, and X07, and the loads are 0.883, 0.823, and 0.764, respectively, among which “X03 plants have local characteristics” has the highest load coefficient. This group of evaluation projects reflects visitors’ concern for the cultural and distinctive nature of the botanical landscape of the park. Therefore, it is named the “plant landscape culture” factor.
Factor 3 includes X05, X16, and X10, and the loads are 0.828, 0.786, and 0.764, respectively, among which “X05 plants have scenery in four seasons” has the highest load coefficient. This set of evaluation items covers the landscape extensibility and compatibility of plants, hence, it is named the “plant landscape continuity” factor.
Factor 4 includes X12, X11, and X13, and the loads are 0.807, 0.782, and 0.772, respectively, among which “X12 plant landscape scattered” has the highest load coefficient. This group of evaluation items reflects the tourists’ need for a sense of scale and hierarchy in the plant structure, so it is named the “plant landscape spatial sense” factor.
Factor 5 includes X02, X01, and X04, and the loads are 0.83, 0.777, and 0.518, respectively, among which “X02 plants have different forms” has the highest load coefficient. This group of evaluation items reflects visitors’ attention to the beauty of the shape and colour of the plants, so it is named the “plant landscape beauty” factor.
5.3.2. Factor Analysis of Visitors’ Perceptions of Theme Park Plant Landscape
Considering the theme culture of the theme park, the plant landscape in the theme park should not only have the basic function of greening but also form the corresponding theme characteristics and context characteristics in landscape construction to meet the psychological and health needs of tourists. Therefore, tourists’ perceptions of the plant landscape in the theme park will be different from those of other garden types. The five factors extracted from the data analysis reflect the five aspects of tourists’ evaluations of the theme park plant landscape. This paper will further analyse the factor load in several evaluation items of each common factor and obtain the main factors so as to put forward suggestions on the construction of garden plant landscapes to meet the needs of tourists.
The variance contribution of factor 1, “plant landscape healing”, was 28.24%. Of its items, the loadings of “plants have high safety” and “plants have aromatherapy function” were higher, which were 0.805 and 0.749, respectively. One-fifth of the visitors were relatives, and most of them were families with children and elderly members. Therefore, these tourists pay more attention to the safety and healing of the plant landscape. With the development of horticultural therapy and fragrant flower therapy, tourists prefer fragrant plants [
44], such as
Jasminum sambac (L.) Aiton) and
Osmanthus fragrans, which are refreshing, have a certain sedative effect, and can relieve headache and fatigue, as well as
Cinnamomum camphora (Linn) Presl, with a fresh fragrance that prevents insects, purifies toxic air, and prevents cancer. Aromatherapy plants in the construction of theme park plant landscapes can not only satisfy the visions of tourists but also satisfy the olfactory experiences of tourists. The other two items of factor 1 are “plants have a medicinal value for food” and “plants construct shaded environments”. More and more people pay attention to healthcare [
45]; some plants with medicinal value were widely used in the construction of the park’s landscape. For example, the fruit and seeds of
Gleditsia sinensis Lam can be used as medicine, the bark and fruit of
Ligustrum compactum ((Wall. ex G. Don) Hook. f.) can be used as medicine, the leaves can be used to cure oral diseases, and the roots can be used to soak wine.
Eriobotrya japonica Thunb relieves cough and is antibacterial and anti-inflammatory. The fruit has the function of moistening lungs, the leaves have the function of clearing lung and stomach heat, and the seeds have the function of treating lymphatic tuberculosis. In addition to the medicinal properties of plants, labelling the medicinal value of plants on the list can play a role in popularising science and publicity for tourists. In addition, Quanzhou is a subtropical area; the annual total solar radiation is 120 to 140 kcal/square centimetre, and the annual sunshine hours are 1800 to 2200 h. Therefore, in addition to the hidden places in buildings and pavilions, it is necessary to create a shaded environment in the plant landscape for tourists to rest. For example, huge trees such as
Ficus microcarpa L. f. are planted as tree pools for visitors to rest, and in summer, they can also provide a cool and comfortable place for visitors.
The variance contribution of factor 2, “landscape culture of plants” was 16.656%. Of its items, “plants with local characteristics” and “collocation of famous flowers and trees” had the highest values, and the load coefficients were 0.883 and 0.823, respectively. Quanzhou Maritime Silkroad Art Park has a unique spirit as a park in terms of its cultural connotations, so visitors pay more attention to the symbolic meanings of the plants and agrestic landscape. For example, in Quanzhou, the local plant Erythrina variegata Linn represents the fact that it was the most important port city on the Maritime Silk Road, and it was called the “City of Erythrina Variegata” in the Song and Yuan Dynasties. The planting of Erythrina variegata plays a role in conveying and continuing emotions, giving local tourists a sense of belonging and non-local tourists a sense of recognition, and arousing tourists’ love for the park. Plants corresponding to the theme of the site in the park create a thematic atmosphere and also have a visual effect by dividing the regional space. For example, Bismarckia nobilis Hildebr and H. Wendl, with exotic characteristics and suitability for local growth, is planted in four theme gardens, along with Agave americana L., Butia capitata (Mart.) (Becc., et al.). During the tour, visitors also hope to enjoy famous traditional Chinese flowers and trees, which usually have profound cultural connotations, such as Pinus, Bambusoideae, Armenia camume Sieb, etc. The arrangement of such famous flowers and trees can set the scene of traditional Chinese gardens and arouse tourists to think about the connotations of plants and provoke infinite reverie in the poetic landscape. The last item in factor 2 is “plants with cultural connotations”, which indicates the inner spiritual and cultural pursuit of tourists and the need for plants rich in cultural connotations, symbolic meanings, and local characteristics. Therefore, it includes Malus spectabilis, a symbol of auspices, happiness, family harmony, and prosperity; Punica granatum L, a symbol of an abundance of children and family reunion; and Cunninghamia lanceolata, a symbol of an abundance of children and wealth.
The variance contribution of factor 3, “plant landscape continuity”, was 9.366%. Of its items, the value of “plant configurations with scenery in four seasons” is the highest, with a load coefficient of 0.828, indicating that tourists pay more attention to the extension degree of the plant landscape. Therefore, seasonal plant landscapes should be built according to different seasons to achieve four seasons of scenery, according to changes in the seasons of the landscape, to give tourists a sense of seasonality and novelty, further increasing the fun of the garden. This could include Tulipa gesneriana L. in spring, Gardenia jasminoides in summer, Codiaeum variegatum (L.) A. Juss. in autumn, Camellia japonica L. in winter, and other seasonal plants, so that the landscape presents the effects of seasonal changes. Due to tourists’ attention to the temporal and spatial dimensions of the landscape, plants with year-round flowering periods can be planted in the plant landscape. Therefore, Cassia surattensis Burm., Nerium oleander L., and Acalypha wilkesiana Müll, which bloom all year round, can be planted in the plant landscape. Arg. and other plants extend the viewing cycle of the landscape and ensure the landscape quality of the park. At the same time, there are many structures, sculptures, roads, facilities, and buildings in the Maritime Silkroad Art Park. The coordination degree with the surrounding environment should be considered in the allocation of plants so as to form an ornamental space type visually different from a pure plant landscape. As shown in the picture below, the Shanghai Dream window (red house) combines bamboo with buildings to form a combination of roofs and plants, forming a varied and unique ornamental landscape.
The variance contribution rate of factor 4, “spatial sense of plant landscape”, was 7.284%. Of its items, “plants create a wide-view environment” has the highest value, with a load coefficient of 0.807. According to the survey, the tourists whose main purpose was to play did not have high requirements for privacy in the garden, but they had some visual requirements for the spaciousness of the plant structure. The open landscape space not only provides tourists with visual comfort but also enhances the interactions between tourists. As shown in the picture below, low shrubs and ground cover should be planted at the entrance of the theme park to create a square with a wide view and facilitate the gathering and communication of tourists. The last two items in factor 4 are “plants are well spaced” and “plants construct interesting places”. Visitors under the age of 36 account for 69.6 per cent of the total, with 22.5 per cent taking their families with them. These kinds of tourists pay more attention to the wildness of the plant landscape, as demonstrated in the Mountain Garden (greenhouse) due to the park shaping the bush volume to create a landscape space for tourist recreation and entertainment. Tu Tong Qu Square uses terrain and plants to create a suitable playground for children. At the same time, the well-arranged landscape enriches the park’s hierarchy, so it is necessary to pay attention to the collocation between plants in the landscape’s construction. As shown in the picture below, the plant groupings of Maritime Silkroad Art Park consist of ground cover, small shrubs, large shrubs, and trees, which constitute a hierarchical plant landscape with vivid and flexible visual effects.
The variance contribution rate of factor 5, “plant landscape beauty”, was 6.772%. Of its items, the values of “different plant forms” and “rich and colourful plants” are higher, with load coefficients of 0.83 and 0.777, respectively. Female tourists accounted for nearly half of the visitors, and they were more inclined to the form and beauty of the plant landscape during the survey. In addition, Quanzhou has a subtropical monsoon climate, and most of the plants are evergreen plants. A large number of green plants can easily create a single landscape colour, so tourists prefer colourful and strange plant landscapes. In the construction of a theme park landscape, plants with different colours should be configured to provide tourists with colourful visual effects, such as yellow Bougainvillea spectabilis Willd, Red Erythrina crista-galli Linn., purple Loropetalum chinense var. rubrum, etc. In the construction of a theme park landscape, plants with different colours should be configured to provide tourists with colourful visual effects, such as purple or pink Bougainvillea spectabilis (Willd.), pale purple Melastoma candidum D. Don, white Plumeria rubra ”Acutifolia”, and so on. The other item of factor 5 is “having a flower view”, with a load factor of 0.518. Maritime Silkroad Art Park should not only provide tourists with cultural and spiritual contemplation but also meet the sensory needs of tourists. According to the survey of visitors to the park, 30.1% came to the park to enjoy the scenery. Therefore, flower appreciation plants should be planted in the plant landscape configurations of theme parks, for example, the red, stuffed, bulbous cherry Calliandra haematocephala; the bright, dense, and beautiful Ceibaspeciosa St.Hih; and palmatum Thunb, with its unique leaf shape.