ABSTRACTSJuly 15-19, 2012Phoenix, Arizona

http://www .jtmtg.org/2012

American Society of Animal ScienceJournal ofAnimal ScienceVolume 90, Supplement 3

American Dairy ScienceAssoclatlon'['

Journal of Dairy Science®Volume 95, Supplement 2

© 2012 ALL RIGHTS RESERVED

This supplement is the definitive source of abstracts contained herein .

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Barajas, R., B. J. Cervantes, M.A. Espino, A. Camacho, 1. Enriquez, C. Barraza, L.R. Flores, J.J. Lomeli, andJ .A. Romo. 2012. Influence of tannins extract supplementation on feedlot performance of receiving bull-calves naturally-infested with gastro intestinal parasites. J. Anim. Sci. Vol. 90 (Suppl. 3):261 (abstract)

T24 Infíuence oí" tannins extraer supplementatíou on feedlotperformance ofreccivíng bull-calves naturally mfested wíth gastrointestinal parasites. R. Barajas?", B. 1. Cervantes'', M. A. Espinol',A. Camacho", 1. Enriquez ', C. Barraza', L. R. Flores", 1. 1. Lomeli',and 1. A. Romo', 1Fl'IiIVZ-Universidad Autonáma de Sin aloa, Culi-acán, Sinaloa. México, JGanadera Los Migueles S.A. de C. ~:. Culi-acan, Sinaloa, Mexico. 3Pronutnent Developers, León, Guanuiuato.México.

Sixty-five bull-calves 171 ± SE 2.77 kg were used to determine theinfluence of'tannins extraer supplernentation on feedlot performance 01'

receiving bull-calves naturalty-infested with gastro intestinal parasites.Bull-calvcs wcre individually wcighcd, car-tagged, and grouped in 4blocks using initial wcight critcria for reduction of social interaetion,and allotted in 16 ground floor pens (6 x 12 m). Bull-calves wereweighed d 1 and 28 when Ieces and blood samples were raken fromeach bull-calve to exploring the presence of gastro-intestinal parasites,blood parasites and plasma urca nitrogen (PUN) determination. Insideeach block, pens werc randomly assigned to receive 1 of2 treatments:l) F eeding with a 70%eoncentrate ground sorghum-Dfrfi-canola mea]based diet (CTRL; !1 = 32); 01' 2) Diet similar to CTRL, added with0.3%. (dry matterbasis) oftannins extract (TE; n = 33). Tannins extractwas supplied as TMP-Protein Enhancer (Técnica Mineral Pecuaria;México), a prernix that contains 56% of a condensed (Quebracho tree)and soluble (Chesnurt) tannins-hlend. Number of infested animals wascompared using Chi-squared test. Nurnber of parasites-eggs by grarnof Ieccs data (NEGF) was transformed to square-root before analyses.NEGF, PUN, fina! weight and Average daily gain were analyzed byANOVA. No blood-parasites were found. Eggs of found parasitescorresponded tú: < i (85%), Eimeria sp. (72%), Coopcria sp. (71%),Trichostrougylus sp. (52%), andEsuphagustomus sp. (32%). In d 1 and2R thc amount of infestcd-calvcs and the NEGf were similar (P > 0.50)between rreatments, TE supplemenration decreased tP = 0.03) 15.5%¡PlJN concentration {14.06 vs. ¡1.88 mg/dl.). Final weight was similarbetween treatments (P = D.51). Average daily gain tended to be higher(P = 0.(7) in bull-calves fcd-TE (1.370 vs. 1.191 kg/day for TE andCTRL, rcspcctively. It is concludcd that tannins extraer supplementa-riou in dose near to O.3v¡,) of dietary D1\1, did not produce changes onGl parasires popularion of receiving bull-calves.

Key Words: feedlot-calves, parasites, tannins

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T 24Influence of tannins extract supplementarion on feedlot performance 01' receiving bull-calves naturally-infested

with gastro intestinal parasites

R. Barajas", B. J. Cervantes', M.A. Espino': 3, A. Carnacho', r. Enriquez', C. Barraza', L.R. Floresl, 1.1. Lorneli', and 1.A. Romo!

I Facultad de Medicina Veterinaria y Zootecnia. Universidad Autónoma de Sinaloa, México:! Ganadera Los Migueles, S.A. de C.V. 3 Pronutrient Developers, S.A. de C.V.

rubar@uas.uasnet.mx

Abstr. No.

Introduction

Tannins in médium and high dose havethe capacity of affect gastro intestinalparasites. In low dosage near of 0.3% ofdietary DM, tannins improve feedlotperformance of cattle. However, inunknown if tannins in low dosage are ableto modifies gastro intestinal parasitespopulation or induce a better performancein naturally infested bull-calves.

Objective

To determine the influenee oftannins extraet supplementation on

• feedlot performance of receivingbull-calves naturally-infested withgastro intestinal parasites.

Material and Methods

Sixty five bull-calves 171 ± SE 2.77 kg

Bull-calves were individually weighed,ear-tagged, and grouped in four blocksusing initial weight criteria 1'01' reduction01' social interaction, and allotted in 16ground floor pens (6 x 12 m). Bull-calveswere weighed days 1 and 28 when fecesand blood sarnples were taken from eachbull-calve to exploring the presence 01'

gastro-intestinal parasites, blood parasites,and plasma urea nitrogen (PUN)determination. Inside each block, penswere randomly assigned to receive one of

two treatments: Tannins extract wassupplied as TMP-Protein Enhancer(Técnica Mineral Pecuaria; Mexico), aprernix that contains 56% of a condensedand soluble tannins-blend

Experimental design:Complete randomized block design

Treatments:1) Feeding with a 70% concentrate

ground sorghum-DDG-canola mealbased diet (CTRL; n = 32).

2) Diet similar to CTRL, added with 0.3%(dry matter basis) 01' tannins extract(TE; n = 33).

Number 01' infested animals wascompared using Chi square test. Number01' parasites-eggs by gram 01' feces data(NEGF) was transformed to square-rootbefore analyses. NEGF, PUN, finalweight and Average daily gain wereanalyzed by ANOV A.

Results

Table 1. lnfluence oftannins extract addition into the diet on body weight gain01' bull-calves naturally infested with gastro intestinal parasites

Variable Treatments p:value

Control Tannins

Mean ± SEMI Mean ± SEMI

32 33

171.65 2.767 169.81 2.980 0.60

205.01 3.795 208.19 4.087 0.51

1.191 0.078 1.370 0.084 0.07

19.81 0.564 18.38 0.821 0.14

14.06 0.649 11.88 0.752 0.03

80 140 0.52

245 229 0.61

Bull-calves, n

Body weight day 1, kg

Body weight day 28, kg

ADG, kg/day

PUN day 14

PUN day 28

Parasites account day 28, ogh

Eimeria sp

Haentonchus contortus d-28

I Standard error of the mean

Conclusion

Tannins extract supplementation in low dose near to 0.3% 01' dietary DM, didnot produce changes on GI parasites population of receivjng bull-calves, but areable to induce a better weight gain response, despite those cattle are infestedwith G1 parasites.