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Chemical composition and dry matter digestion of some native and cultivated grasses in Mexico

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  • R.G. Ramírez

    (Faculty of Biological Sciences, Autonomous University of Nuevo León in San Nicolás de los Garza, Nuevo León, México)

  • H. González-Rodríguez

    (Faculty of Forestry Sciences, Autonomous University of Nuevo León in Linares, Nuevo León, México)

  • R. Morales-Rodríguez

    (Faculty of Biological Sciences, Autonomous University of Nuevo León in San Nicolás de los Garza, Nuevo León, México)

  • A. Cerrillo-Soto

    (Faculty of Veterinary Medicine, Juárez University of the State of Durango in Durango, Durango, México)

  • A. Juárez-Reyes

    (Faculty of Veterinary Medicine, Juárez University of the State of Durango in Durango, Durango, México)

  • G.J. García-Dessommes

    (National Institute of Agricultural Research, in Terán, Nuevo León, México)

  • M. Guerrero-Cervantes

    (Faculty of Biological Sciences, Autonomous University of Nuevo León in San Nicolás de los Garza, Nuevo León, México
    Faculty of Veterinary Medicine, Juárez University of the State of Durango in Durango, Durango, México)

Abstract

The objective of the study was to quantify differences in nutritive value, over four seasons, of native grasses such as Bouteloua curtipendula, Bouteloua trifida, Brachiaria fasciculata, Chloris ciliata, Digitaria insularis, Leptochloa filiformis, Panicum hallii, Panicum obtusum, Paspalum unispicatum, Setaria grisebachii, Setaria macrostachya, Tridens eragrostoides, Tridens muticus and naturalized chrus ciliaris and Rhynchelytrum repens that are used as forages for grazing beef cattle. Cenchrus ciliaris was included as a reference grass of good nutritional quality. Plants were collected in autumn 2001 and in winter, spring and summer 2002. The nutritive value was assessed in terms of nutrient content, effective rumen degradable dry matter (EDDM), metabolizable energy (ME) and metabolizable protein (MP). Most grasses had crude protein (CP) content comparable to the reference C. ciliaris grass (grand mean = 120 g/kg) and some of them had a higher content (140 g/kg). Cell wall (NDF) and lignin contents were lower in C. ciliaris (650 g/kg, 30, respectively) than in the other grasses (mean = 700 g/kg, 60, respectively). All grasses had less EDDM (mean = 420 g/kg) than C. ciliaris (470 g/kg). All grasses had the ME content (mean = 5.6 MJ/kg DM) that was lower for maintenance requirements of growing beef cattle. Conversely, mean MP values (67 g/kg DM) were sufficient. Lower content of P (annual mean = 120 g/kg DM), Na (0.3) and Cu (40 mg/kg DM) was detected in all grasses to meet the requirements of growing cattle. All grasses, in all seasons, had sufficient CP and MP content to meet the maintenance requirements of growing beef cattle. Higher levels of EDDM occurred in summer and autumn. Because of their good nutritional quality, grasses such as B. fasciculata, C. ciliata, P. hallii, P. obtusum, S. grisebachii, S. macrostachy and T. eragrostoides can be considered as good forages for ruminants.

Suggested Citation

  • R.G. Ramírez & H. González-Rodríguez & R. Morales-Rodríguez & A. Cerrillo-Soto & A. Juárez-Reyes & G.J. García-Dessommes & M. Guerrero-Cervantes, 2009. "Chemical composition and dry matter digestion of some native and cultivated grasses in Mexico," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 54(4), pages 150-162.
  • Handle: RePEc:caa:jnlcjs:v:54:y:2009:i:4:id:1741-cjas
    DOI: 10.17221/1741-CJAS
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    References listed on IDEAS

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    1. F. Jančík & P. Homolka & B. Čermák & F. Lád, 2008. "Determination of indigestible neutral detergent fibre contents of grasses and its prediction from chemical composition," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 53(3), pages 128-135.
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    1. F. Jančík & V. Koukolová & P. Homolka, 2010. "Ruminal degradability of dry matter and neutral detergent fibre of grasses," Czech Journal of Animal Science, Czech Academy of Agricultural Sciences, vol. 55(9), pages 359-371.

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