如何养牛（How to raise cattle）.doc

如何养牛（How to raise cattle） How to choose a good type of cow Raise cattle to see the body size cow whole body tall, stretch, the body height is 1.4 ~ 1.5 meters, bosom wide, body deep, the back waist is straight, the abdomen is big and not droop, the waist combines tightly. The three triangular Outlines are obviously triangular in the front, side and back. Look at the shiri part of the milk cow should be long, flat and wide. The waist Angle is higher than the nodules of the sciatic tuberosity about 4 cm, and the two ischial nodules are over 18 cm wide. Look at the wide, flat, flexible, flexible, strong and strong legs. Hind legs side as sickle bending (hock is 145 ° Angle), hind legs after parallel. Hoof Angle 65 °, heel depth in 2.5 centimeters of above. The four hoofs of the hoofs are intact, and the inner and outer hooves are closely symmetrical. The breast breast development is full, the bath basin shape, forward extension. The texture is soft and delicate and elastic. The four milk areas are evenly distributed and the cleavage groove is deep. The milk vein is large and curved. The nipples are born in the middle of the base of the breast, and the nipple is moderate in size, 4 ~ 5 cm long, and vertically cylindrical, with a symmetrical spacing. Looking at the age to buy the cow should choose the cow that after primary birth, 3 tyre, this age group of cow general physical health, and with the increase of the number of the number of birth, produce milk quantity increment, raise the efficiency is high. Look at the cattle, try the grass, test the material, check the excrement, according to its feeding speed, the amount of food intake, the excrement dried to judge its health condition. Look at files for three generations of cow pedigree archives to understand the pedigree of the cattle. View the production records and understand the daily production of cattle. How to sterilize the cattle house I. methods of disinfection 1. Mechanical clearance. It is mainly through clea