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. 2010. Effects of corn-, wheator triticale dry distillers' grains with solubles on in vitro fermentation, growth performance and carcass traits of lambs. Can. J. Anim. Sci. 90: 99Á108. The objective of this study was to determine the effect of replacing a mixture of canola meal and barley grain with corn-, wheat-or triticale dry distillers' grains with solubles (DDGS) at 20% of dietary dry matter (DM) on in vitro ruminal fermentation in bovine ruminal fluid and on growth performance and carcass characteristics of lambs. Sixty ram lambs (22.693.0 kg) were randomly assigned to one of four dietary treatments and given individual ad libitum access to feed until they attained slaughter weight. The control diet consisted (DM basis) of 54% barley grain, 16% sunflower hulls, 11.5% beet pulp, 10% canola meal, 2.5% canola oil and 6.0% molasses, vitamins and minerals mixture. For the three DDGS dietary treatments, 10% barley grain and 10% canola meal were replaced with 20% corn-, wheat-or triticale-DDGS. The source of DDGS did not influence (P0.51) dry matter intake (DMI) or average daily gain (ADG). Feed conversion (feed:gain) of lambs fed wheat DDGS was approx. 12% poorer (PB0.05) than that of lambs fed control or corn DDGS diets. In vitro data suggest that the inefficient gain may have been attributable to greater (PB0.05) ammonia concentration at 24 h and lower digestibility of wheat DDGS. Carcass traits, including hot carcass weight, body wall thickness and saleable meat yield, were not affected (P0.60) by dietary treatment. Total saturated, monounsaturated and polyunsaturated fatty acids in subcutaneous fat were also not affected by DGGS source (P]0.13). There was no treatment effect (P 00.33) on concentrations of t11-18:1, but feeding triticale DDGS increased the concentration (P00.04) of c9, t11-conjugated linoleic acid (CLA). In conclusion, DDGS from corn, wheat or triticale can replace a mixture of barley grain and canola meal at 20% of dietary DM without adversely affecting DMI, ADG or carcass characteristics of growing lambs, although wheat DDGS may reduce feed conversion ratio (feed:gain). Including triticale DDGS may also improve the fatty acid profile of subcutaneous fat.Key words: Lamb, corn, wheat, triticale, distillers' grains, performance, carcass characteristics McKeown, L. E., Chaves, A. V., Oba, M., Dugan, M. E. R., Okine, E. et McAllister, T. A. 2010. Incidence des dre`ches se`ches de distillerie de maı¨s, de ble´ou de triticale enrichies de re´sidus solubles sur la fermentation in vitro, sur la croissance et sur les parame`tres de la carcasse des agneaux. Can. J. Anim. Sci. 90: 99Á108. L'e´tude devait e´tablir comment la fermentation in vitro dans le fluide du rumen des bovins, la croissance et les parame`tres de la carcasse des agneaux seraient affecte´s si on remplac¸ait un jusqu'a`20 % de la matie`re se`che (MS) d'une ration de tourteau de canola et d'orge par des dre`ches se`ches de distillerie de maı¨s, de ble´ou de triticale enrichies de re´sidus solubles (DDS). Pour cela, 60 agneaux maˆles (...

Objectives were to identify the phenotypic and genetic relationships and heritability (h2) of feeding behaviours in replacement beef females. Between 2005 and 2017, heifers (N = 1394) were tested for feed intake using an electronic feed bunk system. Feeding behaviours (FB) were: DUR, min d-1, HD, min d-1, FREQ, events d-1, TTB, min; DMI, kg d-1 and RFIFAT were also reported. Heritability estimates for DUR, HD, FREQ, TTB, DMI, and RFI FAT were 0.25 ± 0.05, 0.26 ± 0.06, 0.27 ± 0.05, 0.29 ± 0.06, 0.26 ± 0.05, and 0.40 ± 0.07, respectively. These are the first h2 to be presented for these FB among developing replacement heifers on a high-forage diet.

. 2010. Effects of replacing barley grain with triticale-based dried distillers' grains with solubles on nutrient digestibility, lamb growth performance and carcass traits. Can. J. Anim. Sci. 90: 87Á98. The objective of this research was to determine the effects of increasing proportions of triticale-based dried distillers' grains with solubles (TDDGS) in the diet on nutrient digestibility, growth and carcass traits of lambs. The control diet contained 72.5% barley grain, 10.0% beet pulp, 9.0% sunflower hulls, 3.0% alfalfa meal and 5.5% mixed supplement, which contained molasses, calcium carbonate, minerals and vitamins. Treatment diets contained TDDGS in place of barley grain at 20, 40 or 60% of diet dry matter (DM). In a growth study, 60 weaned lambs stratified by live weight (26.693.6 kg) were fed one of the four diets to slaughter weight. Additionally, a digestibility study using these diets in a replicated 4 )4 Latin square design was conducted using 12 ram lambs. Increasing dietary allocation of TDDGS in the diet did not affect (P 0.12) DM intake, average daily gain or feed efficiency (feed:gain). At slaughter, cold carcass weight and grade rule scores responded quadratically (P00.04) to increasing TDDGS in the diets. Feeding TDDGS did not affect other carcass traits (P0.22). Total saturated fatty acids and monounsaturated fatty acids in subcutaneous fat were unaffected by TDDGS, whereas polyunsaturated fatty acids increased linearly (P00.03). Concentration of t10, c12-conjugated linoleic acid (CLA) in carcass fat increased linearly (P00.02) with increasing TDDGS, but there was no effect (P]0.20) on concentrations of c9, t11-CLA or t11-18:1. In the digestibility study, DM intake increased linearly (PB0.01) with increasing TDDGS in the diet, whereas digestibility of DM, crude protein and fat responded quadratically (PB0.01). Starch digestibility decreased and ADF digestibility increased linearly (PB0.01), but there was no treatment effect on NDF digestibility (P0.29). Total nitrogen, total phosphorus and soluble phosphorus excretion increased (PB0.01) with increasing TDDGS. In conclusion, TDDGS can be fed in place of barley grain at levels up to 60% in diets for lambs without adverse affects on growth performance or carcass traits, but this practice will lead to an increase in N and P excretion into the environment.Key words: Lamb, digestibility, triticale distillers grains, performance, carcass characteristics McKeown, L. E., Chaves, A. V., Oba, M., Dugan, M. E. R., Okine, E. et McAllister, T. A. 2010. Substitution de l'orge par des dre`ches se`ches de distillerie de triticale enrichies de re´sidus solubles et incidence sur la digestibilite´des e´le´ments nutritifs, sur la croissance des agneaux et sur les parame`tres de la carcasse. Can. J. Anim. Sci. 90: 87Á98. La recherche devait pre´ciser les conse´quences d'une hausse de la proportion de dre`ches se`ches de distillerie de triticale avec re´sidus solubles (DDST) dans la ration sur la digestibilite´des e´le´ments nutritifs, la croissance et les parame`t...

Corn- and triticale- DDGS diets exhibited fermentation characteristics similar to the barley based control diet, consistent with in vivo findings that these diets yielded no adverse effects on production. In vitro ruminal fermentation of wheat DDGS diet differed significantly from control in several aspects including 2.6 to 6X higher ammonia concentrations.