How much cows should eat under different circumstances
The time to reach the maximum dry matter intake (DMI) for cattle cannot be later than 10 weeks after birth. During the intake of maximal dry matter, cows should consume at least 4% of their dry matter. For example, a cow with a body weight of 600 kg should ingest 600 kg of 4 = 24 kg of dry matter. Cows who are milking three times a day should consume 5%-6% more dry matter than cows who are milking twice. When properly fed, the estimated dry matter intake should be: DMI (kg) = A0.02 body weight + 0.34% corrected milk volume + B Where: A is the corrected lactation day, B is the daily gain, and the estimated daily weight gain When it is positive, B is 1, and when it is weightless, it is 0. A=1-0.2[(80-day of lactation)80]. For example, the cow has a body weight of 600 kg, a lactation day of 70 days, a daily corrected milk production of 40 kg, and a corrected lactation day of A=1.0-0.2[(80-70)80]=0.975, DMI=0.9750.02600+0.340+0=23.7. Kg dry matter. It is expected that at least 1 dry matter should be ingested per 2 milk cows. Below this standard will lead to excessive body weight loss and excessive metabolism. Cows are often used to feed after milking, so there should be fresh feed in the feed tank after milking to encourage cattle to increase total dry matter intake. High-yielding dairy cows eat 12 times a day, each time an average of 23 minutes, should adjust the feeding plan to adapt to the feeding behavior of cattle. If possible, the first fetus should be isolated from other adult cattle. Because in this case the first fetus will spend 10-15% more time than other cows. The best dietary dry matter content is 50% to 75%. Diets that are too wet or too dry will limit feed intake. If feeding silage with >50% water content, for every 1% increase in moisture, dry matter intake is expected to decrease by 0.02% of body weight. Here, due to the long fermentation time of the wetted feed, the acid level is increased and protein degradation is increased. For example, a diet containing 60% water, 100.02% 600kg body weight = 1.2kg dry matter, which means that the daily intake of dry matter for this cow will be reduced by 1.2kg, which means that the daily milk production will be reduced by 2.3-3.0kg. If you use a fully mixed diet with a weight-sensing device to feed a hybrid vehicle, the moisture of the silage should be checked weekly using a microwave balance. Changes in the moisture content of the silage can change the coarse material of the diet: the proportion of cereals, which will lead to reduced appetite and reduced dairy fat rate. If the cow's intake is lower than normal, non-fibrous carbohydrates and fiber content and length should be re-examined, and moisture and forage must be tested for mold. When the temperature exceeds 24°C, the consumption of dry matter in the cow will decrease by 3.3% for every 2.2°C increase in temperature. When the temperature exceeds 27°C, the relative temperature exceeds 80%, or the sum of two items exceeds 140, the cow will experience a stress response. It is expected that the milk consumption of 1 kg of milk per cow should reach 4.4 liters. If the bacteria index of drinking water is high, chlorine disinfection should be considered. Feeder design should be considered. When the bull head is forced to feed as grazing, it will spend more time feeding and secrete more saliva to buffer the rumen environment. During the hot season, feed at least 60% of the diet in the evening. The corn silage or cereal silage has a PH value of ≤ 4.2, and legume silage its PH value should be ≤ 5.0. If the silage PH is too high, it will increase the chance of corruption and shorten the time available in the feeding tank. Every day feed should be guaranteed in the feed tank for 20 hours, try to feed 3 hours per day. Give each cow a 60-75cm slot and clean the feeder daily, especially during the hot season. Adjust the feed in the feed tank to encourage cattle to feed more, regularly drive the cows to feed at night, and provide lighting. Total income exceeding feed costs is an important economic indicator and is simpler than calculating feed costs per 100 kg of milk. (Source: Rural Newspaper)
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