Phosphorus, potassium, boron fertilizers, plant ash, fired soil, soil miscellaneous manure, and decomposed pig and chicken manure are all warm fertilizers. Appropriate application can increase soil temperature and improve crop resistance to cold.
2. Take protective measures
(1) Covering. Before the severe cold comes, you can use the whole plant to build a straw scaffold to protect against the cold. For tall crops, you can use waste plastic bags to make a net cover, or cover with cold-proof materials such as straw curtains, which can increase the temperature by 2℃～3℃.
(2) Trunk bandaging. Before the severe cold comes, wrapping the main stalks and main techniques of crops such as fruit trees with straw or plastic film can effectively prevent freezing damage.
(3) Root soil cultivation. The crops are cultivated in high ridges before freezing, and the effect of cold protection is also very good.
(4) Irrigate before freezing. If the drought is severe in autumn and winter, you can irrigate it once before the severe cold, and if conditions permit, you can irrigate it again before the arrival of cold air for better results. After the crops are frozen, the leaves lose a lot of water, and they also need to be irrigated immediately to prevent the plants from losing a lot of water and dying.
Three, smoke to drive away cold
Before the low temperature comes or on the night of the frost, pile up weeds, chaff, sawdust, dry branches and leaves or other smoking materials in the crop field for smoking. Stack 3 to 5 piles per mu, and burn smoke at around 10 o'clock in the evening, and the appropriate time for marriage is 6 to 10 hours.
Four, spray antifreeze
Spraying plant antifreeze is one of the methods that saves labor and has a good antifreeze effect and has a good disaster reduction method. The temperature above -5°C can prevent crops from frost.
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