After the autumn season, followed by the advent of the winter, the wait for the temperature continues to drop. This season's management focus is to do a good job of cactus cold and warm work.
Cold winter temperatures in South China are not too low, and the minimum temperature is also above 0°C. Therefore, the facilities required for cactus overwintering in this area are relatively common. If it is cultivated in small quantities, the plants can be moved into the room with bright flowers by the window; a small temperature cabinet can also be used to keep warm; or a simple greenhouse can be covered with a film, which is economical; if there is enough space, a small scale can be built. Glass greenhouses are both practical and beautiful. In southern Fujian and Guangdong and Guangxi, the winter is relatively warm, as long as the transparent film is covered around the top of the plant growth point, you can safely winter. In the area of ​​the Yangtze River and Huaihe River, the temperature is relatively low, and the minimum temperature in January is about -2°C. There is a relative difficulty in overheating in winter for family homes lacking warm equipment. A small temperature cabinet can be made on the south window sill, and the artificial microclimate can maintain the temperature above 3°C. In the event of a cold current, cover with a thin quilt or place an electric light inside the temperature cabinet to increase the temperature inside the cabinet. In addition, enthusiasts in this area have the habit of using glass boxes to cultivate cacti. For example, enthusiasts in Wuhan are accustomed to placing cactus species that are more precious in a glass case. In winter, they cover the mouth of the cactus and can provide insulation. The enthusiasts use the home balcony to transform into a simple greenhouse, and then cultivate cactus plants in various glass boxes and glass cabinets. In the winter, they have the effect of double-layer insulation equipment. The sealed double-layer insulation is generally 7-8°C warmer than the outside temperature. Doing the above cold protection work well, the cactus class will be able to survive the winter.
In the Northeast and Central Plains regions, the winter temperatures are very low, reaching -10 to 20°C during the coldest period. However, households generally have heating equipment, and there is no problem in small amounts of wintering. If it is cultivated in large quantities, in addition to normal greenhouses, warm cupboards and other facilities, it must also be heated by fire or electric heating, and try to make the temperature relatively stable, and the minimum temperature should be kept above 5°C. In order to save heating costs as much as possible, the daylight should make full use of sunlight and heat.
Water-control cactus plants have obvious growth and dormancy processes in their native habitats. When cold winter arrives, they naturally go into a dormant state to reduce the loss of water in the body. Therefore, during the winter break, only the basin soil is kept slightly. Wet, no need to water, if the basin is too wet, it is easy to make plants suffer freezing injury. While a few species that do not sleep in winter and southern China, where the climate is warm winter, must not be cut off in winter, the amount of watering should be cut off, because prolonged periods of low temperature and high humidity can easily cause root rot.
Light cactus plants in the winter as much as possible to see the sun. The winter sunshine is relatively short. Cultivation of cacti indoors or in glass cases, warm cupboards, and greenhouses is not enough for sunlight. In the event of rain and snow, the light is even less. If the long-term light is insufficient, it will lead to poor plant growth, atrophy of stems and stems, dark burrs, and reduced ornamental value. Therefore, when wintering, the cold-tolerant species of melons (clouds) should be placed in a well-lit place at a high temperature in the greenhouse. This not only gives better light, but also has a higher local temperature. In addition, supplemental lighting can also be used to promote safe wintering of plants.
The cacti plant's extremely arid living environment has created the vast majority of its metabolic forms: in order to reduce the loss of water in the body, the stomata are closed during the day, and the decomposition of malic acid alone releases carbon dioxide for photosynthesis; at night When it's cool, it only opens pores, exhales oxygen, absorbs carbon dioxide, and synthesizes malic acid for the next day's photosynthesis needs. This special metabolic process of cactus will make your living room air purify, with the function of “air freshenerâ€, so put a few potted cactus plants in the room at night, which will benefit human health.
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