Influence of manure application during cultivation on <i>in vitro</i> gas and post incubation parameters of nine <i>Pennisetum purpureum</i> varieties

Abstract

Forages are generally available in the tropics yet the issue related with their utilization is low efficiency and nutritional contents whereby seasonal variations in pasture productivity were the significant constraint to their availability for use throughout the year. This research was carried out to evaluate the Influence of manure application during cultivation on in vitro gas production and post-incubation parameters of nine (9) different Pennisetum purpureum varieties. The experiment was a 9 x 3 factorial arrangement in split plot design which comprises of nine (9) P. purpureum varieties (Abeokuta 1, Abeokuta 2, F1 Hybrid, Green Local, Purple Local, Sugarcane, South Africa, S13 and S15) and three (3) manure types (control, swine and cattle). Results showed that the in vitro gas production of different P. purpureum varieties as affected by manure type were significant (p < 0.05). Unfertilized varieties had the highest volume of gas produced (17.14ml/200mgDM) at the end of the 48 hours incubation periods and the green local variety recorded the gas volume of 18.33ml/200mgDM at the end of the 48hours incubation. The post incubation parameters showed that manure type (p>0.05) had no effect on the short chain fatty acid (SCFA) and Metabolizable energy (ME) in the varieties of P. purpureum while the values for organic matter digestibility (OMD) was significantly (p < 0.05) ranged from 33.68% in unfertilized varieties to 35.72% when swine manure was applied. It is concluded that green variety of P. purpureum will be the best for ruminant feeding in this study.