Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period
This study aimed to evaluate the agronomic characteristics and nutritional value of two clones of elephant grass (CNPGL 00-1-3 and BRS Kurumi) operating under rotational stocking in the dry season. A completely randomized design with repeated measures (grazing cycles) and three replicates (paddocks)...
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| Format: | Article |
| Language: | English |
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Universidade Estadual de Londrina
2017-11-01
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| Series: | Semina: Ciências Agrárias |
| Subjects: | |
| Online Access: | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/28850 |
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| author | Danilo Antonio Morenz Mirton José Frota Morenz Domingos Sávio Campos Paciullo Carlos Augusto de Miranda Gomide Francisco José da Silva Lédo Fernando César Ferraz Lopes |
| author_facet | Danilo Antonio Morenz Mirton José Frota Morenz Domingos Sávio Campos Paciullo Carlos Augusto de Miranda Gomide Francisco José da Silva Lédo Fernando César Ferraz Lopes |
| author_sort | Danilo Antonio Morenz |
| collection | DOAJ |
| description | This study aimed to evaluate the agronomic characteristics and nutritional value of two clones of elephant grass (CNPGL 00-1-3 and BRS Kurumi) operating under rotational stocking in the dry season. A completely randomized design with repeated measures (grazing cycles) and three replicates (paddocks) was used. Clones were managed under rotational stocking with a defoliation interval of 24 days and four days of occupation of paddocks, using Holstein x Gyr heifers with mean body weight of 150 kg. The evaluations were conducted in April/May, May/June, June/July and July/August 2010. Green forage mass was influenced by clone and grazing cycle, with higher mean value observed for CNPGL 03-01-00, which was 17% higher than the value observed for BRS Kurumi, and there was decreased of dry mass of green forage with the advance of grazing cycles. Leaf mass was influenced only by grazing cycle, with gradual reduction from the first to the third cycle. However, in fourth cycle was increase in biomass of leaves, which did not differ from that observed in the second cycle. There was interaction for dry matter production of stem, being observed differences in the first and third cycles for the clones. There was no effect of the factors studied for the production of senescent material. The leaf:stem ratio was influenced by grazing cycles, with interaction of the factors studied. The clone BRS Kurumi kept the leaf:stem ratio stable over the cycles, while clone CNPGL 1-3-00 presented a decrease in leaf:stem ratio from first until to third cycle. The content of crude protein (PB) was not influenced by the factors studied, with average values of 15.3% and 15.8% PB for the CNPGL 00-1-3 and BRS Kurumi clones. Neutral detergent fiber (NDF) and the in vitro dry matter digestibility (IVDMD) were affected only by grazing cycles. The highest values of NDF were observed in the three first grazing cycles, with values of 55.5%, 56.0% and 55.7% from the first to the third grazing cycle, respectively, while in the fourth cycle was obtained the value of 50.5%. There was a decrease in the IVDMD until the third cycle. In the fourth cycle the IVDMD values were similar to the first cycle. The clones did not differ in relation to biomass production, morphological composition and nutritional value, during the dry season. |
| first_indexed | 2024-12-20T04:54:11Z |
| format | Article |
| id | doaj.art-649913defaf84fca923740cea731b039 |
| institution | Directory Open Access Journal |
| issn | 1676-546X 1679-0359 |
| language | English |
| last_indexed | 2024-12-20T04:54:11Z |
| publishDate | 2017-11-01 |
| publisher | Universidade Estadual de Londrina |
| record_format | Article |
| series | Semina: Ciências Agrárias |
| spelling | doaj.art-649913defaf84fca923740cea731b0392022-12-21T19:52:46ZengUniversidade Estadual de LondrinaSemina: Ciências Agrárias1676-546X1679-03592017-11-013863817382810.5433/1679-0359.2017v38n6p381716475Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry periodDanilo Antonio Morenz0Mirton José Frota Morenz1Domingos Sávio Campos Paciullo2Carlos Augusto de Miranda Gomide3Francisco José da Silva Lédo4Fernando César Ferraz Lopes5Universidade Federal Rural do Rio de JaneiroEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteEmpresa Brasileira de Pesquisa Agropecuária, EMBRAPA Gado de LeiteThis study aimed to evaluate the agronomic characteristics and nutritional value of two clones of elephant grass (CNPGL 00-1-3 and BRS Kurumi) operating under rotational stocking in the dry season. A completely randomized design with repeated measures (grazing cycles) and three replicates (paddocks) was used. Clones were managed under rotational stocking with a defoliation interval of 24 days and four days of occupation of paddocks, using Holstein x Gyr heifers with mean body weight of 150 kg. The evaluations were conducted in April/May, May/June, June/July and July/August 2010. Green forage mass was influenced by clone and grazing cycle, with higher mean value observed for CNPGL 03-01-00, which was 17% higher than the value observed for BRS Kurumi, and there was decreased of dry mass of green forage with the advance of grazing cycles. Leaf mass was influenced only by grazing cycle, with gradual reduction from the first to the third cycle. However, in fourth cycle was increase in biomass of leaves, which did not differ from that observed in the second cycle. There was interaction for dry matter production of stem, being observed differences in the first and third cycles for the clones. There was no effect of the factors studied for the production of senescent material. The leaf:stem ratio was influenced by grazing cycles, with interaction of the factors studied. The clone BRS Kurumi kept the leaf:stem ratio stable over the cycles, while clone CNPGL 1-3-00 presented a decrease in leaf:stem ratio from first until to third cycle. The content of crude protein (PB) was not influenced by the factors studied, with average values of 15.3% and 15.8% PB for the CNPGL 00-1-3 and BRS Kurumi clones. Neutral detergent fiber (NDF) and the in vitro dry matter digestibility (IVDMD) were affected only by grazing cycles. The highest values of NDF were observed in the three first grazing cycles, with values of 55.5%, 56.0% and 55.7% from the first to the third grazing cycle, respectively, while in the fourth cycle was obtained the value of 50.5%. There was a decrease in the IVDMD until the third cycle. In the fourth cycle the IVDMD values were similar to the first cycle. The clones did not differ in relation to biomass production, morphological composition and nutritional value, during the dry season.http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/28850Composição morfológicaComposição químicaMassa de forragemProteína bruta. |
| spellingShingle | Danilo Antonio Morenz Mirton José Frota Morenz Domingos Sávio Campos Paciullo Carlos Augusto de Miranda Gomide Francisco José da Silva Lédo Fernando César Ferraz Lopes Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period Semina: Ciências Agrárias Composição morfológica Composição química Massa de forragem Proteína bruta. |
| title | Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| title_full | Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| title_fullStr | Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| title_full_unstemmed | Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| title_short | Agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| title_sort | agronomic characteristics and nutritive value of elephant grass clones managed under rotational stocking during the dry period |
| topic | Composição morfológica Composição química Massa de forragem Proteína bruta. |
| url | http://www.uel.br/revistas/uel/index.php/semagrarias/article/view/28850 |
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