"eight-character formula" for cold prevention of flower seedlings in deep winter and matters needing attention for replenishing water with edible fungi

In the cold winter, it is necessary to prevent cold in order to avoid the harm of low temperature for the seedlings of southern species moving to the north, newly transplanted seedlings and 2-year-old flowers and cold-resistant perennial flowers cultivated in open field. The author will now summarize the "eight-character formula" to introduce the supply of flower lovers for reference.

Suitable, (adapt to local conditions and suitable trees). According to the local climatic conditions, plant cold-resistant trees and flowers.

Strengthen cultivation management and enhance the cold resistance of seedlings. Through rational irrigation of seedlings, scientific fertilization (such as less nitrogen fertilizer in autumn, control seedling overgrowth) and other measures to promote seedling growth and enhance its own cold resistance.

Pour, (pour frozen water and return to green water). If the soil is watered once before freezing, and there is more water in the soil, the surface ground temperature will not drop too low or too fast in severe winter, and the surface ground temperature will rise slowly in the beginning of spring. Pouring green water is generally carried out in early spring, because of the large temperature difference between day and night in early spring, pouring green water in time can relatively reduce the temperature difference between day and night on the surface and avoid the harm of spring cold to plant roots.

Set up, (set up a wind barrier). For newly planted or introduced tree species, plastic sheeting is used to protect against cold on the windward side or outside the plant, and some varieties need to be covered with grass curtains (such as big-leaf boxwood moving from the south to the north, etc.) can generally be adapted after 1 or 2 years.

Defense, (tree trunk protection). It is common to wrap or whiten tree trunks. Trunk wrapping is mostly carried out before the beginning of winter, winding or wrapping the trunk of newly planted trees or cold-resistant varieties with grass ropes or sacks, with a height of about 1.5 to 2 meters. Trunk whitening is generally carried out in autumn, whitening the trunk with lime water plus salt or stone sulfur mixture, using white to reflect sunlight, reducing the trunk's absorption of solar radiation, thus reducing the diurnal temperature difference of the trunk and preventing the bark from freezing. In addition, this method also has a certain effect on the prevention of pests.

Cover, (cover). It is mainly used for flowers in the open field in the nursery, covering hay, straw mat and horse dung on the ground before frost. This method is economical and good, and its application is very common. In addition, it can also cover materials such as plastic film, but it needs certain economic conditions.

Smoke, (fumigation). It is often used for flowers in the open field of the nursery. It is usually carried out on a sunny night to light the haystack and use smoke to reduce the heat loss of the soil. When the temperature is too low, the effect of using this method is not obvious, and it causes some pollution to the environment. Therefore, this kind of cold prevention measures should be avoided as far as possible near the urban area.

Heap, (heap earth against cold). For some perennial flowers or shrubs, pile up a 30-40 cm high mound around the rhizome after pouring frozen water, and the mound should be solid. (source: rural public)