Abstract
The objective of this study was to determine effect of different rumen undegraded protein level on feed consumption, nutrient digestion, body weight and body condition score in early lactating dairy cattle. Ten Friesian Holstein cows were divided into two groups (five animals were used as control and another group as treatment object). Diets were forages and concentrates with ratio of 60:40, DM basis. The cows feed after parturition until 100 days of lactation. The control group concentrate diets containing Crude Protein (CP) 18.55%, Total Digestible Nutrient (TDN) 56.94% and Rumen Undegraded Protein (RUP) 5.10 CP%, while the treatment group concentrate diets containing Crude Protein (CP) 18.83%, Total Digestible Nutrient (TDN) 58,91% and Rumen Undegraded Protein (RUP) 6.17 CP%. Drinking water was given by ad libitum. The comparison results between the two conditions (control and treatment) were tested using independent t-test analysis. Results indicated that nutrient intake and digestion (dry matter, organic matter, crude protein, crude fibre and ether extract), body weight and body condition score were not significant. The conclusion is supplementation with different rumen undegraded protein level on early lactating dairy cattle could not increase feed consumption, nutrient digestion, body weight and body condition score.
Highlights
The first lactation period which is the first quarter of lactation, called the first 100 days of lactation, were critical period on dairy cow performances for those with high milk production
Microbial protein synthesized in the rumen supplies amino acids to the ruminant in sufficient quantities to support a moderate level of productivity (McAllister et al, 1992)
Drackley et al (2001), added that the contribution of Amino Acid (AA) to gluconeogenesis has been considered important during early lactation in the dairy cow, but supportive evidence has come from observations either in vivo or in vitro
Summary
The first lactation period which is the first quarter of lactation, called the first 100 days of lactation, were critical period on dairy cow performances for those with high milk production. The high milk production dairy cow needs an adequate nutrient, especially protein. Drackley et al (2001), added that the contribution of Amino Acid (AA) to gluconeogenesis has been considered important during early lactation in the dairy cow, but supportive evidence has come from observations either in vivo or in vitro. Doepel et al (2009), added that the other important demand for AA is to support milk protein synthesis and this requirement increases greatly at the onset of lactation. NRC (2001) explains that to ameliorate this nutrient deficiency, body fat and protein reserves are mobilized to support the energy requirements for high milk production in early lactation. Body fat deposits are recognized as the major source of energy reserves, the catabolism of both body fat and protein contribute to nutrient requirements at early lactation
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