Method for promoting stevia rebaudiana stubble post-overwintering germination

Abstract

The invention provides a method for promoting stevia rebaudiana stubble post-overwintering germination. The method comprises the following steps that 1, when the temperature at night is decreased to 6-8 DEG C, a shed is arranged in time in a covering mode and covered with a woven straw, ventilation openings are opened at night, all the ventilation openings are closed in daytime, and low-temperature precooling treatment is performed; 2, after low-temperature precooling treatment is completed, an antifreezing agent is sprayed to stevia rebaudiana; 3, when the temperature is stabilized to be 3 DEG C or below in daytime, the shed and the woven straw are removed directly, and an antifreezing agent is sprayed again. According to the method for promoting stevia rebaudiana stubble post-overwintering germinationm, low-temperature precooling treatment is adopted, the cold resistance tolerance of stevia rebaudiana can be improved, the antifreezing agent is used for protecting stevia rebaudiana against freeze injuries, the phenomenon that germination is slowed down again due to the fact that stevia rebaudiana does not adapt to external temperature when the shed and the woven straw are directly removed when the temperature rises again to 3 DEG C is avoided, and germination of stevia rebaudiana is effectively promoted.

Description

technical field [0001] The invention relates to the technical field of stevia planting, in particular to a method for germination of stevia root stubble after overwintering. Background technique [0002] Stevia is a perennial herb of the genus Stevia in the Asteraceae family. The whole plant of Stevia rebaudiana contains sugar, and the sweetness of the leaves is the highest, containing about 14% of glycosides. The glycosides of the branches are equivalent to half of the leaves. The leaves of Stevia rebaudiana can be used as sugar after drying and crushing. Rebaudioside, the sweetness is equivalent to 250-300 times that of white sugar, and the heat is only 1 / 300 of white sugar. Not only that, stevioside has no toxic side effects, no carcinogens, safe to eat, and regular consumption can prevent high blood pressure and diabetes , obesity, heart disease, dental caries and other diseases, it is an ideal sweetener to replace sucrose. At present, it has been widely used in food, ...

AI Technical Summary

Problems solved by technology

[0003] Stevia is a temperature-loving plant with poor cold resistance. In the cold winter, if antifreeze measures are not taken to keep warm, it is easy to be frozen to death, which will lead to a decrease in the germination rate of the next year and affect the economic benefits of Stevia.

At present, the overwintering method of covering straw or greenhouses for heat preservation is adopted. Although covering straw is simple and convenient, it needs to be covered to 10-20cm to have the effect of heat preservation and cold prevention. The material consumption is large, and if it encounters rain and snow, it will cause serious damage to stevia. ;It is necessary to control the temperature of the greenhouse when using greenhouse insulation, and the greenhouse cannot be removed directly to avoid stevia's inadaptability to the external temperature