Optimalisasi kualitas silase daun rami (Boehmeria nivea, L. GAUD) melalui penambahan beberapa zat additif

Abstract

A research to study the influence of additives and ensiling times on ramie leaves silage qualities for ruminant have been studied in vitro using completely and block factorial 3 x 3 designs. Three types of water soluble carbohydrate (WSC) and dry matter sources as additives (A1 = cassava meal, A2 = pollard and A3 = corn meal) and three ensiling times (B1 = 28, B2 = 35, and B3 = 42 days) have been investigated. The degradability of organic matter to form VFA and protein to form NH3 were measured according to General Laboratory Procedure (1966), while the rate organic matter fermentation was measured follow the procedure of Menke et al., (1979). Value of pH and protein degradability were measured follow procedure of Naumann dan Bassler (1997) and Carro dan Miller (1999). The variable of this research consist of physical characteristic and fermentation parameters, fermentability and digestibility of the silages by ruminant have been determined in vitro. In generally, physical characteristic of ramie leaf silage are green brown, lactic acid odor and softer texture. Ramie leaf silage with additive corn meal (A3) have breakage. pH parameters showed that A1 acidified the silages faster than the A2 ones (3,62 vs 5,13). High pH of A3 (7,35) treatment was caused by the rought texture of corn meal used in this experiment. The silages were categorized as fermentable and high digestible feeds for ruminants (NH3 > 8,89 mM, VFA > 94.88 mM). Production gas for 24 hours incubation rumen liquor and estimation of organic matter digestibility (OMD) after 6 weeks ensiling time were around 72% and 50%.