The prevalence of avian leukemia

Avian leukemia J subpopulation

This is a new type of antigen that was first discovered in the broiler flock of England in 1989 and was discovered in the United States in 1990. It is present in all broiler flocks, so broilers were a major victim of J-leukemia 2 to 3 years ago and this is true throughout the world. It can also be spread horizontally or vertically, especially for smaller than 4 weeks of age. Chicken can cause bone marrow cell tumors. In the past, type J leukemia was very rare in layer chickens. In recent years, relevant experts have begun to conduct research. In 2004, the amount of J leukemia virus found in commercial egg farms was already high, at 30% to 80%. In the commercial generation of laying hens, leukemia occurs from time to time, and most of them are called myeloblastic leukemia, but have little to do with hemangioma in the ordinary sense.

Fertilizer pump mounted directly on the pipe, the kinetic energy of pipe flow to drives the pump to work at a set ratio to suck high erconcentration drug or quantitative fertilizer in to the pump. After mixed with the water and delivered to downstream.  No matter How to change the water pressure, Drug or fertilizer will be mixed and discharged according to a certain proportion.