The Effect of Pomegranate Peel on Soybean Meal Protein Degradation and Milk Production in Dairy Cows
The Effect of Pomegranate Peel on Soybean Meal Protein Degradation and Milk Production in Dairy Cows
Soliman Mohammed Soliman1*, Mohsen Mahmoud Shoukry2, Ahmed Mohammed El-Okazy1, Ahmed Mahmoud El-Morsy1, Mahmoud Mohammed Soliman1
ABSTRACT
Soybean meal is the most important protein source used to fodder mixtures. However, more than 60% of the protein is degradable in the rumen. Several attempts have been made to reduce protein degradation. This experiment was carried out to investigate the effects of different supplementation levels of pomegranate peel (PP) on the in situ degradation of soybean meal (SBM) by using three ruminally cannulated. In order to determine the optimal levels of PP to reduce the degradation of SBM, for evaluated their effects on in vitro methane production, in vivo ruminal fermentation and milk production using eighteen lactating crossbred Friesian cows that were randomly assigned to three groups. The first group contains untreated SBM, while the second and third groups contain SBM treated with pomegranate peel (PP) at levels of 200 and 250 gm / kg of SBM, respectively. All levels of PP treated to SBM in the first experiment had a positive effect on SBM ruminal degradability after 72 h of incubation. But the optimal levels were 200 and 250 g pp/kg SBM (PP), which were significantly lower in degradation than the other levels. This reduction in the extent of dry matter (DM) and crude protein (CP) degradation was mainly due to a marked decrease in the immediately degradable fraction (a), the potential fraction degradation (b), and a lower rate of degradation. Diets containing SBM treated with 200 or 250 gm of PP reduced in vitro gas production, methane production, and TVFA and ammonia concentrations without effect on physiological rumen activity. Moreover, milk yield and milk composition were not affected. However, the concentration of milk urea nitrogen (MUN) was significantly decreased. Overall, these results indicate that treated SBM with levels of 200 or 250 PP reduced its degradability in the rumen more than untreated SBM. Also, recorded decreased gas and methane production had no effect on milk production.
Keywords | Soybean meal, Rumen degradability, Methane production, Milk yield
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June 2022
Vol. 10, Iss. 6, Pages 1189-1422
