After entering June, the weather began to be hot and the maximum temperature reached 35°C-36°C. Due to the underdeveloped sweat glands of dairy cows, the tolerance to high temperature and heat is poor, and heat stress reactions are easily generated. Dairy cows showed reduced feed intake, decreased milk production, silent estrus, increased incidence of estrus disorders, sunstroke, and heat-stroke (heat stroke). Little attention was paid to causing significant economic losses. In order to ensure the health of dairy cows, maintain the stability of milk production, and safely survive the hot summer season, the following tasks should be done in the process of dairy cows.
First, do a good job in the regulation of dairy cows After entering the summer, the temperature gradually increased, the weather was hot, dairy cows were affected by heat stress, feed intake decreased significantly, milk production also decreased. The problem of feeding and management of high-producing dairy cows is even more prominent. It is often unreasonable to mix the diet and ignore the single feed or roughage. In order to pursue milk production, some farmers do not adjust the combination of diets, mainly corn silage, but blindly increase the amount of fine feeding, which easily leads to acute and chronic rumen acidosis in dairy cows. Dairy cows refused to feed on fine supplementary materials, and only ate a small amount of silage or hay, resulting in a significant reduction in milk production, and metabolic diseases such as laminitis. Therefore, after entering the summer season, the lactating cows must feed hay. Each end should be guaranteed to feed at least 3 kg per day. The amount of silage fed is preferably no more than 15 kg per cow per day. It is also possible to increase the dietary concentration, increase the nutritional level by 10% on the basis of the cow raising standards, and also compensate for the nutritional deficiencies caused by reduced feed intake. The reduction in feed intake also presents a negative balance in energy supply, which is one of the important factors that cause a drop in milk production. Therefore, adding 1%-2% of ruminal fat-calcium fatty acid in dairy diets can reduce or reduce the consequences of heat stress.
Second, adjust the feeding method and feeding time during the hot summer daytime high temperatures, dairy cows poor appetite, at night, the weather is much cooler, the appetite of dairy cows is stronger than during the day. The three balanced feed feeding methods used in the past were changed to feed more in the evening and in the early morning; it was also possible to increase the number of feedings at night so that the cows’ intake at night would account for two-thirds of the total dry matter intake.
Third, drinking water The amount of drinking water in summer cows increases with the increase of temperature, milk cows drink about 130-170 liters a day. Heat stress increased the cow's drinking water by 1.2-2 times. Therefore, sufficient fresh water should be prepared for the cows to drink freely. If the conditions permit, the water in the water tank and the well water are circulated, and the temperature of the water is controlled below 25° C. After the cows drink, the effect of physical cooling can be achieved.
IV. Reducing the number of cows delivered during the high-temperature season in the summer season The metabolism of the cow during the perinatal period of dairy cows undergoes great changes, which are prone to metabolic diseases. The function of the rumen has not been completely restored after 6-8 weeks after the calving of dairy cows. At this stage, the cow's constitution is weak and its disease resistance is poor. If during the summer season when calving occurs, heat stress and calving stress occur at the same time, the health of cows will be severely damaged, and postpartum complications will be stimulated, often resulting in significant economic losses for cattle breeding. In order to alleviate this contradiction, in the estrus breeding of dairy cows, a good breeding breeding plan is made, and through the projection of the expected date of production, there is a plan for matching. In other words, the number of breeders will be reduced as much as possible in October and November each year to avoid or reduce the number of calving in the summer and July seasons.
Fifth, there should be ventilation and ventilation facilities.
The design of the dairy cowhouse is enclosed and front open, and each has its own merits. Closed cow houses should be equipped with ventilation facilities, and ventilation fans and exhaust skylights should be installed on the roof. First, harmful gases such as ammonia can be vented to keep the air in the cattle house fresh. Second, the hot air is discharged to reduce the temperature of the cowshed. The front-opening cow house also has a ceiling fan. A ceiling fan is set for every 4-5 cows. When the weather is hot, the cow opens the fan and the air is circulated to take away the heat from the cow's body surface so that the cow feels cool and comfortable. Good physiological state and lactating function.
Fourth, pay attention to the mildew and freshness of feed. Summer temperatures are high, rain, silage is easy to mold, and pellets are also susceptible to deterioration during storage.
First, do a good job in the regulation of dairy cows After entering the summer, the temperature gradually increased, the weather was hot, dairy cows were affected by heat stress, feed intake decreased significantly, milk production also decreased. The problem of feeding and management of high-producing dairy cows is even more prominent. It is often unreasonable to mix the diet and ignore the single feed or roughage. In order to pursue milk production, some farmers do not adjust the combination of diets, mainly corn silage, but blindly increase the amount of fine feeding, which easily leads to acute and chronic rumen acidosis in dairy cows. Dairy cows refused to feed on fine supplementary materials, and only ate a small amount of silage or hay, resulting in a significant reduction in milk production, and metabolic diseases such as laminitis. Therefore, after entering the summer season, the lactating cows must feed hay. Each end should be guaranteed to feed at least 3 kg per day. The amount of silage fed is preferably no more than 15 kg per cow per day. It is also possible to increase the dietary concentration, increase the nutritional level by 10% on the basis of the cow raising standards, and also compensate for the nutritional deficiencies caused by reduced feed intake. The reduction in feed intake also presents a negative balance in energy supply, which is one of the important factors that cause a drop in milk production. Therefore, adding 1%-2% of ruminal fat-calcium fatty acid in dairy diets can reduce or reduce the consequences of heat stress.
Second, adjust the feeding method and feeding time during the hot summer daytime high temperatures, dairy cows poor appetite, at night, the weather is much cooler, the appetite of dairy cows is stronger than during the day. The three balanced feed feeding methods used in the past were changed to feed more in the evening and in the early morning; it was also possible to increase the number of feedings at night so that the cows’ intake at night would account for two-thirds of the total dry matter intake.
Third, drinking water The amount of drinking water in summer cows increases with the increase of temperature, milk cows drink about 130-170 liters a day. Heat stress increased the cow's drinking water by 1.2-2 times. Therefore, sufficient fresh water should be prepared for the cows to drink freely. If the conditions permit, the water in the water tank and the well water are circulated, and the temperature of the water is controlled below 25° C. After the cows drink, the effect of physical cooling can be achieved.
IV. Reducing the number of cows delivered during the high-temperature season in the summer season The metabolism of the cow during the perinatal period of dairy cows undergoes great changes, which are prone to metabolic diseases. The function of the rumen has not been completely restored after 6-8 weeks after the calving of dairy cows. At this stage, the cow's constitution is weak and its disease resistance is poor. If during the summer season when calving occurs, heat stress and calving stress occur at the same time, the health of cows will be severely damaged, and postpartum complications will be stimulated, often resulting in significant economic losses for cattle breeding. In order to alleviate this contradiction, in the estrus breeding of dairy cows, a good breeding breeding plan is made, and through the projection of the expected date of production, there is a plan for matching. In other words, the number of breeders will be reduced as much as possible in October and November each year to avoid or reduce the number of calving in the summer and July seasons.
Fifth, there should be ventilation and ventilation facilities.
The design of the dairy cowhouse is enclosed and front open, and each has its own merits. Closed cow houses should be equipped with ventilation facilities, and ventilation fans and exhaust skylights should be installed on the roof. First, harmful gases such as ammonia can be vented to keep the air in the cattle house fresh. Second, the hot air is discharged to reduce the temperature of the cowshed. The front-opening cow house also has a ceiling fan. A ceiling fan is set for every 4-5 cows. When the weather is hot, the cow opens the fan and the air is circulated to take away the heat from the cow's body surface so that the cow feels cool and comfortable. Good physiological state and lactating function.
Fourth, pay attention to the mildew and freshness of feed. Summer temperatures are high, rain, silage is easy to mold, and pellets are also susceptible to deterioration during storage.
Three Layers Of Non-woven Mask
Hunan Kangfutai Medical Devices Co., Ltd. , https://www.3kfut.com