Nitrogen and carbohydrate fractions in exclusive Tifton 85 and in pasture oversown with annual winter forage species
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Data
2012-03-01
Autores
Moreira, Andréia Luciane
Reis, Ricardo Andrade [UNESP]
Simili, Flávia Fernanda
Gomide, Carlos Augusto de Miranda
Ruggieri, Ana Claudia [UNESP]
Berchielli, Telma Teresinha [UNESP]
Título da Revista
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Editor
Editora da Universidade Estadual de Maringá (EDUEM)
Resumo
O experimento foi conduzido na FCAV - Campus de Jaboticabal, no período de inverno-primavera-verão de 2001-2002, com o objetivo de determinar o fracionamento de compostos nitrogenados e de carboidratos do Tifton 85 (Cynodon nlemfuensis Vanderyst x Cynodon dactylon (L.) Pers), exclusivo ou sobressemeado com forrageiras anuais de inverno. Os tratamentos testados foram: aveia preta (Avena strigosa Schreb); aveia amarela (Avena byzantina C. Koch); triticale (X Triticosecale Wittmack); aveia preta + aveia amarela; aveia preta + triticale; aveia amarela + triticale; aveia preta + aveia amarela + triticale, sobressemeados sobre Tifton 85 e, sem consorciação (testemunha). O delineamento experimental utilizado foi o de blocos completos ao acaso, com três repetições. O corte das forrageiras foi realizado a 20 cm de altura (presença de forrageiras de inverno) e 10 cm de altura (ausência das forrageiras de inverno). Foram determinados os teores de proteína bruta, carboidratos totais, e o fracionamento dos compostos nitrogenados e de carboidratos. Houve redução nos teores dos compostos químicos das espécies de forrageiras de inverno e no Tifton 85 ao longo dos períodos de avaliações. Os conteúdos de compostos nitrogenados e de carboidratos apresentaram grande variação durante os períodos avaliados, relacionando com as características morfológicas das espécies de gramineas e com a composição botânica das pastagens.
The experiment was undertaken at the Faculty of Agrarian and Veterinary Sciences (FCAV) Jaboticabal, São Paulo State, Brazil, during winter-spring-summer of 2001-2002, to determine the fractionation of nitrogen and carbohydrates in Tifton 85 (Cynodon dactylon Vanderyst x Cynodon nlemfuensis (L.) Pers), exclusively or oversown with winter annual forage species. Treatments comprised bristle oat (Avena strigosa Schreb), yellow oat (Avena byzantina C. Koch), triticale (X Triticosecale Wittmack), bristle oat + yellow oat, bristle oat + triticale, yellow oat + triticale, bristle oat + yellow oat + triticale seeded in Tifton 85 and sole crop (control). Experimental design was composed of completely randomized blocks with three replications. Fodder was cut 20 cm high (presence of winter forage) and 10 cm high (Tifton 85 pasture). Crude protein, total carbohydrate and the fractions of nitrogen compounds and carbohydrates were determined. Decrease was reported in the levels of chemical compounds in winter forage species and in Tifton 85 during the evaluation periods. The content of nitrogen compounds and carbohydrates varied widely during the evaluation period according to the morphological characteristics of grass species and botanical composition of pastures.
The experiment was undertaken at the Faculty of Agrarian and Veterinary Sciences (FCAV) Jaboticabal, São Paulo State, Brazil, during winter-spring-summer of 2001-2002, to determine the fractionation of nitrogen and carbohydrates in Tifton 85 (Cynodon dactylon Vanderyst x Cynodon nlemfuensis (L.) Pers), exclusively or oversown with winter annual forage species. Treatments comprised bristle oat (Avena strigosa Schreb), yellow oat (Avena byzantina C. Koch), triticale (X Triticosecale Wittmack), bristle oat + yellow oat, bristle oat + triticale, yellow oat + triticale, bristle oat + yellow oat + triticale seeded in Tifton 85 and sole crop (control). Experimental design was composed of completely randomized blocks with three replications. Fodder was cut 20 cm high (presence of winter forage) and 10 cm high (Tifton 85 pasture). Crude protein, total carbohydrate and the fractions of nitrogen compounds and carbohydrates were determined. Decrease was reported in the levels of chemical compounds in winter forage species and in Tifton 85 during the evaluation periods. The content of nitrogen compounds and carbohydrates varied widely during the evaluation period according to the morphological characteristics of grass species and botanical composition of pastures.
Descrição
Palavras-chave
Avena sp., Cynodon sp., Grassland management, Tillage, triticale, Avena sp., Cynodon sp., Manejo de pastagem, Plantio direto, Triticale
Como citar
Acta Scientiarum. Animal Sciences. Editora da Universidade Estadual de Maringá (UEM) - EDUEM, v. 34, n. 1, p. 07-14, 2012.