BIOCONVERSION OF CORN STRAW AND SORGHUM STRAW WITH PHANEROCHAETE CHRYSOSPORIUM AND ITS EFFECTS TOWARDS LOCAL SHEEP CARCASS WEIGHT AND THE CARCASS PERCENTAGE

Sirajuddin Abdullah

Abstract
Bioconversion of corn straw and sorghum straw by using Phanerochaete chrysosporium fungus was done to improve the nutrition quality as well as the influence of corn straw and sorghum straw towards the changes of fiber components, the quality of nutrition, rumen ecosystem, and the performance of local sheep. This research was done in two trials, which were the laboratory and in field trial, using Randomized Block Design (RBD) 2 X 4 factorial with three replications. The first factor was the types of straw (corn straw and sorghum straw), the second factor was the dosage of Phanerochaete chrysosporium fungus inoculums (0% v/w (Pc₀), 2% v/w (Pc₁), 4% v/w (Pc₂) and 6% v/w (Pc₃). If there was significance, then it was continued with Real Honest Difference Test. The use of inoculums of Phanerochaete chrysosporium fungus in real could improved the carcass weight (11,30%), and the non-carcass weight component (3,82%), carcass percentage (5,71%) but in real decreased the non carcass component (1,60%) in local sheep. There was no interaction between the types of straw with the dosage of Phanerochaete chrysosporium fungusinoculum towards the carcass weight, carcass percentage, the non carcass components weight and the percentage as well as the weight of local sheep carcass. Based on the effect of fermentation of Phanerochaete chrysosporium fungus, 6% v/w (Pc₃) dosage was better as the inoculums of corn straw and sorghum straw, which were able to improved the quality of straw as feed because have enough nutrition as ration replacement for local sheep. In addition, the value of digestibility of fiber and corn straw nutrition components was better than sorghum straw after fermentation using Phanerochaete chrysosporium fungus, and bioconversion straw was better compared to the non bioconversion, as well as able to give a better response towards the weight and carcass percentage of local sheep.

Key words: straw, Phanerocaete chrysosporium, carcass, local sheep