Variação anual da composição bromatológica de duas forrageiras cultivadas nas baixadas litorâneas do Estado do Rio de Janeiro, Brasil

Lacerda, Paulo Drude de; Malafaia, Pedro; Vieira, Ricardo Augusto Mendonça; Henrique, Douglas Sampaio; Made, Ivone Elizabeth Van Der; Faria, Ana Raquel Gomes

doi:10.1590/s0103-84782004000200029

Cited by 7 publications

(8 citation statements)

References 3 publications

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“…The values for limpo grass were similar to those found by Lacerda et al (2004) in a study done in a coastal slope area in Rio de Janeiro,in which the levels of total carbohydrates varied from 78.88% to 83.97% of dry matter. In a similar way, Henriques et al (2007a), when studying nilo grass, angola grass, limpo grass, and setaria grass found similar average values for total carbohydrates at the cutting ages of 28, 42 and 56 days.…”

Section: Resultssupporting

confidence: 87%

Fractions of carbohydrates and of nitrogenous compounds of tropical grasses at different cutting ages

et al. 2010

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-It was evaluated by the Cornell System carbohidrates fractions and nitrogenous compounds of the following grasses at the cutting ages of 14, 28, 42, and 56 days: nilo grass (Acroceras macrum), angola grass (Brachiaria purpurascens), aleman grass (Echinochloa polystachya), limpo grass (Hemarthria altíssima), setaria grass (Setaria anceps), tanner grass (Brachiaria arrecta), and tifton-85 grass (Cynodon spp). The experiment was carried out in a complete randomized block design, in a split plot arrangement in a way that the grasses were evaluated in the plots and the ages of cut in the split-plots. The age of cutting had an effect on the composition of the studied grasses. In most of the grasses, total carbohydrate levels, non-fibrous carbohydrates and A+B 1 fraction carbohydrates increased linearly according to the age of cutting. The potentially degradable fraction of carbohydrates (fraction B 2 ) showed a quadratic behavior according to the cutting ages for all grasses. The C fraction of the carbohydrates in tifton-85 grass linearly increased with the age but it did not increase significantly for the other grasses. In setaria grass, the intermediate levels of B 2 and B 3 nitrogenous fractions were high, which might represent a potential source of protein for ruminal degradation and for the small intestine. Palavras-chave: composição química, fibra detergente neutro, forrageira, proteína, sistema Cornell Revista Brasileira de Zootecnia

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Section: Resultssupporting

confidence: 87%

Fractions of carbohydrates and of nitrogenous compounds of tropical grasses at different cutting ages

et al. 2010

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“…Considering the amino acid requirement of lactating animals and dietary amino acid supply, it is possible that RUP sources can promote better productive responses when combined with forages such as sugarcane or elephant grass silage. Sugarcane exhibits a pronounced imbalance of nutrients and is usually only supplemented with NPN (Fernandes et al, 2001), whereas both elephant grass and corn silages provide more protein and RDP levels (Cabral et al, 2000;Lacerda et al, 2004). Thus, it is possible that supplementation with RUP reduces ammonia production in the rumen (Seymour et al, 1992).…”

Section: Introductionmentioning

confidence: 99%

Performance and metabolite profile of dairy cows fed tropical grasses and concentrates containing crude protein with low or high degradability

et al. 2016

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-Ten Holstein-Zebu crossbred cows distributed into two simultaneous Latin squares (5 × 5) as a 2 × 2 factorial arrangement formed by chopped sugarcane or elephant grass silage, both with high or low protein degradability supplements and a corn silage as a control treatment, were compared using orthogonal contrasts. The studied variables were the performance, plasma concentrations of urea-N, glucose, and creatinine, urine-N and milk urea-N, and the nychthemeral variation in NH 3 -N in the rumen fluid of dairy cows. Nutrient intake, milk production, and milk composition were affected by the treatments. The total mixed ration containing elephant grass silage combined with rumen undegradable protein (RUP) provided balanced amounts of carbon and nitrogen in the rumen. This effect may explain the 18% increase in milk yield compared with the other treatments. The diurnal pattern of ruminal NH 3 -N was interpreted with a sinusoid model. In general, cows fed elephant grass silage exhibited higher concentrations of blood plasma and milk urea-N than animals fed sugarcane. The cows that consumed elephant grass silage with rumen degradable protein concentrate showed a higher milk urea-N compared with animals that consumed elephant grass silage with the RUP concentrate. The use of diets based on corn silage leads to a better use of nitrogen compounds because these diets resulted in lower levels of urea-N in the plasma, urine, and milk at the same level of milk production compared with diets containing elephant grass silage or chopped sugarcane as roughages. In sugarcane-based diets, even greater nitrogen losses in the urine are observed, despite the presence of readily fermentable carbohydrates in the diet.

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“…Lacerda et al (2004), trabalhando com capim elefante sob corte em plantas com 1,8 m de altura, encontraram valores médios de 83,4%.…”

Section: Resultsunclassified

“…Cerca de 70 a 90% dos carboidratos consumidos em sistemas extensivos são oriundos dos constituintes da parede celular (Lacerda et al, 2004). Estes valores dependem da idade de corte da forrageira, mas também do ambiente que também pode interferir nestes valores (Santos et al, 2001).…”

Section: Resultsunclassified

Rendimento forrageiro e valor nutritivo de clones de pennisetum sob corte, na zona da mata seca

et al. 2011

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RESUMOObjetivou com este trabalho verificar a produção e valor nutritivo de cinco genótipos de Pennisetum (IRI-381, Venezuela, Elefante B, HV-241 e Hexaplóide) sob corte na Zona da Mata Seca de Pernambuco. As amostras foram obtidas de uma área útil de 2,0 m 2 , num delineamento em blocos casualizados com 6 repetições. Após o corte de uniformização, efetuaram-se quatro cortes a intervalos de 60 dias. Foi tomada uma amostra de três perfilhos de cada parcela. Foram avaliados os percentuais de matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN), fibra em detergente ácido (FDA), extrato etéreo (EE), matéria mineral (MM), digestibilidade in vitro da matéria seca (DIVMS) carboidratos totais (CHOT) e carboidratos não fibrosos (CNF). Os genótipos avaliados apresentaram rendimento médio de MS de lâminas foliares de 1,7 t/ha/corte e de colmos de 2,1 t/ha/corte, não havendo diferença entre clones (p>0,05). Nas lâminas foliares e nos colmos, respectivamente, observouse 21,1 a 15,1% para MS; 9,1 a 5,3% para PB; 73,2 a 77,7% para FDN; 40,3 a 47,4% para FDA; 9,6 a 11,6% para MM; 1,9 a 0,7% para EE; 56,2 a 56,3% para DIVMS; 79,3 a 82,4% para CHOT e 11,4 a 9,7% para CNF. Os clones apresentaram de média a alta herdabilidade e rendimento forrageiro e valor nutritivo semelhantes, quando manejados aos 60 dias de idade nas condiçoes da zona da mata seca de Pernambuco. SUMMARYThe objective of this work was to verify the MS production and nutritive value of five clones of Pennisetum. The samples were taken from an utile area of 2,0 m 2 in each plot. After clipping the forage to standarize, four cuts were performed with 60-d intervals. In each plot, three tillers were ovendried and grinded for laboratory analysis. The following response variables were determined: dry matter concentration (MS), crude protein (PB), neutral detergent fiber (FDN), acid detergent fiber (FDA), ether extract (EE), mineral matter (MM), in vitro dry matter digestibility (DIVMS), total carbohydrates (CHOT), and non-fibrous carbohydrates (CNF). The evaluated genotypes presented average MS yield of 1.7 and 2.1 t/ha/ cut, for leaf blade and stem, respectively. Average nutritive value was 21.1 and 15.1% for MS; 9.1 and 5.3% for PB; 73.2 and 77.7% for FDN; 40.3 and 47.4% for FDA; 9.6 and 11.6% for MM; 1.9 and 0.7% for EE; 56.2 and 56.3% for DIVMS; 79.3 and 82.4% for CHOT; and 11.4 and 9.7% for CNF, in leaf blades and stem, respectively. The clones presented medium to high heritability, similar biomass production and nutritive value, when *Projeto financiado pelo CNPq e PROMATA, realizado pelo acordo IPA-UFRPE.

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Variação anual da composição bromatológica de duas forrageiras cultivadas nas baixadas litorâneas do Estado do Rio de Janeiro, Brasil

Cited by 7 publications

References 3 publications

Fractions of carbohydrates and of nitrogenous compounds of tropical grasses at different cutting ages

Fractions of carbohydrates and of nitrogenous compounds of tropical grasses at different cutting ages

Performance and metabolite profile of dairy cows fed tropical grasses and concentrates containing crude protein with low or high degradability

Rendimento forrageiro e valor nutritivo de clones de pennisetum sob corte, na zona da mata seca

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