In recent years, with the development of large-scale breeding of cattle and sheep, in order to increase the milk production of cattle and sheep and the rapid fattening of cattle and sheep, most of the cattle and sheep breeding methods are adopted to give concentrates, sometimes not even for roughage. The feeding management method of non-grass animals feeds cattle and sheep, causing disorder of "rumenal stability" of cattle and sheep, thereby causing various diseases. QDC China Feed Industry Information Network - based on feed, serving animal husbandry
Acute rumen acidosis
Excessive intake of high-carbohydrate feed for ruminant livestock can cause an increase in lactic acid concentration and a decrease in pH of the rumen contents. According to the data, when the pH of the rumen contents drops to about 5.0, saliva secretion and rumen peristalsis are inhibited, so that the amount of saliva that neutralizes and dilutes the acid is reduced, and the pH of the rumen contents is also lowered. As the rumen peristalsis is weakened, the rumen contents are transported to the valve stomach, resulting in a strong acidity and high osmotic content. The rumen contents stay in the rumen for a long time, which promotes dehydration more severely, and saliva secretion and rumen peristalsis are more inhibited. Become the basis of a vicious circle. This phenomenon exists for a long time, causing not only dehydration, blood concentration, acidosis, but also damage to the rumen mucosa, causing inflammation, bleeding or nipple loss. At the same time, the rumen wall is easily damaged by feed debris, infection and suppuration, bacteria invade from the wound and enter the bloodstream. Causes metastatic abscess. Cattle that has eaten broken corn or barley can cause sick cattle to die in about 30 minutes due to acute acidosis in the blood.
Rumen keratosis
Rumen keratosis - rumen - liver abscess syndrome has also attracted attention in Japan, the relevant departments conducted a survey in Miyagi Prefecture, the results show that the incidence of this disease is high, and the condition is serious, in 272 slaughtered cattle, each The incidence of lesions was: rumen mucosal keratosis 61.8%, acute rumenitis 22.1%, liver abscess 7%, chronic gastritis 6.6%, rumen ulcer and scarring 2.5%, and cattle weight gain was found in this syndrome Slow, the muscle mass and grade of the limbs are significantly reduced, and it is prone to diseases such as anterior gastric flaccidity and valvular obstruction.
In the future, many people discussed the cause of this syndrome. First, Jinsen's method of artificially producing keratosis and keratosis was successful. Many people follow the test and get the same results. Therefore, it has been determined that the concentrate is too much, and the lack or deficiency of the crude material is the cause of keratosis.
Because the roughage has a certain hardness, it moves in the rumen with the rumen movement, friction with the rumen wall, enhances the vitality of the nipple and increases the thickness of the rumen wall, thereby strengthening the contractile force and exercise capacity of the rumen. In addition, it can stimulate ruminant, enhance saliva secretion, dilute and neutralize excessive acidic substances, keep the pH value of rumen contents constant, and make the rumen contents smoothly enter the stomach and net stomach and later digestion. Road.
Arid stomach disease
Recently, many studies have confirmed that abdomen dislocation occurs on the basis of reduced abdomen tension, relaxation, expansion or accumulation of gas. Some people think that the compression of the enlarged pregnant uterus can make the wrinkle stomach relax, expand, accumulate and displace. However, this disease also occurs in non-pregnant cows or bulls. Therefore, pregnancy cannot be considered as an important cause of this disease.
In summary, ruminant livestock feed too much concentrate, not only can cause rumen acidosis, rumen keratosis - rumenitis - liver abscess syndrome, atrophy and milk fat rate, and can cause grain bloating, hoof Diseases such as leaf inflammation, anterior stomach flaccidity, valvular obstruction, rumen food accumulation, etc., seriously affect the health and economic benefits of ruminant livestock. Farmers should pay attention to the reasonable mix of refined roughage in the production process.
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