成長低下の要因についての検討 (菜種粕の飼料的利用に関する研究-9,10-)
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In a former report, the author reported the interpretation on the cause of growth depression by the feeding of rapeseed oil meal.Using White Leghorn day-old female chicks at the 15% level of prepress-solvent rapeseed oil meal (RSOM), two experiments were carried out to confirm the above author's interpretation.The results obtained are as follows:1. Significant growth depression was observed on chicks which were fed rations containing RSOM regardless of the adjustment of their energy level (TDN). However, when the energy level of RSOM rations were adjusted to up to that of soybean oil meal control ration, the rate of growth depression somewhat decreased and then the growth rate of chicks appeared to be in parallel with the rate of their feed intake.2. When the intake as well as the energy level of the RSOM rations were adjusted to such same level as compared to those of soybean oil meal control ration, their chick growth rate was the same. Namely, the adverse effects of RSOM on the growth did not revealed, but the inclusion of RSOM in a ration resulted in a significant increase in thyroid weight regardless of the above adjustment.Accordingly, it seemed that there was no relationship between the growth depression of chicks by the feeding of RSOM and their thyroid enlargement apparently.3. These results indicate that the growth retarding effect of dietary RSOM is mainly attributed to that lower energy content and palatability than the other oil meals, e. g. soybean oil meal. And also, the above findings may be useful for practical utilization of RSOM as a component of animal feed.
- 公益社団法人 日本畜産学会の論文
公益社団法人 日本畜産学会 | 論文
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