Responses to dietary starch or sucrose on protein and glucose kinetics in goats fed a high-concentrate diet.
Responses of whole body protein synthesis (WBPS) and glucose irreversible loss rate (ILR) were compared between dietary starch and sucrose in four male goats. Diets were fed at 1.2 times maintenance requirements of ME and CP with 30% of the ME as starch, starch plus sucrose or sucrose, twice daily. The diets consisted of 33, 32, 11 and 24% of alfalfa hay, corn, soybean meal and the carbohydrates, respectively. The WBPS and glucose ILR during 5-7 h after feeding were determined by an isotope dilution method of [2H5]phenylalanine, [2H2]tyrosine, [2H4]tyrosine and [13C6]glucose. Sucrose elevated ammonia nitrogen and lowered acetate concentrations in the rumen, but did not differ from starch in nitrogen retention. Glucose ILR and WBPS were similar between the carbohydrates. It was concluded that dietary sucrose would have effects similar to starch on WBPS and glucose kinetics in the absorptive state in goats fed a high-concentrate diet.
Fujita
Tadahisa
T
Faculty of Agriculture, Iwate University, Morioka, Japan.
Kajita
Masahiro
M
Sano
Hiroaki
H
D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D002247:Carbon Isotopes; D003903:Deuterium; D004040:Dietary Carbohydrates / Q000494:pharmacology; D004044:Dietary Proteins / Q000378:metabolism; D019422:Dietary Sucrose / Q000494:pharmacology*; D019587:Dietary Supplements; D002149:Energy Intake / Q000502:physiology; D004734:Energy Metabolism; D005947:Glucose / Q000493:pharmacokinetics*; D006041:Goats / Q000378:metabolism*; D008297:Male; D009751:Nutritional Requirements; D014176:Protein Biosynthesis / Q000187:drug effects; D011506:Proteins / Q000378:metabolism*; D013213:Starch / Q000494:pharmacology*
D002247:Carbon Isotopes; D004040:Dietary Carbohydrates; D004044:Dietary Proteins; D019422:Dietary Sucrose; D011506:Proteins; D013213:Starch; D003903:Deuterium; D005947:Glucose