The deciduous fruit trees (peach, grape, etc.) all have natural dormancy characteristics. If the accumulated amount of low temperature is insufficient, the natural dormancy is not enough. Even if appropriate conditions are given, the fruit tree cannot germinate and grow. Although sprouting and flowering sometimes, the fruit setting rate is low. Through artificial regulation, fruit trees can quickly pass through natural dormancy and warm up in advance. The measures are: Artificially concentrated pre-cooling at the beginning of winter, when the night temperature dropped to about 7°C, the shed was covered with insulation at the same time. Open the tuyere at night to allow cold air to enter; close the tuyere during the day and cover the insulation to keep it cool. After holding for about 30-40 days in this way, the fruit tree can be allowed to go through a dormancy period and warm up in advance. Chemical release from dormancy This method is only used on greenhouses. General chemical reagents lime nitrogen (ammonium hydrogen ammonium). Take 1 kg of lime nitrogen, add 5 kg of warm water at 40-50°C, and mix thoroughly for a long time to make it paste. Then apply it to the eyes of the grapes with a cotton swab, etc., so that it can sprout in advance.
The fundamental difference from traditional electric scooters, battery scooters, bicycles and other transportation tools is that electric wheelchairs have intelligent operating controllers. According to the different operation methods, there are rocker-type controllers, and controllers controlled by various switches such as the head or blowing system. The latter is mainly suitable for severely disabled people with upper and lower limbs. Nowadays, electric wheelchairs have become an indispensable means of transportation for the elderly and the disabled. It is suitable for a wide range of objects. As long as the user has a clear consciousness and normal cognitive abilities, the use of electric wheelchairs is a good choice, but it requires a certain amount of space for activities.
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