Estimativas de consumo do capim-elefante (Pennisetum purpureum Schum), fornecido picado para vacas lactantes utilizando a técnica do óxido crômico

Soares, João Paulo Guimarães; Berchielli, Telma Teresinha; Aroeira, Luiz Januário Magalhães; Deresz, F.; Verneque, Rui da Silva

doi:10.1590/s1516-35982004000300030

Cited by 24 publications

(24 citation statements)

References 14 publications

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“…O tempo médio de ocupação, independentemente da época do ano, variou de 1 a 2 dias e o tempo médio de descanso foi de 35 e 38 dias, respectivamente, nos períodos hibernal e estival. Períodos curtos de ocupação e de descanso (próximo a 30 dias para espécies tropicais) estão associados a melhor qualidade da forragem ofertada (Deresz et al, 2001;Soares et al, 2004).…”

Section: Resultsunclassified

Valor nutritivo de pastagens consorciadas com diferentes espécies de leguminosas

et al. 2009

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RESUMO -O objetivo neste trabalho foi avaliar o valor nutritivo de dois sistemas forrageiros (SF): capim-elefante (CE) + azevém + trevo-branco + espécies de crescimento espontâneo (SF1); e capim-elefante + azevém + amendoim forrageiro + espécies de crescimento espontâneo (SF2 Nutritive value of mixed pastures with different legumes speciesABSTRACT -The objective of this study was to evaluate the nutritive value of two pasture-based systems (PS), with elephant grass (EG) + ryegrass (RG) + white clover (WC) + spontaneous growing species (SGS), for PS1; and EG + RG + forage peanut (FP) + SGS, for PS2. Four paddocks, each one with 0.25 ha, were used in the assessment. A complete randomized block design was used with two replications (paddocks). The EG was established in rows with 4 m spacing.Pastures were fertilized with 50-40-40 kg/ha NPK formulated, respectively. Nine grazings were performed during the experimental period (326 days in PS1 and 336 in PS2). Holstein cows receiving 3.5 kg/daily complementary concentrate feed were used in the evaluation. The initial forage mass, botanical composition and structural components of EG were evaluated. Samples were collected by the hand-plucking method to analyze neutral detergent fiber (NDF), crude protein (CP), in vitro dry matter digestibility (IVDMD), in vitro organic matter digestibility (IVOMD) and total nutrient digestibility (TND). The mean values for NDF, CP, IVDMD, IVOMD and TDN were 47.71; 15.69; 77.28; 75.92; 65.00% in PS1; and 51.84; 14.62; 73.72; 72.27 and 63.06% in PS2, respectively. Superior results were detected for CP, IVDMD, IVOMD and TDN forage total in PS1 while superior NDF values were detected in PS2. In two pastures, the best nutritive value results were observed in the winter period. Both systems showed high qualitative values considering fertilization, management and use time.Key Words: elephant grass, forage peanut, ryegrass, white clover IntroduçãoEntre as vantagens da utilização de pastagens na produção de herbívoros, destaca-se o baixo custo, uma vez que a colheita da forragem é feita pelo próprio animal, transformando proteína vegetal em proteína animal, de maior valor biológico. Contudo, isso só é possível se o manejo da pastagem possibilitar a manutenção de seu R. Bras.

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Section: Resultsunclassified

Valor nutritivo de pastagens consorciadas com diferentes espécies de leguminosas

et al. 2009

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“…According to Ribeiro Filho et al (2008), the values of recuperation rates of chromium oxide stated in literature may be attributed to differences of kind and quality of diet. For instance, Soares et al (2004) observed higher recuperation of Cr 2 O 3 in animals receiving elephant grass of 60-day regrowth with 70% of NDF comparing to animals receiving the same forage with 30-day regrowth and 63% of NDF.…”

Section: Resultsmentioning

confidence: 93%

Assessment of indicators and collection methodology to estimate nutrient digestibility in buffaloes

et al. 2011

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-Dry fecal matter production was estimated from neutral detergent indicators on indigestible fiber, indigestible acid detergent fiber, indigestible dry matter, incubated for 144 hours and 288 hours, as well as chromium oxide (Cr 2 O 3 ) and enriched and purified isolated lignin (LIPE ® ) in two sampling schemes (3 and 5 days) on buffaloes. Sample consisted of five castrated animals with average weight of 300 ± 0.6 kg fed on elephant grass cv Cameroon (Pennisetum purpureum).Experimental design consisted of randomized blocks in subdivided plots. Production of dry fecal matter was overestimated when using Cr 2 O 3 , indigestible acid detergent fiber 144 hours, indigestible neutral detergent fiber 144 hours, indigestible neutral detergent fiber 288 hours and indigestible dry matter 144 hours, while indigestible acid detergent fiber 288 hours, indigestible dry matter 288 hours and LIPE ® did not differ from total collection. The same result was observed for apparent digestibility of nutrients. There was no difference in dry fecal matter production and digestibility between both collection periods of 3 and 5 days, demonstrating that a collection period of three days can be used to estimate dry fecal matter production in buffaloes.A three-day period of sample collection, in order to estimate dry fecal matter production and apparent digestibility coefficients, is therefore recommended. The use of LIPE ® , fibers in indigestible acid detergent and indigestible dry matter as indicators, both latter incubated for 288 hours, result in accurate estimates of dry fecal matter production in confined buffaloes, fed on a forage based diet.

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“…Grazing cycles with an occupation period of two to three days for tropical species, associated with rest periods of 30 days, are related to the higher forage quality and to the better animal performance (Deresz et al, 2001;Soares et al, 2004).…”

Section: Resultsmentioning

confidence: 99%

Forage mass and stocking rate of elephant grass pastures managed under agroecological and conventional systems

et al. 2014

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-The objective was to evaluate elephant grass (Pennisetum purpureum Schum.) pastures, under the agroecological and conventional systems, as forage mass and stocking rate. In the agroecological system, the elephant grass was established in rows spaced by 3.0 m from each other. During the cool season ryegrass (Lolium multiflorum Lam.) was established between these rows, which allowed the development of spontaneous growth species during the warm season. In the conventional system the elephant grass was established singularly in rows spaced 1.4 m from each other. Organic and chemical fertilizers were applied at 150 kg of N/ha/year with in the pastures under agroecological and conventional systems, respectively. Lactating Holstein cows which received 5.0 kg/day supplementary concentrate feed were used for evaluation. The experimental design was completely randomized, with two treatments (agroecological and conventional systems) two replications (paddocks) and independent evaluations (grazing cycles). The pastures were used during the whole year for the agroecological system and for 195 days in the conventional year. The average values of forage mass were 3.5 and 4.2 t/ha and the stocking rates were 2.08 and 3.23 AU/ha for the respective systems. The results suggest that the use of the elephant grass under the agroecological system allows for best distribution of forage and stocking rate to be more uniform throughout the year than the use of elephant grass in conventional system.

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Estimativas de consumo do capim-elefante (Pennisetum purpureum Schum), fornecido picado para vacas lactantes utilizando a técnica do óxido crômico

Cited by 24 publications

References 14 publications

Valor nutritivo de pastagens consorciadas com diferentes espécies de leguminosas

Valor nutritivo de pastagens consorciadas com diferentes espécies de leguminosas

Assessment of indicators and collection methodology to estimate nutrient digestibility in buffaloes

Forage mass and stocking rate of elephant grass pastures managed under agroecological and conventional systems

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