Seasonal Trends in Chemical Composition and Digestion ofDichanthium annulatum(Forssk.) Stapf

Ramírez, Rafael; González‐Rodríguez, Humberto; García-Dessommes, Guillermo Juan; Morales-Rodríguez, R.

doi:10.1080/09712119.2005.9706784

Cited by 5 publications

(3 citation statements)

References 9 publications

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“…However, CP concentration in plants is influenced mainly by the supply of available N in soil and the state of maturity. Studies carried out in the same area (Ramírez et al, 2003a,b;Ramírez et al, 2005) reported that CP content in cultivated grasses such as Panicum coloratum, C. ciliaris, Cynodon dactylon and Dichanthium annulatum and in native grasses such as Aristida longiseta, B. gracilis, C. incertus, H. Berlangeri, P. hallii, and S. macrostachya (Ramírez et al, 2004) markedly declined as the plant increased in maturity, possibly because of the relative increase in the cell wall and decrease in the cytoplasm. It is possible that this effect could be manifested in the evaluated grasses of this study in winter and spring, because grasses showed the lowest CP content in these seasons.…”

Section: Chemical Compositionmentioning

confidence: 99%

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

Ramírez¹,

González‐Rodríguez²,

Morales-Rodríguez³

et al. 2009

CZECH J ANIM SCI

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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.

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Section: Chemical Compositionmentioning

confidence: 99%

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

Ramírez¹,

González‐Rodríguez²,

Morales-Rodríguez³

et al. 2009

CZECH J ANIM SCI

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“…Seasonal rainfall, however, positively influenced ( r = 0.3 1; P<0.05) EDNDF. This correlation coefficient may be explained because of the seasonal patterns visually approximated those obtained with NDF concentrations and annulatum (Ramirez et al, 2005). According rainfall.…”

Section: Resultsmentioning

confidence: 59%

In situDigestibility of Neutral Detergent Fiber of IntroducedCenchrus ciliarisand Six Native Mexican Grasses Consumed by Small Ruminants

Ramírez

2007

Journal of Applied Animal Research

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Ramirez, R.G. 2007. I n situ digestibility of neutral detergent fiber of introduced Cenchrus ciliaris and six native Mexican grasses consumed by small ruminants. J. Appl. Anim. Res., 31: 53-57. Native grasses from northeastern Mexico such as Aristida longiseta (Steud), Bouteloua gracilis (Thurb), Cenchrus incertus (M.A. Curtis), Hilaria berlangeri (Steud, Nash), Panicum hallii Warsey) and Setaria macrostachya (H.B.K.) and introducedCenchrus ciliaris (L), a cultivated grass, that are consumed by range small ruminants were evaluated to estimate seasonally, their neutral detergent fiber (NDF) content and the rate and extent of NDF digestion. Panicum hallii was lower (72, 34, 26%, respectively) in NDF, cellulose and hemicellulose content and A. longiseta was higher (87, 37, 37%). Cenchrus incertus (42% annual mean) was higher in EDNDF and A. longiseta (25%) was lower. With exception of C. incertus, all native grasses had lower EDNDF than C. ciliaris (40%). Because of their low NDF digestion most native grasses could be considered poor food resources for range small ruminants.

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“…En consecuencia, los ganaderos y agricultores han optado por establecer especies alternativas que pudieran representar una mejor opción forrajera, tales como el pasto 'Pretoria 90' (Dichanthium annulatum), Bermuda Cruza 2 y 'Klein' (Panicum coloratum); en estas especies los rendimientos dependen de la precipitación anual y fluctúan entre 3 y 8 t MS ha -1 año -1 (García et al, 2007) y los contenidos de proteína cruda varían de 6.6 a 10.5 % (Faria y Sánchez, 2007;Ramírez et al, 2004;Ramírez et al, 2005). Debido a las altas temperaturas y sequías prolongadas que con frecuencia ocurren en la región noreste del país, la mayoría de estos pastos reducen considerablemente su calidad nutricional lo que limita drásticamente la producción animal (Romero et al, 2007) Existen cultivares del género Pennisetum promisorios para la ganadería, ya que generalmente presentan rendimientos en biomasa superiores a 40 t ha -1 por corte y 120 t ha -1 año -1 base húmeda (Martínez et al, 1994) y un contenido de proteína cruda de 11.4 % base seca (Valenciaga et al, 2001).…”

Section: Introductionunclassified

ESTABLECIMIENTO DEL PASTO ‘CT-115’ (Pennisetum purpureum) EN UNA ZONA SEMIÁRIDA DEL NORESTE DE MÉXICO

et al. 2013

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El objetivo del experimento fue evaluar el efecto de dos densidades (17 850 y 11 350 plantas/ha) y cuatro fechas de siembra (julio, agosto, septiembre y octubre de 2009) en el establecimiento del pasto Pennisetum purpureum cv. ‘CT-115’. Se utilizó un diseño completamente al azar con parcelas divididas con dos repeticiones de las parcelas grandes en donde estuvieron asignadas las fechas de siembra; las densidades de siembra fueron asignadas al azar a subparcelas dentro de cada parcela grande. Se muestrearon aleatoriamente siete plantas por unidad experimental para estimar las proporciones de hojas, tallos y material muerto; la relación hoja:tallo; los porcentajes de materia seca (MS) de tallo, número de tallos/planta; y el rendimiento de MS (g m-2). Se registraron datos de temperatura y precipitación. En el mes de mayo del 2010, se evaluó el grado de establecimiento del pasto. Las heladas (-6 oC) ocurridas durante dos días consecutivos en enero de 2010 no afectaron el establecimiento del pasto ‘CT-115’, ya que rebrotó plenamente en abril ). La densidad de siembra influyó (P ≤ 0.05) en la proporción de material muerto el cual fue de 15.8 vs. 11.4 % para las densidades de siembra de 17 850 y 11 350 plantas/ha, respectivamente, pero no afectó (P > 0.05) al rendimiento de materia seca. Hubo menor porcentaje de MS en tallo en las plantas sembradas en julio y agosto que en las sembradas en fechas posteriores; así mismo, la proporción de hoja fue mayor (P ≤ 0.05) en esos primeros dos meses (57.7 y 58.5 %; respectivamente). La relación hoja:tallo y el número de tallos/planta fueron también mayores (P ≤ 0.05) en las dos primeras fechas de siembra. Se concluye que la producción de materia seca no fue afectada por la densidad y la fecha de siembra, y que las dos heladas de enero 2010 no afectaron el establecimiento del pasto ‘CT-115’, a pesar de su origen tropical.

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Seasonal Trends in Chemical Composition and Digestion ofDichanthium annulatum(Forssk.) Stapf

Cited by 5 publications

References 9 publications

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

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

In situDigestibility of Neutral Detergent Fiber of IntroducedCenchrus ciliarisand Six Native Mexican Grasses Consumed by Small Ruminants

ESTABLECIMIENTO DEL PASTO ‘CT-115’ (Pennisetum purpureum) EN UNA ZONA SEMIÁRIDA DEL NORESTE DE MÉXICO

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