In vitro ruminal degradation of neutral detergent fiber insoluble protein from tropical pastures fertilized with nitrogen

Lagunes, Francisco Indalecio Juárez; Pell, Alice N.; Blake, Robert W.; Lagunes, Maribel Montero; Rodríguez, Juan Manuel Pinos

doi:10.22319/rmcp.v9i3.4490

Cited by 4 publications

(1 citation statement)

References 27 publications

(45 reference statements)

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“…The concentrations of proximate nutrients, fiber fractions, CP fractions, and the in vitro fermentation parameters (i.e., GP, DOM, and metabolizable energy) of most analyzed forage species were within the range of values described for the respective species in the literature [30][31][32][33][34][35][36][37][38]. No published information was available on the PRCP supply from tropical forages; however, the RUP concentrations determined in situ were within the range of values found in previous studies for the respective forage species [30,[39][40][41][42][43][44][45][46][47][48].…”

Section: Nutritional Characteristics Of Foragesmentioning

confidence: 96%

Evaluating the Protein Value of Fresh Tropical Forage Grasses and Forage Legumes Using In Vitro and Chemical Fractionation Methods

Salazar-Cubillas

Dickhoefer

2021

Animals

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The objectives of the present study were (1) to assess the adequacy of the in vitro and chemical methods to predict post-ruminal crude protein supply (PRCP) from fresh tropical forage, and (2) to identify PRCP supply predictors. Twenty-three fresh forage grasses and 15 forage legumes commonly used in domestic cattle feeding in the tropics and subtropics were incubated in the rumen of cows to determine ruminal crude protein (CP) degradation. The PRCP supply was calculated from in situ rumen-undegraded CP and in vitro organic matter digestibility (i.e., reference method), from ammonia-nitrogen release during in vitro incubation (i.e., in vitro method), and from the concentrations of chemical CP fractions (i.e., chemical method). The adequacy was evaluated using error-index and dimensionless parameters, and stepwise regression was used to select PRCP predictors. Adequacy ranged from poor to moderate (0.53 to 0.74) for the in vitro method being lower for forage legumes at a slow rumen passage rate (0.20), and even poorer (0.02 to 0.13) for the chemical method. Hence, the in vitro method can estimate PRCP supply in tropical forages with moderate to high but not with slow passage rates. Equations developed in the present study appear to predict PRCP supply with reasonable adequacy.

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Section: Nutritional Characteristics Of Foragesmentioning

confidence: 96%

Evaluating the Protein Value of Fresh Tropical Forage Grasses and Forage Legumes Using In Vitro and Chemical Fractionation Methods

Salazar-Cubillas

Dickhoefer

2021

Animals

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Estimating the proportion of in situ rumen-undegraded crude protein from chemical crude protein and fiber fractions in tropical forage grasses and legumes

Salazar-Cubillas

Dickhoefer

2021

Animal Feed Science and Technology

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Yield and nutritive value of Stylosanthes spp. genotypes subjected to different harvest frequencies and seasons of the year

Diniz,

Santos,

Cunha

et al. 2023

J. Agric. Sci.

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Productive and nutritional traits of forage species in various regions worldwide depend on different management strategies. This study aimed to evaluate the effects of harvest frequency (56, 77 and 98 days) and season of the year (rainy and dry) on the nutritional value and fractionation of carbohydrates and proteins of Stylosanthes genotypes (S. seabrana, S. scabra, S. mucronata and Stylosanthes spp. cv. Campo Grande). The experiment was conducted using a randomized complete block design with a split-plot arrangement and four repetitions. Contents of neutral detergent fibre (NDF), acid detergent fibre (ADF), in vitro digestible dry matter (IVDDM), condensed tannins and total phenolic compounds were influenced by the interaction of harvest frequency and season of the year. The 98-day harvest frequency resulted in lower IVDDM (579 g/kg) due to the high NDF and ADF concentrations during the rainy season. S. seabrana and S. scabra showed a higher proportion of A + B1 and B2 carbohydrate fractions, while the C fraction in the rainy season was greater in the Campo Grande, resembling S. seabrana. S. scabra displayed 15% of the crude protein in fraction A. The bromatological traits of Stylosanthes spp. did not decline sharply owing to plant age advancement, indicating these genotypes are suitable for forage production systems in tropical or semiarid regions.

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In vitro ruminal degradation of neutral detergent fiber insoluble protein from tropical pastures fertilized with nitrogen

Cited by 4 publications

References 27 publications

Evaluating the Protein Value of Fresh Tropical Forage Grasses and Forage Legumes Using In Vitro and Chemical Fractionation Methods

Evaluating the Protein Value of Fresh Tropical Forage Grasses and Forage Legumes Using In Vitro and Chemical Fractionation Methods

Estimating the proportion of in situ rumen-undegraded crude protein from chemical crude protein and fiber fractions in tropical forage grasses and legumes

Yield and nutritive value of Stylosanthes spp. genotypes subjected to different harvest frequencies and seasons of the year

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