The spraying of biogas slurry to the tree has better control effect on insect pests, especially it can inhibit the damage of aphids and spider mites. Biogas fertilizer includes biogas slurry and biogas residue. Biogas residue is mainly used as base fertilizer for fruit trees and base fertilizer in winter. Biogas slurry can be used for top dressing and foliar dressing.
Application of biogas residue. Biogas residue refers to the bottom sediment of organic matter such as human and animal feces after anaerobic fermentation to produce biogas. Biogas residue is used as the base fertilizer for fruit trees, which is beneficial to the activity of soil microorganisms and the formation of soil aggregate structure, which can improve the soil. When biogas residue is used as base fertilizer, it is necessary to dig a hole first according to the requirements for the growth of fruit trees, and then it is used for layered fertilization. Generally, the amount of fertilizer applied is 30 kg of biogas residues per hole, and can be supplemented with other element fertilizers according to different fruit tree varieties and growth conditions. When biogas residue is used as a base fertilizer for mature fruit trees, it will be decomposed after mixed straw, bean cake, and soil are piled up in the early November of each year, and then buried in a fertilization ditch outside the canopy drip line. The dosage is generally 50 kilograms per plant of residue, 1.5 kilograms of superphosphate and 2-2.5 kilograms of soybean cake, and 100 kilograms of straw and waste fertilizer.
(1) The use of biogas residue from young trees should be combined with expanding the hole. The diameter of the crown can be turned outwards in a circular direction. The ditch should not be too deep. Generally, the depth of the ditch is 0.10-0.35 meters and the width is 0.20-0.30 meters. Cover soil, afterwards every year, dislocate and apply fertilizer to open holes, and expand outwards to increase the absorption range of the roots and give full play to the fertilizer effect. Mature trees can be radiated and ditched, with a depth of 0.2-0.4 m and a width of 0.3-0.4 m. When you open the ditch, do not damage the root system and fertilize the soil. Afterwards, the location should be changed every year when applying fertilization.
(2) Application of biogas slurry: Biogas slurry is a bright brown liquid formed by the decomposition of the fermented material in the biogas digester. The quick-acting nutrient composition in the biogas slurry is high, and it is effective for the top-dressing and foliar fertilization of the fruit trees to obtain a rapid and high utilization rate. Within 24 hours after application, roots and leaves can absorb about 80% of the spray volume, thus timely supplementing the fruit tree growth needs of nutrients. The aboveground part of the fruit tree can be sprayed with biogas slurry before and after each growth period. When biogas slurry is used as top dressing, it should be diluted with water for 2-3 times before use to prevent excessive concentration and burn the root system. 10 days before the budding of the fruit trees, 60% of biogas slurry was used to fertilize with 2 kg of water per plant; 15 days after the new roots were planted, 5 kg of biogas slurry was applied to 3 kg of each plant. In order to accelerate the growth of saplings, the slurry can be applied once every two weeks or one month during the growth period. The method of fertilization is to dig 10-15 cm shallow trenches outside the crown of the canopy. 4 When biogas slurry is used for flower protection and fruit fertilizer, the biogas slurry fertilizer is sprayed once before flowering and before two physiological fruit-falling. The specific method is to grow normal trees and spray pure biogas slurry. 15 An O.2% urea should be added to ensure that the fruit concentration should be increased from 5 parts per million to 10 parts per million, which can increase the fruit setting rate by 5-10%. For fruit trees with many results, 0.05-0.1% urea can be added to the slurry. For fruit trees with young or fruit-bearing fruits, 0.2-0.5% of phosphorus and potassium fertilizer should be added to the biogas slurry to promote the formation of flower buds in the following year. Fruit enlargement needs fruit trees with a large amount of water, which is a key period for improving yield and quality. The number of sprays can be determined according to the weather conditions, how many fruits are carried, the vigor of the tree, etc., and can also be added in the biogas slurry sprayed per acre. 0.10-0.15% of urea and 0.01-0.33% of potassium dihydrogen phosphate. In the period of more pests each year, choose the afternoon when the temperature is higher, and remove the biogas slurry immediately after filtering it out with gauze (the biogas slurry should not be stored for more than one hour). Spray the fruit and leaf surface with a sprayer to control pests. If you add an appropriate amount of detergent and pesticide in the biogas slurry, the effect will be better. By using this method to prevent aphids and red spiders of fruit trees, pests can be reduced by more than 50% within 48 hours.
Hospital Bed, also known as hospital bed, Hospital Equipment, Nursing Bed, etc., is a hospital bed used by patients when they are hospitalized in the hospital.
There are many classifications of medical beds, and the specific classification methods are as follows: According to the material, it can be divided into ABS medical beds, all stainless steel medical beds, semi-stainless steel medical beds, all steel sprayed medical beds, etc.
According to the function, it can be divided into electric medical beds and manual medical beds. Among them, electric medical beds can be divided into five-function electric medical beds and three-function electric medical beds. Manual medical beds can be divided into double-shake medical beds and single-shake medical beds. Medical beds, flat medical beds.
According to whether it can be moved, it can be divided into a wheeled medical bed and a right-angle medical bed. Among them, electric medical beds are generally movable with wheels.
In addition, there are other special function beds, such as: ultra-low three-function electric bed, Hospital Bed For Home, hospital bed with bedpan, scald rollover bed, rescue bed, mother-child bed, crib, child bed, ICU monitoring bed, examination bed, etc.
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