Frost damage and its prevention
The essence of frost and frost damage is the same and is caused by low temperatures. The difference is that frost damage is the damage of shoots and leaves after the mulberry sprouts in the spring or before the night frost, but the freezing injury is in the dormant period to harm the branches or roots. Frost damage: Morning or night cream can endanger mulberry trees. Early frost often leaves the tip and leaves of mulberry trees that are still growing in the autumn and are wilted and wilted, affecting the late autumn silkworm leaves. After the winter buds germinate in spring, in the event of late frost, the buds and leaves that have germinated are vulnerable, and the damaged parts of the light are discolored, and all the heavy ones die. Smoke is the most common way to prevent frost damage. Specifically, when frost weather forecast is heard, twigs, leaves, weeds, etc. are piled up in the windward area of ​​Mulberry Park and ignited at a proper time to allow dense smoke to permeate the air close to the ground and reduce the radiation of heat from the ground. Increase the ground temperature in order to achieve the purpose of antifreeze. In addition, in areas where frost is severe, attention should be paid to the use of mulberry varieties that have late germination and many sprouts. Once the mulberry tree suffers from frost, immediate fertilizer should be added immediately to promote the early germination of its latent buds and accessory buds, and the affected buds should quickly resume growth. The sturdy mulberry tree does not need to be cut after being damaged. As long as the fertilizer and water management is strengthened in time, the mulberry leaf will continue to grow after the temperature rises. Freezing damage: The mulberry tree may suffer freezing injury in the cold winter and spring seasons. In general, dwarf and low dry mulberry are seriously damaged. Preventive measures are: before and after the fallen leaves, the green part of the shoot tip is cut off; the plant is adapted to the cold-tolerant varieties of the local climate; the organic fertilizer is applied more, and the phosphorus and potassium fertilizers are added in the late summer and early autumn; the autumn is on the mulberry tree as much as possible. Leave more leaves to facilitate the accumulation of photosynthetic products and increase cold resistance.
Prevention of wind damage
Wind hazards often occur in the northern regions, and mulberry trees damaged by the wind not only affect leaf sericulture, but also are prone to insect pests. In regions with severe wind damage, it is best to create windbreak forest belts in the windward direction. Mulberry trees should be cultivated with low-dry or low-dryness, and pay attention to the management of fertilizers and water, promote deep roots and leaves, and increase wind resistance. When you know that the strong wind alarm, immediately use a rope to tie together a number of mulberry, to be solved in time after the wind. After the mulberry has been damaged by the wind, it is necessary to cut off the broken branches as soon as possible. For the mulberry trees that are lying on the ground, they should immediately support the soil. In the early stage of growth, the quick-acting fertilizers can be applied and the shoots can be cut to promote their re-emergence.
Harm and Prevention
For a mulberry garden with a low topography and a high groundwater level, the surface of the mulberry should be slightly curved and slightly higher in the middle. In the ditch between the ditches, sang orchard digs deep trenches around it, and the inside of the trenches are connected, and rivers and ponds are connected outside to facilitate the smooth flow of rain. The mulberry garden flooded with water will wash away part of the topsoil when the water recedes, causing a large loss of soil nutrients and soil compaction. Therefore, when the soil surface is slightly dry, it is necessary to work properly to improve the ventilation of the soil. To wash out the severe mulberry field, the mulberry tree should be straightened as soon as possible, and the roots should be well soiled and composted and fattened. The severely damaged mulberry garden will undergo spring cutting in the second year in order to restore its tree vigor.
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