ペレット,クランブルおよびマッシュ飼料給与時における産卵鶏の摂食行動について
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概要
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The effect of the feed particle size on the feeding behaviour of laying hens was studied. The feed intake, the time spent for eating and the frequency of pecking were observed every two hours in the six hens reared on the same feed in three different formes (size ranges; mash: <1.0, crumbles: 1.0-2.83 and pellets: >2.83mm) in individual cages under the 14L:10D lighting regime. The daily feed intake was not appreciably affected by different formes of the feed, but the time spent for eating significantly shortened as the size of feed increased. As there were no significant differences in the average pecking rate (pecks/min) between each feed, it appears that the difference in the time spent for eating, which depends on the particle size, is attributable to the difference in the feed intake per pecking. On the contrary, the general pattern of diurnal variation in feed intake was not affected by different formes of the feed and a negative correlation was observed between the feed intake ratio (proportion to daily feed intake, %) in the first two hours and the last two hours of lighting. The pecking rate (pecks/min) was high, but the eating rate (g/min) was low during the first four hours of lighting (06:00-10:00a.m.). It is therefore suggested that there are many peckings for leisure during these four hours. The pecking rate significantly decreased and the eating rate significantly increased after the feeding time (10:00a.m.). This indicates that the feeding behaviour is qualitatively changed by feeding stimulus.
- 社団法人 日本畜産学会の論文