Banana is a perennial plant. How to protect it from cold air?

The temperature is low in winter. Bananas exposed to the outside for too long will be directly frostbitten and discolored by cold air. Therefore, when ripe bananas need to be preserved, they must be sealed with plastic bags. In winter, warm and heat-insulating fertilizers should be applied to bananas to increase soil temperature and enhance the cold resistance of plants. For example, apply more manure, pig manure, cow manure, horse manure, sheep manure and other organic fertilizers, and spray 25mL antifreeze on the leaves to mix with water. Enhance cold resistance. Once severe weather such as frost, cold current and cold air occurs, banana leaves will be burnt, the development of flowers and fruits will also slow down, and the fruits will be small, thick and incomplete.

Timely irrigation to prevent cold: the seasonal climate is dry, often accompanied by strong northwest wind, and the banana garden consumes a lot of water, so it is often in a state of water shortage. Before and after frost, "racing water" should be watered in time to improve the heat capacity and thermal conductivity of soil and play a role in preventing cold and freezing; In winter, winter fertilizer should be applied well to raise the soil temperature and enhance the cold resistance of plants, but it is best not to use nitrogen fertilizer, which will make plants grow rapidly, consume nutrients, make new leaves too light green and have low cold resistance.

In order to avoid freezing injury to bananas, it is necessary to spray some drugs on their leaves to make them grow rapidly, once every 7 days to 10 days, and topdressing outside the roots can regulate the growth of bananas with drugs. Plastic film mulching is the most widely used cold-proof measure for bananas in Guangxi. Due to the limitation of banana plant height and high cost, plastic film mulching measures are only used in some newly planted bananas or banana plantations, but the effect of plastic film mulching is better than that of plastic film. Pay attention to irrigation and drainage, clean up the drainage ditches around the dug fields and between banana beds, eliminate stagnant water, and prevent water from invading the roots and affecting growth. Pay attention to watering during drought, and cover the tree tray with straw. Keep the edges moist and loose, and promote multiple new roots. Loosening soil in banana orchard can improve the physical and chemical properties of soil, make the soil loose and breathable, and have a good structure. Loosening time should be early, and the pit bottom should be cleaned in time after spring warming, and the frozen residual plants should be removed at the same time. After May, when plants enter vigorous growth, mud can be applied.