Guinea grass is considered as the most extensively distributed fodder grass and it serves as one of the main feed source in small scale ruminant production systems in Sri Lanka because of its abundant production as well as its accessibility around the year1. But, due to the inferior digestibility of fiber fraction, its optimum use by ruminants has become restricted which has led towards low nutrient availability to animal2.
Hence, improving the digestibility of this fiber component has become the huge research interest of ruminant nutritionists. Therefore, several procedures have been established and among these methods, administration of microbial enzymes including cellulases as well as xylanases has become popular among researchers.
Due to the successive positive results like enhanced rumen fermentation parameters achieved by researches both in vitro3 as well as in vivo, exogenous enzymes are now considered as popular commodities to provide practical benefits to the ruminant industry. Enzyme feed specificity is regarded as a fundamental reason for variations in outcomes; therefore, it is crucial to assess enzyme activity on different feedstuffs.
Accordingly, a new research was conducted in order to study the impacts of supplementation of cellulase enzyme on diet digestibility as well as growth performance of female goats (ewes) that were fed with wild guinea grass. For this purpose, 8 ewes having age of 18 months were used4.
Scientists divided the ewes into 2 groups on the basis of body weight and randomized within the block for the treatment with Exogenous Fibrolytic Enzyme and for the control. This experiment was continued for 180 days and in both trials, measurements of body weight were taken in two-week intervals and total feces and spot urine sampling were conducted for seven days4.
At the end of this experiment, it was found that the exogenous fibrolytic enzyme, cellulose improves the feed value, as well as efficient use of wild guinea grass, was also exhibited as the tested goats showed significantly enhanced growth as well as improved intake and digestibility parameters and urinary allantoin production.
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