| 摘要 |
FIELD: animal husbandry, veterinary. SUBSTANCE: proposed apparatus comprises semen-filled tube and stylet. Tube interior houses piston made of polymer and having cylindrically shaped body with expanded ends. Frustoconically shaped projection having smaller diameter than piston is attached by its base to cylindrical body. Three-step cylindrical cavity having constrictions at junction point of each step is formed inside piston body and projection. Tip of metal stylet is provided with circular groove, diameter of which is close to, or coincides with, diameter of constrictions of three-step interior cavity of piston. Apparatus can be used for artificial insemination of cattle, cows and heifers, with semen frozen in granules and defrosted without using sodium citrate. Invention can be used both on large scale in cattle-raising enterprises and farms, and in private households. EFFECT: enhanced efficiency in inseminating cattle. 3 dwg |
