The HM cows had the highest yield of milk, fat, protein, and lactose, whereas the MM cows had the highest milk fat, protein, and lactose concentrations.
Efficiency of milk production (energy-corrected milk yield per unit of dry matter intake) was higher for the urea and yeast treatments compared with control because of slightly higher yield of milk fat and energy-corrected milk.
Compared with conventional rendering, the centrifugal methods provide a higher yield of better-quality fat, and the separated protein has potential as an edible meat product.
No differences were observed in DMI, milk yield, or concentration of fat, lactose, or nonfat solids, but cows fed supplemental LYS + had a greater concentration of milk protein and tended to have higher yields of milk fat, protein, and energy-corrected milk (ECM) than cows fed CONT.
Cows fed DFMt had higher yields of milk, fat-corrected milk, energy-corrected milk, milk fat, and milk protein during the second week of lactation than CON; however, we found no differences between treatments on milk yield and milk components overall.
The milk yield was 8.5 kg/d higher and yields of fat, protein, and lactose were 180, 350, and 403 g/d higher, respectively, in the HCLF versus LCHF diet.
RNASE5 may play a role in regulating lactation in the mammary gland similar to its mechanism in angiogenesis, i.e. it may be associated with the proliferation of mammary secretory cells, leading to higher volumes of milk, and higher yields of protein and fat.
Cows that were fed the total mixed rations containing Novartis NX3018 corn silage produced higher yields of milk, 3.5% fat-corrected milk (FCM), milk crude protein, and milk lactose compared to cows that were fed the TMR containing Novartis N29-F1 corn silage.
The 20% SFC substitution improved digestion of crude protein, yield of fat-corrected milk, milk lactose content, fat, and fat yield.
Milk fat concentration tended to be higher for cows fed AS, but the milk true protein concentration and yields of fat and protein did not differ by treatment.
