Orchard uses biogas slurry to prevent disease and increase yield

Fruit trees are sprayed with biogas slurry to be used for foliar sprays. They are fast and efficient (80% of the spray volume can be absorbed by the leaves within 24 hours), which can supplement the needs of fruit trees for nutrient growth. Spraying biogas slurry during the growth period of leaves can increase the ability of photosynthesis, which is conducive to the formation and differentiation of flower buds. Spraying biogas slurry at the flowering stage can ensure the nutrients needed during the flowering period and increase the fruit setting rate; spraying the biogas slurry during the fruit growth period can Promote fruit enlargement and increase yield. At the same time, it has certain prevention or mitigation effects on fruit tree pests and diseases. Spraying time Before and after each growing period of fruit trees, biogas slurry can be sprayed. Spraying concentration Usually, it is better to spray with pure biogas slurry. However, when the temperature is high, the concentration of the biogas slurry should be appropriately reduced, and an appropriate amount of fresh water can be added to the biogas slurry to prevent the water from evaporating too quickly when the temperature is high. The use of biogas slurry has certain control effects on fruit tree aphids and red spiders. After 48 hours of spraying biogas slurry, the reduction rate of pests can reach more than 50%. With biogas fermentation broth and appropriate amount of pesticides, the pest control effect will be more pronounced. The fine spray is used to remove the biogas fermentation broth from the water pressure of the biogas digester, and spray it for 1 to 2 days. If you use biogas in a biogas slurry tank (or overflow tank), you can use it immediately. When the biogas slurry is sprayed, it is necessary to focus on the back of the leaf (because the surface of the leaf is thick in keratin, it is not easy to absorb the biogas slurry, and the back of the leaf is easy to absorb the biogas slurry). It is better to combine spraying pesticides. Spraying biogas slurry is generally performed every 10 days or so. The amount of spraying can be determined based on factors such as the size of the crown, the nutritional status of the tree, and other factors. For fruit trees with many years of results, due to excessive nutrient consumption, 0.05% to 0.10% urea can be added to the biogas slurry to increase the nitrogen concentration, which can effectively increase the amount of flower buds in the following year. For young fruit trees that grow too young or growing too vigorously or fruit trees with less fruit in the current year, 0.2% to 0.50% of phosphorus and potassium fertilizers can be added to the sprayed biogas slurry to promote the formation of flower buds in the following year. Caution Do not spray at high temperatures at noon. Because of the high temperature, the water evaporates too quickly, which seriously affects the spraying effect and easily burns the leaves. The use of biogas slurry in the roots of fruit trees can be used in addition to the application of biogas slurry for top dressing. In addition, biogas slurry can be used for the top dressing of fruit trees. Different ages of fruit trees should use different root dressing methods. The top dressing method for saplings is to open the saplings to a circular groove around the saplings. The ditch should not be too deep to avoid damaging the root system. Generally about 10 to 35 centimeters deep and 20 to 30 centimeters wide, the biogas slurry is applied to the ditch. Then cover with soil. The application rate is about 50 kg/plant and it is applied 4 to 5 times a year. After each year, the amount of fertilization should be shifted to open the hole, and gradually expand outwards to increase the absorption range of the root system, giving full play to the fertilizer effect. When mature trees are ditched, attention should be paid to radial sulcusing. The sulcus should not be opened too deep. The application should be performed 10 days before flowering and once during fruiting. Afterwards, every year, fertilization should be done in the wrong position and expand outwards to increase the absorption range of the root and give full play to the fertilizer effect.

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