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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Corte. |
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Data corrente: |
07/11/2017 |
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Data da última atualização: |
13/01/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
EUCLIDES, V. P. B.; CARPEJANI, G. C.; MONTAGNER, D. B.; NASCIMENTO JUNIOR, D.; BARBOSA, R. A.; DIFANTE, G. S. |
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Afiliação: |
VALERIA PACHECO BATISTA EUCLIDES, CNPGC; Federal University of Mato Grosso do Sul, Campo Grande, MS, Brazil; DENISE BAPTAGLIN MONTAGNER, CNPGC; Federal University of Viçosa, Viçosa, MG, Brazil; RODRIGO AMORIM BARBOSA, CNPGC; Federal University of Rio Grande do Norte, Natal, RN, Brazil. |
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Título: |
Maintaining post-grazing sward height of Panicum maximum (cv. Mombaça) at 50 cm led to higher animal performance compared with post-grazing height of 30 cm. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
Grass and Forage Science, v. 73, n. 1, p. 174-182, March 2018. |
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ISSN: |
1365-2494 |
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DOI: |
10.1111/gfs.12292 |
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Idioma: |
Inglês |
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Conteúdo: |
In swards of tall, tufted, tropical grasses like Mombaça guinea grass (Panicum maximum (Jacq.)), post-grazing heights promote changes in sward structure, which influence animal performance. This study evaluated changes in sward structure in response to grazing management at two post-grazing heights (30 and 50 cm), associated ith 90 cm pre-grazing height. Each treatment was allocated to experimental unit (1.5 ha) in three replicated blocks. Pastures were evaluated pre- and post-grazing to estimate herbage mass, percentages of leaf (LP), stem (SP) and dead material (DP), and nutritive value (VN). Stocking rate was adjusted twice a week “using the put-and-take approach,” and animals were weighed every 28 days. Forage accumulation rate was greater for pasture managed at 30 cm (64.8 vs. 55.1 kg ha -1 day -1) than 50 cm. A greater number of days were required after grazing 30-cm residual pasture to achieve the pre-grazing target height, resulting in 25% decrease in number of grazing cycles compared with pastures managed at 50 cm. Regardless of post-grazing height targets, SP and DP decreased, whereas LP and NV increased from soil level to top of canopy. Stocking rate was greater in pastures managed to 30 cm than in those managed to 50 cm residual height (4.7 vs. 3.4 AU ha -1). However, average daily gain was greater for 50 cm than for 30 cm post-grazing height (795 vs. 590 g steer -1 day -1), resulting in a greater animal production per area (917 vs. 794 kg/ha of live weight). Thus, Mombaça guinea grass subject to intermittent grazing should be managed at 50 cm residual height. MenosIn swards of tall, tufted, tropical grasses like Mombaça guinea grass (Panicum maximum (Jacq.)), post-grazing heights promote changes in sward structure, which influence animal performance. This study evaluated changes in sward structure in response to grazing management at two post-grazing heights (30 and 50 cm), associated ith 90 cm pre-grazing height. Each treatment was allocated to experimental unit (1.5 ha) in three replicated blocks. Pastures were evaluated pre- and post-grazing to estimate herbage mass, percentages of leaf (LP), stem (SP) and dead material (DP), and nutritive value (VN). Stocking rate was adjusted twice a week “using the put-and-take approach,” and animals were weighed every 28 days. Forage accumulation rate was greater for pasture managed at 30 cm (64.8 vs. 55.1 kg ha -1 day -1) than 50 cm. A greater number of days were required after grazing 30-cm residual pasture to achieve the pre-grazing target height, resulting in 25% decrease in number of grazing cycles compared with pastures managed at 50 cm. Regardless of post-grazing height targets, SP and DP decreased, whereas LP and NV increased from soil level to top of canopy. Stocking rate was greater in pastures managed to 30 cm than in those managed to 50 cm residual height (4.7 vs. 3.4 AU ha -1). However, average daily gain was greater for 50 cm than for 30 cm post-grazing height (795 vs. 590 g steer -1 day -1), resulting in a greater animal production per area (917 vs. 794 kg/ha of live weight). Thu... Mostrar Tudo |
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Palavras-Chave: |
Guinea grass. |
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Thesaurus Nal: |
Animal performance; Forage; Nutritive value. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/208646/1/Maintaining-post-grazing-sward.pdf
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Marc: |
LEADER 02425naa a2200253 a 4500
001 2079003
005 2020-01-13
008 2018 bl uuuu u00u1 u #d
022 $a1365-2494
024 7 $a10.1111/gfs.12292$2DOI
100 1 $aEUCLIDES, V. P. B.
245 $aMaintaining post-grazing sward height of Panicum maximum (cv. Mombaça) at 50 cm led to higher animal performance compared with post-grazing height of 30 cm.$h[electronic resource]
260 $c2018
520 $aIn swards of tall, tufted, tropical grasses like Mombaça guinea grass (Panicum maximum (Jacq.)), post-grazing heights promote changes in sward structure, which influence animal performance. This study evaluated changes in sward structure in response to grazing management at two post-grazing heights (30 and 50 cm), associated ith 90 cm pre-grazing height. Each treatment was allocated to experimental unit (1.5 ha) in three replicated blocks. Pastures were evaluated pre- and post-grazing to estimate herbage mass, percentages of leaf (LP), stem (SP) and dead material (DP), and nutritive value (VN). Stocking rate was adjusted twice a week “using the put-and-take approach,” and animals were weighed every 28 days. Forage accumulation rate was greater for pasture managed at 30 cm (64.8 vs. 55.1 kg ha -1 day -1) than 50 cm. A greater number of days were required after grazing 30-cm residual pasture to achieve the pre-grazing target height, resulting in 25% decrease in number of grazing cycles compared with pastures managed at 50 cm. Regardless of post-grazing height targets, SP and DP decreased, whereas LP and NV increased from soil level to top of canopy. Stocking rate was greater in pastures managed to 30 cm than in those managed to 50 cm residual height (4.7 vs. 3.4 AU ha -1). However, average daily gain was greater for 50 cm than for 30 cm post-grazing height (795 vs. 590 g steer -1 day -1), resulting in a greater animal production per area (917 vs. 794 kg/ha of live weight). Thus, Mombaça guinea grass subject to intermittent grazing should be managed at 50 cm residual height.
650 $aAnimal performance
650 $aForage
650 $aNutritive value
653 $aGuinea grass
700 1 $aCARPEJANI, G. C.
700 1 $aMONTAGNER, D. B.
700 1 $aNASCIMENTO JUNIOR, D.
700 1 $aBARBOSA, R. A.
700 1 $aDIFANTE, G. S.
773 $tGrass and Forage Science$gv. 73, n. 1, p. 174-182, March 2018.
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Registro original: |
Embrapa Gado de Corte (CNPGC) |
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Biblioteca(s): |
Embrapa Café. |
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Data corrente: |
25/08/2022 |
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Data da última atualização: |
11/01/2023 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 1 |
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Autoria: |
SENRA, J. F. B.; SILVA, J. A. da; FERRAO, M. A. G.; ESPOSTI, M. D. D.; MILHEIROS, I. S.; FASSARELLA, K. M. |
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Afiliação: |
JOÃO FELIPE BRITES SENRA, INSTITUTO CAPIXABA DE PESQUISA ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL; JOSIMAR ALEIXO DA SILVA, INSTITUTO CAPIXABA DE PESQUISA ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL; MARIA AMELIA GAVA FERRAO, CNPCa; MARLON DUTRA DEGLI ESPOSTI, INSTITUTO CAPIXABA DE PESQUISA ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL; IDALINA STURIÃO MILHEIROS, INSTITUTO CAPIXABA DE PESQUISA ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL; KAMILA MACHADO FASSARELLA, INSTITUTO CAPIXABA DE PESQUISA ASSISTÊNCIA TÉCNICA E EXTENSÃO RURAL. |
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Título: |
Genetic variability of conilon coffee population from cultivar 'ES8152' based on morphoagronomic variables. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Coffee Science, v. 17, e171986, 2022. |
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Páginas: |
9 p. |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed to analyze the genetic variability of Coffea canephora population with 190 genotypes from cultivar ?ES8152?, based on morphoagronomic characteristics and vegetation index, to identify the most important characteristics for genetic divergence and compare them with commercial clones. The experiment was installed, in 2019, at the Bananal do Norte Experimental Farm/INCAPER, Cachoeiro de Itapemirim, ES, Brazil. The experiment was carried out in Federer?s augmented block design with three blocks, four common treatments (commercial clones A1, LB1, V8 and V12) and 190 regular treatments, genotypes from the seed production field of the conilon coffee cultivar ?ES8152?. At 24 months of age 14 morphoagronomic characteristics and vegetation index were evaluated. Descriptive analysis of the data, the estimation of the Standardized Euclidean Distance (ED) followed by the grouping by the methods of Tocher, UPGMA and principal coordinates, in addition to the relative importance of the characters estimated by the Singh methodology were performed. The most distant genotypes were 62 and 83 (ED=2.620) and the closest were 42 and 160 (ED=0.208). Genotype 83 stood out as the most distant among the others. The optimization and hierarchical groupings allowed the identification of genotypes 15, 81, 107 and 184 as similar to commercial clones. The discard analysis of variables recommended the elimination of the vegetation index and average internode length of the next diversity analysis. Principal coordinate analysis found phenotypic similarity of the genotypes 30, 81, 115, 141 and 163 with the clone V12, of the genotype 119 with the clone A1 and genotype 17 with clone LB1. The study, of morphoagronomic characters, allowed to detection the genetic diversity existing in the materials evaluated, indicating those with phenotypic similarity with the commercial clones, being possible the early identification of promising genotypes, agronomically superior, to start a breeding program for clonal selection, recurrent selection and controlled crosses to maximize heterosis. MenosThis study aimed to analyze the genetic variability of Coffea canephora population with 190 genotypes from cultivar ?ES8152?, based on morphoagronomic characteristics and vegetation index, to identify the most important characteristics for genetic divergence and compare them with commercial clones. The experiment was installed, in 2019, at the Bananal do Norte Experimental Farm/INCAPER, Cachoeiro de Itapemirim, ES, Brazil. The experiment was carried out in Federer?s augmented block design with three blocks, four common treatments (commercial clones A1, LB1, V8 and V12) and 190 regular treatments, genotypes from the seed production field of the conilon coffee cultivar ?ES8152?. At 24 months of age 14 morphoagronomic characteristics and vegetation index were evaluated. Descriptive analysis of the data, the estimation of the Standardized Euclidean Distance (ED) followed by the grouping by the methods of Tocher, UPGMA and principal coordinates, in addition to the relative importance of the characters estimated by the Singh methodology were performed. The most distant genotypes were 62 and 83 (ED=2.620) and the closest were 42 and 160 (ED=0.208). Genotype 83 stood out as the most distant among the others. The optimization and hierarchical groupings allowed the identification of genotypes 15, 81, 107 and 184 as similar to commercial clones. The discard analysis of variables recommended the elimination of the vegetation index and average internode length of the next diversity analy... Mostrar Tudo |
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Thesagro: |
Coffea Canephora; Variação Genética; Variedade. |
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Thesaurus NAL: |
Genotype; Plant breeding; Plant selection guides. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1145732/1/Genetic-variability-of-conilon-coffee-population-from-cultivar.pdf
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Marc: |
LEADER 02862naa a2200265 a 4500
001 2145732
005 2023-01-11
008 2022 bl uuuu u00u1 u #d
100 1 $aSENRA, J. F. B.
245 $aGenetic variability of conilon coffee population from cultivar 'ES8152' based on morphoagronomic variables.$h[electronic resource]
260 $c2022
300 $a9 p.
520 $aThis study aimed to analyze the genetic variability of Coffea canephora population with 190 genotypes from cultivar ?ES8152?, based on morphoagronomic characteristics and vegetation index, to identify the most important characteristics for genetic divergence and compare them with commercial clones. The experiment was installed, in 2019, at the Bananal do Norte Experimental Farm/INCAPER, Cachoeiro de Itapemirim, ES, Brazil. The experiment was carried out in Federer?s augmented block design with three blocks, four common treatments (commercial clones A1, LB1, V8 and V12) and 190 regular treatments, genotypes from the seed production field of the conilon coffee cultivar ?ES8152?. At 24 months of age 14 morphoagronomic characteristics and vegetation index were evaluated. Descriptive analysis of the data, the estimation of the Standardized Euclidean Distance (ED) followed by the grouping by the methods of Tocher, UPGMA and principal coordinates, in addition to the relative importance of the characters estimated by the Singh methodology were performed. The most distant genotypes were 62 and 83 (ED=2.620) and the closest were 42 and 160 (ED=0.208). Genotype 83 stood out as the most distant among the others. The optimization and hierarchical groupings allowed the identification of genotypes 15, 81, 107 and 184 as similar to commercial clones. The discard analysis of variables recommended the elimination of the vegetation index and average internode length of the next diversity analysis. Principal coordinate analysis found phenotypic similarity of the genotypes 30, 81, 115, 141 and 163 with the clone V12, of the genotype 119 with the clone A1 and genotype 17 with clone LB1. The study, of morphoagronomic characters, allowed to detection the genetic diversity existing in the materials evaluated, indicating those with phenotypic similarity with the commercial clones, being possible the early identification of promising genotypes, agronomically superior, to start a breeding program for clonal selection, recurrent selection and controlled crosses to maximize heterosis.
650 $aGenotype
650 $aPlant breeding
650 $aPlant selection guides
650 $aCoffea Canephora
650 $aVariação Genética
650 $aVariedade
700 1 $aSILVA, J. A. da
700 1 $aFERRAO, M. A. G.
700 1 $aESPOSTI, M. D. D.
700 1 $aMILHEIROS, I. S.
700 1 $aFASSARELLA, K. M.
773 $tCoffee Science$gv. 17, e171986, 2022.
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Registro original: |
Embrapa Café (CNPCa) |
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