The Study Onappraisal Andapplication Of Ornamental Leaf Vegetables

Ornamental vegetables are plants of annual and biennial or perennial, which have certainly ornamental value and can be used as vice-food, suitable for indoor and outdoor layout, landscaping and enrich people's lives. Ornamental leaf vegetables are plants that use the leaves, leaves ball, foliage, abnormal leaves and petioles as the product. Ornamental leaf vegetables, as one of a large class of ornamental vegetables, are fast growing, strongly ornamental and rich in species. A series of studies of this paper contained two aspects of ornamental leaf vegetables,the appraisal and application. The main results are as follows:(1) Through the collection of common types of ornamental leaf vegetables, we discussed the features of types and ornamental, and we build a mathematical model to evaluation and analysis the 28 varieties of ornamental vegetables by Analytic Hierarchy Process (AHP).(2) Effects of different light intensities (10%, 30% and 100%) on the growth of 6 kinds of leaf vegetables were investigated in the present studied. The results showed that the leaf color was fading and the whole plant was looses under lower light intensity. Plant height, leaf number, the net photosynthetic rate, chlorophyll contents and fresh and dry weight were reduced with the decline of light intensity.(3) Effects of different low temperature(0℃,-5℃,-10℃,-15℃and -20℃) on 4 kinds of leaf vegetables were studied. Relative conductivity, semi lethal temperature, soluble protein content, MDA content, SOD activity and POD activity were measured. The semi lethal temperatures of the 4 vegetables were increasing gradually with decreasing of temperature,while the soluble protein content, MDA content and the protective enzyme system had no obvious rule.(4) Carried out the research of application of ornamental leaf vegetables; introduced the cultivation and management technology of leaf vegetables, analyzed the leaf vegetables'planting styles which are suitable for the performance of ornamental, such as: container planting, raised bed planting, open field cultivation and hydroponics. And introduced the application place for the cultivation of leaf vegetables, such as: courtyard, roof, indoor, parks and agricultural sightseeing garden.(5) Through the questionnaire survey, we can understand the basic level of understanding to ornamental leaf vegetables among the respondents. In the survey we found that most people did not show a growing desire. There are two reasons that one is the lack of leaf vegetables, another one is the limited of environment. However, it is generally agreed that ornamental vegetables has the edible and ornamental features, and in the process of planting can harvest fun.