Estimation of rumen microbial nitrogen supply using urinary purine derivatives excretion in merino sheep fed by peanut straw

摘要

Small ruminants are important meat source for developing countries and are frequently associated with agriculture and crops production since the small ruminants are often fed with failed, surpluses or waste of agricultural crops; or anything could befound in grazing area, i. e. peanut straw (Budisatria IGS. et al., 2007). This low quality of feeding system rise a question how is the microbial nitrogen supply of those animals, which are very important for ruminant productivity (Singh M. et al., 2007). Cetinkaya et al. (2006) reported that purine derivative technique is one of the accurate method to measure microbial-N flow to intestine in ruminants. Therefore, this research was conducted to evaluate the purine derivatives excretion to estimate microbial protein supply in male and female merino sheep fed peanut straw basal diet.