Information is needed on response to lasalocid and monensin under conditions of rapid adaptation to high-concentrate diets and short periods of finishing for heavyweight cattle. Two experiments were conducted to obtain data when feeding under these conditions

Embry, L. B.

Goetz, M. J.

Luther, R. M.

English

Public Research Access Institutional Repository and Information Exchange

South Dakota State UniversityOpen PRAIRIE: Open Public Research Access InstitutionalRepository and Information ExchangeSouth Dakota Cattle Feeders Field Day Proceedingsand Research Reports, 1983 Animal Science Reports1983Lasalocid or Monensin Supplementation for ShortPeriods of FinishingL. B. EmbrySouth Dakota State UniversityM. J. GoetzR. M. LutherFollow this and additional works at: http://openprairie.sdstate.edu/sd_cattlefeed_1983This Report is brought to you for free and open access by the Animal Science Reports at Open PRAIRIE: Open Public Research Access InstitutionalRepository and Information Exchange. It has been accepted for inclusion in South Dakota Cattle Feeders Field Day Proceedings and Research Reports,1983 by an authorized administrator of Open PRAIRIE: Open Public Research Access Institutional Repository and Information Exchange. For moreinformation, please contact michael.biondo@sdstate.edu.Recommended CitationEmbry, L. B.; Goetz, M. J.; and Luther, R. M., "Lasalocid or Monensin Supplementation for Short Periods of Finishing" (1983). SouthDakota Cattle Feeders Field Day Proceedings and Research Reports, 1983. Paper 3.http://openprairie.sdstate.edu/sd_cattlefeed_1983/3LASALOCID OR MONENSIN SUPPLEMENTATION FOR SHORT PERIODS OF FINISHING L. B. Emb ry, M. J .  Goetz and R .  M. Luther D ep artment of Animal and Rang e Sciences CATTLE 83-2 Lasal ocid or monensin was fed to steers for p erio d s  of ap p roximatel y 9 week s in two exp eriments at 300 mg d ail y in 90% conc entrate d iets to d etermine val u e  o f  th e p ro d u cts for rap id ad ap tatio n o f  cattl e to h ig h  g rain d iets and for short p erio d s  of finish ing with h eav y weig h t  c attl e. Wh en chang ed from a fu l l  feed o f  al fal fa h ayl ag � p l us 5 l b  of corn grain to th e 90% c o ncentrate diets and nearl y a fu l l feed o v er a p eriod of 10 d ays , th ere were no majo r or consis tent d ifferences in feed c o nsump tion b etween s teers fed l as al ocid or monensin and for eith er in comparison to th e c ontro l g roup . I n  th e two exp eriments , weig h t  g ain responses o f  115% and 1171. w ere o b s erved for th e cattl e fed l asal ocid in c o mp ariso n  to th e c entral g roup s. Weig h t  g ain for s teers fed monensin was 106% o f  th at for co ntro l s  in one exp eriment and 98% in th e o th er . Effec ts on weigh t g ain were g reater at 3 w eek s th an at 9 weeks , and th e earl y effec ts were greater for l asal oc id th an for monensin. With onl y s mal l d ifferenc es in feed cons u mp tio n ,  imp rove­ments in feed efficiency were s imil ar to th ose for weig h t  g ain. Cu rrent emp h asis o n  conservation p ractices, qual ity of th e environment and worl d food need s could h ave imp ortant infl uences on meat animal p ro d u ction. It is frequentl y mentioned th at more c f  th e total p roduc tion sh ou l d b e  from th e g razing animal and g 1�eater u s e  mad e o -f h arvested forag es . F inish ing p erio d s  cou l d  s til l b e  d es irab l e  and economical b u t  mig h t  b e  much s h orter th an most p res ent-d ay feed l ot finish ing . ing, d iet p l ay With a s h o rt p eriod <2 to 3 month s )  o f  h ig h -g rain finish ­i t b ecomes imp ortant to ad ap t c attl e to th e h ig h -energ y in a few d ays. Manag ement p rac tices d u ring this p eriod may a major ro l e  in th e succ �ss of th e feed ing op eratio n. F eed ad d itives . that requ ire a p eriod o f  ad ap tation to minimiz e red uctions in feed c o ns u mp tio n and weig h t  g ain may h ave l imited use d uring s h o rt p erio d s  o f  finish ing for u nadap ted cattl e. On th e o th er h and � a feed add itive h av ing some d ep �essing effect o n  feed intake c o u l d b e  �sed to an ad v antag e und er th ese c o nd itions ; and th ose p rod u c ing a more favo rab l e  5 un d er t h ese c on d i t i o n s; a n d t h ose p r o d u c i n g a mar e  f a v o r able r umen e n v i r onmen t d ur i n g a d ap t at i on to h i g h-c o n c e n t r a t e  d i e t s  w o u l d b e  b e n ef i c i a l . I n f orma t i on i s  n e e d e d  o n  r e s p o n s e  t o  l as aloc i d  a n d  mon en s i n u n d e r  c o n d i t i on s  o f  r ap i d a d ap t at i on t o  h i g h - c on c en t r a t e  d i et s  a n d  s h o r t  p er i o d s  o f  f i n i sh i n g f or h ea vywe i g h t  c a t t l e . T w o  ex p er i me n t s  wer e c on d uc t ed t o  o b t a i n  d a t a  w h en f eed i n g un d er t h es e  c on d i t i on s .  S i x t y- t h r ee s t e e r s  < He r e f or d , H e r ef o r d- A n g us a n d  H e r ef o r d ­L i mo us i n) w e r e  used i n  t h i s  e x p er i me n t . T h e s e  c at tle w e r e  r emoved f r om p as t u r e  i n  m i d-Oc t ob e r  a n d  f ed a g r ow i n g  t y p e  d i et c omp o s e d  of 5 l b  c o r n  g r a i n a n d  a f ull f eed of a l f a l f a  h ay l a g e  f or a b out 2 mon t h s  p r i o r  t o  t h e  exp e r i men t. T h e  eip er i me n t  w a s  d es i g n ed f er a h i g h- g r a i n f i n i sh i n g p er i od o f  t h r ee 21- d ay p er i od s  w i t h  a n  e x p ec t ed f eed l ot g a i n o f  a b ou t  200 l b .  T h e  s t ee r s  wer e all o t t e d  t o  9 p en s  of 7 e a c h  o n  b a s i s o f  w e i g h t  a n d  b r eed g r ou p . T h r ee d i e t a r y  t r ea t me n t s  e a c h  r ep l i ­c a t e d  t h r ee t i mes were c on t r o l , 300 mg l as a l oc i d  d a i ly an d 300 mg mon en s i n d a i l y .  T h e  f i n i sh i n g d i e t w a s  a g r a i n-h a y l a g e  m i x o f  90% w h o l e c o r n  g r a i n  a n d  1 0% a l f a l f a  h ay l a g e  (d r y  b a s i s) w i t h  1 lb p er h e a d  d a i l y  o f  a 32% p r o t e i n s u p p lemen t .  T h e  c or n  g r a i n c on ­t a i n e d  a n  a v e r a g e  o f  7 3.3% d r y  mat t e r  a n d  t h e  h ay l ag e  52. 7 % . T h e  s up p l emen t  was p r i mar i l y  s o y b ean meal w i t h  a d d ed m i n er als and v i t am i n A. Lasaloc i d  o r  monen s i n p r i mary p r em i x es wer e a d d e d  t o  t h e  sup p leme n t s  t o  p r ov i d e  the 300-mg t r eatme n t  l evels i n  1 l b  o f  s u p p leme n t . T h e  c at t l e wer e c h an g e d  f r om t h e  l i m i t ed g r a i n d i et t o  t h e  h i g h g r a i n e x p e r i men t a l  d i et an d t o  n e ar l y  a f ull f ee d  over a p e r i od o f  1 0  d ay s . Feed i n g w a s  o n c e  d a i ly a n d  i n  amoun t s  t o  b e  n early c on sumed b y  t h e  n ex t  f e ed i n g o n c e  o n  f u l l  f ee d . I n g r e­d i en t s  w e r e  we i g h e d  a n d  m i xed o n  a p en b as i s t o  g i ve t h e  p r op er r at i o  o n  a d r y  b as i s o f  c o n c en t r at es t o  r oug h ag e . N o  i mp l a n t  t r ea tmen t s  wer e used . T h e  c a t tle wer e w e i g h e d  a t  3-wee k i n t e r va l s w i t h o u t  s h r i n k . D a t a  w e r e  summa r i ze d  f or r a t e  o f  g a i n ,  f ee d  c on sump t i on a n d  f ee d  ef f i c i en c y  a t  t h e  3- , 6- a n d  9-w e e k  p er i od s .  Seven t y- t w o  s t ee r s  o f  Her e f o r d , H e r e f o r d -A n g us a n d  A n g u s  b r ee d i n g  wer e used i n  t h i s  ex p e r i me n t .  F o r  a b out 3 mon t h s  p r i or t o  th e e x p er i men t ,  t h ese c a t tle w e r e  f ed i n  t h e  s ame man n er a s  t hese used i n  e x p er i me n t  1. T h e  aver a g e  w e i g h t  o n  e x p er i me n t  2 6 was ab out 960 lb in c omparison t o  ab out 9 15 lb f or ex p erime n t  1. Because of lar g e r  b o d y  t yp es , t h e  e x p erime n t  2 wer e c o n si d e r ed t o  n ee d  a h eavier mar k e t  t h e  d esir e d  mar k et f inish. t h o se in cat tle i n  �>Jeig h t  f or T h e s e  s t ee r s  wer e allot t ed t o  9 p e n s  of 8 eac h f or t h e  t h r ee dietar y t r eat men t s  as i n  ex p erime n t  1. Feed i n g r edien t s  wer e from t h e  same sour c es a s  f or ex p erime n t  1 an d p r oc ed ur e s  wer e e s s e n t ially t h e  sam e . N o  p eriod o f  g rad ual adap tat ion t o  lasalocid o r  m o n e n sin was allowed i n  eit h e r  ex p erim e n t .  Resul t s  f or daily gain, aa11y f ee d  an d f ee d  ef f icien c y  ar e presen t ed in t h e  tables f or eac h ex p erimen t an d averaged f or t h e  t wo .  Dat es f or eac h  exp e rimen t an d initial a n d  final weig h t s  ar e s h own i n  table 1. C old w eat h e r  e x is t ed d ur i n g  t h e  ex p eri­m e n t  wit h  ex tremel y  low win d  c hill t em p erat u r e s  d urin g t h e  last o n e-hal f  of Jan uar y .  TABLE 1. I t e m  I N I T I AL AND F I NAL WE I GHTS Con tr-· ol h�§£.l9f;l.Q (300 mg/daily) tJ9!J�!J?.ifJ < :300 mg/ d a i 1 y;. E:-:p . 1: Dec e m b er 9, 198 1, t o  Feb r uar y 12, 1982 - 65 days Number of s t eer s Initial �..,t, lb Final wt, l b  E:-:p. 2: Dec e m b er Numb er· of s t e e r s  Initial �>Jt , lb Final wt, l b  2 1  9 13 1 1 16 21. 909 1. 146 198 1, t o  Feb r ua r y 23, 24· 24 91::-7 -...}, 954 1 1 17 1 139 2 1  9 13 1129 l.982 - 63 days 24 95B 1 1 1  ::s Average daily gai n s  at t h e  3-,6- a n d 9-w e e k  p eriod s a r e  s h own in table 2. Th e p eriodic w ei g h t  gai n s  s h ow t h es e  n o n ­implan t ed c a t t l e  mad e  g o o d  r a t e s  o f  gain d u r i n g  t h e  s ever e  c old weat h er . In t h e  f ir s t  ex p erimen t ,  t h er e  w e r e  p r o n o u n c e d  a d van tag e s  in weig h t  g ain f or cat tle f e d eit h e r  lasalocid or mon e n sin at eac h cf t h e  t h r e e  wei g h  p eriod s .  T h e  a dvan tag e over c o n t r ol s  w a s  g r eatest d ur i n g  t h e  f i r s t 3 wee k s  when c ha n g i n g  f r om t h e  high r ou g h a g e  t o  t h e  hig h c o n c en t ra t e  diet . Lasalocid ap p ear e d  t o  b e  mor e b en e f ic ial t han m o n e n sin un d e r t h e se c o n dition s . 7 TABLE 2. DA I LY GA I N  <LB> --------------------------------------------------------------I tem 3 wee k s  6 wee k s  9 w ee k s  < shru n k )  :::;; wee k s  6 �'\le e k s  9 wee k s  ( shr·u.n k )  3 wee k s  6 wee k s  9 wee k s  a Control 1 .  69 2. 4t7 3. 1 2  2 . 64 2 . 49 2c: 1 7  2 . 49 2n83 l.:.£a!l!l!2-=.t9. (300 mg/dai. l y )  a 2.79 ( 1 65) 3ci6 1 ( 1 45) 3 . 65 ( 1 1 7) b 3.0 8  ( 1 1 7) 2u 7::::; ( 1 1 0) 2"92 ( 1 1 5) 2.94 ( 1 35) 3. 1 7  ( 1 27) 3u29 ( 1 1 6) t!Q0.§0.?.!.0. < 300 mg/d a i ly ) 2 . 42 ( 1 4 8) 2. 88 ( 1. 1 6) 3. 3 2  ( 1 06) 3. 1 9  ( 1 2 1 ) 2.64 ( 1 06) 2.47 ( 98) 2.8 1 ( 1 29) 2 . 76 ( 1 1 1 ) 2.90 ( 1.02) Values i n  paren theses represent percent of controls f or the p eriod. b Averag e  f or two pen s f or th i s  3-we e k  per i o d  b ecause o f  a water i n g  problem f or o n e  p e n  i n  the group. I n  the seco n d  e x peri ment, one pen of cattle was n ot i n­cluded i n  the 3-week g a i n  data b ecaus e  of a water i n g  problem. Wei ght g a i n s  at 3 w e e k s  w ere at h i gher rates than those i n  e x peri ment 1 ,  w i th the control group show i n g  more i mprovement o ver e x per i ment l than d i d  the lasaloc i d  an d mon en s i n groups. There was a d ecrease i n  rate of ga i n  f or all treatment groups at 6 wee k s  and also at 9 wee k s  f or steers f ed mon en s i n. Averag ed for the two e x per i ments , there appeared to be an ad vantag e <P< . 1 0) f or lasaloc i d  a n d  f or monen s i n i n  compari son to controls at 3 wee k s  of the experiments. The ad vantage i n  comparison to controls was greater C P< .0 1 >  fbr lasaloc i d  at 6 and 9 wee k s  w i th lasalocid hav i n g  an advantag e <P< . 05) over monens i n at 6 a n d  9 w ee k s . 8 Feed consu mp t ion dat a are shown in t ab le 3. Feed o f f ered was b y  s ch edu le f or ab out 2 of t h e  f irst 3 weeks, ch ang ing f ro m  ab out 20% concent rat e diet s t o  90% concent rat e diet s i n  10 days and a f u ll f eed in ab out 2 weeks does cause p rob lems at t imes . Ap p earance o f  t h e  cat t le, f eces and f eed int ake during t h is t ime did not s how any ap p arent dif f erence b et w een t reat ment g roup s. I t em � � weeks 6 w eeks 9 weeks 3 w eeks 6 weeks 9 weeks < � weeks 6 weeks 9 w eeks TABLE 3. DA I LY FEED <DRY>, LB Cont rol 18.19 18.90 20. 15 21 .01 21. 34 21 .14 19.60 20.12 20. 65 b§§�!9£i� (300 mg /daily> 18.59 20.06 20.78 20 .57 20 .88 21.32 19.58 20.47 21.05 �QD§D2iD (300 mg /daily) 18 .59 18 .99 19. 82 20 .72 21 .01 21. 71 19 .66 20.00 20. 77 D at a  o n  f eed ef f iciencies are s hown in t ab le 4 .  S ince t h ere were no major or cons ist ent dif f erences in f eed consump ­t io n  b et w een t reat ment g roup s �  f eed/g ain dat a are p rimarily ref lect ions of rat e of g ain. St eers fed lasalocid were sig nif i­cant ly CP<. 01) more ef f icient t h an co nt ro ls at 6 and 9 w eeks of the s t u dy and more ef f icient t h an monensin o ver t h e  ent ire s t u dy .  9 Byg I t em 3 wee k s  6 w e e k s  9 w ee k s  3 wee k s  6 w ee k s  9 w ee k s  S!:!.R.� .1 ' w e e k s  ·-· 6 wee k s  9 wee k s  a §QQ TABLE 4. FEED I GAIN C on t r o l  11. 41 7.66 6.47 8.08 8 .. 82 8.43 .... ::f 9.75 8.24 7.45 b§1§§1l9£i.Q (300 mg/d aily) a 6.72 (59) 5.59 (73) 5.70 (88) 6.66 (82) 7.72 (88) 7.30 (87) 6.69 (69) 6.66 (81) 6.50 (87) t!.QO§!J§iD. <300 mg/d a i ly) 7.67 (62) 6.61 (86) 5.99 (93) 6. 57 (81) 7. 99 ( 91) 8.84 (105) 7.12 (73) 7.30 (86) 7.42 ( 100 Values i n  p a r e n t h eses r e p r es e n t  per c e n t of c o n t r o l s f or t h e  p eriod. 10 

Lasalocid or Monensin Supplementation for Short Periods of Finishing

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Lasalocid or Monensin Supplementation for Short Periods of Finishing

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