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Previous issue date: 2018-05-30 / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior / The objective of this work was to identify perennial forage grasses, which are potentially capable of producing large amounts of dry matter at different times of the year under the edaphoclimatic conditions of Manaus, AM. The experiment was carried out in the experimental field of Embrapa Western Amazon. The treatments corresponded to the eleven cultivars, which were cut in two intervals (28 and 42 days), with three replicates, totaling 66 experimental units. The experimental units of 16 m2 (4m x 4m), with spacing between plots of 2 m, were established through sowing in April 2016, in factorial arrangement, following a completely randomized design. The samples were obtained by harvesting a plot of the plot measuring 3m x 1m with recommended cutting height according to each cultivar, using a mower-mower with 1 m wide cutting bar. The forage was heavy green in the field as well as a sub-sample of approximately 1 kg. This sub-sample was dried in a forced circulation air oven at 65 ° C until constant weight, weighing again to determine the dry mass contente. The contents were used to determine the forage mass (MF) for each sample, being considered equal to the accumulation of forage (AF). At the end of the experiment, the AFs referring to each regrowth were added to obtain the total forage accumulation (AFT) for each plot. The data were grouped in two periods: rainy season and dry season, generating the seasonal forage accumulations, rainy season (AFpc) and dry period (AFps). From these were also generated the values of seasonal distribution of dry period and the rainy season, as a proportion of the total annual distribution (AFpc / AFps), dividing AFpc and AFps by AFT. The cultivars Mombaça and Massai are the most recommended for the edaphoclimatic conditions of Manaus, AM because their yields are very high in comparison to the others. The cultivar Tupi is a good alternative for pasture formation in the climatic conditions of Manaus due to the fact that it does not present the seasonality effect and its high production. In the cut-off interval of 42 days the cultivars obtained higher forage production in the soil and climatic conditions of Manaus, AM. / The objective of this work was to identify perennial forage grasses, which are potentially capable of producing large amounts of dry matter at different times of the year under the edaphoclimatic conditions of Manaus, AM. The experiment was carried out in the experimental field of Embrapa Western Amazon. The treatments corresponded to the eleven cultivars, which were cut in two intervals (28 and 42 days), with three replicates, totaling 66 experimental units. The experimental units of 16 m2 (4m x 4m), with spacing between plots of 2 m, were established through sowing in April 2016, in factorial arrangement, following a completely randomized design. The samples were obtained by harvesting a plot of the plot measuring 3m x 1m with recommended cutting height according to each cultivar, using a mower-mower with 1 m wide cutting bar. The forage was heavy green in the field as well as a sub-sample of approximately 1 kg. This sub-sample was dried in a forced circulation air oven at 65 ° C until constant weight, weighing again to determine the dry mass contente. The contents were used to determine the forage mass (MF) for each sample, being considered equal to the accumulation of forage (AF). At the end of the experiment, the AFs referring to each regrowth were added to obtain the total forage accumulation (AFT) for each plot. The data were grouped in two periods: rainy season and dry season, generating the seasonal forage accumulations, rainy season (AFpc) and dry period (AFps). From these were also generated the values of seasonal distribution of dry period and the rainy season, as a proportion of the total annual distribution (AFpc / AFps), dividing AFpc and AFps by AFT. The cultivars Mombaça and Massai are the most recommended for the edaphoclimatic conditions of Manaus, AM because their yields are very high in comparison to the others. The cultivar Tupi is a good alternative for pasture formation in the climatic conditions of Manaus due to the fact that it does not present the seasonality effect and its high production. In the cut-off interval of 42 days the cultivars obtained higher forage production in the soil and climatic conditions of Manaus, AM. / O objetivo deste trabalho foi identificar cultivares de gramíneas forrageiras perenes, que sejam potencialmente capazes de produzir matéria seca em grande quantidade nas diferentes épocas do ano nas condições edafoclimáticas de Manaus, AM. O experimento foi realizado no campo experimental da Embrapa Amazônia Ocidental. Os tratamentos corresponderam às onze cultivares, as quais foram cortadas em dois intervalos (28 e 42 dias), com três repetições, totalizando 66 unidades experimentais. As unidades experimentais de 16 m2 (4m x 4m), com espaçamento entre as parcelas de 2 m, foram estabelecidas através de semeaduras em abril de 2016, em arranjo fatorial, seguindo um delineamento inteiramente casualizado. As amostras foram obtidas colhendo-se uma faixa da parcela medindo 3m x 1m com altura de corte recomendada de acordo com cada cultivar, empregando-se uma moto-segadora com barra de corte de 1 m de largura. A forragem foi pesada verde no campo assim como uma subamostra de aproximadamente 1 kg. Essa subamostra foi seca em estufa de circulação de ar forçado a 65 °C até peso constante, pesada novamente para determinação do teor de massa seca. Os teores foram usados na determinação da massa de forragem (MF) relativa a cada amostragem, sendo esta considerada igual ao acúmulo de forragem (AF). Ao final do experimento, os AFs referentes a cada rebrota foram somados para a obtenção do acúmulo total de forragem (AFT) referente a cada parcela. Os dados foram agrupados em dois períodos: período chuvoso e período seco, gerando os acúmulos de forragem estacionais, período chuvoso (AFpc) no período seco (AFps). A partir destes foram gerados ainda os valores de distribuição estacional de período seco e do período chuvoso, como proporção da distribuição anual total (AFpc/AFps), dividindo-se os AFpc e AFps pelo AFT. As cultivares Mombaça e Massai são as mais recomendadas para as condições edafoclimáticas de Manaus, AM pelas suas produções serem bem elevadas em comparação às demais. A cultivar Tupi é uma boa alternativa para formação de pastagem nas condições climáticas de Manaus pelo fato de quase não apresentar o efeito de estacionalidade e pela sua produção elevada. No intervalo de corte de 42 dias as cultivares obtiveram maior produção de forragem nas condições edafoclimáticas de Manaus, AM.
| Identifer | oai:union.ndltd.org:IBICT/oai:http://localhost:tede/6523 |
| Date | 30 May 2018 |
| Creators | Souza, José Alexandre Siqueira de, 92-99209-4080 |
| Contributors | agronomiatropical@ufam.edu.br, Chaves, Francisco Célio Maia, Tonato, Felipe, Perin, Rogério, Pereira, Expedita Maria de Oliveira |
| Publisher | Universidade Federal do Amazonas, Programa de Pós-graduação em Agronomia Tropical, UFAM, Brasil, Faculdade de Ciências Agrárias |
| Source Sets | IBICT Brazilian ETDs |
| Language | Portuguese |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, info:eu-repo/semantics/masterThesis |
| Format | application/pdf |
| Source | reponame:Biblioteca Digital de Teses e Dissertações da UFAM, instname:Universidade Federal do Amazonas, instacron:UFAM |
| Rights | http://creativecommons.org/licenses/by-nc-nd/4.0/, info:eu-repo/semantics/openAccess |
| Relation | -7597927524659854503, 500 |
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