FERMENTABILITY OF POST DETOXIFIED BITTER CASSAVA PEEL-LEAF (Manihot esculenta (Kruntz) SILAGE INOCULATED WITH Lactobacillus plantarum MONOCULTURE

Abstract

The potent of bitter-variety cassava leaf was importantly great for fulfilling livestock
requirement for feed. The handicap of usage of this cassava is the existence of cyanogenic glucocides that have toxic effect. A two-phases study was conducted with the purpose to investigate ferrnentability of bitter-variety cassava silage made of cassava peel and leaf. The first was defoxification study with Aspergillus niger, and the second phase was ensilage phase with Lactobacillus plantarum. At the first phase study, the usage of six percent of Aspergillus niger was optimal level in decreasing cyanic acid concentration. At the second phase, five kinds of treatments were applied to improve the quality of silage. The results of this study showed that the treatment of L. plantarum to post-detoxified cassava peel and leaf silage increased dry matter digestibility, VFA, N-NH; and microbial protein, however, the inoculation did not affect organic matter digestibility. Dry matter digestibility (DMD) ranged from 33.01 to 40.06 percent, VFA concentration was 208 to 238 mM/L., N-ammonia ranged
from 20.97 to 50.52 mM/L, and microbial protein ranged from 141.81 to 373.45 mg/mL., where as organic matter digestibility (OMD) ranged from 62.88 to 69.79%. The conclusions of this study is that L. plantarum increases silage quality of bitter-variety cassava peel and leaf, in relation with fermentability.