The cold wave is coming, how should the Miao people deal with it?

Rain, snow and frost brought by cold wave will freeze garden seedlings. How to solve this problem?

Water and fertilizer management of overwintering seedlings

1. Water science antifreeze.

Before the soil freezes, water should be poured once, and trees should not be watered with antifreeze too early or too late. Can it be thawed during the day and quickly frozen at night? Watering time. After the soil moisture content is much higher, the surface temperature will not drop too low or too fast in severe winter, but will rise slowly in spring.

2. Apply overwintering fertilizer

When trees enter autumn, they should supplement sufficient nutrition, enrich their tissues and nutrition, and enhance the resistance of plants. First of all, it is necessary to supplement trace elements in a balanced and appropriate amount; Secondly, proper application of phosphorus, potassium fertilizer and sugar substances beneficial to metabolism can enrich plant tissues and improve cold resistance; In view of the cold protection of weak trees and ancient trees, they should be hoisted in advance. Special nutrition injection for young people? Special stick fertilizer for big trees combined with root application can scientifically and effectively supplement nutrition, enhance tree vigor and improve cold resistance of trees.

Heat preservation and anti-freezing measures for seedlings

1. Cultivate the soil of seedling roots.

After the winter irrigation is completed, the weir is sealed and the cultivated mound is between 50 and 80 cm in diameter and about 30 to 50 cm in height. This can not only reduce the excessive evaporation of soil moisture, but also ensure that the root neck and roots are not frostbitten by low temperature.

2. Drainage, covering and heating

Clean the ditches in time, drain the accumulated water in the nursery to prevent the roots of seedlings from freezing and frostbite. Before the cold wave comes, cover the seedlings with straw and film. Or wrap the whole seedling with plastic film or other thermal insulation materials to prevent cold; Trees should be covered with film; A few rare tree species that are not cold-resistant adopt methods such as covering the soil to prevent cold or building insulation sheds to keep warm.

Paint the trunk white.

The branch whitening technology is to smear the branches of trees with limestone-sulfur mixture, which can not only kill overwintering pests, but also protect the bark on the sunny side of the trunk and avoid injury due to the temperature difference between day and night. The time point of white washing is generally in the late 10 or the middle of 1 1 month, and the selection of time is strictly regulated and cannot exceed this time period. Therefore, the painting material may fall off in pieces at low temperature, and the purpose of painting cannot be achieved.

Use antifreeze

1. Spray in advance? Cutting-edge control agent

The twigs have high water content and are vulnerable to freezing injury in winter. The experiment showed that spraying 1 ~ 2 times of bud inhibitor (growth retardant) in advance before winter can accelerate the maturity and senescence of young leaves and branches, thus enhancing their frost resistance and avoiding and alleviating the occurrence of freezing injury.

Spraying antifreeze

Before freezing injury at low temperature, chemical agents with certain effects should be sprayed manually. Such as antifreeze, can quickly form a protective film on the surface of plant branches and leaves after spraying the tree body, which can block the invasion of cold current and monsoon, improve the cold resistance of plants and reduce the damage of wind erosion to branches and leaves. It has excellent effect in preventing low temperature disasters such as low temperature, weak light, ice and snow freezing injury, late spring cold and so on, and can obviously reduce the degree of freezing injury.

Repair and anti-freezing after snow

1. Snow

After snowfall, we should promptly organize manpower to knock down the snow on the crown, especially the evergreen trees with dense branches and leaves, and also organize personnel to clean them in time to prevent the branches from bending, being difficult to restore to their original state, or even breaking or splitting.

support

For a frozen branch, you can't beat it, but let it stand still; If the ice is too heavy, it can be supported, and then the bracket is removed after thawing.

Accumulated snow

The cleared snow can be accumulated around the roots of trees, which can effectively reduce the low temperature of roots, avoid the attack of supercooling and strong wind, humidify in early spring, reduce the soil temperature, and prevent the premature germination of buds from being harmed by late frost.

4. Irrigation after snow

Trees lose more water after freezing, and roots and trees are in great need of water. After thawing, water should be poured in time and filled at one time.