de Moraes, Anibal

Monteiro, Alda L. G.

Poli, Cesar H. E. C.

Prado, O. R.

Ribeiro, T. D. M.

von L. Piazzetta, H.

English

University of Kentucky

University of Kentucky UKnowledge International Grassland Congress Proceedings 21st International Grassland Congress / 8th International Rangeland Congress Productivity of Different Lamb Production Systems in Temperate and Tropical Pasture of the Southern Region of Brazil Alda L. G. Monteiro Federal University of Paraná, Brazil Cesar H. E. C. Poli Federal University of Rio Grande do Sul, Brazil T. D. M. Ribeiro Paulista State University, Brazil Anibal de Moraes Federal University of Paraná, Brazil O. R. Prado Federal University of Paraná, Brazil See next page for additional authors Follow this and additional works at: https://uknowledge.uky.edu/igc  Part of the Plant Sciences Commons, and the Soil Science Commons This document is available at https://uknowledge.uky.edu/igc/21/9-2/24 The 21st International Grassland Congress / 8th International Rangeland Congress took place in Hohhot, China from June 29 through July 5, 2008. Proceedings edited by Organizing Committee of 2008 IGC/IRC Conference Published by Guangdong People's Publishing House This Event is brought to you for free and open access by the Plant and Soil Sciences at UKnowledge. It has been accepted for inclusion in International Grassland Congress Proceedings by an authorized administrator of UKnowledge. For more information, please contact UKnowledge@lsv.uky.edu. Presenter Information Alda L. G. Monteiro, Cesar H. E. C. Poli, T. D. M. Ribeiro, Anibal de Moraes, O. R. Prado, and H. von L. Piazzetta This event is available at UKnowledge: https://uknowledge.uky.edu/igc/21/9-2/24 　 Multifunctional Grasslands in a Changing World 　 Volume Ⅱ 　 瞯 ]91　 瞯Grasslands/Rangelands Production Systems——— Livestock Production SystemsProductivity of different lamb production systems in temperate and tropical pasture of thesouthern region of BrazilA .L .G .Monteiro1 ,C .H .E .C .Poli2 ,T .M .D .Ribeiro3 ,A .de Moraes1 ,O .R .Prado1 ,H .von L .Piaz zetta41 Lecturer o f Federal University o f Paraná2 Lecturer o f Federal University o f Rio G rande do Sul3 Post‐graduate student o f Paulista S tate University4 Post‐graduate student o f Federal University o f ParanáA ddress : Rua Ibá Mesquita I lha Moreira ,180/702 ,Zip Code 91340‐190 ,Porto A legre ,RS ,Braz il . E‐mail : cesar .poli ＠u f rgs .brKey words : feedlot ,creep feeding ,weaned lamb ,Tif ton ８５ ,ryegrassIntroduction In Brazilian sheep production systems there are �modern" systems using a lot of concentrate or �traditional"systems utilizing lower technology .Due to the various systems ,it is important to have research data for farmers to use whenchoosing their system of management .Material and methods During two years (２００３‐２００４) ,experiments were conducted to assess the potential performance of lambsgrazing Tif ton ８５ ( Cynodon spp .) and ryegrass ( Lolium multi f lorum ) in different production systems : around ４５ to ６０ daysold weaned lambs were (１) kept on pasture ; (２) kept with their mother on pasture ; (３ ) kept with their mother on pastures ofTif ton ８５ and ryegrass and receiving concentrate in creep feeding ; or ( ４ ) assigned to a feedlot ,receiving alfalfa hay or maizesilage plus a balanced concentrate .The Suffolk lambs in the first were ６０ days old when the experiment started the first year and４５ days old when the experiment started the second year .The animals were weighed every １４ days with a １６ hour of water fast .The males were slaughtered at ３２ kg of live weight .Body weight gain of lambs was calculated by the difference between finalweight and initial weight and divided by the number of days in the experiment .The experiment was allocated in a completelyrandomized design .The pasture treatments were maintained using continuous variable stocking .Results and discussion The lamb performance and slaughter age are in Table １ ( the lambs finished in Tif ton‐８５) and Table ２ ( thelambs finished in ryegrass ) .There was a significant effect of the treatments on the lamb performance .The feedlot animalsshowed the highest daily weight gain .The supplementation in creep feeding of １％ of live weight of lambs did not have an effecton lambs kept with their mothers grazing tropical nor temperate pastures .Table 1 Estimated means o f lamb body weight gain daily ( g / day ) and slaughter age ( days) o f f inishing lambs in T i f ton 85pasture in the f irst year o f ex periment (2003) .Lambs body weight gain/ day ( g ) Slaughter age of lambs ( day)Weaned lamb in Tif ton‐８５ 膊１０７ c １３１ aLambs without weaning in Tif ton‐８５ ２８１ b １０１ bLambs in creep feeding ＋ Tifton‐８５  ２８２ b １０５ bWeaned lambs with ６０ days ＋ feedlot ４３７ a ９４ bSmall letter in the same column differ by Tukey test ( P ＜ ０ .０５)Table 2 Estimated means o f lamb body weight gain daily ( g / day ) and slaughter age ( days) o f f inishing lambs in ryegrassp asture and f eedlot (2004) .Lambs body weight gain/ day ( g ) Slaughter age of lambs ( day)Weaned lamb in ryegrass １１５ b １５８ bLambs without weaning in ryegrass ３０３ a １０６ aLambs in creep feeding ＋ ryegrass ２９４ a ９６ aWeaned lambs with ４５ days ＋ feedlot ３３８ a １０５ aSmall letter in the same column differ by Tukey test ( P ＜ ０ .０５)Conclusions The presence of dams had an important positive effect on individual performance of lambs when compared to weanedones ,both at Tif ton‐８５ in summer pastures as ryegrass in the winter .The system that the lambs were weaned and finished inpasture showed higher slaughter age and extending the production cycle due to increase the time required for animals in pastureto reach ３２ kg of BW ,both in summer and in winter .

Productivity of Different Lamb Production Systems in Temperate and Tropical Pasture of the Southern Region of Brazil

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Productivity of Different Lamb Production Systems in Temperate and Tropical Pasture of the Southern Region of Brazil

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