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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Comportamento de pastejo e ganho de peso de bezerras Nelore em sistema de integra??o lavoura-pecu?ria-floresta / Behavior of grazing and weight gain of calves Nellore integrated crop-livestock-forest

Coelho, Felipe Soares 28 September 2011 (has links)
Submitted by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T16:41:05Z No. of bitstreams: 2 felipe_soares_coelho.pdf: 292294 bytes, checksum: d81935017f3c3610c60ef6e9a2c7baf3 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2015-11-17T16:41:42Z (GMT) No. of bitstreams: 2 felipe_soares_coelho.pdf: 292294 bytes, checksum: d81935017f3c3610c60ef6e9a2c7baf3 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) / Made available in DSpace on 2015-11-17T16:41:45Z (GMT). No. of bitstreams: 2 felipe_soares_coelho.pdf: 292294 bytes, checksum: d81935017f3c3610c60ef6e9a2c7baf3 (MD5) license_rdf: 23898 bytes, checksum: e363e809996cf46ada20da1accfcd9c7 (MD5) Previous issue date: 2011 / O experimento foi conduzido na Empresa Brasileira de Pesquisa Agropecu?ria (Embrapa) Gado de Corte, Campo Grande-MS, com o objetivo de avaliar o desempenho e comportamento ingestivo diurno de bezerras Nelore em sistemas integrados, em pastagem de capim-piat? (Brachiaria brizantha cv. BRS Piat?) com ?rvores de eucalipto (Eucalyptus urograndis clone H13) em diferentes densidades. O delineamento experimental foi o de blocos casualizados, em esquema de parcelas subdivididas, com duas repeti??es. Os tratamentos da parcela corresponderam a um fatorial 3x2, sendo tr?s sistemas integrados (iLP, sem ?rvores; iLPF14, com 357 ?rvores/ha; e iLPF22, com 227 ?rvores/ha) e duas alturas de pastejo (alto e baixo). Os tratamentos da subparcela corresponderam a duas ?pocas do ano (ver?o e outono). Na subparcela, os tratamentos terci?rios consistiram nos per?odos do dia: manh? (das 6 ?s 12h00) e tarde (das 12h01 ?s 18h00). As observa??es do comportamento foram realizadas em fevereiro e mar?o de 2011, em quatro dias consecutivos, durante os per?odos de 6 as 12h00 (manh?) e de 12h01 as 18h00 (tarde), em intervalos de 10 minutos, em dois animais-teste por piquete. A maior densidade de ?rvores em sistemas de integra??o lavoura-pecu?ria-floresta (iLPF) proporciona menor tempo de pastejo ao sol e de ingest?o de ?gua pelos animais em pastejo, sem, no entanto, proporcionar diferen?as nas produtividades individuais e do sistema. Os animais permaneceram maior tempo de pastejo ? sombra no per?odo da tarde, evidenciando a busca por melhor conforto t?rmico nos momentos mais quentes do dia. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2011. / ABSTRACT The experiment was conducted at Empresa Brasileira de Pesquisa Agropecu?ria (Embrapa) Beef Cattle, Campo Grande-MS, with the objective of evaluating the performance and diurnal ingestive behavior of Nelore heifers in integrated systems, in Piata pasture grass (Brachiaria brizantha cv . Piata BRS) with eucalyptus trees (Eucalyptus urograndis clone H13) at different densities. The experimental design was randomized blocks in split plots with two replications. The plot treatments consisted of a 3x2 factorial, with three integrated systems (ILP without trees; iLPF14, with 357 trees/ha, and iLPF22, with 227 trees/ha) and two grazing heights (low and high). The subplot treatments consisted of two seasons (summer and fall). In the subplot, the other treatments consisted of the two periods of the day: morning (from 6 to 12:00 am) and afternoon (from 12:01 to 6:00 pm). The behavioral observations were conducted in February and March 2011, on four consecutive days, during periods of 6 to 12.00 (morning) and 12:01 to 6:00 (afternoon) at intervals of 10 minutes in two test animals, by paddock. The highest density of trees in integrated crop-livestock-forest (iLPF) provides lower time grazing at sun and water intake by animals; without, however, provide differences in individual and system productivities. The animals have spent more time grazing in the shade in the afternoon, highlighting the search for better thermal comfort in the hottest moments of the day.
2

Avalia??o de sistemas integrados: iLP e iLPF

Martins, Dailiene Costa 26 March 2018 (has links)
Submitted by Jos? Henrique Henrique (jose.neves@ufvjm.edu.br) on 2018-10-05T17:30:59Z No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dailiene_costa_martins.pdf: 912491 bytes, checksum: 33139be95a4396938cbad99798e74ac2 (MD5) / Approved for entry into archive by Rodrigo Martins Cruz (rodrigo.cruz@ufvjm.edu.br) on 2018-10-05T19:51:28Z (GMT) No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dailiene_costa_martins.pdf: 912491 bytes, checksum: 33139be95a4396938cbad99798e74ac2 (MD5) / Made available in DSpace on 2018-10-05T19:51:28Z (GMT). No. of bitstreams: 2 license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) dailiene_costa_martins.pdf: 912491 bytes, checksum: 33139be95a4396938cbad99798e74ac2 (MD5) Previous issue date: 2018 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior (CAPES) / Os sistemas de integra??o s?o modelos de produ??o sustent?veis que visam melhor uso dos recursos naturais e insumos, gerando maior diversidade de produtos para o produtor rural aumentar sua renda. Estes sistemas s?o mais complexos, pois agregam o componente agr?cola, pecu?rio, e, tamb?m, o florestal em uma mesma ?rea, exigem maior controle do manejo das forrageiras e intera??es com o ambiente, que t?m efeito na produ??o de produtos de origem animal. Objetivou-se avaliar as caracter?sticas da pastagem e o desempenho produtivo de bovinos da ra?a Nelore, em dois sistemas de integra??o, ILP e ILPF, nas esta??es de ver?o e inverno. O experimento foi conduzido na Embrapa Gado de Corte, Campo Grande-MS, em ?rea experimental com dois sistemas, um de integra??o lavoura-pecu?ria-floresta (ILPF) com 227 ?rvores/ha de Eucalyptus urograndis e outro de integra??o lavoura-pecu?ria (ILP) com ?rvores nativas remanescentes, ambos com pastagens de Brachiaria brizantha cv. BRS Piat?. O delineamento experimental utilizado foi o de blocos completos ao acaso em esquema de parcelas subdivididas, em que as parcelas consistiram em dois sistemas de integra??o (ILP e ILPF) e, as subparcelas, nas esta??es do ano (inverno e ver?o). A produ??o de massa seca (PMS) de forragem foi maior no ILP (3.412 kg/ha) que no ILPF (2.308 kg/ha). Para o ganho de peso vivo (GPV) e o ganho m?dio di?rio, n?o foram encontradas diferen?as significativas (P>0,05) entre os tratamentos ILP 238,6 kg/ha; 475,4 g/cab. dia) e ILPF (268,7 kg/ha; 581,4 g/cab. dia). O desempenho animal n?o foi prejudicado pela menor massa seca de forragem no ILPF, na esta??o de ver?o. Os valores de prote?na e DIVMO da folha foram maiores no ILPF. / Disserta??o (Mestrado) ? Programa de P?s-Gradua??o em Zootecnia, Universidade Federal dos Vales do Jequitinhonha e Mucuri, 2018. / Integrated systems are sustainable production models that aim at better use of natural resources, generating greater diversity of products for the rural producer to increase their income. These systems are more complex, since they add the agricultural component, livestock, and also the forest in the same area, require greater control of forage management and interactions with the environment, which have an effect on the production of animal products. The objective of this study was to evaluate the forage production and animal performance of Nellore cattle in two integrated systems, ICL (integrated crop-livestock) and ICLF (integrated crop-livestock-forestry) in summer and winter season. The experiment was perfomed at Embrapa Gado de Corte, Campo Grande - MS, in an experimental area with two integrated systems, crop-livestock-forest (ICLF) with 227 trees/ ha of eucalyptus urograndis and crop-livestock (ICL) with 5 remnant native trees, both with pasture of Brachiaria brizantha cv. BRS Piat?. The experimental design consisted of two complete integration systems (ILP and ILPF), and the subplots, in the seasons (winter and summer). Forage dry matter production (PMS) was higher in ILP (3,412 kg / ha) than in ILPF (2,308 kg/ ha). For the live weight gain (GPV) and average daily gain, no significant differences (P> 0.05) were found between ILP treatments 238.6 kg/ ha; 475.4 g/ cab. day) and ILPF (268.7 kg/ ha, 581.4 g/ day). Animal performance was not affected by the lower dry mass of forage in the ILPF, in the summer season. The protein and IVDOM of leaf were higher in ILCF.

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