Degradability and ruminal kinetics in situ of diets with forage corn silage (Zea mays) and green banana residues (Musa paradisiaca) for tropical sheep

Abstract

In the different agricultural productions, food is managed, with supplements such as free grazing. Concentrated feeds offer nutritional needs 365 days a year, and this would not be achieved if the feed depended only on pastures. The objective was to determine the in situ ruminal kinetics and degradability of forage maize silage and green banana residue in different proportions in a base diet. The treatments were T1, corn silage 50% RB 0%; T2 corn silage 45% RB 5%; T3 corn silage 40% RB 10%; T4 corn silage 35% RB 15% and T5 corn silage 30% RB 20%. A DBCA was applied with five treatments and four repetitions for the differences in means, Tukey was used (P>0.05). The material to be ensiled was collected at 90 days of age (Vegetative Stage V8). Green banana residues, rice powder, soybean paste and mineral salts were used. The anaerobic fermentation process lasted 30 days, the samples were dried in a forced air oven at 65ºC for 48 hours, and ground in a Thomas Willy mill with a 2 mm sieve. It was dried in an oven at 65 °C for 48 h. For DISMS and DISMO, a nylon bag was used in four castrated and rumen fistulated cattle. For each run, seven nylon bags 10 x 21 cm and 53 mm pore size were used, with 10 g of ground sample, with 0, 3, 6, 12, 24, 48 and 72 hours. The in situ digestibility of DM and OM increased with 20% inclusion of this residue with an effective degradation of 57.23 and 57.05% in a passage rate (k 0.02). The in situ ruminal degradability parameters of the dry and organic matter of forage maize silage with green banana residues, is a viable alternative using 20% due to the dynamics of ruminal degradation of DM and OM.