Fruit and Fruit Management of Almond (American Almond)

Frost protection technology

In order to avoid the danger of night frost, the establishment of the park has been fully considered in terms of site selection, species selection, shelter forest construction, etc. However, sooner or later, the occurrence of night cream differs depending on the year. Some years are days later and some years are days later. . If you do not prevent it in time, you will lose money. Therefore, we must pay attention to the weather forecast, take measures before the night frost, and generally use the following measures to prevent:

1, delayed germination

(1) Decrease the temperature of the soil by spring irrigation to delay germination. After germination to irrigation before flowering 2-3 times, generally delayed 2-3 days.
(2) The main body and the main branch of the tree are coated with white, which can reduce the absorption of solar heat, delay germination and flowering, reduce frostbite and sunburn, and control pests that overwinter under the rough trunk of the trunk. The whitening agent generally uses 10 parts of water, 3 Parts of lime, 0.5 parts of salt, and 0.5 parts of lime sulfur stock solution, plus a small amount of animal and vegetable oils.
(3) Application of growth regulators such as B-9, ethephon, naphthalene acetic acid, and amikacin (AM) to spray on the trees before the winter or before germination can inhibit sprouting. The most widely used is 5-200% of the fresh green pigment. In the bud expansion period, the flowering period can be postponed for 4-6 days, and more than 20% of the flower buds can be protected from frost. Before the application of growth regulators, a small area test should be conducted before promotion.

2, improve the garden microclimate

(1) Smoke smoke method: In the case where the minimum temperature is not lower than -2°C, smoke can be smoked in almond trees. Smoke smoke can reduce radiation loss of soil heat, while smoke particles absorb moisture, make it form a liquid and release heat, increase the temperature, in recent years, the use of formulated anti-frost aerosol agent in some areas, the effect is very good. When the night cream comes, the medicine is placed according to the wind direction, and it is ignited before the defrosting, which can increase the temperature by 1-2°C. The smoke curtain can be maintained for about 1 hour.
(2) Artificial water spray: Before the arrival of night frost, use artificial spray equipment to spray water on almond trees. When water condensation occurs, it can release latent heat, increase temperature and reduce frost damage. Adding 0.3%-0.5% potassium dihydrogen phosphate to water can enhance the cold resistance of almond flowers.
(3), using a hair dryer to prevent frost, more foreign applications, good results.

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