A kind of control method of wintersweet flowering period

Abstract

The invention provides a method for low temperature induction and regulation of the flowering period of the wintersweet. The method for low temperature induction and regulation of wintersweet flowering provided by the present invention comprises placing wintersweet in an environment below 12°C for low temperature treatment, and the wintersweet flower buds can normally expand and open when the required cooling capacity reaches 570CU. Based on the 'Utah model' and '7.2°C model', the present invention observes and counts the morphological data of each stage of wintersweet flowering period, and at the same time conducts a preliminary analysis of the cooling capacity required for flowering of two wintersweet varieties 'Suxin' and 'Qingkou'. The research results showed that the cooling capacity of 'Suxin' and 'Qingkou' wintersweet were 558CU and 570CU, respectively. On this basis, the 12-year-old potted 'Suxin' wintersweet seedlings were subjected to different low-temperature artificial induction treatments, and it was found that the flower buds could expand and open normally under 4, 8, and 12°C treatments; among them, the cooling capacity required to reach 12°C reached 570CU, in order to expand and open. The method of the invention can effectively regulate the flowering period of the wintersweet, so that the wintersweet blooms in advance or delays.

Description

technical field [0001] The invention relates to the field of regulating the flowering period of plants, in particular to a method for regulating and controlling the flowering period of Wintersweet. Background technique [0002] Wintersweet [Chimonanthus praecox (L.) Link] belongs to Chimonanthus praecox (L.) Link, which is a clustered, deciduous shrub of the family Chimonanthus. It has few pests and diseases and a long life span. It is a traditional ornamental precious flower with a long history in my country. Seven thousand years of application history. Its flowering period is from late November to March of the next year. It blooms in the middle of winter, fighting the cold and proud of the frost, with simple tree posture, elegant flower shape, and tranquil flower fragrance. The ornamental value, ecological value, economic value and social value of wintersweet are all very high. As the flower of December, it is the most prominent in the application of gardens. It can be pla...

AI Technical Summary

Problems solved by technology

[0009] The 'dynamic model' takes into account the negative effect of high temperature on relieving dormancy, and proposes a dynamic model for the offsetting effect of high temperature on low temperature, taking into account the different effects of the same temperature in the temperature cycle, that is, this model is not suitable for applications in colder or cooler winter climates. In warm areas, and the calculation of the dynamic model to estimate the cooling capacity is relatively complicated, and it is still relatively seldom used in China at present

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