1. Sixteen first-calf Friesian heifers were used in a continous treatment design experiment. For 2 weeks after calving they were given a 750 g concentrate, 250 g hay/kg ration with 169 g crude protein (nitrogen X 6.25; CP)/kg dry matter (DM). They were then divided into two groups of eight and given a high-protein (223 g CP/kg DM) or low-protein (107 g CP/kg DM) ration at the rate of 10.8 kg co...

Introduction. The main criterion for the state of water in food is indicator "water activity" (Aw), which affects their quality and shelf life. Problem. At present, it advisable to propose such changes recipe technology canned milk, would reduce rate increase osmotic pressure. aim work scientific substantiation factors milk preservation. Methods. Objects research – low-fat condensed low-lactose...

The use of additives in ruminant diets has occurred more intensely recent years to increase animalperformance, through changes the ruminal microbiota. Thus, this study aimed evaluate: 1) Isomix (Iso)and virginiamycin (Vir) concentrate, a 2x2 factorial (without and with 30 g Isomix/cow/day; without 210mg virginiamycin/cow/day), on productive performance mixed cows pasture; 2) multiplesupplement ...

It is well-established that altering the proportion of starch and fibre in ruminant diets can alter ruminal and post-ruminal digestion, although quantitative evidence that this reduces enteric methane (CH4) production in dairy cattle is lacking. The objective of this study was to examine the effect of varying grass-to-maize silage ratio (70 : 30 and 30 : 70 DM basis), offered ad libitum, with e...

The technofunctional properties of milk protein concentrate containing 80% (MPC80) with different calcium contents, i.e., MPCF1, MPCF2 and MPCF3 contained 1.57%, 1.00% 0.36% calcium, respectively, were studied. MPC samples reduced produced using partial acidification followed by a cation exchange process thereby replacing sodium in an MPC80 concentrate. Scanning electron microscopy analysis pow...

the present study was conducted to evaluate the effects of extruded linseed on milk production,dry matter intake and reproduction performance of 300 holstein lactating cows (35±15 days in milk;41±9/8 kg/day of milk production). cows were placed in a completely randomized design of 2treatments (concentrate containing 7 percent of extruded linseed vs. control), (150 cows pertreatment). cows were ...

Metabolism in the mammary gland was related to changes in milk output in response to changes in dietary protein intake. Three diets of grass silage and concentrate were fed to four lactating dairy cows equipped with intravascular catheters across the mammary gland. Concentrates differed in the inclusion of protected soybean meal and provided 11.3, 15.4, and 20.1% CP, respectively. Blood samples...

Twenty-four lactating Holstein dairy cows were used in a completely randomized design to investigate the effect of soybean meal (SM) and xylose protected soybean meal (XSM) in combination with ground (GB) or steam flaked (FB) barley on dry matter intake, milk production, rumen fermentation and blood responses. The experimental period lasted for 30 days. The diets consisted of the provision of 1...

The physicochemical changes during the storage of high protein powders, such as skim milk powder (SMP), nonfat dry (NDM), and concentrates (MPC), can result in a variation functional properties powders. objective this study was to evaluate effects various powders (SMP, NDM, MPC40, MPC70) on their properties. Three different lots were collected from US manufacturers analyzed for after 3, 9, 15 m...

The aims of this study were to determine the effects of feeding medium-roasted soybean meal (SBM) and corn dried distiller's grains with solubles (CDDGS) in dairy cows on milk production and income over feed costs. A randomized complete block design experiment was conducted with 24 crossbred multiparous Holstein Friesian dairy cows in early- and mid-lactation. Four dietary treatments were as fo...