Abstract Lysine may be limiting for cattle fed diets based on corn products. Our objective was to supplement ruminally protected lysine limit-fed a corn-based diet during the growing phase and assess performance subsequent finishing phases. The 77-d growth trial used 338 crossbred steers allocated 32 pens 2.4% of body weight daily. Steers were implanted (40 mg trenbolone acetate, 8 estradiol) a...

The objective of the present study was to evaluate effect feeding rumen-protected methionine (RPM) during peripartal period and early lactation on mRNA gene expression profiles uterine cytological smear endometrial samples Holstein cows (n = 20). Treatments consisted a supplementation with RPM [MET; n 11; at rate 0.08 % DM: Lys:Met 2.8:1, (Smartamine® M Adisseo, Alpharetta, GA, USA)] no (CON; 9...

Abstract Previous evidence has suggested that fertilization and preimplantation embryonic development are sensitive periods can be influenced by changes in maternal nutrition. We hypothesized feeding rumen-protected methionine (RP-Met) during the periconceptional period will program bovine gestation a manner enhances fetal postnatal growth. A total of 114 cows were fed roughage-based diet rando...

Microspheres consisting of a central core of amino acid and binding agents which are coated with a pH sensitive (neutral stable/acid unstable) polymer have been developed by Rhone Poulenc. This new technology allows orally administered amino acids to avoid exposure to and degradation by, rumen microbes but allows bio-availability following release and absorption at the abomasum and distal gut s...

Objectives of this study were to quantify production responses of lactating dairy cows to supplying absorbable Met as isopropyl-2-hydroxy-4-(methylthio)-butanoic acid (HMBi), or rumen-protected Met (RPM, Smartamine M; Adisseo, Alpharetta, GA) fed with or without 2-hydroxy-4-(methylthio)-butanoic acid (HMB), and to determine whether Met supplementation will allow the feeding of reduced dietary c...