Fruit tree freeze damage is divided into two categories: one is the winter frost damage of evergreen fruit trees such as citrus, pomelo, orange, etc., and the other is the early spring cold damage of deciduous fruit trees such as apples, pears, and grapes. No matter which type of frost damage is harmful to the fruit trees, most fruit farmers can only watch the years of hard work and destroy them.
In fact, once the fruit trees are subjected to freezing damage, if the measures are taken properly, not only can they achieve less losses, no losses, but even increase production and income, so the choice of measures is particularly important.
Here, we recommend to farmers friends a method and technology that can be used to prevent and rescue fruit trees from freezing damage after extensive production practice: foliar spray “Bi protectionâ€.
“VitaCat†is a pure natural plant-based plant protection product developed by Agfalais Environmental Biotechnology Company of Germany according to the principle of “plant allelopathyâ€. It has been certified by the European Union and the United States. The product not only lowers the root system, but also regulates the physiological effects of balanced growth of branches, leaves and fruits, and can also initiate the protection mechanism of the crop itself, so that the crops can produce system-induced resistance and resist the invasion of external biological or abiotic factors.
The anti-freezing mechanism is: after the application of "Bai", the respiratory rate is enhanced, the metabolic activity is increased, and the vitality is increased; the chitinase and proteinase in the plant can be effectively activated, the content of amino acid and chitin is greatly increased, and the cell membrane is increased. The content of unsaturated fatty acids makes them grow normally at low temperatures, thus preventing and resisting freezing damage.
On April 14, 2010, Shanxi, Shaanxi, Gansu and other places suffered from cold springs. Some farmers used this technology to avoid not only suffering losses, but also to increase production and income.
Li Manshun, Shangchao Village, Ronghe Town, Wanrong County, Shanxi Province, under the guidance of agricultural science and technology personnel, made a very significant test on the prevention and alleviation of freezing damage (temperature below 4 degrees) on the four-year-old red grape. effect.
On April 5, 2010, during the grape sprouting stage before the occurrence of frost damage, the mu was sprayed with 60 grams of “Bai Hu†and 60 kg of water; on April 15th, the second day of the freezing injury occurred again. "Bi-protection" 6 grams of water with 60 kg of foliar spray.
According to the survey results on April 20th, the average number of germinations per plant was 175, the number of frozen seeds was 35, the number of restorations was 160, and the freezing rate was only 5.7%. The average inflorescence was 8; the control area with "Bai" was not used. The average number of germination per plant was 165, the number of frozen was 132, the number of recovery was 13, and the freezing rate was 80%. The average inflorescence of a single plant was only 2 The use of “Bai Hu†to prevent and alleviate frost damage has been widely applied to fruit tree production in some areas. For example, Pinggu District of Beijing is the birthplace of the famous “Pinggu Dataoâ€, with an area of ​​more than 200,000 mu, which is valued in the local agricultural sector. Under, it has been widely applied. “Bi-protection†is becoming a “magic weapon†for local fruit farmers to prevent peach tree frost damage, resist natural disasters, and increase income and get rich.
How to use the evergreen fruit tree: Before the freezing damage, combine with the winter clearing garden, use 100 grams of water for each acre of “Bai Huâ€, 100-200 kg, combined with high-grade foliar fertilizer, chitosan oligosaccharides, etc. After 1-2 times, the freezing damage can be alleviated and restored.
How to use the deciduous fruit trees: Before and after the germination of the early spring fruit trees, before the freezing damage, use the “Bai Hu†6-9 g water 100-150 kg plus potassium dihydrogen phosphate (0.3%-0.5%), chitosan oligosaccharides Foliar spray can prevent cold and freezing damage. After the occurrence of freezing damage, the timely use of "Bi protection" 6-9 grams of water 100-150 kg + chitosan oligosaccharide and potassium fertilizer to make up the spray, 5-7 days after another use, the freezing damage can be alleviated and restored.
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