Effect of cultivar and formaldehyde treatment of barley grain on rumen fermentation characteristics using in vitro gas productio

Author: 
M. Colkesen, A. Kamalak, O. Canbolat, Y. Gurbuz and C.O. Ozkan
Volume: 
35
Issue: 
3
206
212
Year: 
2 005

The aim of this study was to determine the effects of cultivar and formaldehyde treatment of barley grains on rumen fermentation characteristics using the in vitro gas production technique. Amount of gas produced (mL/g organic matter (OM)) during fermentation was determined after 0, 3, 6, 12, 24, 48, 72 and 96 h of incubation in buffered rumen fluid. The gas production kinetics were described using the equation: y = A {1- exp [- b (t-T) - c (√t - √T)]} where b and c are the initial gas production rate constant (h-1) and later gas production rate constant (h-1/2), respectively. Cultivar and formaldehyde treatment had significant effects on gas production kinetics. Total gas production (A) ranged from 389.9 to 410.8 (mL/g OM) with the cultivar, Esterel, producing the largest volume of gas of the cultivars. Due to low gas production rates at 3, 6 and 12 h of incubation the cultivars, Viva and Cecilla, took the longest to produce 50% of their total volume of gas. Formaldehyde treatment reduced the rate (µ) of gas production at 3, 6 and 12 h of incubation, and the total volume of gas (A), but increased the time (h) to produce 50% of A and reduced the time (h) to produce 95% of A. The reduction in gas production ranged from 33.3 to 51 mL/g OM with 6 h incubation showing the highest decrease in gas production. It is concluded that formaldehyde treatment may provide an opportunity to manipulate the site of digestion of barley grain in the digestive tract of ruminants. Through the selection of suitable cultivars and through formaldehyde treatment the nutritional and health problems associated with the fermentation of barley grain in the rumen could be reduced.

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En un plano paralelo los disímiles testimonios de curaciones tanto por parte de los científicos que las presencian como de la boca de los sanados es otra razón que se levanta aplastando toda lógica que intente derribar la acupuntura. Es en estas dos evidencias principales donde no sólo se erigen los defensores sino también los críticos. Al parecer parte de la comunidad científica entiende que aceptar estas alternativas médicas sería aceptar la concepción taoísta del mundo y todo lo que esto implica, pues al basar sus métodos en la energía que emana del universo hacia el hombre, la Medicina Tradicional y Natural se emparenta irremediablemente con la religión que le dio origen. Este aviso fue puesto el 23 de mayo de comprar cialis cialis 2013.