Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca.
Brazil is among the leading producers and exporters of world beef, reaching a record in 2015 of 215.2 million of animals. The objective of this study was to evaluate the effects of low consumption supplementation strategies during cattle rearing on productive performance in the first drought after w...
| Autor principal: | Pires, Thiago de Jesus Sabóia |
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| Grau: | Dissertação |
| Idioma: | pt_BR |
| Publicado em: |
Universidade Federal do Tocantins
2022
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http://hdl.handle.net/11612/3690 |
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ir-11612-3690 |
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ir-11612-36902022-03-16T06:01:19Z Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. Pires, Thiago de Jesus Sabóia Alexandrino, Emerson Miotto, Frabrícia Rocha Chaves aditivo, desempenho, forrageira, suplemento. CNPQ::CIENCIAS AGRARIAS Brazil is among the leading producers and exporters of world beef, reaching a record in 2015 of 215.2 million of animals. The objective of this study was to evaluate the effects of low consumption supplementation strategies during cattle rearing on productive performance in the first drought after weaning. The experimental design was a completely randomized block design, with three replications of area, in a subdivided plots scheme, with treatments (mineral mix, additive mineral mix and energy protein supplement) allocated to the plots, and the periods (Transition, Drought start And end of drought) in the subplots. Thirty-six non-castrated steers were used, 12 animals per treatment, with three replicates of each area, using ad alternating grazing system, with a fixed stocking rate of 4 animals.ha-1, providing ad libitum supplements. The total dry herbage mass probably did not restrict consumption, being influenced by the periods, with a higher value of 3,399.82 kg.ha-1 at the end of the drought, while the leaf-stem ratio responded differently according to the strategies of supplementation with values of 0.71; 0.59 and 0.60, respectively, for mineral blend, mineral additive and energy protein. The leaf blade was the most affected component during grazing times and the evaluation period, as well as the pre-grazing leaf-stem ratio (L.S-1), with a significant difference between the beginning of the dry season 1.75 and the end of dryness 0.81. The highest values of total digestible nutrients were from the transition period 57.14% in relation to the beginning of the drought and the end of the drought with 51.40 and 47.89%, respectively. It was observed consumption of 138, 94 and 508 g.day-1.head-1, respectively, for the mineral mixture, mineral mixture and protein-energetic. Both supplementation and the periods of evaluation altered the mean weight gain (ABW) of the grazing animals, and independently. The highest ABW were observed when the post-grazing started with a leaf mass of 2,000 kg.ha-1 or greater and a L.S-1 ratio higher than 1.5. The additional gain of the protein-energy supplement in relation to MM was 34.84 kg, more than one arroba of difference per animal. The variation in ABW of the animals allowed the exploitation of different loads in the pastures, totaling a productivity of 3.5; 4.68 and 7.68 @.ha-1 during the critical period of the year. The daily cost was R$ 0.18; R$ 0.16 and R$ 0.60.head-1, which multiplied by the experimental period had the total cost with supplementation of R$ 35.46; R$ 31.52 and R$ 112.20, respectively, for mineral blend, mineral additive and protein-energy supplement. Therefore, only the additives in the mineral mixture were not sufficient to increase the ABW of grazing animals during the first post-weaning drought. O Brasil está entre os principais produtores e exportadores de carne bovina mundial, alcançando efetivo recorde em 2015 de 215,2 milhões de cabeças. Objetivou-se avaliar os efeitos das estratégias de suplementação de baixo consumo durante a recria de bovinos sobre o desempenho produtivo na primeira seca pós desmame dos animais. O delineamento experimental foi o de blocos inteiramente casualizados, com três repetições de área, em esquema de parcelas subdivididas, com os tratamentos (mistura mineral, mistura mineral aditivada e suplemento proteico energético) alocados nas parcelas, e os períodos (Transição, Início da seca e Final da seca) nas sub-parcelas. Foram utilizados 36 novilhos anelorados, não castrados, sendo 12 animais por tratamento, com três repetições de área cada, explorando um sistema alternado de pastejo, com taxa de lotação fixa de 4 animais.ha-1, fornecendo os suplementos ad libitum. A massa seca total de forragem provavelmente não restringiu o consumo, sendo influenciada pelos períodos, com maior valor de 3399,82 kg.ha-1 no final da seca, enquanto a relação folha.colmo-1 respondeu de forma diferenciada em função das estratégias de suplementação com valores de 0,71; 0,59 e 0,60, respectivamente, para mistura mineral, mineral aditivado e proteico energético. A lâmina foliar foi o componente mais afetado ao longo dos momentos de pastejo e período de avaliação, assim como a relação folha.colmo-1 (F.C-1) pré-pastejo, com diferença significativa entre o início da seca 1,75 e o final da seca 0,81. Os maiores valores de nutrientes digestíveis totais foram do período de transição 57,14% em relação ao início da seca e final da seca com 51,40 e 47,89%, respectivamente. Foi observado consumo de 138, 94 e 508 g.dia-1.cabeça-1, respectivamente, para a mistura mineral, mistura mineral aditivada e proteico-energético. Tanto a suplementação como os períodos de avaliação alteraram o ganho de peso médio (GMD) dos animais em pastejo, e de forma independente. Os maiores GMD foram observados quando o pós-pastejo iniciava com massa seca de lâmina foliar igual ou superior a 2,000 kg.ha-1 e relação F.C-1 superior a 1,5. O ganho adicional do suplemento proteico-energético em relação ao MM foi de 34,84 kg, mais de uma arroba de diferença por animal. A variação no GMD dos animais permitiu a exploração de diferentes cargas nas pastagens, totalizando-se uma produtividade de 3,5; 4,68 e 7,68@.ha-1 durante o período crítico do ano. O custo diário foi de R$ 0,18; R$ 0,16 e R$ 0,60.cab-1, que multiplicado pelo período experimental teve o custo total com suplementação de R$ 35,46; R$ 31,52 e R$ 112,20, respectivamente, para a mistura mineral, mineral aditivado e suplemento proteico-energético. Portanto, somente os aditivos na mistura mineral não foram suficientes para incrementar o GMD dos animais em pastejo durante a primeira seca pós-desmame. 2022-03-15T12:35:04Z 2022-03-15T12:35:04Z 2017-02-20 Dissertação PIRES, Thiago de Jesus Sabóia. Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca.. 2017. 44f. Dissertação (Mestrado em Ciência Animal Tropical) – Universidade Federal do Tocantins, Programa de Pós-Graduação em Ciência Animal Tropical, Araguaína, 2017. http://hdl.handle.net/11612/3690 pt_BR Open Access application/pdf application/pdf Universidade Federal do Tocantins BR Programa de Pós-Graduação em Ciência Animal Tropical - PPGCat Araguaína |
| institution |
Repositório Institucional - Universidade Federal do Tocantins - UFT |
| collection |
RepositorioUFT |
| language |
pt_BR |
| topic |
aditivo, desempenho, forrageira, suplemento. CNPQ::CIENCIAS AGRARIAS |
| spellingShingle |
aditivo, desempenho, forrageira, suplemento. CNPQ::CIENCIAS AGRARIAS Pires, Thiago de Jesus Sabóia Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| topic_facet |
aditivo, desempenho, forrageira, suplemento. CNPQ::CIENCIAS AGRARIAS |
| description |
Brazil is among the leading producers and exporters of world beef, reaching a record in 2015 of 215.2 million of animals. The objective of this study was to evaluate the effects of low consumption supplementation strategies during cattle rearing on productive performance in the first drought after weaning. The experimental design was a completely randomized block design, with three replications of area, in a subdivided plots scheme, with treatments (mineral mix, additive mineral mix and energy protein supplement) allocated to the plots, and the periods (Transition, Drought start And end of drought) in the subplots. Thirty-six non-castrated steers were used, 12 animals per treatment, with three replicates of each area, using ad alternating grazing system, with a fixed stocking rate of 4 animals.ha-1, providing ad libitum supplements. The total dry herbage mass probably did not restrict consumption, being influenced by the periods, with a higher value of 3,399.82 kg.ha-1 at the end of the drought, while the leaf-stem ratio responded differently according to the strategies of supplementation with values of 0.71; 0.59 and 0.60, respectively, for mineral blend, mineral additive and energy protein. The leaf blade was the most affected component during grazing times and the evaluation period, as well as the pre-grazing leaf-stem ratio (L.S-1), with a significant difference between the beginning of the dry season 1.75 and the end of dryness 0.81. The highest values of total digestible nutrients were from the transition period 57.14% in relation to the beginning of the drought and the end of the drought with 51.40 and 47.89%, respectively. It was observed consumption of 138, 94 and 508 g.day-1.head-1, respectively, for the mineral mixture, mineral mixture and protein-energetic. Both supplementation and the periods of evaluation altered the mean weight gain (ABW) of the grazing animals, and independently. The highest ABW were observed when the post-grazing started with a leaf mass of 2,000 kg.ha-1 or greater and a L.S-1 ratio higher than 1.5. The additional gain of the protein-energy supplement in relation to MM was 34.84 kg, more than one arroba of difference per animal. The variation in ABW of the animals allowed the exploitation of different loads in the pastures, totaling a productivity of 3.5; 4.68 and 7.68 @.ha-1 during the critical period of the year. The daily cost was R$ 0.18; R$ 0.16 and R$ 0.60.head-1, which multiplied by the experimental period had the total cost with supplementation of R$ 35.46; R$ 31.52 and R$ 112.20, respectively, for mineral blend, mineral additive and protein-energy supplement. Therefore, only the additives in the mineral mixture were not sufficient to increase the ABW of grazing animals during the first post-weaning drought. |
| author_additional |
Alexandrino, Emerson |
| author_additionalStr |
Alexandrino, Emerson |
| format |
Dissertação |
| author |
Pires, Thiago de Jesus Sabóia |
| title |
Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| title_short |
Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| title_full |
Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| title_fullStr |
Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| title_full_unstemmed |
Suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| title_sort |
suplementação de baixo consumo na recria de bovinos em pastejo durante a seca. |
| publisher |
Universidade Federal do Tocantins |
| publishDate |
2022 |
| url |
http://hdl.handle.net/11612/3690 |
| _version_ |
1787134567228899328 |
| score |
11.653393 |