Comparison of feeding value between fall panicum [Panicum dichotomiflorum] silage and italian ryegrass [Lolium multiflorum] silage for lactating cows
1990
Miaki, T. (Miyazaki Univ. (Japan). Faculty of Agriculture) | Tanaka, S. | Kawamura, O. | Ohashi, T. | Yamauchi, K. | Haga, S. | Hamakawa, H. | Katayama, H. | Misumi, M.
Fall panicum (Panicum dichotomiflorum Michx. cv. Ooita) and Italian ryegrass (Lolium multiflorum Lam. cv. Wasehikari) silages were prepared at the flowering stage and the heading stage, respectively. To evaluate the feeding value of these silages for lactating cows, feeding trials were carried out by switch-back design with 3 periods of each 21 days duration. The Holstein cows were fed the silages ad libitum, with 1 kg of concentrate per 5 kg of actual milk and 2 kg of alfalfa hay cube per cow daily. The principal results obtained were as follows: (1) Italian ryegrass silage was good in fermentation quality, but fall panicum silage was poor. Italian ryegrass silage was higher in TDN content than fall panicum silage, but both silage were almost equal in DCP content. (2) The silage intake for the cows fed Italian ryegrass silage was similar to that for the cows fall panicum silage. The cows fed Italian ryegrass silage produced more milk than the cows fed fall panicum silage, but this difference was not significant. (3) Milk fat content was significantly higher for the vows fed fall panicum silage than the cows fed Italian ryegrass silage. (4) The concentrations of ruminal ammonia of the cows fed fall panicum silage were significantly higher than those of the cows fed Italian ryegrass silage. Ketonic bodies were detected in urine of the cows fed fall panicum silage
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