PRODUÇÃO E CARACTERÍSTICAS ESTRUTURAIS DE CINCO FORRAGEIRAS DO GÊNERO Brachiaria SOB INTENSIDADES DE CORTES INTERMITENTES

Bauer, Maristela de Oliveira; Pacheco, Lorenzo Paulo Alves; Chichorro, José Franklim; Vasconcelos, Lívia Vieira; Pereira, Danilo Franisco Campos

doi:10.5216/cab.v12i1.4817

Cited by 17 publications

(15 citation statements)

References 14 publications

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“…This may contain a greater contribution of assimilates in the reproductive than in the vegetative structures, thus reducing the leaf:stem ratio and resulting in an increased mass production of fodder. According to Bauer et al (2011), a high leaf:stem ratio represents forage with higher CP content and greater digestibility, increased forage acquisition facility, and consequently higher intake. The lowest herbage allowances (5 and 10 kg DM 100 -1 BW) showed higher nutritional values and digestibility.…”

Section: Pv Pmmentioning

confidence: 99%

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Dias

Gomes

Ítavo

et al. 2016

SCA

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This study aimed to evaluate the effect of three herbage allowances (5, 10, and 15 kg dry matter [DM] 100 -1 of body weight [BW]) for Brachiaria brizantha cv. Marandu pastures in a continuous grazing system on the morphological and nutritional characteristics of forage, animal performance, and economic viability in Nellore heifers. The total experimental area was 60 ha, divided into 12 paddocks of 5 ha each, with 4 paddocks per treatment. The experimental animals were Nellore heifers (260 in total), with average BW of 301.16 ± 9.12 kg, receiving 0.4 % BW in multiple supplements. We evaluated the production, structural characteristics, and nutritional value of the forage, productive performance, carcass characteristics, and economic viability of each allowance. There were significant effects for the production, structural characteristics, and nutritional value of the forage treatment. The proportions of leaves were 42.40, 38.20, and 30.88 % and the leaf:stem ratios were 1.22, 1.03, and 0.83 for the 5, 10, and 15 kg DM 100 -1 BW herbage allowances, respectively. The average daily weight gain (mean 0.42, 0.75, and 0.63 kg daily -1 ) and stocking rate (3.35, 1.87, and 1.26 animal unit ha -1 ) had a significant effect for the 5, 10, and 15 kg DM 100 -1 BW forage allowance, respectively. The herbage allowances were evaluated as being economically viable with a profit margin of 10.37, 23.65, and 14.43 % for the 5, 10, and 15 kg DM 100 -1 BW allowances, respectively. The greatest pasture response was found in the 5 kg DM 100 -1 BW allowance and was related to better nutritional values and morphological characteristics of the pasture and greater stoking rate and weight gain per area. The herbage allowance of 10 kg DM 100 -1 BW be applied to obtain higher animal performance and better economic viability of heifers in B. brizantha cv. Marandu pastures in a continuous grazing method that are receiving protein-energy supplementation.

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Section: Pv Pmmentioning

confidence: 99%

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Dias

Gomes

Ítavo

et al. 2016

SCA

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“…Usually, the lowest yields of tropical forages are recorded in winter, reflecting effects of low precipitation this time of year. The low temperature and hours of insolation also determine physiological changes affecting the growth of grasses (BAUER et al, 2011).…”

Section: Resultsmentioning

confidence: 99%

Sufficiency index for defining nitrogen recommendation in brachiaria grass pasture

Villar¹,

Pinto²,

Fonseca³

et al. 2015

Biosci. J.

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In addition to be absorbed by plants, nitrogen (N) applied in the soil is subject to loss by leaching, volatilization and microorganism immobilization. The spectral characteristics of plants have been used for defining the N fertilizer rate. However, it has been a challenge to translate the sensor readings into the N rate. Thus, the aim of the present study was to evaluate three spectral variables to recommend variable rate N fertilization in Brachiaria decumbens using the Nitrogen Sufficiency Index (NSI). The five treatments consisted of a control plot (without nitrogen application), a reference plot with a fixed N rate of 150 kg ha-1 and three different spectral readings for applying N at variable rates. In the variable rate plots were initially applied a N rate equal to 50% of that in the reference plot, and the following rates were defined based on NSI. The three spectral variables were: a portable chlorophyll meter readings, Visible Atmospherically Resistant Index (VARI RedEdge) and the ratio between Modified Chlorophyll Absorption Ratio Index and Optimized Soil Adjusted Vegetation Index (MCARI/OSAVI). The experiment was conducted in randomized block design with five replicates during three plant harvesting. The forage was harvested when the plant height was 25 cm in the reference plot. The variable rate treatments presented better nitrogen use efficiency than the fixed rate treatment. The portable chlorophyll meter was more suitable than the used vegetation indices to recommend variable N rate fertilization since their plots produced the same dry biomass matter as in the fixed rate plot with less amount of fertilizer applied.

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“…Marandu possuía partículas grandes que permitiam a seleção (Tabela 4) e pelo fato de que o capim se encontrava em estágio avançado de maturação no momento do corte para ensilagem, fato que também comprometeu a qualidade da mesma. Neste estágio, as plantas forrageiras diminuem a densidade e a proporção de folhas e aumentam a proporção de caule (13) , havendo um espessamento de parede celular da planta, o que resulta no incremento da concentração da FDN em detrimento do conteúdo celular (14) , desfavorecendo o consumo e a digestibilidade. De acordo com Maggioni et al (15) , algumas forragens só são consumidas por ruminantes quando são a única escolha, mas podem ser rejeitadas se existir o oferecimento de algum alimento alternativo.…”

Section: Resultsunclassified

Consumo E Digestibilidade De Nutrientes Da Torta De Dendê Na Dieta De Ovinos

et al. 2015

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ResumoObjetivou-se encontrar o nível ótimo de inclusão da torta de dendê na dieta de ovinos. Foram utilizados 18 carneiros, castrados, sem raça definida alimentados com níveis de inclusão da torta de dendê de 0%, 7,5%, 15% e 22,5% na dieta total. Os animais foram mantidos em gaiolas metabólicas por 21 dias. Os dados foram submetidos a estudo de regressão com 5% de significância para as equações e coeficientes de regressão. A inclusão da torta de dendê provocou redução nos consumos de MS, hemicelulose, FDN, PB, NDT, CHOT e MM (P<0,01) e não houve diferenças significativas nos de celulose, FDA e CNF (P>0,05). Os consumos de EE e lignina foram crescentes (P<0,01). O teor de fibra das dietas aliado ao consumo de lignina pelos animais provocou redução nos coeficientes de digestibilidade da EB e de todos os nutrientes avaliados (MS, PB, celulose, hemicelulose, FDN; P<0,05). Houve redução na metabolizabilidade das dietas devido ao aumento da EB fecal (P<0,01). O balanço de nitrogênio foi positivo em todos os tratamentos. A inclusão da torta de dendê acima de 7,5% na dieta de ovinos provoca redução no CMS e na digestibilidade de nutrientes com possível comprometimento do desempenho, especialmente, em animais de alta produção. Palavras-chave: balanço de energia; balanço de nitrogênio; Elaeis guineenses; lignina; ruminantes. AbstractThe aim of this study was to find the optimum inclusion level of palm kernel cake in sheep diet. We used 18 castrated rams, fed diets with inclusion levels of palm kernel cake of 0%, 7.5%, 15% and

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PRODUÇÃO E CARACTERÍSTICAS ESTRUTURAIS DE CINCO FORRAGEIRAS DO GÊNERO Brachiaria SOB INTENSIDADES DE CORTES INTERMITENTES

Cited by 17 publications

References 14 publications

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Herbage allowance effects on the characteristics of Brachiaria brizantha cv. Marandu pastures and the production and economic viability of Nellore heifersicas das pastagens de Brachiaria brizantha cv. Marandu e na produção e viabilidade econômica de novilhas Nelore

Sufficiency index for defining nitrogen recommendation in brachiaria grass pasture

Consumo E Digestibilidade De Nutrientes Da Torta De Dendê Na Dieta De Ovinos

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