The current research on the health effects of cows fed a corn-based ration has several shortcomings. These weaknesses include a lack of information about the chemical composition and particle size distribution of the feed, and the high cost of pasteurization. To overcome these limitations, the current research aims to improve the nutritional value of milk produced by late-lactation dairy cows. However, further studies are needed to determine the exact benefits of such a ration.
HE nutrient recovery in milk of late-lactation dairy cows
In this study, HE nutrient recovery was measured in the milk of late-lactation dairy cows fed a conventional diet and a by-product-based diet. Although ECO diets resulted in similar HE nutrient recovery, by-product-based diets could not maintain equivalent milk yields in all the cows. This result could be attributed to assumptions about the composition and value of feed ingredients and parity of the cows.
By-product-feed inclusion improved HE nutrient recovery in milk. Similar results were observed in previous studies. In Experiment 1, by-product-feed inclusion enhanced HE nutrient recovery by up to 13% and 22%, respectively. These findings were consistent with previous findings showing recoveries of 367 to 495% and 267 to 441%, respectively. Therefore, the inclusion of by-product-feed in dairy production may improve the milk yield of late-lactation dairy cows.
In another study, researchers studied the effects of butyrate supplementation on methionine bioavailability and antioxidant production in rumen-protected neonaute bovine hepatocytes. The study was published in J. Dairy Sci. 100(8):8-27. The results indicate that microbial methionine can enhance HE nutrient recovery in milk of late-lactation dairy cows.
Effects of temperature on HE nutrient recovery in milk of late-lactation dairy cows
Temperature can influence the HE nutrient recovery in late lactation milk of dairy cows. In this study, 48 Holstein cows were used in the experiment. The cows were randomly allocated into 12 blocks, with each block receiving 40, 60, or 80 mg of 3NOP. The data were analyzed using the MIXED procedure of SAS.
The analyzed basal diet of 3NOP-treated cows resulted in a decrease in hydrogen emissions of up to 20 percent, 25 percent, and 29%, respectively. However, during the dry period, methane emission decreased, which resulted in a recovery of body weight from the dry period. These findings are consistent with previous studies, which show that reduced temperatures improve milk lactose and protein synthesis.
Although the rations were high in K, calcium and phosphorus, the ratio of DCAB to tetany were not in the recommended range. The calcium-phosphorus ratios were within the recommended range. In contrast, DCAB ratios were in the range of 316 to 518. Hence, the effects of temperature on HE nutrient recovery in milk of late lactation dairy cows are not as extreme as that of their HE nutrient content.
During winter 2001/2002, the herds experienced an increased rate of downer cows. The cows were in late pregnancy and early lactation, and showed tetany-like symptoms that required large doses of treatment. These cows became less milk-producing and their feed efficiency declined. However, they exhibited little or no fat content. The protein yield was increased by three-fold.
Cost of pasteurizing HE nutrient recovery in milk of late-lactation dairy cows
HE nutrient recovery in late-lactation dairy cow milk is an important consideration for cheese production, but is it worth the extra costs? The answer depends on the breed of dairy cows, herd productivity, and daily production. The average yield of milk per cow is approximately 200-225 kg. However, some producers report that HE nutrient recovery is not worth the additional costs.
During the early lactation period, a dairy cow can mobilize its body fats. The latter mobilizes fat for a longer period of time, while the former loses weight. At least 80% of dairy cows experience NEB, a period during which body fat is mobilized for energy. HE nutrient recovery in milk of late-lactation dairy cows is essential to ensure optimal health and reproduction.
HE nutrient recovery in milk of early-lactation dairy cows is more than just an economic consideration. The process can increase the yield of milk, while decreasing the cost of production. It also helps improve milk quality by reducing protein and fat. Furthermore, HE nutrient recovery in late-lactation dairy cow milk has been proven to be effective.