Responses to abomasal infusions of casein plus methionine in lactating ewes fed fresh pasture
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چکیده
منابع مشابه
The nitrogen and energy metabolism of lactating cows given abomasal infusions of casein.
1. Four cows in early lactation were given continuous infusion into the abomasum of 0, 200, 400 or 600 g lactic casein/d according to a Latin-square design. Each period was of 14 d and the Latin square was followed by 7 d in which an infusion of 800 g glucose/d was given. The basal diet was given at a level which provided sufficient nitrogen and energy for 10 kg milk yield/d. 2. Infusion of cas...
متن کاملResponses to postruminal infusions of graded levels of casein in lactating goats.
1. A study was made in goats of the response in terms of milk production, nitrogen utilization, plasma amino acids and amino acid uptake by the mammary gland, to postruminal infusion of casein. Goats in early lactation, housed in metabolism cages, were fed on 2-5 kg basal ration/d (containing 111 g crude protein (N X 6-25)/kg) and were given, by infusion into the abomasum, 0, 15, 30 or 45 g cas...
متن کاملProgesterone plus PMSG Priming in seasonally anovulatory lactating Sarda ewes exposed to the ram effect.
The aim of this trial was to evaluate the effectiveness (fertility and lambing) of priming with a single injection of progesterone plus PMSG in anovulatory lactating Sarda ewes subjected to the ram effect (RE) in spring. Thirty ewes (P4 group) were i.m. injected with 30 mg progesterone and 500 IU PMSG 36 h before ram introduction (d 0). This treatment was compared to a 12-day treatment with flu...
متن کاملeffects abomasal infusion of starch or cottonseed oil with casein on performance of lactating sannen goats
three multiparoys lactating sannen dairy goats in midlactation with mean milk production and dim pf 1.5 ±0.22 kg and 167±4 days were used to determine effects of the abomasal infusion wheat starch, wheat starch or cottonseed oil with casein on performance of sannen dairy goats. goats were fed ad libitum with basal diet include, 40% hay alfalfa and 60% concentrate. treatments were abomasal infus...
متن کاملVascular sources of phenylalanine, tyrosine, lysine, and methionine for casein synthesis in lactating goats.
The contribution to casein biosynthesis of peptides derived from blood was examined in late lactation goats (254 to 295 d in milk). Ratios of mammary uptake of free amino acids (AA) in blood to output of AA in milk protein and ratios of the enrichments of Phe, Tyr, Met, and Lys at isotopic plateau in secreted milk casein to the free AA in arterial and mammary vein blood were monitored during th...
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ژورنال
عنوان ژورنال: New Zealand Journal of Agricultural Research
سال: 1980
ISSN: 0028-8233,1175-8775
DOI: 10.1080/00288233.1980.10417865