Hyun Y, Ellis M, McKeith F K, Wilson E R
Department of Animal Sciences, University of Illinois, Urbana 61801.
J Anim Sci. 1997 Jun;75(6):1443-51. doi: 10.2527/1997.7561443x.
The feed intake pattern and growth performance of boars, barrows, and gilts fed diets differing in lysine and protein content were measured on 120 crossbred pigs from 27 (SD 3.7) to 81.5 (SD 9.2) kg live weight. The pigs were housed in eight mixed-sex groups with five pigs of each sex in each group. They were fed from an electronic feed station that recorded individual meal sizes and the time and duration of visits to the feeder for each animal in the group. Four dietary treatments were compared. During the grower period (27 to 55 kg), diets ranged in lysine content form .98 to 1.31%; for the remainder of the study, lysine content was .88 to 1.18%. Barrows had a greater (P < .01) number of meals per day than the other two sexes (7.4 vs 7.0 vs 7.0 +/- .10, respectively), but there were no significant differences among sexes for daily feed intake or other feed intake traits. Daily feed intake increased with dietary lysine content, largely because of increased meal sizes resulting from longer feeder occupation times at each visit. Visits to the feeder were greatest between 0900 and 1100 and lowest between 2000 and 0400. Correlations between feeding pattern and growth traits were relatively low. Repeatabilities of feeding pattern traits were generally higher when measured over shorter time periods. These results suggest a change in feeding behavior with increasing dietary lysine levels and a relatively small effect of sex on feeding pattern for mixed-sex groups of 15 pigs fed from a single electronic feed station.
对120头体重从27（标准差3.7）到81.5（标准差9.2）千克的杂交猪进行了测量，以研究饲喂赖氨酸和蛋白质含量不同的日粮对公猪、阉公猪和后备母猪的采食量模式和生长性能的影响。这些猪被饲养在8个混合性别组中，每组每种性别各有5头猪。它们通过一个电子饲喂站进食，该饲喂站记录了每组中每头动物的单次采食量以及访问饲喂器的时间和时长。比较了四种日粮处理方式。在生长育肥期（27至55千克），日粮赖氨酸含量范围为0.98%至1.31%；在研究的剩余阶段，赖氨酸含量为0.88%至1.18%。阉公猪每天的采食次数比其他两种性别更多（P < 0.01）（分别为7.4次对7.0次对7.0 ± 0.10次），但在日采食量或其他采食量性状方面，不同性别之间没有显著差异。日采食量随着日粮赖氨酸含量的增加而增加，这主要是由于每次访问时在饲喂器停留时间延长导致采食量增加。访问饲喂器的次数在09:00至11:00之间最多，在20:00至04:00之间最少。采食模式与生长性状之间的相关性相对较低。当在较短时间段内测量时，采食模式性状的重复性通常更高。这些结果表明，随着日粮赖氨酸水平的增加，采食行为会发生变化，并且对于从单个电子饲喂站采食的15头猪的混合性别组，性别对采食模式的影响相对较小。
