Of The Chimonanthus Cut Flower Varieties Selection And Cultivation Techniques

Wintersweet(Chimonanthus praecox Link),the special plant of China, is one of the famous and precious flower plants which have long cultural history. Because it is useful and has huge economic value, producers and horticulturists invested bigger manpower and physical resource carrying on resource exploration and cultivating research, and have yielded many encouraging results in recent ten years. At the field of cut flower, the researches are mostly of post-harvest handling and storing technique, while there are no relevant reports on cut flower cultivation technique. The author thought at the time that the market demands of cut flowers in winter times were increasing, and the producers positively started the projects of cut flowers of wintersweet, there should have a series of specific cultivation technique for the guidance of making production going on more successfully. The present paper focuses on the variety selection and cultivation of cut flowers of wintersweet, and synthesizes research results , trying to find out the cultivation technique of cut flowers of wintersweet. (1)Variety selectionAccording to field-survey results and variety classification documents, using layer analysis which associates the qualitative analysis with the quantitative analysis, combining with market investigations results, we get more than 10 variety of excellent wintersweet for cut flower production from 35 wintersweet varieties of Nanjing and the city around it ,among which cv.Lasu got the highest score:3.484. (2)Research on the cultivation managementBy introduction and cultivation the selected varieties, we carried on cultivation management experiments, including choosing seeding ways, enhancing survival rate of cuttings and improving the quality of sprays through pruning the twigs and reshaping the boles.1. Seed bred experimentThrough comparison of several kinds of commonly used seeding way, it is found that the seeding rate of fresh seeds is the highest; the rate might above 80%. In two ways of seeding fresh seeds , the rate of seedlings emergence that stacked the fruit in the cool place and waited till its seed root revealing the less advanced line and then seeded them, is the highest, the rate can reach above 90%. And the seedlings emerge relatively early, which can lengthen the growth time to make seedlings grow stronger to survive the winter safely, and thus shorten the time of raising seedlings.2. Cutting bred experimentThe method of Using the highly concentrated hormone formula to soak cutting-terminals quickly, shielding part of the sunlight, growing in the clean matrix and intermittent atomization condition, can enhance the cuttings' survival rate of the wintersweet to more than 60%. Shielding one net (40% shade degree),using 500mg/LNAA solution to soaking cutting-terminals 20-30min, the cuttings' survival rate is 60%; while another hormone formula 40%alcohol+500mg/L NAA, soak cutting for 5-10 seconds, under the same conditions, the cuttings' survival rate is 67%. Adopting this kind of treatment, the best cutting seedling time is from the beginning of June; to the beginning of August.3. Reshaping and pruning experimentWhile pruning in winter, the wintersweet can form excellent cutting sprays next year if the growing branches and long sprays are lightly cut back. Embodied in: The annual starting points formed on the biennial spray increasing , more short sprays forming, while middle and long branches growing trend weakening, the density of flowers obviously increasing and finally the whole flowers counting and increasing. It also help to form biennial cut sprays, and improve the quality of them.4. Preliminary discussion of cultivation technique of cut flower of wintersweetBased on the research on wintersweet variety selection and cultivation management experiments, this part synthesizes predecessor's research results and the results got in the paper, formulates the cultivation technique of cut flower of wintersweet.