Fresh and artificially dried forages ruminal degradability. III. Elephant grass (Pennisetum purpureum Schum) degradabilities in four growth stages. Through "in situ" dacron bags in rumen fistulated steers
Keywords:Forage, Digestibility, Pennisetum purpureum, Cattle
This work studied DM, CP and CF ruminal degradability, through nylon-bag technique "in situ", of Napier grass (Pennisetum purpureum Schum) on several growth stages. Eight rumen fistulated steers were used to compare 4 treatments: A = 72 days and 1,30 m high; B = 105 days and 2,35 m high; C = 135 days and 3,25 m high and D = 161 days and 3,25 m high, considering age and stand of grass regrowth. Experimental design was completely randonmized, and the results showed that DM, CP and CF rumen degradabilities decreased linearly with grass growth (p < 0,01). Degradability values for 48 h incubation time were DM: 56,02%; 47,71%; 43,57% and 38,76%; CF = 47,37%, 41,7%, 32,28% and 22,92% for A, B, C and D treatments. Concerning CP, only A, B and C stages were analyzed: with the following results: 53,59%, 35,32% and 26,42% for 48 h of incubation time. Rumen volume increased linearly with grass age (p <0,01) and rumen turn-over was higher for A (p < 0,05).
How to Cite
The journal content is authorized under the Creative Commons BY-NC-SA license (summary of the license: https://