粉碎粒度对生长猪颗粒饲料加工质量及其生长性能的影响  

Effects of Particle Size on Pellet Feed Processing Quality and Growth Performance of Growing Pigs

作　　者：段海涛[1] 秦玉昌 于纪宾[1] 倪海球[1] 李军国[1] 

机构地区：[1]中国农业科学院饲料研究所,北京100081 [2]农业部食物与营养发展研究所,北京100081

出　　处：《动物营养学报》2015年第7期2038-2043,共6页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：公益性行业(农业)科研专项项目"饲料高效低耗加工技术研究与示范"(201203015);"十二五"国家科技支撑计划课题"安全优质饲料生产关键技术研发与集成示范"(2011BAD26B04)

摘　　要：本试验旨在研究不同粉碎粒度对生长猪颗粒饲料加工质量及其生长性能的影响。试验分别选用1.5、2.0、2.5和3.0mm筛片孔径对混合后饲料原料进行粉碎,得到几何平均粒径分别为：595、626、758、856μm的饲料原料,试验饲粮参照配方进行调质制粒。试验选取80头平均体重为（27.5±0.5）kg的“大×长×杜”三元杂交猪,按照体重接近和性别随机置于4个组,每个组5个重复,每个重复4头猪。4组分别饲喂4种粉碎粒度饲粮,试验周期为8周。试验结果表明：随着筛片孔径从1.5mm增大到3.0mm,每吨原料粉碎能耗从7.41kW·h降低到4.36kW·h;1.5mm组淀粉糊化度显著高于2.5和3.0mm组（P〈0.05）,与2.0 mm组差异不显著（P〉0.05）;2.0mm组粗蛋白质体外消化率显著高于3.0mm组（P〈0.05）;1.5 mm组颗粒硬度显著高于其他组（P〈0.05）;1-4周内,2.0mm组生长猪平均日增重显著高于其他组（P〈0.05）,料重比显著低于其他组（P〈0.05）。本试验结果表明,粉碎机筛片孔径为2.0mm时颗粒饲料质量最好,生长猪的生长性能最佳。This experiment was conducted to study the effects of the different particle size on pellet feed processing quality and growth performance of growing pigs. In this research, four kinds of apertures were used to crush raw material, so as to form 4 samples with different particle sizes, which were 595, 626, 758, 856 p,m, then tempered and pelleted the feed raw material. Eighty ＇ LargewhitexLandrancexDuroc＇ growing pigs with average body weight of （27.5±0.5） kg were allocated into four groups balanced for sex and body weight, with 5 replicates per group and 4 pigs per replicate. Pigs in 4 groups were fed four different diets, respectively. The duration of the experiment was 8 weeks. The result showed as follows： as the screen aperture increased from 1.5 to 3.0 mm, grinding energy consumption of raw material per ton was reduced from 7.41 to 4.36 kW · h. Starch gelatinization degree of 1.5 mm group was significantly higher than that of 2.5 and 3.0 mm group （P〈0.05）, but with no significant difference with that of 2.0 mm group （P〉0.05）. The crude protein digestibility in vitro of 2.0 mm group was significantly higher than that of 3.0 mm group （P〈0.05）. Hardness of pellet of 1.5 mm group was significantly higher than that of the other groups （P〈0.05）. During 1 to 4 weeks, average daily gain （ADG） of growing pigs of 2.0 mm group was significantly higher than that of the other groups （P〈0.05）, the ratio of feed to gain （F/G） was significantly lower than that of the other groups （P〈0.05）. In conclusion, when the aperture of grinder is 2.0 mm, feed quality and the growth performance of growing pigs are the best.

关 键 词：颗粒饲料质量 粉碎粒度 生长猪 生长性能 

分 类 号：S816.9[农业科学—饲料科学] S828[农业科学—畜牧学]