How to ensure banana safety in winter

Banana freezing injury seriously hinders banana production, so it is necessary to strengthen banana garden management before winter to protect bananas safely through the winter. The following measures can be taken according to the actual situation:

Banana bagging to protect against cold

1. Bananas that have ripe fruit should be harvested and put on the market in time to avoid aggravating the loss caused by freezing injury.

2. Bananas that have hung fruit and are not yet ripe should be applied extra-root fertilizer, such as potassium dihydrogen phosphate, high yield dew, etc., and bagged in time to prevent cold.

3. In the early stage of banana fruit hanging and young banana seedlings, rice straw can be used to cover the top of banana seedlings to reduce freezing injury, keep more than four green leaves as far as possible, and ensure nutrient supply.

4. Strengthen the management of water and fertilizer. If possible, control ditch irrigation to keep the soil moist in the banana orchard and increase the application of potassium fertilizer to enhance the cold resistance of banana seedlings.

5. when the frost injury is coming, when the frost is heavy and foggy, smoke method is actively used (that is, burning fire and smoking). This method can be used in the evening and lasts until 1-2 hours before sunrise. It can be divided into two kinds.

(1) smoking method: inserting a thick bamboo pole or wooden pile into the ground, stacking from inside to outside, the first layer of dry weeds, dry leaves, dry branches, etc., as ignition; the middle layer of wet straw, sawdust, fallen leaves, etc.; the outer layer is covered with 8-10cm soil, the stack height is 1-1.5m, and the bottom diameter is 1.5-2m, with 4-5 smoking spots per mu. Before ignition, draw the bamboo pole from the stack, ignite the dry firewood and grass in the hole, pay attention to the amount of smoke, make the stack smoke as much as possible and last as long as possible, which can increase the temperature near the ground by 1-3 ℃.

(2) smoke screen method: anti-frost fogging agent is made by burning smoke chemicals. This method has a large amount of smoke, and the smoke is as high as 5-7m, so it is suitable for adult banana garden. Formula 1, sawdust 57%, ammonium nitrate 30%, sulfur 10%, black powder 3%; formula 2, sawdust 35%, ammonium nitrate 30%, bituminous pulverized coal 25%, diesel 10%, proportionally mixed. Specific operation, take 1 kg of mixed ingredients, cover the bottom with Kraft paper (three to four layers), put a fire line inside, poke holes around the paper bag, and then ignite smoke, 2-3 packets per mu of banana garden.