scholarly journals PSXII-18 The influence of molybdenum in drinking water or feed on apparent absorption and retention of molybdenum and copper in beef steers

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 423-424
Author(s):  
Meghan P Thorndyke ◽  
Nicole M Tillquist ◽  
Nicole M Jones ◽  
Terry Engle
Keyword(s):  
Drinking Water ◽  
Dry Matter ◽  
Block Design ◽  
Sodium Molybdate ◽  
Mixed Effects ◽  
Dry Matter Intake ◽  
Beef Steers ◽  
Apparent Absorption ◽  
Randomized Block Design ◽  
Intake Control

Abstract Twelve Angus steers (BW 694.1 ± 47.4 kg) fitted ruminal cannulae were used to examine the effect of molybdenum (Mo) supplemented in drinking water or feed on apparent absorption and retention of Mo and copper (Cu). Steers were fed a low-quality grass hay diet (DM basis: 6.5% CP; 0.13% S, 3.4 mg Cu/kg, 2.4 mg Mo/kg) for 14 d. Steers were then housed in individual metabolism stalls for 3 d to determine DMI. Steers were then blocked by BW and DMI and randomly assigned within block to one of three treatments (n = 4 steers per treatment). Treatments consisted of: 1) Control (no supplemental Mo); 2) 5.0 mg Mo/kg DM from sodium molybdate dihydrate (Mo-diet), and 3) 1.5 mg Mo/l from sodium molybdate dihydrate delivered in the drinking water (Mo-water). After the 3d DMI determination period, total fecal and urine output was collected for 5 d. Dry matter intake and DM digestibility were similar across treatments. Data were analyzed using a mixed effects model (PROC MIXED, SAS) for a completely randomized block design. Apparent absorption of Cu was greater (P < 0.05) in Control and Mo-water steers when compared to Mo-diet steers. Apparent retention of Cu was greater (P < 0.05) in Control steers when compared to Mo-diet steers. Steers receiving Mo-water had a similar apparent retention of Cu when compared to Control and Mo-diet steers. By design, treatment was a significant (P < 0.01) source of variation for Mo intake. Control steers had lesser (P < 0.05) Mo intake when compared to Mo-diet and Mo-water supplemented steers. Apparent absorption and retention of Mo were greater (P < 0.05) in Mo-diet steers compared to Control and Mo-water steers. These data indicate that Mo metabolism and apparent absorption of Cu are different when Mo is supplemented in water relative to feed.

Effect of intraruminal infusion of urea on the response in voluntary food intake by sheep

1985 ◽  
Vol 36 (3) ◽  
pp. 483 ◽  
Author(s):  
JK Egan ◽  
PT Doyle
Keyword(s):  
Organic Matter ◽  
Food Intake ◽  
Dry Matter ◽  
Block Design ◽  
Ammonia Nitrogen ◽  
Dry Matter Intake ◽  
Plant Cell Walls ◽  
Randomized Block Design ◽  
Ad Libitum ◽  
Ad Libitum Intake

Six mature Merino sheep received three treatments in a randomized block design experiment. The treatments were: chopped oaten hay diet at 90% of ad libitum intake without urea (L); the ciet offered at the same level as for L with urea infused into the rumen at 11.5 g kg-1 dry matter intake (LU); and the diet offered at 90% of the ad libitum intake achieved with urea infused at 11.5 g kg-1 dry matter intake (HU). Sheep given HU consumed 37% more (P < 0.01) organic matter (OM) than those fed L or LU, but the apparent digestibility of OM did not vary (59.2-61.8%) between treatments. The addit onal food consumption was associated with c. 20% increase (P < 0.05) in the weight of OM in the reticulorumen and significantly higher (by 10-35%; P < 0.05) fractional outflow rates of most dietary and microbial constituents of digesta. The fractional digestion rate of potentially digestible plant cell walls was not affected by urea, but the flow of microbial non-ammonia nitrogen from the abomasum was enhanced (L, 7.0; LU, 8.2; HU, 12.5 g day-1; P < 0.05). The results of this study suggest that the stimulatory effect of urea upon food intake was associated with the provision of additional microbial protein for digestion in the intestines, rather than changes in the rate or extent of organic matter fermentation in the reticulorumen.

scholarly journals PSIV-3 Effect of winter-feeding system and roughage level in feedlot ration on subsequent spring grazing behavior and dry matter intake of beef growing heifers

2019 ◽  
Vol 97 (Supplement_3) ◽  
pp. 228-229
Author(s):  
María Victoria Burjel ◽  
Alvaro Simeone ◽  
Oscar Bentancur ◽  
Natalia Zabalveytia ◽  
Virginia Beretta
Keyword(s):  
Repeated Measures ◽  
Dry Matter ◽  
Block Design ◽  
Ingestive Behavior ◽  
Dry Matter Intake ◽  
Feeding System ◽  
Grazing Behavior ◽  
Randomized Block Design ◽  
Winter Feeding

Abstract This study aimed to evaluate the effect of winter-feeding system (grazing, GFS vs. feedlot, FFS) and ration roughage level (RL), on subsequent spring grazing behavior and forage dry matter intake (DMI). Thirty-two Hereford female calves (149 ± 13 kg) were assigned to four winter dietary treatments (110 days) in a randomized block design (n = 2/treatment): three feedlot rations differing RL (Setaria italica) (0%, 35% or 70% DM) or oats grazing (5 kg DM/100 kg LW). In spring (84 days) all treatments grazed a mixed grass-legume pastures (4317 ± 1009 kg DM/ha; 6 kg DM/100 kg LW). During weeks 1, 3 and 5 after changing diets, diurnal behavior activity (effective/search grazing, rumination, idling or water intake) was visually recorded and DMI estimated from the in vivo DM digestibility (DMD) and fecal production. Data were analyzed according to a block design with repeated measures, with general model including block, treatment (T), week (W) and T×W effects. Means were compared through orthogonal contrasts (Table 1). Spring DMI varied with T (P = 0.0084) regardless of W effect (P = 0.1619), with higher values for GFS compared to FFS (1.55 vs. 1.16 kg/100 kg LW, P = 0.0034) and for 70RL compared to 35RL (P = 0.0286). DMD did not differ between treatments (P = 0.2488) but was lower on W1 than W5 (55 vs. 64 %, P = 0.0150). T×W was significant (P &lt; 0.0001) for effective grazing, rumination and idling. On W1, heifers from GFS grazed less (0.40 vs. 0.49, P = 0.0268) but tended to ruminate more (0.26 vs. 0.18, P = 0.0591) than FFS. As pasture DMD improved (W5) GFS grazed more (0.64 vs. 0.51, P = 0.0020) but ruminated less (0.14 vs. 0.21, P = 0.0450) than FFS. Transition from FFS to spring grazing might reduce pasture DMI modifying animal ingestive behavior compare to animals from GFS. Impact could be higher when ration RL is below 70%.

scholarly journals 227 Evaluation of reimplant timing with Revalor-200 on steer performance and carcass characteristics

2019 ◽  
Vol 97 (Supplement_2) ◽  
pp. 127-128
Author(s):  
Caitlin A Coulson ◽  
Bradley M Boyd ◽  
Henry Hilscher ◽  
Brandon L Nuttelman ◽  
Grant I Crawford ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Carcass Characteristics ◽  
The Other ◽  
Carcass Weight ◽  
Dry Matter Intake ◽  
Optimal Time ◽  
Trenbolone Acetate ◽  
First Derivative ◽  
Randomized Block Design

Abstract The objective of this study was to evaluate the optimal time to reimplant following an initial implant on performance and carcass characteristics when steers were fed for 180 d. Crossbred steers (n = 800; initial BW = 330 ± 25 kg) were utilized in a generalized randomized block design and assigned randomly to pen, and pen assigned randomly to one of five treatments. Treatments included 5 different days on terminal (DOT) implant (160, 120, 100, 80 or 40 DOT). All steers were given an initial implant (80 mg trenbolone acetate (TBA) + 16 mg estradiol; Revalor-IS) on d 1. Terminal implant consisted of 200 mg TBA + 20 mg estradiol (Revalor-200). Dry matter intake was the least for 40 DOT (P ≤ 0.04), with no differences between the other treatments (P ≥ 0.11). Carcass-adjusted final BW responded quadratically (P = 0.03) with 100 DOT having the greatest final BW but was not different from 120 DOT (P = 0.82). Carcass-adjusted ADG and G:F responded quadratically (P = 0.02 and P < 0.01, respectively). When solved for the first derivative, carcass-adjusted ADG and G:F were maximized at 99 and 87 DOT, respectively. However, there was less than a 2% difference in carcass-adjusted ADG and G:F between 80 and 120 DOT. Hot carcass weight responded quadratically (P = 0.03), with the greatest HCW at 100 DOT. Solving for the first derivative, HCW was optimized at 104 DOT. There were no differences in back fat, marbling, or yield grade (P ≥ 0.27). Overall, administering an initial implant followed by a terminal implant 85 to 105 d prior to harvest increased gain, efficiency, and HCW in steers when fed for 180 d. Minimal changes in performance and carcass characteristics when steers are reimplanted 80 to 120 d prior to harvest suggests flexibility in reimplanting windows.

scholarly journals 294 Effects of bedding application on growth performance and carcass traits in finishing beef steers during the winter and spring in eastern South Dakota

2020 ◽  
Vol 98 (Supplement_3) ◽  
pp. 143-143
Author(s):  
Dathan Smerchek ◽  
Zachary K Smith
Keyword(s):  
South Dakota ◽  
Growth Performance ◽  
Dry Matter ◽  
Block Design ◽  
Concrete Surface ◽  
Dry Matter Intake ◽  
Experimental Unit ◽  
Beef Steers ◽  
Phase Growth ◽  
Randomized Complete Block Design

Abstract Two-hundred and forty Continental × English beef steers (allotment BW = 365 kg [SD 22.5]) were used in a randomized complete block design feedlot study to evaluate the effects of bedding application during the finishing phase. Steers were allotted to 30 concrete surface pens (n = 8 steers/pen) at the Ruminant Nutrition Center (RNC) in Brookings, SD. A common diet was fed that contained 2.09 Mcal/kg of NEm and 1.39 Mcal/kg of NEg and provided 30 g/ton of monensin sodium to diet DM. Pens were assigned to 1 of 2 treatments: 1) No bedding applied (NO) or 2) 1.8 kg (as-is basis) of wheat straw bedding/steer/d (BED). The first 9 pen replicates began on test 14 d prior to the last 6 pen replicates. Pen was the experimental unit; an α of 0.05 determined significance. This study was part of a factorial experiment that included steroidal implant. No interactions were detected (P ≥ 0.09). Daily ambient temperature (n = 183) averaged 4.33°C [SD 3.21] during the study. Dry matter intake was increased (P = 0.01) by 5.8% in BED compared to NO. Carcass-adjusted ADG (P = 0.01) and G:F (P = 0.01) were increased in BED by 21.0% and 14.4%, respectively. Carcass-adjusted final BW and HCW tended to differ (P ≤ 0.07) between NO and BED. Cattle from NO required an additional 35 days to achieve similar final live BW. Rib eye area (P = 0.69) did not differ between NO and BED. Dressing percentage (P = 0.01; 63.29 vs. 62.30 ± 0.410%), backfat (P = 0.01; 1.19 vs. 1.09 ± 0.410 cm), marbling (P = 0.01; 475 vs. 437 ± 6.6), and yield grade (P = 0.03; 2.95 vs. 2.81 ± 0.045) were increased in NO. Estimated metabolic rate was elevated (P = 0.02; 0.0995 vs. 0.0948 ± 0.013 Mcal/BW0.75, kg), for NO vs. BED. Bedding improved feedlot finishing phase growth performance and gain efficiency during finishing in eastern South Dakota.

scholarly journals PSXII-12 The influence of long-term molybdenum supplementation (in drinking water or feed) on beef calf performance through weaning

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 436-437
Author(s):  
Meghan P Thorndyke ◽  
Octavio Guimaraes ◽  
Nicole M Tillquist ◽  
Briana V Tangredi ◽  
Joanis T Zervoudakis ◽  
...  
Keyword(s):  
Drinking Water ◽  
Block Design ◽  
Basal Diet ◽  
Beef Cows ◽  
Mixed Effects ◽  
Protein Supplement ◽  
Offspring Performance ◽  
Randomized Block Design ◽  
Calf Performance

Abstract Fifty-four multiparous beef cows were used to examine the effect of molybdenum (Mo) supplemented in drinking water or feed on offspring performance. Cows were blocked by body weight (BW) and age into one of 6 groups. Group were then randomly assigned to treatment. Treatments consisted of: 1) Control (no supplemental Mo or Cu), 2) Control+Cu (3 mg Cu/kg DM from CuSO4·5H2O added to the basal diet), 3) Control + 500 µg Mo/L from MoNa2O4·2H2O in drinking water (Mo 500-water), 4) Control + 1000 µg Mo/L of MoNa2O4·2H2O in drinking water (Mo 1000-water), 5) Mo 1000-water plus 3 mg Cu/kg DM from CuSO4·5H2O added to the basal diet (Mo 1000-water+Cu, and 6) Control plus 3 mg Mo/kg DM from MoNa2O4·2H2O added to the basal diet (3.0 Mo-diet). Cows were housed in dry lot pens (n = 3 cows/pen; 3 pens/treatment) and fed a low-quality grass hay diet (DM basis: 6.6% CP; 0.14% S, 6.2 mg Cu/kg, 2.3 mg Mo/kg) and a protein supplement (30% CP). Cows received their respective treatments beginning 60 d prior to breeding and remained on treatments until all calves were weaned at approximately 7 mo. of age. Calf birth weights were collected on the day of birth and all calves were weaned on the same day. Data were analyzed using a mixed effects model for a completely randomized block design. Birthweight, ADG, and 205d adjusted weaning weights were similar (P &gt; 0.05) across treatments. These data indicate that Mo supplemented in the drinking water or the diet regardless of the inclusion of additional Cu did not impact calf performance through weaning.

Effect of dietary addition of wastewater from a caramel producing plant on the performance and carcass characteristics of pigs

1969 ◽  
Vol 89 (1-2) ◽  
pp. 23-37
Author(s):  
Esbal Jiménez ◽  
Carmen S. Santana-Nieves ◽  
Abner A. Rodríguez
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Block Design ◽  
Carcass Characteristics ◽  
Dry Matter Intake ◽  
Daily Weight Gain ◽  
Control Group ◽  
Production Plant ◽  
Randomized Block Design ◽  
Crossbred Pigs

Twenty-four crossbred pigs (Duroc x Yorkshire), 28 days old and of 6.9 kg average liveweight, were used to evaluate effects of dietary addition of 0 (control), 5, and 7.5% of wastewater from a caramel production plant (WWCP) on performance from weaning to finishing at 82 kg average liveweight and on carcass characteristics. A completely randomized block design was used (n = 4). Pigs were fed at the rate of 8% of body weight daily during the postweaning phase (21 days) and 6% for the rest of the experiment. During the post-weaning phase dry matter intake, liveweight gain and feed efficiency were improved with 7.5% but not with 5% addition of WWCP (P ≤  0.08). During the fattening phase (until 74 kg average liveweight), daily dry matter intake and daily weight gain were greater in the control group, whereas during the finishing phase (14 days), feed efficiency improved with the addition of either level of WWCP (P ≤  0.08). Longissimus dorsi area and ham weight were greater in females than in barrows (P ≤  0.05), but no other differences due to the dietary addition of WWCP were detected. These results suggest that swine growth during the first three weeks post-weaning may be improved by the addition of WWCP to the diet at levels of up to 7.5%. However, before further recommendation can be given, additional research is needed on the effectiveness of the use of this wastewater during the fattening-finishing phase. Freshness of this byproduct seemed to have an important effect.

scholarly journals The Use of Coffee Husk as Napier Grass Substitution and Its Effect on Madura Cattle Performance

2019 ◽  
Vol 24 (4) ◽  
pp. 166
Author(s):  
Asep Sudarman ◽  
G B Listiawan ◽  
L Khodijah
Keyword(s):  
Feed Efficiency ◽  
Dry Matter ◽  
Block Design ◽  
Average Daily Gain ◽  
Napier Grass ◽  
Dry Matter Intake ◽  
Coffee Husk ◽  
Feed Digestibility ◽  
Randomized Block Design ◽  
Daily Gain

This research aimed to evaluate the performance of fattened madura cattle fed on coffee husk as a source of fibre to substitute grasses. Twenty Madura steers aged approximately 1.5 to 2.0 years with initial weight of 165-190 kg were divided randomly into four different experimental diets, namely R0= 90% concentrates +0% coffee husk +10% napier grass, R1= 90 % concentrates +3.33% coffee husk +6.67% napier grass, R2 = 90% concentrate +10% 6.67% coffee husk +3.33% napier grass, R3 = 90% concentrates 90% + 10% coffee husk +0% napier grass. The feed was given at 3% body weight of dry mater. The cows were kept in individual pen for two months. Variables measured were dry mater intake, feed efficiency, average daily gain (ADG), digestibility of feed and income over feed cost. Data obtained were analyzed using analysis of variance based on randomized block design followed by Duncan’s multiple range test. Results showed that dry matter intake, ADG, feed efficiency and feed digestibility of cattle on each treatment of the feed were not significantly different (P > 0.05). Average of dry matter intake and daily gain for R0, R1, R2, and R3 were 6.01, 5.84, 5.73 and 5.62 kg/head/day and 0.88, 0.87, 0.84 and 0.93 kg/head/day respectively. While the average of feed efficiency and DM digestibility for R0, R1, R2, and R3 were 14.64, 14.89, 14.65 and 16.54 % and 84.82, 84.37, 83.47 and 83.30 %, respectively. It is concluded that the used of 10% coffee husk as a source of fibre for substitution of napier grass can be used without negative effect on madura’s cattle performances and tend to give higher values of IOFC on fattening program.

scholarly journals Effect of zinc sources and experimental conditions on zinc balance in growing wethers

2022 ◽  
Author(s):  
C Lee ◽  
J E Copelin ◽  
M T Socha
Keyword(s):  
Crude Protein ◽  
Dry Matter ◽  
Block Design ◽  
Latin Square ◽  
Basal Diet ◽  
Neutral Detergent Fiber ◽  
Dry Matter Intake ◽  
Experimental Conditions ◽  
Randomized Block Design ◽  
Zinc Balance

Abstract Three experiments were conducted with growing wethers to evaluate apparent excretion and retention of Zn from various sources. In Exp. 1 and 2, Zn-ethylene diamine (ZE), Zn hydroxychloride (ZHYD), Zn-lysine/glutamate (ZAA), and Zn-glycinate (ZG) were used and ZnSO4 (ZS), Zn hydroxychloride (ZHYD), Zn-lysine/glutamate (ZAA), and Zn-glycinate (ZG) were used in Exp. 3. In Exp. 1, 8 wethers were used in a replicated 4 × 4 Latin Square design. In Exp. 2 and 3, 40 wethers were used in a randomized block design. In Exp. 1, each period (total 4 periods) consisted of 14-day diet adaptation and 4 days of total collection of feces and urine. In Exp. 2 and 3, wethers received a basal diet for 14 days and received experimental diets for 9 days (diet adaptation), followed by 4 days of total collection of feces and urine. Total collection was conducted in wooden metabolic cages. All data were analyzed using the MIXED procedure of SAS as a Latin square design for Exp. 1 and a completed randomized block design for Exp. 2 and 3. In all experiments, dry matter intake did not differ among treatments except that it tended to be different in Exp. 2. In Exp. 1, no difference in Zn excretion (88%) and retention (11%) as proportion of Zn intake was observed among Zn sources. In Exp. 2, total tract digestibility of crude protein was greater (P &lt; 0.01) for ZAA than ZE and ZG (82.0 vs. 79.1 and 77.8%, respectively) and greater (P &lt; 0.01) for ZHYD than ZG (80.2 vs. 77.8%). However, total tract digestibility of neutral detergent fiber was low (on average 16%) for all treatments with no difference among treatments in Exp. 2. Apparent excretion and retention of Zn as proportion of Zn intake did not differ among treatments, and Zn retention (~1.4% of Zn intake) was very low for all treatments. In Exp. 3, ZHYD and ZAA had greater retention of Zn (17.8 vs. 1.5%; P = 0.01) than ZG. Fecal Zn excretion was greater (97.3 vs. 81.2%; P = 0.01) for ZG vs. ZHYD and ZAA, and Zn retention for ZG was only 1.5% of Zn intake. In conclusion, potential increases in Zn absorption and retention were observed for ZHYD and ZAA compared with ZS and ZG in Exp. 3 and these differences were not found in Exp. 1 and 2. Experiment 1 used a Latin square design and Exp. 2 used a diet containing largely undigestible fiber. These experimental conditions may have affected Zn metabolism in wethers. Inconsistent results on Zn balance for ZG among the experiments warrant further studies regarding its bioavailability.

scholarly journals Produksi Susu dan Komposisi Susu Sapi Friesian Holstein yang Mendapat Suplemen Tepung Temulawak (Curcuma xanthorriza Roxb)

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Dian Wahyu Harjanti ◽  
Arif Mustaqim ◽  
Rudy Hartanto
Keyword(s):  
Milk Production ◽  
Dry Matter ◽  
Block Design ◽  
Milk Composition ◽  
T Test ◽  
Dry Matter Intake ◽  
Holstein Cows ◽  
Composition Data ◽  
Randomized Block Design ◽  
Paired T Test

ABSTRAK. Penelitian ini bertujuan untuk mengkaji produksi susu dan komposisi susu sapi Friesian Holstein (FH) yang mendapat suplemen tepung temulawak (Curcuma Xanthorriza Roxb). Materi penelitian menggunakan sapi FH berjumlah 12 ekor. Penelitian menggunakan Rancangan Acak Kelompok dengan 2 perlakuan dan 6 kelompok. Perlakuannya adalah T0 = pakan basal (kontrol), T1 = pakan basal + suplemen temulawak (1% kebutuhan BK). Parameter yang diamati yaitu konsumsi bahan kering, produksi susu dan komposisi susu. Data yang diperoleh di analisis menggunakan sidik ragam, untuk data komposisi susu dilakukan uji lanjut dengan Paired T test. Hasil penelitian menunjukkan bahwa pemberian suplemen temulawak tidak berpengaruh nyata terhadap konsumsi BK, produksi susu dan komposisi susu (laktosa, lemak dan protein). Konsumsi BK T0 sebesar 18,06 kgBK, T1 sebesar 18,15 kgBK, rataan produksi susu T0 sebesar 6,49 liter/hari, T1 sebesar 6,30 liter/hari dan komposisi susu T0 dan T1 secara berturut pada laktosa sebesar 4,58 dan 4,56, kandungan lemak secara berurutan 3,65 dan 3,78 serta kandungan protein secara berurutan sebesar 3,16 dan 3,16. Disimpulkan bahwa pemberian suplemen temulawak 1% kebutuhan BK belum mampu meningkatkan konsumsi bahan kering, produksi dan komposisi susu sapi perah laktasi. (Milk production and milk composition of friesian holstein cows fed with temulawak (Curcuma xanthorriza Roxb) supplement) ABSTRACT. This study aims to examine the milk production and milk composition of friesian holstein cows that fed with temulawak (Curcuma xanthorriza Roxb) supplement. The material of research using 12 FH cows. The study used a randomized block design with 2 treatments and 6 groups. The treatments were T0 = basal feed (control), T1 = basal feed + Curcuma supplement (1% dry matter (DM)). The parameters observed were DM consumption, milk production and milk composition. Data obtained were analyzed using ANOVA, for milk composition data were analyzed using Paired T test. The results showed that the administration of temulawak supplement was not proven significantly towards the dry matter intake, milk production and milk composition (lactose, fat and protein). Dry matter intake T0 group was 18,06 kg, dry matter intake T1 group was 18,15 kg, the average milk production T0 group was 6,49 liters / day, milk production T1 group was 6,30 liters / day. Lactose concentration of group T0 and T1 was 4, 58% and 4,56%, fat concentration of group T0 and T1 was 3,65% and 3,78% and protein concentration of group T0 and T1 was 3,16% and 3,16%. In conclusion, supplements of curcumma 1% DM were not alter dry matter intake, milk production and milk composition.

scholarly journals Metabolic dynamics of native lambs fed with Tifton 85 hay or Maniçoba hay associated with the spineless cactus

2020 ◽  
Vol 72 (1) ◽  
pp. 215-223
Author(s):  
P.C. Soares ◽  
L.N.F. Gouveia ◽  
T.G.P. Silva ◽  
E.F. O. Filho ◽  
F.F.R. Carvalho ◽  
...  
Keyword(s):  
Dry Matter ◽  
Cynodon Dactylon ◽  
Metabolic Response ◽  
Block Design ◽  
Linear Increase ◽  
The Body ◽  
Dry Matter Intake ◽  
Blood Metabolites ◽  
Blood Biomarkers ◽  
Randomized Block Design

ABSTRACT The objective of this study was to evaluate the metabolic response of native lambs fed Tifton 85 hay (Cynodon dactylon) or Maniçoba hay (Manihot pseudoglaziovii) associated with spineless cactus (Nopalea cochenillifera Salm Dyck). Sixteen Morada Nova lambs were used, with a mean initial weight of 19.36±1.48kg, distributed in a randomized block design, with two treatments and eight replications. Dry matter intake was higher for lambs fed Maniçoba hay compared to Tifton hay, while the body weight at slaughter was not influenced by diets. Regarding the blood metabolites, only the serum concentration of urea was influenced, with higher value observed in the lambs that fed the diet containing Tifton hay. When analyzing blood biomarkers, in the different biweekly collections, a linear increase in the blood concentration of urea, glucose, fructosamine, alkaline phosphatase and sodium was observed, as well as a quadratic effect for serum potassium. The other blood metabolites were not influenced in function of the collection days. The replacement of Tifton 85 hay for Maniçoba hay does not cause negative changes in the dynamics of different biomarkers and presents itself as a promising forage resource.

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