Crecimiento y fracciones de proteínas y carbohidratos de los pastos raygrass (Lolium Hybridum) aubade y boxer en un sistema de producción lechera en el municipio de Subachoque
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2007
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Universidad de La Salle. Facultad de Ciencias Agropecuarias. Zootecnia
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Con el objeto de evaluar el crecimiento, obtener un modelo y analizar la calidad nutricional de una mezcla de raygrasses (Lolium hibridum) aubade y boxer bajo condiciones comerciales en la finca San Jorge en el municipio de Subachoque (Cundinamarca) en una zona de bosque húmedo montano alto, se evaluaron 8 potreros durante 5 meses, se registró disponibilidad de biomasa cada 7 días hasta 70 días. Para el fraccionamiento CNCPS las muestras fueron recolectadas los días 45, 55, 65 y 75 de rebrote. Se evaluaron tres modelos sigmoideos para crecimiento (Gompertz, Logístico y Cacho). Para el fraccionamiento de carbohidratos y proteínas se utilizó el protocolo de Licitra (1996). Para la determinación de las fracciones de los carbohidratos se usó la técnica de degradabilidad in sacco evaluando la degradabilidad de las fracciones de MS, FDN y RIE. La sustracción de las curvas de degradación determinaron las fracciones de carbohidratos (A, B1, B2 y C). La cinética ruminal se obtuvo de la tasa de degradación (kd) y tasa de pasaje (kp) mediante la aplicación del software FITCURVE. Se corrieron las simulaciones en el software CNCPS con los datos obtenidos del fraccionamiento y degradabilidad de los carbohidratos para las edades de 45 y 75 días de rebrote y los períodos de máximas y mínimas precipitaciones. El modelo que ajustó los valores obtenidos de los 8 potreros fue el de Gompertz, encontrando el mayor aumento en la producción de biomasa en g/ms/día hasta el día 74 de rebrote. Durante el estudio se registraron variables ambientales de máximas (>200ml) y mínimas (0,05); sin embargo para los períodos de máximas y mínimas precipitaciones sí hubo diferencias significativas (P
With the purpose to evaluate the growing, to get a model and to analyze the nutritional quality from aubade and boxer raygrass mix (Lolium hibridum) aubdae and boxer under commercial conditions at San Jorge Farm in the town Subachoque (Cundinamarca) on a zone BhmA. There were evaluated 8 pastures during 5 months; biomass availability was examined every 7 days until 70 days. For the fractionation CNCPS the samples were recollected from the days of 45, 55, 65 y 75 of growing. There were evaluated three sigmoidal models for the growing (Gompertz, Logistic, Cacho). For the fractionation of carbohydrates and proteins was used Licitra protocol. To determine the fractions of the carbohydrates were used the method of degradability in sacro evaluating the degradability from the fractions of dry matter, FDN and RIE. The subtraction of the degradation curves determined the fractions of carbohydrates (A, B1, B2 y C). The kinetic ruminal was obtained from the degradation rate (kd) y pasture rate (kp) using the FITCURVE software. The simulations were running into the software CNCPS with the information obtained from the fractionation and degradability of the carbohydrates for the ages of 45 and 75 of regrowing and the periods of maximum and minimum precipitations. The model that was adjusted to the getting values to the 8 pastures was Gompertz finding the greater increase of biomass production en s/ms/day until the day 74 of growing. During the study there were environmental variables from maximum (>200 ml) and minimum (0.05) however there were significant differences for the maximum and minimum precipitation (p
With the purpose to evaluate the growing, to get a model and to analyze the nutritional quality from aubade and boxer raygrass mix (Lolium hibridum) aubdae and boxer under commercial conditions at San Jorge Farm in the town Subachoque (Cundinamarca) on a zone BhmA. There were evaluated 8 pastures during 5 months; biomass availability was examined every 7 days until 70 days. For the fractionation CNCPS the samples were recollected from the days of 45, 55, 65 y 75 of growing. There were evaluated three sigmoidal models for the growing (Gompertz, Logistic, Cacho). For the fractionation of carbohydrates and proteins was used Licitra protocol. To determine the fractions of the carbohydrates were used the method of degradability in sacro evaluating the degradability from the fractions of dry matter, FDN and RIE. The subtraction of the degradation curves determined the fractions of carbohydrates (A, B1, B2 y C). The kinetic ruminal was obtained from the degradation rate (kd) y pasture rate (kp) using the FITCURVE software. The simulations were running into the software CNCPS with the information obtained from the fractionation and degradability of the carbohydrates for the ages of 45 and 75 of regrowing and the periods of maximum and minimum precipitations. The model that was adjusted to the getting values to the 8 pastures was Gompertz finding the greater increase of biomass production en s/ms/day until the day 74 of growing. During the study there were environmental variables from maximum (>200 ml) and minimum (0.05) however there were significant differences for the maximum and minimum precipitation (p
Palabras clave
Ganado lechero, Pastos y forrajes, Producción de leche, Subachoque, Cundinamarca)