Recently, Qin Shanshan, a farmer in Anhui province, called to ask why cows are particularly vulnerable to perinatal diseases. On December 31, 2015, the reporter interviewed Prof. Lin Qing of Animal Science and Technology College of Northwest Agriculture and Forestry University on this issue. According to Lin Qing, cows are called perinatal during the prenatal and postnatal period of 15 days. At this time, the cows have poor constitution, weak disease resistance, and low adaptability. They are easily affected by external environmental factors and become infected. The main reason for the proneness of dairy cows is that the farmers do not have enough patience for the perinatal dairy cows and lack scientific scientific management. Some breeders ignoring dry cows mistakenly believe that dry cows do not produce milk. They don't feed or feed concentrates. Feeding poor quality roughages results in nutritional deficiencies in dairy cows during the second trimester. In this regard, Lin Qing said that dry cows should also be reasonably placed in the feeding of rough materials, to adjust the nutritional balance, to meet the needs of the protein within its production cycle. Lack of obstetric management knowledge Milk cows with weak constitutions in the early stages of lactation (15 days after delivery), such as milking prematurely, feeding large quantities of concentrate, and milking in large quantities, can have serious consequences. For example, mass milking can cause postpartum cramps; prematurely feeding large amounts of concentrate can cause cows to have true stomach dislocation. Therefore, the amount of concentrate can only be increased after the cow's breast edema has subsided and the lochia has been cleaned. Lack of management experience during the perinatal period Cows have severe breast edema after delivery. They must use mechanical milking before their breasts are swollen. Otherwise, milking can only be done by hand. At this time, postpartum cow movement should be strengthened, and high quality roughage should be added. The amount of green and succulent feedstuffs for feeding, while strengthening postpartum care, established a routine disinfection system. Lin Qing reminded farmers that they should do a good job in the environmental hygiene of the barn and prevent them from failing to make up the tires, so that the cow's lochia can be drained as soon as possible and the uterine form and function will be restored as soon as possible. Greenhouse Film Electric Roll Up The Greenhouse Film Manual Roll Up Unit can roll up a length of 60-80 meter, running stably with fine out side looking and long time of usage. The inside drive gears are made of high quality steel with fine workmanship, and what is more, there is lubricating bearing assembled on the out put and input shaft. At the meantime, there is also a group of reverse gear added to it. All these make the unit to be light and easy for Greenhouse Film Electric Roll Up,Roll Up Curtain Greenhouse,Greenhouse Film Vent Roller,Greenhouse Roll Up Motor JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.skyplantgreenhouse.com