奶牛瘫痪_孙岩(国外英文资料).docVIP

奶牛瘫痪_孙岩 The prevention and control measures of the cows postpartum paralysis Sun yan, a food company in changchun, China Cow paralysis is an acute and comprehensive metabolic disease that occurs after birth. There are three kinds of cow paralysis: the paralysis caused by nutrient metabolism, the paralysis of mechanical injury, and the comprehensive paralysis of the cows obesity. etiology The cause of postpartum paralysis is more, but it is caused by insufficient blood calcium. A large number of Ca and P before the birth of the cow are brought into the breast by the blood, causing the body to reduce or lack of calcium. 2, due to the dry milk cow parathyroid hypofunction, reduces parathyroid hormone secretion, prevents the release of Ca, P, absorption, results in the decrease of ability to mobilise bone calcium, make a sharp drop in blood calcium concentration and pathogenesis. Also before and after childbirth from reduced the volume of small intestinal absorption of calcium, the late pregnancy fetal rapid increase, tire water increasing, the pregnancy uterine occupied most of the abdominal cavity space, squeeze the stomach, intestines, organs, influence its activity, reduce the digestive function, causes from the intestinal absorption of calcium quantity significantly reduced. During childbirth, the cerebral cortex is overexcited and then turned to inhibition. After delivery, the abdominal pressure drops suddenly, the blood is redistributed throughout the body, the internal organs are relatively congested, and the blood is heavily in the breast. Cause brain tissue of temporary anemia, postpartum blood into the breast synthesis of lactose, a large number of results in lower blood sugar and all of these can make the cerebral cortex is restrained, affect the function of the parathyroid gland, the secretion of hormones function decline, cannot make blood calcium to maintain normal levels, prompting the happening of the disease. 4, reduce the disease often associated wit