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Made available in DSpace on 2018-11-26T16:34:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2016-04-01. Added 1 bitstream(s) on 2019-10-09T18:25:59Z : No. of bitstreams: 1 S1516-35982016000400165.pdf: 299188 bytes, checksum: b653695401e67df6d6aacd72912bcd23 (MD5) Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objectives of this study were to evaluate the effect of forages with different nutritional values specifically, corn silage (CS), sugar cane (SC), and sugar cane bagasse (SB) in diets with crude glycerin, on carcass traits, meat quality, and fatty acid profile, using young Nellore bulls finished in the feedlot. Thirty young Nellore bulls with an initial average body weight of 416.70 +/- 24.74 kg were randomly assigned to three treatments containing different sources of forage. The carcass traits and variables related to meat quality of the Nellore young bulls were not significantly influenced by different sources of forage in diets with crude glycerin. The yellow color index was significantly greater in the fat of animals fed corn silage. Heptadecenoic fatty acid was significantly lower in the meat of animals fed sugar cane bagasse. The sources of forage in diets with crude glycerin did not influence the profile of saturated, monounsaturated, or polyunsaturated fatty acids in the longissimus muscle. Overall, our results indicate that none of the treatments changed the carcass and meat quality traits of Nellore young bulls finished in the feedlot. Thus, sugar cane and sugar cane bagasse could be used in feedlot as a viable forage alternative to corn silage. Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, Jaboticabal, SP, Brazil CNPq, Brasilia, DF, Brazil Univ Estadual Paulista, Fac Ciencias Agr & Vet, Dept Zootecnia, Jaboticabal, SP, Brazil FAPESP: 2011/00060-8 FAPESP: 2011/11656-9 FAPESP: 2014/09033-1

Submitted by Guilherme Lemeszenski (guilherme@nead.unesp.br) on 2013-08-22T19:08:00Z No. of bitstreams: 1 S1516-35982013000300008.pdf: 297097 bytes, checksum: d76cd77a24bc9c4df0e85c268146f76b (MD5) Made available in DSpace on 2013-08-22T19:08:00Z (GMT). No. of bitstreams: 1 S1516-35982013000300008.pdf: 297097 bytes, checksum: d76cd77a24bc9c4df0e85c268146f76b (MD5) Previous issue date: 2013-03-01 Made available in DSpace on 2013-09-30T20:12:51Z (GMT). No. of bitstreams: 2 S1516-35982013000300008.pdf: 297097 bytes, checksum: d76cd77a24bc9c4df0e85c268146f76b (MD5) S1516-35982013000300008.pdf.txt: 44006 bytes, checksum: 2a446dc10a08c1dc77b3831d065192bb (MD5) Previous issue date: 2013-03-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:18:10Z No. of bitstreams: 2 S1516-35982013000300008.pdf: 297097 bytes, checksum: d76cd77a24bc9c4df0e85c268146f76b (MD5) S1516-35982013000300008.pdf.txt: 44006 bytes, checksum: 2a446dc10a08c1dc77b3831d065192bb (MD5) Made available in DSpace on 2014-05-20T13:18:10Z (GMT). No. of bitstreams: 2 S1516-35982013000300008.pdf: 297097 bytes, checksum: d76cd77a24bc9c4df0e85c268146f76b (MD5) S1516-35982013000300008.pdf.txt: 44006 bytes, checksum: 2a446dc10a08c1dc77b3831d065192bb (MD5) Previous issue date: 2013-03-01 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of the present study was to evaluate the effects of dietary lipid content (20, 40 and 60 g/kg dry matter) on intake, total and ruminal apparent digestibility of dry matter (DM), nutrient digestibility, rumen fermentation parameters, microbial synthesis efficiency and rumen microbial content of beef cattle. Nine cannulated steers at 6 months of age with initial body weight of 232±35 kg were used in a triplicate 3 × 3 Latin square design. The results indicated that the total intake and digestibility of DM, organic matter (OM), gross energy (GE), neutral detergent fiber (NDF) and acid detergent fiber (ADF) were not affected by the lipid content of the diet. However, the lowest lipid content diet reduced the total digestibility of crude protein (CP) and total carbohydrate linearly compared with the highest lipid diet. In contrast, when steers were fed a diet containing 20 g lipids/kg of DM, the concentration of ammonia in the rumen decreased quadratically relative to the other diets. Ruminal pH was not affected by the interaction of treatment and sampling time; however, the rumen pH decreased quadratically in animals that received the highest dietary lipid content (60 g/kg) compared with animals that received 20 and 40 g lipids/kg of DM. The rumen concentrations of volatile fatty acids, propionate, and butyrate and the acetate/propionate ratio were affected by the dietary lipid content. However, the microbial population, microbial N flow, and efficiency of synthesis were not affected by dietary lipid content. Overall, an increase in the lipid content of the diet of Nellore steers resulted in similar digestive profiles and fermentation conditions. Universidade Estadual Paulista Departamento de Zootecnia Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA) Centro Nacional de Pesquisa de Gado de Leite Universidade Federal de Goiás (UFG) Departamento de Produção Animal Universidade Estadual Paulista Departamento de Zootecnia

Made available in DSpace on 2013-08-12T18:05:54Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-09-01 Made available in DSpace on 2013-09-30T18:01:43Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-09-01 Submitted by Vitor Silverio Rodrigues (vitorsrodrigues@reitoria.unesp.br) on 2014-05-20T13:18:38Z No. of bitstreams: 0 Made available in DSpace on 2014-05-20T13:18:38Z (GMT). No. of bitstreams: 0 Previous issue date: 2012-09-01 Item merged in doublecheck by Felipe Arakaki (fe.arakaki@gmail.com) on 2015-11-11T13:53:28Z Item was identical to item(s): 4540, 4248 at handle(s): http://hdl.handle.net/11449/4654, http://hdl.handle.net/11449/4362 Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) The objective of this study was to evaluate the effect of increasing levels of crude protein (CP) in the diet (13, 15, 19 and 22 g/100 g of dry matter, DM) on the metabolism and ruminal parameters of crossbred heifers fed forage sugarcane. Four crossbred Holstein x Gir heifers of average initial weight of 200 kg and average age of 14 months were used. The experimental design was in a 4 x 4 latin square. The intake values of DM, organic matter (OM), neutral detergent fiber (NDF) and non-fibrous carbohydrates (NFC) were not affected by the protein contents of the diet. The apparent and ruminal digestibility of DM and OM were affected by the protein content of the diet. Greater total apparent digestibility coefficient of CP (0.749) was observed for the content of 22 g CP/100 g DM, whereas the ruminal digestibility of CP was not affected by treatments. The efficiency of microbial protein synthesis was not different between the CP contents of the diet. There was increasing linear effect of the CP content in the diet on the plasma concentration of urea. The rumen pH of the heifers was similar between treatments, with an average of 6.3. The concentration of rumen ammonia nitrogen was affected by the protein content of the diet, with the highest averages at 22 and 19 CP/100 g DM (27.5 and 31.6 mg/dL); an average of 21.1 mg/dL in the diet with 15 g CP/100 g DM; and the lowest average observed in the diet containing 13 g CP/100 g DM, 14.0 mg/dL. It is recommended to use 13 g CP/100 g DM in the diet for crossbred Holstein x Gir heifers in the post-weaning phase consuming diets based on sugarcane, because this level promotes increase in the digestibility of the diet and lower concentrations of plasma urea nitrogen and ammonia nitrogen, showing better animal metabolism, in addition to a possible decrease in the cost of the diet. Univ Estadual Paulista, Fac Ciencias Agr & Vet, São Paulo, Brazil APTA Reg Alta Mogiana, Colina, SP, Brazil UNESP Faculdade de Ciências Agrárias e Veterinárias