Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T17:43:39Z No. of bitstreams: 2 patricia_monteiro_costa.pdf: 502036 bytes, checksum: 032cd25c3dc0c50f0fb888d41c9d7414 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T17:44:18Z (GMT) No. of bitstreams: 2 patricia_monteiro_costa.pdf: 502036 bytes, checksum: 032cd25c3dc0c50f0fb888d41c9d7414 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-17T17:44:18Z (GMT). No. of bitstreams: 2 patricia_monteiro_costa.pdf: 502036 bytes, checksum: 032cd25c3dc0c50f0fb888d41c9d7414 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2011-04-28 / Foram realizados dois experimentos para avalia??o das caracter?sticas produtivas e qualitativas de forragens produzidas em sistemas de cons?rcio milho, capim-braqui?ria e diferentes leguminosas. No primeiro, avaliou-se a produtividade, composi??o bromatol?gica e perfil fermentativo das silagens dos seguintes tratamentos: milho em cultivo exclusivo (MCE); cons?rcio milho, capim-braqui?ria (MB), cons?rcio milho, capim-braqui?ria e Calopogonium mucunoides (MBC); cons?rcio milho, capim-braqui?ria e Macrotyloma axillare (MBM) e cons?rcio milho, capim-braqui?ria e Stylozanthes capitata (MBS). O delineamento experimental utilizado foi inteiramente casualizado. Para cada tipo de cultivo ceifaram-se aleatoriamente cinco parcelas ou repeti??es de tr?s metros lineares e procedeu-se uma separa??o do material. As vari?veis avaliadas foram: produtividade da mat?ria seca por ?rea (PMS/ha), produtividade da MS do milho por ?rea (PMS milho-kg/ha), produ??o de prote?na bruta por ?rea (PPB-kg/ha), e produtividade de nutrientes digest?veis totais por ?rea (PNDT-kg/ha). Houve diferen?a entre as formas de cultivo para a produ??o de mat?ria seca por hectare. O milho cultivo exclusivo (MCE), n?o diferiu de milho e capim-braqui?ria (MB) e milho, capim-braqui?ria e Calopogonioum mucunoides (MBC), entretanto foi superior aos cons?rcios milho, capim-braqui?ria e Macrotyloma axillare (MBM) e milho, capim-braqui?ria e Stylosanthes captata (MBS). O material oriundo das culturas foi ensilado quando os gr?os de milho encontravam-se numa posi??o intermedi?ria na ?linha do leite?, com mat?ria-seca entre 28 e 32. Ent?o o material foi colocado e adequadamente compactado em silos baldes de polivinil carbono, nos quais foram adaptados flanges nas tampas para permitir o extravasamento de gases. Ap?s o enchimento, os baldes foram lacrados para evitar a troca de ar com o meio. Retirou-se uma amostra de cada repeti??o para a determina??o dos teores de MS, PB, extrato et?reo (EE), lignina, FDN, FDA e NDT. Os teores de MS, PB, FDN, FDA, lignina e NDT n?o variaram entre as silagens dos diferentes tratamentos. Uma fra??o de amostra de silagem de cada tratamento foi prensada para extra??o do suco e determina??o do pH, do teor de ?cido l?tico, but?rico. Os teores de ?cido l?tico n?o variaram entre os tratamentos. O teor de ?cido but?rico do MCE (0,0252% na MS) diferiu dos tratamentos MBM e MBS que apresentaram valores de 0,0358 e 0,0403% na MS, respectivamente. Todas as silagens apresentaram boa qualidade com bons padr?es de fermenta??o. No segundo experimento avaliou-se o consumo, a produ??o e composi??o do leite de vacas F1 (Holand?s x Gir) alimentadas com silagens oriundas de forragens dos diferentes cons?rcios acima relatados. Para tanto, utilizaram-se cinco vacas em mesmo per?odo de lacta??o, distribu?das em um quadrado latino balanceado (5x5). Os animais receberam as cinco dietas e concentrado comercial. O experimento foi constitu?do de cinco per?odos com dura??o de dez dias cada (sete de adapta??o ?s dietas e tr?s para coleta). Os animais foram mantidos em baias individuais, cobertas, com piso cimentado, contendo comedouros e bebedouros individuais. Foram avaliados o consumo a digestibilidade, a produ??o e a composi??o do leite das vacas. N?o foram observadas varia??es no consumo e na digestibilidade das diferentes silagens pelos animais. A produ??o e a composi??o de leite n?o diferiram entre os tratamentos. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT Two experiments had been conducted to evaluate the productivity and quality of forages produced on intercropping systems - corn, signal grass and various legumes. At first, there has been evaluated the yield, chemical composition and fermentation characteristics of silages of the following treatments: corn in exclusive cultivation (MCE); intercropping corn and signal grass (MB); intercropping corn, signal grass and Calopogonium mucunoides (MBC), intercropping corn, signal grass and Macrotyloma axillare (MBM) and intercropping corn, signal grass and Stylozanthes capitata (MBS). The experimental design was completely randomized. For each type of crop, there have been reaped at random five plots or replications of three linear meters and carried out a separation of the material. The variables evaluated were: dry matter yield per area (PMS/ha); yield of corn?s dry matter per area (corn PMS - kg/ha), crude protein production per unit area (PPB-kg/ha), and yield of total digestible nutrients per unit area (PNDT- kg/ha). There have been differences between the forms of cultivation for the production of dry matter per hectare. The corn in exclusive cultivation (MCE) did not differ from corn and signal grass (MB) and corn, signal grass and Calopogonioum mucunoides (MBC), however, it was higher than corn, signal grass and Macrotyloma axillare (MBM) and corn, signal grass and Stylosantes captata (MBS) intercropping. Material from crop was ensiled when maize grains was in an intermediate position in the "milk line, with dry matter between 28 and 32. Then the material was properly placed and compacted in buckets silos of polyvinyl carbon with a capacity of 12 kg of fresh material; in which were adapted silicone flanges on the covers to allow the release of gas. After filling the buckets they were tightly sealed with adhesive tape to prevent air exchange with the environment. There has been removed a sample of each replicate for the determination of MS, PB, ether extract (EE), lignin, FDN, FDA e NDT. The amount of MS, PB, FDN, FDA, lignin and NDT did not vary among silages from different treatments. The MCE?s amount of butyric acid (0.0252% of MS) differed from the MBM and MBS treatments that had values of 0.0358 and 0.0403% of dry matter, respectively. All silages presented good quality with good standards of fermentation. The second experiment evaluated the milk?s consumption, production and composition of crossbred cows F1 (Holstein x Gir) fed with silages from the different consortia reported above. To this end, there have been used the same five cows in lactation period, distributed in a balanced Latin square (5x5). The animals were fed with the five diets and with commercial concentrate. The experiment consisted of five periods lasting ten days each (seven for adaptation to diets and three for collection). They were kept in individual stalls, covered and with cemented floor, equiped with individual feeders and drinkers There have been evaluated the digestibility, production and composition of cows? milk. There hasn?t been observed variations inn the intake and digestibility of different silage. The production and milk composition did not differ between treatments.