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| 12. |  | FREITAS, A. A. de F.; BEZERRA, F. M. L. Efeitos do déficit hídrico na qualidade dos frutos e produtividade da melancia. Horticultura Brasileira, Brasília, v. 21, n. 2, jul. 2003. Suplemento 2. Trabalho apresentado no 43º Congresso Brasileiro de Olericultura, 2003. Publicado também como resumo em: Horticultura Brasileira, Brasília, v. 21, n. 2, p. 345, jul. 2003. Suplemento 1.| Biblioteca(s): Embrapa Hortaliças. |
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| Registros recuperados : 74 | |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
11/09/2020 |
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Data da última atualização: |
01/12/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
B - 3 |
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Autoria: |
LOPES, M. N.; CÂNDIDO, M. J. D.; POMPEU, R. C. F. F.; SILVA, R. G. da; LACERDA, C. F. de; BEZERRA, F. M. L. |
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Afiliação: |
MARCOS NEVES LOPES, Federal Institute of Education, Science and Technology of Piauí (IFPI) - Valença of Piauí, PI, Brazil; MAGNO JOSÉ DUARTE CÂNDIDO, Federal University of Ceará (UFC) - Fortaleza, CE, Brazil; ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC; RODRIGO GREGÓRIO DA SILVA, Federal Institute of Education, Science and Technology of Ceará (IFCE) - Limoeiro do Norte, CE, Brazil; CLAUDIVAN FEITOSA DE LACERDA, Federal University of Ceará (UFC) - Fortaleza, CE, Brazil; FRANCISCO MARCUS LIMA BEZERRA, University of São Paulo, E.S.A. Luiz de Queiroz (USP-ESALQ) - Piracicaba, SP, Brazil. |
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Título: |
Yield and chemical composition of massai grass fertilized with nitrogen. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
International Journal of Agriculture and Natural Resources, v. 47, n. 2, p. 69-78, 2020. |
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DOI: |
http://dx.doi.org/10.7764/ijanr.v47i2.2068 |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Nitrogen fertilization, in addition to increasing biomass production, can also positively influence the chemical composition of a forage plant. The aim of this research was to evaluate the yield and chemical composition of Megathyrsus maximus cv. Massai grass under five nitrogen fertilization levels (0, 150, 300, 450 and 600 mg N dm-3 soil, equivalent to 0, 300, 600, 900 and 1,200 kg ha-1 year-1, respectively) and during growth cycles (establishment and regrowth cycles) in a greenhouse. A completely randomized design with split-plot arrangement was adopted in which the five nitrogen levels were the plots and the cycles were the subplots. The total forage biomass increased with the nitrogen fertilization levels in the three growth cycles (28.4 g pot-1, 32.0 g pot-1 and 29.8 g pot-1 for establishment, regrowth 1 and regrowth 2, respectively, at the level of 600 mg N dm-3), and it was reduced from establishment to regrowth at lower N levels. The dry matter content was not affected by the N levels. However, this content presented higher values at the regrowth cycle in comparison to the establishment cycle. The crude protein (CP) content increased (7.0% CP at the level of 600 mg N dm-3), while the neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HEM) contents all decreased at higher N levels, with the highest CP content being observed at the establishment, and the opposite occurring for NDF, ADF and HEM. Nitrogen fertilization provides positive responses on yield and chemical composition of massai grass. [Productividad y composición química del pasto massai fertilizado con nitrógeno]. La fertilización nitrogenada, además de incrementar la producción de biomasa, también puede influenciar positivamente en la composición química de la planta forrajera. El objetivo de este estudio fue evaluar la productividad y la composición química del Megathyrsus maximus cv. Massai durante el establecimiento y rebrote en invernadero bajo cinco dosis de nitrógeno (0, 150, 300, 450 y 600 mg N dm-3 de suelo). Se adoptó un diseño completamente aleatorio, en arreglo de parcelas subdivididas, siendo las dosis de nitrógeno asignadas en las parcelas y los ciclos, en las subparcelas. La biomasa de forraje total fue incrementada con las dosis de nitrógeno en los tres ciclos de crecimiento (28,4 g vaso-1, 32,0 g vaso-1 y 29,8 g vaso-1 para el establecimiento, rebrote 1 y rebrote 2, respectivamente, en la dosis de 600 mg N dm-3) y fue reducida de forma más expresiva del establecimiento para los rebrotes en las menores dosis de N. El contenido de materia seca no fue influenciado por las dosis de N, sin embargo, reveló mayor valor en el rebrote con relación al establecimiento. El contenido de proteína bruta (PB) fue incrementado (7,0% en la dosis de 600 mg N dm-3 de suelo) y los contenidos de fibra en detergente neutro (FDN), de fibra en detergente ácido (FDA) y de hemicelulosa (HEM) fueron reducidos en las mayores dosis de N, con el contenido de PB siendo superior en el establecimiento y el inverso ocurriendo para los contenidos de FDN, FDA y HEM. La fertilización nitrogenada proporciona respuestas positivas en la productividad y composición química del pasto-massai. MenosAbstract: Nitrogen fertilization, in addition to increasing biomass production, can also positively influence the chemical composition of a forage plant. The aim of this research was to evaluate the yield and chemical composition of Megathyrsus maximus cv. Massai grass under five nitrogen fertilization levels (0, 150, 300, 450 and 600 mg N dm-3 soil, equivalent to 0, 300, 600, 900 and 1,200 kg ha-1 year-1, respectively) and during growth cycles (establishment and regrowth cycles) in a greenhouse. A completely randomized design with split-plot arrangement was adopted in which the five nitrogen levels were the plots and the cycles were the subplots. The total forage biomass increased with the nitrogen fertilization levels in the three growth cycles (28.4 g pot-1, 32.0 g pot-1 and 29.8 g pot-1 for establishment, regrowth 1 and regrowth 2, respectively, at the level of 600 mg N dm-3), and it was reduced from establishment to regrowth at lower N levels. The dry matter content was not affected by the N levels. However, this content presented higher values at the regrowth cycle in comparison to the establishment cycle. The crude protein (CP) content increased (7.0% CP at the level of 600 mg N dm-3), while the neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HEM) contents all decreased at higher N levels, with the highest CP content being observed at the establishment, and the opposite occurring for NDF, ADF and HEM. Nitrogen fertilization provides positi... Mostrar Tudo |
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Palavras-Chave: |
Capim Massai; Forage biomass; Nitrogen fertilization; Produção de biomassa; Semiárido. |
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Thesagro: |
Composição Química; Fertilizante Nitrogenado; Forragem; Gramínea Forrageira; Nitrogênio; Planta Forrageira; Proteína Bruta. |
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Thesaurus NAL: |
Biomass production; Brazil; Crude protein; Dry matter content; Forage and feed science; Megathyrsus maximus; Neutral detergent fiber; Nitrogen fertilizers; Semiarid soils. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 04599naa a2200445 a 4500
001 2124866
005 2020-12-01
008 2020 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.7764/ijanr.v47i2.2068$2DOI
100 1 $aLOPES, M. N.
245 $aYield and chemical composition of massai grass fertilized with nitrogen.$h[electronic resource]
260 $c2020
520 $aAbstract: Nitrogen fertilization, in addition to increasing biomass production, can also positively influence the chemical composition of a forage plant. The aim of this research was to evaluate the yield and chemical composition of Megathyrsus maximus cv. Massai grass under five nitrogen fertilization levels (0, 150, 300, 450 and 600 mg N dm-3 soil, equivalent to 0, 300, 600, 900 and 1,200 kg ha-1 year-1, respectively) and during growth cycles (establishment and regrowth cycles) in a greenhouse. A completely randomized design with split-plot arrangement was adopted in which the five nitrogen levels were the plots and the cycles were the subplots. The total forage biomass increased with the nitrogen fertilization levels in the three growth cycles (28.4 g pot-1, 32.0 g pot-1 and 29.8 g pot-1 for establishment, regrowth 1 and regrowth 2, respectively, at the level of 600 mg N dm-3), and it was reduced from establishment to regrowth at lower N levels. The dry matter content was not affected by the N levels. However, this content presented higher values at the regrowth cycle in comparison to the establishment cycle. The crude protein (CP) content increased (7.0% CP at the level of 600 mg N dm-3), while the neutral detergent fiber (NDF), acid detergent fiber (ADF) and hemicellulose (HEM) contents all decreased at higher N levels, with the highest CP content being observed at the establishment, and the opposite occurring for NDF, ADF and HEM. Nitrogen fertilization provides positive responses on yield and chemical composition of massai grass. [Productividad y composición química del pasto massai fertilizado con nitrógeno]. La fertilización nitrogenada, además de incrementar la producción de biomasa, también puede influenciar positivamente en la composición química de la planta forrajera. El objetivo de este estudio fue evaluar la productividad y la composición química del Megathyrsus maximus cv. Massai durante el establecimiento y rebrote en invernadero bajo cinco dosis de nitrógeno (0, 150, 300, 450 y 600 mg N dm-3 de suelo). Se adoptó un diseño completamente aleatorio, en arreglo de parcelas subdivididas, siendo las dosis de nitrógeno asignadas en las parcelas y los ciclos, en las subparcelas. La biomasa de forraje total fue incrementada con las dosis de nitrógeno en los tres ciclos de crecimiento (28,4 g vaso-1, 32,0 g vaso-1 y 29,8 g vaso-1 para el establecimiento, rebrote 1 y rebrote 2, respectivamente, en la dosis de 600 mg N dm-3) y fue reducida de forma más expresiva del establecimiento para los rebrotes en las menores dosis de N. El contenido de materia seca no fue influenciado por las dosis de N, sin embargo, reveló mayor valor en el rebrote con relación al establecimiento. El contenido de proteína bruta (PB) fue incrementado (7,0% en la dosis de 600 mg N dm-3 de suelo) y los contenidos de fibra en detergente neutro (FDN), de fibra en detergente ácido (FDA) y de hemicelulosa (HEM) fueron reducidos en las mayores dosis de N, con el contenido de PB siendo superior en el establecimiento y el inverso ocurriendo para los contenidos de FDN, FDA y HEM. La fertilización nitrogenada proporciona respuestas positivas en la productividad y composición química del pasto-massai.
650 $aBiomass production
650 $aBrazil
650 $aCrude protein
650 $aDry matter content
650 $aForage and feed science
650 $aMegathyrsus maximus
650 $aNeutral detergent fiber
650 $aNitrogen fertilizers
650 $aSemiarid soils
650 $aComposição Química
650 $aFertilizante Nitrogenado
650 $aForragem
650 $aGramínea Forrageira
650 $aNitrogênio
650 $aPlanta Forrageira
650 $aProteína Bruta
653 $aCapim Massai
653 $aForage biomass
653 $aNitrogen fertilization
653 $aProdução de biomassa
653 $aSemiárido
700 1 $aCÂNDIDO, M. J. D.
700 1 $aPOMPEU, R. C. F. F.
700 1 $aSILVA, R. G. da
700 1 $aLACERDA, C. F. de
700 1 $aBEZERRA, F. M. L.
773 $tInternational Journal of Agriculture and Natural Resources$gv. 47, n. 2, p. 69-78, 2020.
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