scholarly journals Hydroxychloride trace minerals improve apparent total tract nutrient digestibility in Bonsmara beef cattle

2022 ◽  
pp. 104820
Author(s):  
Sandra van Kuijk ◽  
Piet Swiegers ◽  
Yanming Han
2020 ◽  
Vol 98 (5) ◽  
Author(s):  
Rodrigo S Goulart ◽  
Ricardo A M Vieira ◽  
Joao L P Daniel ◽  
Rafael C Amaral ◽  
Vanessa P Santos ◽  
...  

Abstract The objectives of this research were to evaluate the effects of source and concentration of α-amylase-treated neutral detergent fiber (aNDF) from roughage on feed intake, ingestive behavior, and ruminal kinetics in beef cattle receiving high-concentrate diets. Six ruminally cannulated Nellore steers (408 ± 12 kg of body weight) were randomly assigned to a 6 × 6 Latin square design with six diets: 10% aNDF from corn silage (10CS); 20% aNDF from corn silage (20CS); or four diets containing 10% aNDF from corn silage and 10% aNDF from one of the following sources: sugarcane (SC), sugarcane bagasse (SCB), soybean hulls (SH), or low oil cottonseed hulls (LOCH). The parameters of passage and degradation kinetics were estimated based on a two-compartmental model with gamma- and exponential-distributed residence times. The nonlinear models were fitted by nonlinear least squares, and a linear mixed-effects model was fitted to all variables measured from the Latin square design that were related to intake, digestibility, digestion kinetic parameters, and residence times. Mean particle size (MPS) between roughage sources (CS, SCB, and SC) and coproducts (SH and LOCH) was affected (P < 0.05). Dry matter intake (DMI) was not affected (P > 0.05) by 20CS, SC, SH, or LOCH. Steers fed 20CS or LOCH diets had 16% and 20% greater DMI, respectively, (P < 0.05) than steers fed 10CS diet. Steers fed SCB consumed the least dry matter (DM). The SH and LOCH diets had lower MPS values (about 8.77 mm) in comparison to 20CS, SCB, and SC diets (about 13.08 mm) and, consequently, affected (P < 0.05) rumen content, ruminal in situ disappearance, nutrient digestibility, and solid fractional passage rate. Chewing time was affected (P < 0.05) by roughage sources and concentration. Lower values of distance travel inside the rumen (min/cm) were observed (P < 0.05) for the SCB and SC diets in comparison with any other diet. Except for SCB, there was no difference (P > 0.05) in rumen fill, among other treatments. Mean daily ruminal pH was not affected (P > 0.05) by 20CS, SCB, SC, and LOCH diets, and it ranged from 6.1 to 6.23. Total short-chain fatty acids concentration was affected (P < 0.05) by roughage source and concentration. Based on our results, we recommend that under Brazilian finishing diets, replacing roughage sources, except for SCB, based on aNDF concentration of the roughage in high-concentrate diets containing finely ground flint corn does not affect DMI.


animal ◽  
2014 ◽  
Vol 8 (11) ◽  
pp. 1807-1815 ◽  
Author(s):  
D. Vyas ◽  
E.J. McGeough ◽  
R. Mohammed ◽  
S.M. McGinn ◽  
T.A. McAllister ◽  
...  

2020 ◽  
Vol 98 (8) ◽  
Author(s):  
Darren D Henry ◽  
Francine M Ciriaco ◽  
Rafael C Araujo ◽  
Pedro L P Fontes ◽  
Nicola Oosthuizen ◽  
...  

Abstract Two randomized block designs were performed to evaluate the effects of bismuth subsalicylate (BSS) and encapsulated calcium-ammonium nitrate (eCAN) on enteric methane production, nutrient digestibility, liver mineral concentration, and performance of beef cattle consuming bahiagrass hay (Paspalum notatum; ad libitum) and sugar cane molasses [1.07 kg/d; dry matter basis]. Experiment 1, used 25 crossbred steers [335 ± 46 kg of initial body weight (BW)] with a 2 × 2 + 1 factorial arrangement of treatments for two 20 d periods. Factors were nonprotein nitrogen (NPN) source (350 mg/kg BW of nitrate or 182 mg/kg BW of urea), BSS (0 or 58.4 mg/kg BW), and a negative control (NCTRL; bahiagrass hay and molasses only). Steers were re-randomized for a second period (n = 10/treatment total). Intake, apparent total tract digestibility and enteric methane were evaluated. Experiment 2 used 75 crossbred heifers in 25 pens (3 heifers/pen; 279 ± 57 kg of initial BW), consuming the same diet and treatments as experiment 1, to determine liver mineral concentration and growth performance over 56 d. Orthogonal contrasts were used to evaluate the effects of NPN (NCTRL vs. others), source of NPN (NS; urea vs. eCAN), BSS, and NS × BSS. For experiment 1, no interactions were observed for any variables, nor were there any effects of NPN on total tract digestibility of nutrients, except for crude protein. Digestibility of all nutrients was reduced (P ≤ 0.021) for steers consuming eCAN compared with urea. There was no effect (P > 0.155) of BSS on digestibility of nutrients; however, BSS reduced (P = 0.003) apparent S retention. Enteric CH4 emission (g/kg BW0.75) was decreased (P = 0.051) by 11% with the addition of eCAN compared with urea. For experiment 2, no NS × BSS interactions (P ≥ 0.251) were observed to affect liver mineral concentration; however, the addition of BSS decreased liver concentration of Cu (P = 0.002) while increasing Fe concentration (P = 0.016). There was an NS × BSS interaction (P = 0.048) where heifers consuming eCAN and BSS had lesser final BW compared with heifers consuming urea and BSS. While eCAN may be a viable resource for mitigating enteric CH4 production of forage-fed cattle, the negative effects on digestibility should be considered. Furthermore, BSS, at the amount provided, appears to have no negative effects on digestibility of nutrients in forage-fed cattle; however, there may be deleterious impacts on performance depending upon what nitrogen source is supplied.


Author(s):  
Wantanee Polviset ◽  
Nattiya Prakobsaeng

This experiment was conducted to investigate the effect of palm oil and sunflower oil supplementations on digestibility and blood metabolites in crossbred Thai native x brahman bulls fed on TMR used rice straw as a roughage source. Four, 2 year old crossbred Thai native x Brahman bulls were randomly assigned in a 2x2 factorial in 4 x 4 latin square design. Each period of feeding lasted for 21 days to receive four dietary treatments; 3% palm oil, 6% palm oil, 3% sunflower oil and 6% sunflower oil. All animals were fed with TMR ad-libitum. It was found that supplementation of palm oil and sunflower oil had no effect on digestibility of dry matter (DM), organic matter (OM), neutral detergent fiber (NDF) and crude protein (CP). Supplementation resulted in significant (P<0.05) lower acid detergent fiber (ADF) digestibility when feeding with palm oil on the other hand feeding beef cattle with 6% from palm oil and sunflower oil were higher Ether extract (EE) digestibility than 3% from twice oils (P<0.05). Blood glucose, blood urea nitrogen, cholesterol, triglyceride, high density lipoprotein and low density lipoprotein were not significant different among treatments. Based on this study, supplementing TMR sunflower oil in diets was suitable in beef cattle without any effect ruminal digestibility and blood metabolites.


2017 ◽  
Vol 95 (suppl_2) ◽  
pp. 165-165
Author(s):  
F. H. Hilscher ◽  
M. J. Jolly-Briethaupt ◽  
J. L. Gramkow ◽  
M. M. Norman ◽  
J. N. Anderson ◽  
...  

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