Temperature is a very important environmental condition for flower cultivation. It directly controls the growth and development of flowers and flowering. Each flower has a maximum survival temperature above which it may cause flower burns or death. At present, it is during the hot summer season that the dangers of flowers and the prevention of such damages are now described as follows: 1. High temperature hazards. Excessive temperatures are detrimental to flower growth. When the outside temperature approaches the upper limit of the flower's survival temperature, it can lead to poor plant growth, stunted growth, and may even die in a short time. In general, an ultrahigh temperature above 45°C causes the proteins in flower cells to coagulate due to heat, leading to plant death. The high temperature will cause the leaves of the foliage plants to bleed green, shortening the flowering period of the flowers or the petals. Diseases and pests are frequent at high temperatures, and their damage to flowers is also aggravated. 2. High temperature prevention. According to many years of practice, the “Four Words†to prevent high temperature in flowers and trees are briefly described as follows: First, “coverâ€, that is, shade and anti-glare. High temperature and strong light almost always occur at the same time, so that shielding the strong light can effectively reduce the temperature. For flowers that are afraid of high temperature and light, such as bells, cyclamen, orchids, etc., they can be shaded or kept under shade in the high temperature season in summer, providing them with the necessary cool environment. If you do not have a arbor or shade shelter, you can use the method of moving indoors to cool the room and move it to outdoor ventilation at night. The second is "sprinkling", that is, watering humidification and cooling. In the high summer season, sprinkle water and spray water around the potted plants, which can increase the humidity and reduce the temperature. It can also reduce the leaf surface evaporation, enhance the ability of the flowers to resist drought, and create cool and moist flowers. Excellent small environment. The third is to "avoid", that is, to prevent rain and rot. The summer rain is large and heavy, and the duration is long. The sudden cooling caused by rainfall can easily damage the root hairs. The water in the basin after the rain has hindered the respiration of the roots, which can easily lead to rot. The roots of the fleshy roots are more severe. Therefore, flowers that are in a weak or semi-dormant state in midsummer should be placed in a sheltered place to prevent rot. The fourth is "pass", that is, ventilation and air cooling. Respiration and photosynthesis of flowers must have sufficient fresh air. Poor ventilation can hinder respiratory function, affect the normal growth of flowers, and even lead to the death of flowers. The planting density of flowers and trees in open fields or flowerbeds should be appropriately reduced, and reasonable plastic trimming should be carried out to control the leggy of certain flowers and trees. China Agricultural Network Editor
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