Effects of Feed and water Mixture for Finishing Pigs on Eating Speed and Feed Intake.
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概要
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We established the effects of wet/dry feeding on the eating speed of finishing pigs through two experiments: a feeding test (Experiment 1) and a basic test on five types of feed with different mixing ratios of feed and water (Experiment 2).In Experiment 1, wet/dry feeding for pigs in which water and feed were supplied simultaneously was compared with conventional ad libitum feeding in which air-dry feed and water were supplied separately (control section). The ledge type wet/dry feeder and nose operated flap type wet/dry feeder tended to increase daily feed intake in the latter finishing period of pigs than the ad libitum feeder. The eating speed of pigs in wet/dry feeding was significantly higher (P<0.01) than that in control section. In Experiment 2, the composition of feed and water (weight ratio) was varied in mixing ratios: Section A (air-dry feed 1 to water 0), Section B (1:0.5), Section C (1:1), Section D (1:2), and Section E (1:3). Feed intake of pigs for first ten minutes after starting to eat and eating speed (g/min) significantly increased (P<0.01) in the sections of feed and water mixture compared with the section of air-dry feed alone (Section A). The order from greatest to least was as follows: C>D>E>B>A. Significant regressions of the second degree were established between the water content in feed and the eating speed at 60kg, 80kg and 105kg of the pigs' body weights. The eating speed increased most when the water content of feed was 62-69%. No significant differences were observed among sections for the initial eating time, the number of breaks in eating, and average duration of eating.From the above, it was estimated that in wet/dry feeding, the reduced eating time was caused by the increased eating speed, and that the mixing ratios to maximize the eating speed were air-dry feed 1 to water 1.3-1.8.
- 日本養豚学会の論文
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