Quality and feed values of improved silage based on rice straw, rape and formic acid
1989
Ko, Y.D. | Kwak, J.H. | Song, D.J. | Park, G.B. (Kyongsang National Univ., Chinju (Korea R.). Coll. of Agriculture)
In order to enhance the feeding value of rice-straw, rice straw with different formular of concentrate, rape or formic acid as an additive was ensilaged and evaluated by laboratory method, and by a feeding trial with finishing Korean native cattle. For the evaluation of the silage quality, rice straw and rape were cut into about 3cm and concentrate levels were adjusted to 20, 30, and 40% and kept in a plastic silo of 200kg capacity. Rumen solution was taken from sheep by fistulation and used for digestibility and organic acid analysis. For feeding trial, for 90 days, silages with different formula were kept in trench silo and fed to 12 Korean native finishing cattle weighing 256kg. Lactic acid fermentation was improved by adding higher proportion of concentrate. Digestible crude protein content increased in silages with 0.5% formic acid or with higher proportion of concentrates (p0.05). The pH of rumen solution decreased in the silage with high proportion of concentrate, while lactic acid content increased at the same condition (p0.01). LWG significantly increased to 0.9kg/day in silage-fed cattle. Total DM intake significantly increased in cattle on ordinary rice straw and concentrate, however, feed efficiency (feed consumption over live weight gain) was poor (7.46 vs. 6.13). Requirements of DCP and TDN in traditional fed cattle were 0.65 and 4.41kg/LWGkg and those in silage fed cattle were 0.50 and 3.71kg/LWG kg, respectively
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