First, enhance tree vigor and improve antifreeze ability 1. Control water rationally. Rainy years pay attention to drainage, so that the development of branches full and full, control watering late in the growth period, once before pouring water permeable. 2. Scientific fertilization. Adhering to the principle of “pre-promoting and post-controlâ€, in the later stages of growth, less nitrogen fertilizer should be applied, and more phosphorus and potassium fertilizers should be applied. Foliar fertilizers such as rare earth and potassium dihydrogen phosphate should be sprayed on the leaves to ensure that the tree body is robust and full, and antifreeze capability is improved. 3. Disease prevention and control. Preventing dry rot and early defoliation in time and protecting stems and leaves are important measures to prevent freezing damage. 4. Winter cut ahead. Winter trimming can be performed in early December to prevent shoots from drying out to facilitate wound healing. For pruning wounds, protectors should be applied.
Second, strengthen protection and avoid freezing injury 1. Spray protection. Spray Bordeaux fluid before winter arrives to prevent the occurrence of diseases. 2. The trunk is painted white. Before the winter, the trunk was painted white in combination with the clear garden. 3. Smoke smoke rises. In the early spring, the use of corn stalks (to be crushed), sawdust, and other smoke in the garden heat up antifreeze, generally 3 to 4 fires per acre can warm up 3 ~ 4 °C. Be careful not to ignite. If the material is too dry, spray water properly to take the smoke. 4. Plastic film package. Young trees that are susceptible to freezing can be wrapped in plastic wrap. Pomegranate tree more needles, easy to break through the film, should first pack grass, outsourcing plastic film. 5. Neck and soil. Before the soil is frozen, combine the cultivator on the roots of the tree roots to cultivate soil and the thickness is 20-40 cm. Before spring sprouting, choose the right timing to remove.
Premix: premix refers to the powder or granular preparation made by the uniform mixture of drug and suitable matrix. The premix was administered through the feed at a certain drug concentration.
Relevant regulations
1. The drugs in the premix should be dried and crushed first. Unless otherwise specified, it shall pass through No. 4 sieve completely, and the mixture of powder that can pass No. 5 sieve shall not exceed 10.0%.
2. The matrix used in the premix includes carrier, diluent, etc. The matrix should be stable, good fluidity, easy to mix with drugs and feed. The fatty matrix should be degreased first. In addition to the substrate specified under each variety, other suitable substrates can also be selected. In general, a single substrate should be used. The matrix shall not contain more than 20 parts per million of heavy metals; Arsenic salt shall not exceed 2 parts per million; The drying loss of inorganic matrix and organic matrix should not exceed 3.0% and 8.0% respectively.
3. According to the property of the drug, the drug can be dispersed evenly by proper methods. Appropriate methods should be used to make the drug mix evenly in the preparation of low concentration drug premix.
4. The premix should have good fluidity and be easy to mix with feed.
5. Unless otherwise specified, the premixes shall be stored in a closed container. The premixes containing volatile drugs or easily hygroscopic drugs shall be stored in a closed container, and the microbial limit shall be controlled.
6. Unless otherwise specified, the label of premix shall also indicate the name of matrix.
Premix Veterinary Medicine,Veterinary Multivitamin Premix,Veterinary Florfenicol Premix,Veterinary Oxytetracycline Premix
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