Avaliação da fração fibrosa e da digestibilidade "in vitro" de diferentes tipos de cama de frangos, em função do tempo de estocagem

Abstract

The present research was conducted by the Digestibility Section of the Zootechnics Department of the Center of Agrarian Sciences of The Universidade Federal do Ceará, (Fortaleza, Brazil), aiming to study the fibrous fraction and the digestibility "in vitro" of the dry matter and of the organic matter and of the organic matter of the chicken flooring based on wood shavings, on elephant grass (Napier variety), on corn cob with straw and on cassava mulch, as a function of storage time. Chicken flooring was usedin chicken beds of the same chicken shed and mound shaped stored in twelve boxes. The samples were collected in the following storage times: 0, 14, 28, 42 and 56 days. After that, it was made a factorial arrangement of 4 x 5, in a totally randomized design with three replications. The constituents of the fibrous fraction for the chicken flooring were found to be: wood shavings, elephant grass (Napier), corn cob with straw and cassava mulch respectively for brute fiber: 41,58; 29,04; 24,84 and 23,07%, fiber in neuter detergent: 72,02; 68,04; 67,42 and 62,35%, fiber in acid detergent: 48,78; 37,91; 31,55 and 35,81%, hemicellulose: 23,42; 30,13; 35,87 and 27,59%, cellulose: 31,47; 31,44; 21,25 and 25,59% and lignin: 14,78; 6,44; 4,01 and 10,36%, the cellulose content as a function of storage times was found to be respectively for the wood shavings: 31,47; 34,82; 33,95; 35,69 and 32,81%, elephant grass (Napier): 31,44; 28,80; 29,72; 32,64 and 29,36%, corn cob with straw: 21,25; 24,71; 27,33; 33,00 and 25,83% and cassava mulch: 25,59; 22,04; 23,49; 25,23 and 24,68%. The Digestibility Coeficients of the dry matter and organic matter were found to be as follows: wood shavings: 45,65 and 38,14%, elephant grass (Napier): 63,23 and 59,57%, corn cob with strow: 68,55 and 65,69% and cassava mulch: 60,03 and 53,47%,respectively.