Effects of feeding unhulled rice soft-grain-silage on lactation performance of dairy cows
2016
Wada, T. (Fukui Prefectural Livestock Experiment Station (Japan)) | Nishimura, Y.
Nowadays, it is important to promote utilization of feed rice in dairy farm. Six Holstein cows in mid-to-late lactation were used in 3*3 Latin square design to examine the effects of large supply of unhulled rice soft grain silage(rice SGS) with separate feeding on lactation performance. Diets contained rice SGS at the level of 0%, 27% and 46% in the concentrate as a substitute of formula feed, respectively. As a result, dietary treatments did not affect dry matter intake, milk yield and milk composition. Rumen fluid characteristics and blood composition were not affected by feeding rice SGS. However, protein efficiency of use and feed efficiency were lower (p<0.05) at the level of 46% rice SGS. Our results indicate that unhulled rice SGS is an available replacement for feed mixture in mid-to-late lactation cow diets, and that it can be included in rations to the level of 27% of rice SGS in the concentrate (16% of entire feed) without adverse effects on milk production and health. Ruminal in situ disappearance rate of rice SGS is faster than that of crushed unhulled rice, therefore it should be taken attention to feeding order and proportion of rumen degradable protein.
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