Sistemas de alimentação para a recria de ovinos a pasto: avaliação do desempenho animal e características da forragem

Brum, Marcos da Silva; Quadros, Fernando Luíz Ferreira de; Martins, Jorge Dubal; Rossi, Guilherme Ebling; Daniel, Everton; Maixner, Adriano Rudi; Bandinelli, Duilio Guerra

doi:10.1590/s0103-84782008000100031

Cited by 10 publications

(9 citation statements)

References 8 publications

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“…The results above show decreasing CP content with increasing cutting age. Brum et al (2008) found CP contents of 23.71% 60 days after germination in a millet pasture that was fertilised with 90kg ha -1 N. Camargo et al (2009) reported an average CP content of 20% 21 days after germination in a millet pasture that was fertilised with 100kg ha -1 N. These results agree with the results of this study. In this study, high CP contents were found that were most likely caused by the presence of a large number of leaves at cutting.…”

Section: Resultssupporting

confidence: 90%

Bromatological composition and dry matter digestibility of millet cultivars subjected to nitrogen doses

Buso

França

Miyagi

2014

Arq. Bras. Med. Vet. Zootec.

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The bromatological composition and in vitro dry matter digestibility of millet cultivars were assessed for different nitrogen doses and two sowing seasons in the Ceres municipality of Goiás state, Brazil. The treatments consisted of three millet cultivars (ADR-7010, ADR-500 and BRS-1501), four nitrogen (N) doses (0, 50, 100 and 200kg ha -1 of N) and two sowing seasons. Three replicates and a randomised block design with a 3 x 4 x 2 factorial scheme were used. Two cuttings were performed in each season when plants reached an average height of 0.70 cm. No significant interactions were observed between or among cultivars for N doses and dry matter (DM), crude protein (CP), neutral detergent fibre (NDF) and acid detergent fibre (ADF) contents. The DM, CP, NDF and ADF contents were significantly different between N doses. The DM and CP contents increased as the N dose increased to 100kg ha -1 . The maximum DM and CP contents were 11.14 and 22.53%, respectively. The NDF and ADF contents were higher in the control treatment (60.11 and 30.01%, respectively). In addition, the lowest ADF and NDF concentrations occurred at an N dose of 50kg ha -1 (56.33 and 30.23%, respectively). The DM contents were higher for the February sowing, with an average of 10.59%. The highest CP and ADF contents were found for the December sowing (22.46 and 31.58%, respectively). No significant differences were found for millet cultivars, N doses or sowing seasons. A significant interaction was found between sowing season and millet cultivar. The BRS-1501 cultivar had a higher in vitro dry matter digestibility in the December/2010 sowing (73.88%).Keywords: fibres, forage, dry matter, Pennisetum glaucum, protein, urea de dezembro/2010 (73,88%). RESUMO Foram avaliadas a composição bromatológica e a digestibilidade in vitro da massa seca de cultivares de milheto, sob doses de nitrogênio, em duas épocas de semeadura, no município de Ceres, Goiás. Os tratamentos foram constituídos por três cultivares de milheto: (ADR-7010, ADR-500 e BRS-1501) e quatro doses de N (0,50

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Section: Resultssupporting

confidence: 90%

Bromatological composition and dry matter digestibility of millet cultivars subjected to nitrogen doses

Buso

França

Miyagi

2014

Arq. Bras. Med. Vet. Zootec.

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“…Entre os cultivares avaliados, observou-se diferença significativa (P<0,05) entre as produções para o primeiro e segundo corte, com melhor produção do cultivar ADR-7010 (1175,91 kg.ha -1 de MS) no primeiro corte (Tabela 1). Valores produtivos inferiores foram determinados por Brum et al 19 23 observaram por meio da equação de regressão aumento linear e quadrático para o primeiro e segundo cortes, respectivamente, na produção de massa seca, com o ponto de máxima produção estimado em 179 kg.ha -1 de N. Magalhães et al 11 conduziram avaliação experimental com doses de fósforo e doses de nitrogênio sobre a produção de MS e também não observaram interação entre os fatores, porém, verificaram efeito linear e quadrático das doses de nitrogênio sobre a produção de MS.…”

Section: Resultsunclassified

Eficiência da fertilização fosfatada e nitrogenada em cultivares de milheto

et al. 2014

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RESUMOObjetivou-se avaliar a produção de massa seca (PMS) da planta inteira, determinar o nitrogênio contido (NC) no tecido da planta, a eficiência de conversão aparente do nitrogênio (ECAN) e a recuperação aparente do nitrogênio (RAN) de cultivares de milheto forrageiro submetidos às fontes de fósforo e doses de nitrogênio. O experimento realizado no ano agrícola de 2008 constou de um fatorial 2 × 3 × 4, em arranjo de blocos completos ao acaso, com quatro repetições. Os tratamentos foram constituídos pelos cultivares ADR-7010; ADR-500 e BRS-1501, pelas fontes de fósforo superfosfato simples (SS) e termofosfato (TF), as quais foram aplicadas na dose de 70 kg.ha-1 e doses de N (0; 40; 80 e 160 kg.ha-¹ sob forma de uréia). A análise estatística revelou ausência de interações significativas entre as variáveis. Entre os cultivares avaliados, a melhor produção (P<0,05) foi a do cultivar ADR-7010 (1175,9 kg.ha -1 de MS), o superfosfato simples apresentou resultados superiores. O incremento de N promoveu aumentos produtivos, a sucessão dos cortes reduziu a produção de MS. Houve diferença (P<0,05) para NC, sendo que, à medida que as doses de N foram elevadas, houve acréscimo linear do NC com valor máximo de 42,7 kg de N extraído. A ECAN e RAN diminuiu em função do acréscimo do nutriente, com valores máximos de 10,7 kg.ha -1 e 33,4% na dose referente a 40 kg.ha -1 de N. A fertilização nitrogenada promoveu incrementos na produção de massa seca dos cultivares de milheto. PALAVRAS-CHAVE: fósforo, Pennisetum glaucum, potencial produtivo, proteína bruta, uréia. EFFICIENCY OF NITROGEN AND PHOSPHATE FERTILIZATION ON PEARL MILLET CULTIVARS ABSTRACTIn this study we aimed at evaluating the dry matter production (DMP), nitrogen content (NC) in plant tissues, above ground nitrogen conversion efficiency (ANCE) and above ground nitrogen recovery (ANR) by pearl millet cultivars submitted to different sources of phosphorus and nitrogen doses. The experiment was carried out in 2008 and a completely randomized block design was used in a 2 × 3 × 4 factorial arrangement with four replications. Treatments consisted of three pearl millet cultivars (ADR-7010; ADR-500 and BRS-1501), two sources of phosphorus (simple phosphate and thermo phosphate) at one dose (70 kg.ha -1) and four nitrogen (urea) doses (0; 40; 80 and 160 kg.ha -1 ). Statistical analysis revealed no significant interactions among variables. ADR-7010 presented (P<0.05) best dry matter production (1175.9 kg.ha -1 ) amongst cultivars; and simple phosphate showed better result than thermo phosphate. Increasing nitrogen doses led to increased production; harvest succession reduced DMP. There was difference (P<0.05) in NC. Linear NC increase was observed in function of N doses, with maximum value being 42.7 kg of extracted N. The ANCE and ANR decreased with nutrient input, maximum values being 10.7 kg.ha -1 and 33.4%,

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“…Similarly, Brum et al (2008), in a study that evaluated the animal performance and forage characteristics in feeding systems for rearing of grazing sheep found mean daily gain of 87.3 g/day. As to feed conversion, there was a significant difference (P<0.05) between treatments, with the best feed conversion found in supplemented animals, regardless of the type of energy source used in the supplement, with means of 9.63 (kg of DM ingested/kg of gain).…”

Section: Resultsmentioning

confidence: 95%

Santa Inês sheep supplementation on urochloa grass pasture during the dry season: intake, nutrient digestibility and performance

Almeida¹,

Pereira²,

Silva³

et al. 2012

R. Bras. Zootec.

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-This study was conducted with the objective of evaluating the effect of concentrate supplementation, formulated with different ingredients (Mesquite pod meal, sorghum meal or wheat meal and mineral supplementation) on performance, intake and digestibility of nutrients in Santa Inês lambs grazing on urochloa grass during the dry season. Twentyfour uncastrated weaned Santa Inês sheep, with average body weight (BW) 20±2 kg with an average of 120 days of age were used in the assay. The experiment lasted 75 days. The animals grazing deferred Urochloa grass (Urochloa mosambicensis (Hack) Daudy) were distributed into four treatments consisting of mineral supplementation provided ad libitum and concentrated supplements containing mesquite pod meal, sorghum meal or wheat meal, supplied 10 g /kg BW on dry matter basis. The intakes of dry matter (DM) and crude protein (CP) were affected by the intake of concentrate supplement, regardless of the ingredients used in the supplements, compared with the mineral supplementation treatment, since the consumption of forage was reduced in 30% with mesquite pod meal supplement, and neutral detergent fiber (NDF) intake was not affected in relation to treatments. The digestibility of DM and CP were higher for treatments with supplements, and NDF digestibility did not differ between treatments. A significant difference was observed in the values of average daily gain for the treatments with concentrate supplementation compared with the one of mineral supplementation. The supplementation with concentrate in grazing enables improvement of performance, intake and digestibility of nutrients regardless of the ingredient used in the supplement.

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Sistemas de alimentação para a recria de ovinos a pasto: avaliação do desempenho animal e características da forragem

Cited by 10 publications

References 8 publications

Bromatological composition and dry matter digestibility of millet cultivars subjected to nitrogen doses

Bromatological composition and dry matter digestibility of millet cultivars subjected to nitrogen doses

Eficiência da fertilização fosfatada e nitrogenada em cultivares de milheto

Santa Inês sheep supplementation on urochloa grass pasture during the dry season: intake, nutrient digestibility and performance

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