不同粒径颗粒饲料对生长猪采食行为的影响

Effects of different particle size pellets diets on feeding behavior of growing pigs

为探索不同粒径颗粒饲料对生长猪采食量和采食偏好的影响,分别采用3.2 mm和4.2 mm孔径的环模生产颗粒饲料进行试验。试验一选取体重45 kg左右的杜×长×大三元杂交生长猪40头,根据公母比例平均分为4组,每组10头,试验期12 d,第1~3 d饲喂粉料,第4~6 d饲喂3.2 mm粒径颗粒饲料,第7~9 d饲喂4.2 mm粒径颗粒饲料,第10~12 d饲喂3.2 mm粒径颗粒饲料,每天统计采食量。试验二选取体重50 kg左右的杜×长×大三元杂交生长猪40头,根据公母比例平均分为4组,每组10头,每组放置2个3孔不锈钢干式自动料槽分别投放3.2 mm和4.2 mm粒径的颗粒饲料,每天统计生长猪对2个料槽中饲料的采食量,试验期为7 d。结果表明,在试验一的4个采食阶段,每栏生长猪对饲料的日均采食量分别为17.49、18.4、20.23和18.27 kg,生长猪对4.2 mm粒径颗粒料的日均采食量明显高于粉料和3.2 mm粒径颗粒料,差异极显著(P<0.01)。试验二每栏猪对4.2 mm和3.2 mm粒径颗粒饲料的日均采食量分别为11.62 kg和9.69 kg,二者比较差异极显著(P<0.01)。在3.2 mm粒径和4.2 mm粒径颗粒饲料的硬度分别为3.07 kg和4.20 kg的情况下,生长猪对4.2 mm粒径颗粒料的采食量大于3.2 mm,同时对4.2 mm粒径颗粒料的采食偏好性优于3.2 mm。

In order to explore the effect of different particle sizes of pellet feed on feed intake and feed preference of growing pigs, the pellet feed was produced by ring die with diameters of 3.2 mm and 4.2 mm, respectively. The experiment one, forty crossed-bred(Duroc×Landrace×Yorkshine) pigs, weighing an average of 45 kg, according to the proportion of male and female, were randomly assigned to four dietary treatments with 10 pigs with each pen, the test period was 12 days, feeding powder on 1~3 days, feeding 3.2 mm pellet feed on 4~6 days, feeding 4.2 mm pellet feed on 7~9 days, 3.2 mm pellet feed on 10~12 days, recording feed consumption every day. The experiment two, forty crossed-bred(Duroc×Landrace×Yorkshine) pigs, weighing an average of 50 kg, according to the proportion of male and female, were randomly assigned to four dietary treatments with 10 pigs with each pen, two automatic feed tanks were placed in each group to put pellet feed with particle size of 3.2 mm and 4.2 mm respectively, counting the feed intake of growing pigs in the two feed tanks every day, the test period was 7 days. The results showed that the average daily feed intake of growing pigs in each pen was 17.49,18.4,20.23 and 18.27 kg, respectively, in the four feeding stages of Experiment 1,the daily average feed intake of growing pigs with 4.2 mm particle size was significantly higher than that of powder and 3.2 mm particle size(P<0.01). In experiment 2,the average daily feed intake of 4.2 mm and 3.2 mm particle feeds in each pen was 11.62 kg and 9.69 kg, respectively, and the difference was extremely significant(P<0.01). Under the condition that the hardness of 3.2 mm particle size and 4.2 mm particle size was 3.07 kg and 4.20 kg, respectively, the feed intake of growing pigs for 4.2 mm particle size was greater than 3.2 mm. The feeding preference was better than 3.2 mm.