Ruminal degradability of dry matter and neutral detergent fibre of grasses

Jančík, F.; Koukolová, V.; Homolka, P.

doi:10.17221/211/2009-cjas

Cited by 11 publications

(7 citation statements)

References 30 publications

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“…However, an R 2 -value of 0.689 showed that ADF can be used as a single predictor for INDF. Jančík et al (2010) reported that the combination of ADF and NDF was the most suitable predictor for ED NDF of dried F. arundinacea (R 2 = 0.941, RMSE = 18.3). Chemical parameters as predictors of digestion become complicated when plant types such as legumes or gramineae are studied (Khazaal et al, 1995).…”

Section: Resultsmentioning

confidence: 99%

Comparison of analyses to predict ruminal fibre degradability and indigestible fibre in temperate grass silages

Jančík¹,

Koukolová²,

Homolka³

et al. 2011

SA J. An. Sci.

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________________________________________________________________________________ AbstractThe objective of this study was to compare the ruminal degradability of neutral detergent fibre (NDF) and indigestible NDF (INDF) between silages (n = 24) that originated from three different temperate grass species, i.e. Dactylis glomerata L., Festuca arundinacea L. and hybrid, Felina -Lolium multiflorum L. × Festuca arundinacea S. The data is used to create prediction equations for the effective degradability of NDF (ED NDF ), assuming ruminal solid outflow rates of 0.02 (low), 0.05 (medium) and 0.08/h (high), and INDF. The highest values for the potentially degradable fraction of NDF (b), ED NDF2 , ED NDF5 and ED NDF8 (874, 560, 366 and 272 g/kg NDF, respectively) and the lowest for INDF (73.1 g/kg DM) were found for F. arundinacea. These parameters were significantly different from the hybrid Felina, which presented the lowest rate of NDF degradation (c), ED NDF5 and ED NDF8 (0.033/h, 341 and 250 g/kg NDF, respectively). The highest for c (0.038/h) and INDF (86.9 g/kg DM) and the lowest for b (847 g/kg NDF) were detected for D. glomerata. The combination of acid detergent fibre (ADF) and acid detergent lignin (ADL) (R 2 = 0.844) were identified by a backward, stepwise, multiple regression analysis as the most accurate to predict INDF. Crude protein, ADF and NDF were found as the most suitable combination for predicting ED NDF2 (R 2 = 0.715), ED NDF5 (R 2 = 0.669) and ED NDF8 (R 2 = 0.648). Calculated equations found practical application in laboratory analyses to evaluate the nutritional quality of feeds for ruminants. ________________________________________________________________________________

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Section: Resultsmentioning

confidence: 99%

Comparison of analyses to predict ruminal fibre degradability and indigestible fibre in temperate grass silages

Jančík¹,

Koukolová²,

Homolka³

et al. 2011

SA J. An. Sci.

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“…Low-quality forage often does not provide enough energy to adequately maintain cows during lactation (Baumann et al, 2004). Several authors (Buxton, 1996;Van Soest, 1996;Dubbs et al, 2003;Jančík et al, 2010 and others) mentioned temperature, light intensity, water availability, altitude, seasonal changes, weather, and the maturity stage of plants as factors influencing forage quality. Some authors (Hunt et al, 1989;Bal et al, 1997) have investigated the time of harvest for assessing the optimal maturity stage of the plant concerning nutrient content and digestibility.…”

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confidence: 99%

Nutritive value of red clover and lucerne forages for ruminants estimated by in vitro and in vivo digestibility methods

Homolka¹,

Koukolová²,

Podsedníček³

et al. 2012

CZECH J ANIM SCI

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ABSTRACT:The aim of this study was to determine the nutrient and energy levels of red clover and lucerne forage. Investigation of forage at different maturity stages of three growths was carried out by chemical analysis, in vitro and in vivo digestibility methods. Generally, maturation caused a significant increase in fibre fractions. With the increasing maturity of forage samples the in vivo, in vitro, and calculated in vivo (in vivo calcul ) digestibilities of organic matter (OM) linearly decreased. The in vitro and in vivo calcul digestibilities of OM averaged 0.754 and 0.708 for red clover and 0.717 and 0.667 for lucerne, respectively. The in vivo OM digestibility averaged 0.710 for red clover and 0.666 for lucerne. Gross energy (GE), digestible energy (DE), metabolizable energy (ME), net energy for lactation (NEL), and net energy for growth (NEG) averaged 18.12, 12.41, 9.60, 5.67, 5.50 and 18.09, 11.56, 9.01, 5.26, 4.99 MJ/kg of dry matter for red clover and lucerne, respectively. The effect of a vegetative stage on energy values of both forages was diverged for various growth times. When data were pooled across the estimated season, seven cutting-specific equations for descriptions of GE, DE, ME, NEL, NEG, in vitro, and in vivo OM digestibilities were obtained for red clover and lucerne, separately. The red clover model expression gave similar prediction equations for lucerne. It was possible to predict cutting-specific equations with coefficients of determination R 2 > 0.719 for red clover and R 2 > 0.400 for lucerne of the variation in GE, DE, ME, NEL, and NEG. The in vitro and in vivo OM digestibility equations were predicted with R 2 being 0.840 (in vitro) and 0.707 (in vivo) for red clover, and 0.979 (in vitro) and 0.937 (in vivo) for lucerne. The parameters of these specific equations were statistically preferable than the general model expression which included both forages together.

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“…Indeed, grasses with low ruminal degradability are commonly found to have low levels of nitrogen and energy as well as higher fiber concentration, and thus cannot support optimum microbial protein synthesis necessary for higher animal performance [65]. The nutrients available to ruminants are crucially determined by the extent and rate of DM fermentation in the rumen [66]. Grass-based animal production is often compromised when grass DMD is low, which could be a consequence of a limited grass growing period [67].…”

Section: In Vitro Ruminal Dry Matter Degradabilitymentioning

confidence: 99%

Contribution of Soil Type to Quantity and Nutritional Value of Grass Species on the South African Highveld

et al. 2021

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The biggest threat to cattle production in most South African communal areas is poor management of grazing, which negatively affects vegetation and soil structures. This study was conducted to assess the spatial variation of grass species density, production potential and quality in Breyten (Hutton soil type), Davel (Avalon soil type), and Wesselton (Clovelly soil type) communal rangelands in the highveld region of Mpumalanga province. Three 100 m transects per grazing area, placed at 50 m intervals (0, 50, and 100 m) were used to collect soil samples at 200 mm depth. A 100 m permanent line point method, replicated three times (50 m apart) per site, was used to identify and collect grass species samples. Grass species were classified according to life form, palatability, ecological status, and abundance. Grasses species were also harvested for chemical composition and in vitro ruminal dry matter degradability determination. Soils from the study areas had an acidic pH range (3.5–4.5). Hutton soil had the highest (p < 0.05) nitrate (N-NO3) concentration (0.770 mg/kg) compared to Clovelly (0.030 mg/kg) and Avalon (0.533 mg/kg) soil types. Thirty-one grass species composed of 28 turf perennials, two weak perennials and one perennial creeping grass were identified across the study areas. About 16% of identified grass species were classified as highly palatable, 39% as moderately palatable, and 32% as unpalatable. Across all the soil types, Digitaria eriantha had the highest (p < 0.05) crude protein (CP) (106.5 g/kg DM) content when compared to other grass species. In the Avalon soil type, D. eriantha had the lowest (p < 0.05) neutral detergent fiber (NDF) (696.4 g/kg DM). Across all soils, D. eriantha, Aristida congesta, Eragrostis curvula, Eragrostis gummiflua, and Eragrostis plana grasses had the same (p > 0.05) 48-h in vitro ruminal dry matter degradability Hutton soil had a higher proportion of common and dominant grass species as well as more palatable species with higher crude protein content than Avalon and Clovelly soils. However, for all three rangelands, there is a need for supplementary feeding to enhance the production efficiency of livestock given that the nutritive value of grasses was low.

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Ruminal degradability of dry matter and neutral detergent fibre of grasses

Cited by 11 publications

References 30 publications

Comparison of analyses to predict ruminal fibre degradability and indigestible fibre in temperate grass silages

Comparison of analyses to predict ruminal fibre degradability and indigestible fibre in temperate grass silages

Nutritive value of red clover and lucerne forages for ruminants estimated by in vitro and in vivo digestibility methods

Contribution of Soil Type to Quantity and Nutritional Value of Grass Species on the South African Highveld

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