The effect of supplemental protein source on ammonia levels in rumen fluid and blood and intake of alfalfa silage by beef cattle

1992 ◽  
Vol 72 (4) ◽  
pp. 853-862 ◽  
Author(s):  
J. W. G. Nicholson ◽  
E. Charmley ◽  
R. S. Bush
Keyword(s):  
Beef Cattle ◽  
Soybean Meal ◽  
Feed Intake ◽  
Dry Matter ◽  
Rumen Fluid ◽  
The Other ◽  
Feed Conversion ◽  
Eating Pattern ◽  
Physiological Limits ◽  
Alfalfa Silage

Growing beef cattle fed legume silage were supplemented with urea, soybean meal, fishmeal or a barley-based control in two experiments. In the first experiment, the concentrates were fed before the silage and in the second the silage and concentrates were mixed at feeding. In exp. 1 there were no significant (P > 0.05) effects of CP supplement on feed intake, weight gains or feed efficiency, although animals fed fishmeal gained the most and those fed urea the least. Rumen fluid ammonia N (RFNH3-N) increased more after feeding urea and soybean meal than the control or fishmeal supplements. Blood urea N (BUN) levels changed in parallel with RFNH3-N levels but the magnitude of change was reduced to about half. Blood ammonia N (BNH3-N) levels showed statistically significant changes only with the urea supplement. Cattle fed urea took longer to consume their supplement than those fed the other supplements. In exp. 2 there was no effect of supplement on gains or feed conversion. Animals fed the control supplement consumed more dry matter than those fed fishmeal (P < 0.05). Cattle fed the control supplement had lower RFNH3-N and BUN than those fed the other supplements (P < 0.01) but differences among the sources of CP were small. The urea supplement resulted in a higher BNH3-N than the control or fishmeal supplements (P < 0.05). There was no apparent effect of treatment on blood glucose level in either experiment. It was concluded that cattle adjust their daily eating pattern to maintain BNH3-N levels within physiological limits; that intake of silage dry matter is limited by level of non-protein N and rumen degradable protein; and that provision of bypass protein can improve efficiency of feed conversion of high-silage diets even when depressing feed intake. Key words: Alfalfa, silage, protein supplement, nitrogen, intake

Whole-tract dry matter and nitrogen digestibility of lactating dairy cows selected for phenotypic divergence in residual feed intake

2014 ◽  
Vol 54 (9) ◽  
pp. 1460 ◽  
Author(s):  
J. B. Thornhill ◽  
L. C. Marett ◽  
M. J. Auldist ◽  
J. S. Greenwood ◽  
J. E. Pryce ◽  
...  
Keyword(s):  
Dairy Cows ◽  
Feed Intake ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Residual Feed Intake ◽  
Feed Conversion ◽  
Lactating Cows ◽  
Phenotypic Divergence ◽  
Holstein Friesian ◽  
Acid Detergent Fibre

The objective of this experiment was to compare the whole-tract digestibility of dry matter (DM) and nitrogen (N) in Holstein-Friesian dairy cows selected for divergent feed conversion efficiency. The experiment used 16 primiparous Holstein–Friesian dairy cows selected based on their residual feed intake (RFI) measured as growing calves. The cows were housed in individual metabolism stalls and fed lucerne cubes ad libitum plus 6 kg DM per day of crushed wheat grain. Feed intake, milk yield, faecal and urine output were measured for 5 days. Rumen fluid was collected per os from each cow on one occasion. Milk production parameters and intakes of DM, organic matter, neutral detergent fibre, acid detergent fibre and N did not differ between RFI groups. Apparent whole-tract DM digestibility and N digestibility did not differ between RFI treatment groups. Rumen metabolites were also unaffected by RFI. In conclusion, divergence in RFI as calves was not associated with differences in whole-tract DM or N digestibility in lactating cows. Therefore, emphasis on selection for phenotypic divergence in RFI may not contribute to improved utilisation of consumed nutrients in Australian Holstein-Friesian dairy cows.

Daily methane emissions and emission intensity of grazing beef cattle genetically divergent for residual feed intake

2017 ◽  
Vol 57 (4) ◽  
pp. 627 ◽  
Author(s):  
J. I. Velazco ◽  
R. M. Herd ◽  
D. J. Cottle ◽  
R. S. Hegarty
Keyword(s):  
Feed Intake ◽  
Emission Intensity ◽  
Dry Matter ◽  
Average Daily Gain ◽  
Residual Feed Intake ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Breeding Value ◽  
Dry Matter Intake ◽  
Feed Conversion

As daily methane production (DMP; g CH4/day) is strongly correlated with dry matter intake (DMI), the breeding of cattle that require less feed to achieve a desired rate of average daily gain (ADG) by selection for a low residual feed intake (RFI) can be expected to reduce DMP and also emission intensity (EI; g CH4/kg ADG). An experiment was conducted to compare DMP and EI of Angus cattle genetically divergent for RFI and 400-day weight (400dWT). In a 6-week grazing study, 64 yearling-age cattle (30 steers, 34 heifers) were grazed on temperate pastures, with heifers and steers grazing separate paddocks. Liveweight (LW) was monitored weekly and DMP of individual cattle was measured by a GreenFeed emission monitoring unit in each paddock. Thirty-nine of the possible 64 animals had emission data recorded for 15 or more days, and only data for these animals were analysed. For these cattle, regression against their mid-parent estimated breeding value (EBV) for post-weaning RFI (RFI-EBV) showed that a lower RFI-EBV was associated with higher LW at the start of experiment. Predicted dry matter intake (pDMI), predicted DMP (pDMP) and measured DMP (mDMP) were all negatively correlated with RFI-EBV (P < 0.05), whereas ADG, EI, predicted CH4 yield (pMY; g CH4/kg DMI) were not correlated with RFI-EBV (P > 0.1). Daily CH4 production was positively correlated with animal LW and ADG (P < 0.05). The associations between ADG and its dependent traits EI and pMY and predicted feed conversion ratio (kg pDMI/kg ADG) were strongly negative (r = –0.82, –0.57 and –0.85, P < 0.001) implying that faster daily growth by cattle was accompanied by lower EI, MY and feed conversion ratio. These results show that cattle genetically divergent for RFI do not necessarily differ in ADG, EI or pMY on pasture and that, if heavier, cattle with lower RFI-EBV can actually have higher DMP while grazing moderate quality pastures.

scholarly journals Feed Efficiency Can Be Sustained in Pigs Fed with Locally Produced Narbon Vetch (Vicia narbonensis L.)

2020 ◽  
Vol 12 (10) ◽  
pp. 3993
Author(s):  
Emilio Gómez Izquierdo ◽  
Luis Gomez-Raya ◽  
Eduardo de Mercado de la Peña ◽  
Juan José Ciruelos ◽  
Wendy M. Rauw
Keyword(s):  
Soybean Meal ◽  
Feed Intake ◽  
Feed Efficiency ◽  
Body Weight Gain ◽  
Soil Conditions ◽  
Feed Conversion ◽  
Economic Implications ◽  
Livestock Feeds ◽  
Daily Body Weight ◽  
Feed Costs

There is an interest in replacing soybean meal with locally produced ingredients in livestock feeds. Narbon vetch is resistant to unfavorable climatic and soil conditions, common pests, and has a favorable nutritional profile. The effect of substitution of soybean meal with 0% (V0), 5% (V5), 10% (V10), and 20% (V20) inclusion of Narbon vetch on growth curve parameters, daily body weight gain (DBWG), daily feed intake (DFI), feed conversion efficiency (FCE), and residual feed intake (RFI) was investigated in 47 Duroc × Iberian barrows in 16 periods (a total of 125 d). DFI and DBWG were reduced (p < 0.05) up to four weeks after introduction of the novel feed in V20 and V10. Small, mostly nonsignificant differences existed between treatments in FCE and RFI. However, because of accumulative small differences in feed efficiency between the four diets, pigs in V0 reached the highest BW, and pigs in V20 reached the lowest BW on a similar feed intake. Economic implications of Narbon vetch inclusion depend on the extra amount of feed required and associated feed costs, and on the costs of additional days on-farm required to reach a given slaughter weight.

Replacing soybean meal with yeast-fermented cassava pulp (YFCP) on feed intake, nutrient digestibilities, rumen microorganism, fermentation, and N-balance in Thai native beef cattle

2020 ◽  
Vol 52 (4) ◽  
pp. 2035-2041 ◽  
Author(s):  
Sukruthai Sommai ◽  
Thiwakorn Ampapon ◽  
Chaowarit Mapato ◽  
Pajaree Totakul ◽  
Bounnaxay Viennasay ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Soybean Meal ◽  
Feed Intake ◽  
N Balance ◽  
Cassava Pulp ◽  
Rumen Microorganism

scholarly journals Effects of source and concentration of neutral detergent fiber from roughage in beef cattle diets on feed intake, ingestive behavior, and ruminal kinetics

2020 ◽  
Vol 98 (5) ◽  
Author(s):  
Rodrigo S Goulart ◽  
Ricardo A M Vieira ◽  
Joao L P Daniel ◽  
Rafael C Amaral ◽  
Vanessa P Santos ◽  
...  
Keyword(s):  
Beef Cattle ◽  
Feed Intake ◽  
Dry Matter ◽  
Latin Square ◽  
Nutrient Digestibility ◽  
Corn Silage ◽  
Neutral Detergent Fiber ◽  
Ingestive Behavior ◽  
Rumen Content ◽  
Residence Times

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 &lt; 0.05). Dry matter intake (DMI) was not affected (P &gt; 0.05) by 20CS, SC, SH, or LOCH. Steers fed 20CS or LOCH diets had 16% and 20% greater DMI, respectively, (P &lt; 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 &lt; 0.05) rumen content, ruminal in situ disappearance, nutrient digestibility, and solid fractional passage rate. Chewing time was affected (P &lt; 0.05) by roughage sources and concentration. Lower values of distance travel inside the rumen (min/cm) were observed (P &lt; 0.05) for the SCB and SC diets in comparison with any other diet. Except for SCB, there was no difference (P &gt; 0.05) in rumen fill, among other treatments. Mean daily ruminal pH was not affected (P &gt; 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 &lt; 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.

Substitution of sorghum grain for molasses increases the liveweight gain of steers given molasses-based diets

1998 ◽  
Vol 130 (2) ◽  
pp. 199-204 ◽  
Author(s):  
H. PEIRIS ◽  
R. ELLIOTT ◽  
B. W. NORTON
Keyword(s):  
Fatty Acid ◽  
Treatment Group ◽  
Feed Intake ◽  
Volatile Fatty Acid ◽  
Dry Matter ◽  
Rumen Fluid ◽  
Basal Diet ◽  
Feed Consumption ◽  
Sunflower Meal ◽  
Sorghum Grain

Sorghum grain was included in a basal diet of molasses (molasses 505, urea 21, sunflower meal 191, pangola grass hay 250, minerals 31 g/kg as fed) at rates of 0, 202, 391 and 707 g/kg, generating diets in which grain replaced 0 (diet A), 33 (diet B), 66 (diet C) and 100% (diet D) of the molasses and hay. The four diets were fed to groups of four Hereford steers (293–334 kg liveweight) over a 96-day period. One half of each treatment group was implanted with a growth promotant (zeranol), and all were slaughtered at a commercial abattoir at the end of the trial. The inclusion of 33% grain increased voluntary feed consumption, digestible dry matter (DM) intake (from 57·6 to 82·0 g digestible DM/kg0·75 per day and significantly increased liveweight gain from 592 to 900 g/day. Zeranol implantation also increased liveweight gain but not feed intake. Steers given only grain (diet D) had the highest liveweight gains (1127 g/day). The addition of grain to molasses diets decreased urinary N excretion and increased ammonia and volatile fatty acid (VFA) concentrations in rumen fluid. Molar proportions of propionic acid in total VFA increased from 0·15 to 0·20, and butyric acid decreased from 0·36 to 0·29 when 33% of the molasses was replaced by sorghum grain. The fat content (depth at sacral position) of the carcasses of steers given grain only (diet D) was significantly greater (14 mm) than that of steers given the basal diet of molasses (4 mm), and carcass fat contents were intermediate (10 and 11 mm) for steers given diets B and C respectively. It was concluded that the inclusion of small amounts of grain in molasses-based diets increased cattle growth principally by increasing digestible energy intake without decreasing molasses intake, thus improving the efficiency of utilization of molasses in molasses-based diets.

RESPONSE OF LACTATING DAIRY COWS TO FORMALDEHYDE-TREATED SOYBEAN MEAL WHEN FED WITH CONTROL OR UREA-TREATED CORN SILAGE

1986 ◽  
Vol 66 (1) ◽  
pp. 85-95 ◽  
Author(s):  
J. D. ERFLE ◽  
F. D. SAUER ◽  
S. MAHADEVAN ◽  
R. M. TEATHER
Keyword(s):  
Body Weight ◽  
Dairy Cows ◽  
Milk Production ◽  
Soybean Meal ◽  
Dry Matter ◽  
Milk Protein ◽  
Rumen Fluid ◽  
Amino Acid Content ◽  
Negative Control ◽  
Corn Silage

In two experiments, lactating cows (26 in exp. 1; 32 in exp. 2) were fed an 11.3% crude protein (CP) diet, a 14.7% CP diet containing untreated soybean meal (SBM) or a 14.6% CP diet containing formaldehyde-treated SBM (FSBM), all three fed as a complete blended diet with control corn silage (CCS) (exp. 1); a 12% CP diet, a 13.4% CP diet containing SBM or a 13.3% CP diet containing FSBM, all fed as a complete blended diet with urea-treated corn silage (UCS) (exp. 2). In both experiments concentrates and CCS or UCS were mixed (50:50 dry matter) daily and fed ad lib for a 16-wk period. The increase of CP over the low CP negative control by addition of untreated SBM resulted in a significant (P < 0.05) increase in milk production in both experiments. The addition of FSBM had no significant effect. When comparing solids-corrected milk (SCM), addition of SBM, whether treated or not, significantly increased SCM in both experiments. In neither experiment did FSBM improve milk production over untreated SBM. All animals fed CCS lost body weight but there was no difference between treatments. For animals fed UCS the low CP group lost significantly (P < 0.05) more body weight than did the group fed FSBM. Dry matter (DM) intake was significantly (P < 0.05) lower for the FSBM fed group than for the group fed untreated SBM in exp. 1 (CCS). DM intake was significantly (P < 0.05) increased by either FSBM or SBM over the low CP control fed UCS. Milk protein was the only component significantly (P < 0.05) decreased by FSBM in exp. 1. Isobutyric and isovaleric acids were significantly (P < 0.05) lower in rumen fluid of animals on FSBM plus CCS. Rumen microbial protein content seemed to be more adversely affected by FSBM with CCS than UCS. Amino acid content of FSBM and SBM demonstrated that lysine and tyrosine were lost from SBM after treatment with formaldehyde. The lack of a response in milk production to FSBM is discussed in terms of a lysine and tyrosine deficiency for milk protein synthesis and the adverse effect that formaldehyde protection of SBM may have on the rumen microbial population. Key words: Lactation, dairy cows, urea, corn silage, soybean meal, formaldehyde treatment

scholarly journals Sunflower cake in diets for beef cattle: digestibility, kinetics and in vitro ruminal fermentation parameters

2018 ◽  
Vol 41 (1) ◽  
pp. 39492 ◽  
Author(s):  
Rafael Henrique de Tonissi e Buschinelli de Goes ◽  
Luiz Henrique Xavier da Silva ◽  
Tatiana García Díaz ◽  
Antonio Ferriani Branco ◽  
Ana Lúcia Teodoro ◽  
...  
Keyword(s):  
Organic Matter ◽  
Beef Cattle ◽  
Soybean Meal ◽  
Crude Protein ◽  
Dry Matter ◽  
In Vitro Digestibility ◽  
Ruminal Fermentation ◽  
Fermentation Products ◽  
Sunflower Cake

 The objective of this study was to evaluate the effect of the inclusion of sunflower cake replacing soybean meal in beef cattle diets on the in vitro digestibility of dry matter (IVDDM), organic matter (IVDOM), crude protein (IVDCP) and the ruminal fermentation kinetics and parameters. The experiment was analyzed according to a completely randomized design. The treatments consisted of four levels of sunflower cake, 0, 200, 400, 600 g kg-1, replacing soybean meal in the concentrate of beef cattle diets. The coefficients of IVDDM, IVDOM and IVDCP presented a quadratic effect with the addition of sunflower cake. The soluble fraction (fraction B) degradation rate and total gas production decreased linearly with the inclusion of sunflower cake. Values of pH in ruminal fluid were higher for levels 0, 200 and 600 g kg-1 sunflower cake. Sunflower cake can replace soybean meal by up to 280 g kg-1 in the concentrate of beef cattle diets, improving the in vitro digestibility of dry matter organic, matter and crude protein. Levels above 400 g kg-1 reduce ruminal digestion rate, digestibility and release of final fermentation products. 

Metabolizable energy values of corn and wheat middlings in broiler chickens

2019 ◽  
Vol 99 (4) ◽  
pp. 905-913 ◽  
Author(s):  
Andrew Dunaway ◽  
Sunday A. Adedokun
Keyword(s):  
Soybean Meal ◽  
Difference Method ◽  
Broiler Chickens ◽  
Dry Matter ◽  
Metabolizable Energy ◽  
The Other ◽  
N Utilization ◽  
Apparent Metabolizable Energy ◽  
Wheat Middlings ◽  
The Difference

Two experiments were conducted to evaluate adaptation length (AL) and composition of reference diets on nitrogen (N)-corrected apparent metabolizable energy (AMEn) in 22-d-old broilers. Birds were allocated to nine treatments (n = 6) consisting of wheat – soybean meal (SBM) (reference diet), corn–wheat–SBM, and wheat middlings (WM)–wheat–SBM (exp. 1), or oats–SBM (reference diet), corn–oats–SBM, and WM–oats–SBM (exp. 2) in conjunction with three AL (12, 8, and 4 d) in a factorial arrangement of treatments (3 × 3). Dry matter (DM), N, energy (En) utilization, and AMEn of corn and WM were determined using the difference method. In exp. 1, birds on the WM–wheat–SBM-based diet had the lowest (P < 0.05) DM, N, and En utilization, as well as AMEn compared with the other two diets. Additionally, AMEn for corn was higher (P < 0.05) compared with that of WM. In exp. 2, N utilization in birds on the corn–oats–SBM-based diet was lower (P < 0.05) compared with birds on the oats–SBM-based diet; however, AMEn of corn and WM was not different. In both experiments, AL was not significantly different. Based on these results, the composition of the reference diet could influence AMEn values of corn and WM in 22-d-old broilers.

EFFECTS OF STEAM PELLETING DIETS CONTAINING TWO VARIETIES OF RAPESEED MEAL ON PIG PERFORMANCE

1979 ◽  
Vol 59 (3) ◽  
pp. 577-583 ◽  
Author(s):  
R. NARENDRAN ◽  
G. H. BOWMAN ◽  
S. J. SLINGER
Keyword(s):  
Energy Level ◽  
Soybean Meal ◽  
Feed Intake ◽  
Average Daily Gain ◽  
Rapeseed Meal ◽  
Backfat Thickness ◽  
Feed Conversion ◽  
Pig Performance ◽  
G Ratio ◽  
Daily Gain

An experiment was conducted during the late fall and winter months with 96 Yorkshire barrows and gilts to study the effects on pig performance of feeding corn-soybean meal (SBM) and lysine-HCl (0.1%) supplemented corn-SBM-Tower rapeseed meal (RSM) and corn-SBM-Candle RSM diets, in the form of mash (corn was medium-ground) and steam pellets. Average daily gain (ADG), feed intake, efficiency of feed conversion (feed to gain ratio, F/G) and carcass backfat thickness were measured in pigs reared from 23 kg to 91 kg liveweight. The energy level in the RSM diets was not adjusted to equal that in the corn-SBM diet. Pigs fed Tower RSM had a lower (P < 0.01) feed intake and backfat thickness and pigs fed Candle RSM had a lower (P < 0.01) ADG and feed intake and higher (P < 0.01) F/G compared to the pigs fed SBM. The pigs fed corn-SBM-Tower RSM had a higher (P < 0.01) ADG and feed intake and lower (P < 0.01) F/G ratio than those fed Candle RSM diets. Steam pelleting of the corn-SBM and corn-SBM-RSM diets improved ADG, feed intake and F/G of the pigs, with the effects being greatest for the RSM diets.

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