Pasture characteristics and productive performance of dairy cows under two grazing management strategies
The objective of this work was to evaluate the supply, morphological and chemical composition of forage, performance and milk composition of crossbred cows managed in Megathyrsus maximus cv. Tanzania in intermittent grazing system with fixed and variable defoliation intervals according to the interc...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2020-04-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/37072 |
| _version_ | 1797944500670169088 |
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| author | Alberto Magno Fernandes Tadeu Silva Oliveira Alisson Rodrigues Jordão Domingos Sávio Campos Paciullo Danielle Ferreira Baffa Michele Gabriel Camilo |
| author_facet | Alberto Magno Fernandes Tadeu Silva Oliveira Alisson Rodrigues Jordão Domingos Sávio Campos Paciullo Danielle Ferreira Baffa Michele Gabriel Camilo |
| author_sort | Alberto Magno Fernandes |
| collection | DOAJ |
| description | The objective of this work was to evaluate the supply, morphological and chemical composition of forage, performance and milk composition of crossbred cows managed in Megathyrsus maximus cv. Tanzania in intermittent grazing system with fixed and variable defoliation intervals according to the interception of 95% of photosynthetically active radiation by the canopy. The experimental design was a randomized complete block design with two treatments and two area replications. In each grazing cycle the supply, morphological composition, forage nutritive value, dry matter intake, milk production and composition were determined. The experimental area was 4.0 hectares, divided into two blocks of 2 hectares. Each block was subdivided into 22 pickets (11 for each treatment) totaling 44 pickets with an area of 909 m2 each. Significant differences (P < 0.05) were observed for leaf blade content, in vitro digestibility of dry matter and forage crude protein, dry matter intake, individual and area milk production and lactose content milk, being the highest values found in the pastures managed with variable defoliation interval. Thus, the defoliation interval defined by the 95% interception of the photosynthetically luminosity leads to higher leaf blade proportions in the forage canopy, resulting in higher individual milk yield and per unit area, but with a loss of protein and total solids contents of milk. |
| first_indexed | 2024-04-10T20:39:38Z |
| format | Article |
| id | doaj.art-a2d8302f3ba94c7db81381dd8f46d832 |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-04-10T20:39:38Z |
| publishDate | 2020-04-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-a2d8302f3ba94c7db81381dd8f46d8322023-01-24T19:56:08ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592020-04-0141310.5433/1679-0359.2020v41n3p1017Pasture characteristics and productive performance of dairy cows under two grazing management strategiesAlberto Magno Fernandes0Tadeu Silva Oliveira1Alisson Rodrigues Jordão2Domingos Sávio Campos Paciullo3Danielle Ferreira Baffa4Michele Gabriel Camilo5Universidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroInstituto Federal do MaranhãoEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteUniversidade Estadual do Norte Fluminense Darcy RibeiroUniversidade Estadual do Norte Fluminense Darcy RibeiroThe objective of this work was to evaluate the supply, morphological and chemical composition of forage, performance and milk composition of crossbred cows managed in Megathyrsus maximus cv. Tanzania in intermittent grazing system with fixed and variable defoliation intervals according to the interception of 95% of photosynthetically active radiation by the canopy. The experimental design was a randomized complete block design with two treatments and two area replications. In each grazing cycle the supply, morphological composition, forage nutritive value, dry matter intake, milk production and composition were determined. The experimental area was 4.0 hectares, divided into two blocks of 2 hectares. Each block was subdivided into 22 pickets (11 for each treatment) totaling 44 pickets with an area of 909 m2 each. Significant differences (P < 0.05) were observed for leaf blade content, in vitro digestibility of dry matter and forage crude protein, dry matter intake, individual and area milk production and lactose content milk, being the highest values found in the pastures managed with variable defoliation interval. Thus, the defoliation interval defined by the 95% interception of the photosynthetically luminosity leads to higher leaf blade proportions in the forage canopy, resulting in higher individual milk yield and per unit area, but with a loss of protein and total solids contents of milk.https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/37072Dairy cowsGrazingMilk yieldMegathyrsus maximus. |
| spellingShingle | Alberto Magno Fernandes Tadeu Silva Oliveira Alisson Rodrigues Jordão Domingos Sávio Campos Paciullo Danielle Ferreira Baffa Michele Gabriel Camilo Pasture characteristics and productive performance of dairy cows under two grazing management strategies Semina: Ciências Agrárias Dairy cows Grazing Milk yield Megathyrsus maximus. |
| title | Pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| title_full | Pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| title_fullStr | Pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| title_full_unstemmed | Pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| title_short | Pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| title_sort | pasture characteristics and productive performance of dairy cows under two grazing management strategies |
| topic | Dairy cows Grazing Milk yield Megathyrsus maximus. |
| url | https://ojs.uel.br/revistas/uel/index.php/semagrarias/article/view/37072 |
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