不同种类原料粉碎粒度对饲料品质、肉鸡能量利用的影响Effects of Particle Size of Different Feed Materials on Feed Quality, Energy Metabolism of Broilers
陈思淼,闫晓刚,班志彬,徐莹,赵晓东,梁浩,曹满湖
摘要(Abstract):
试验旨在研究玉米、豆粕的粉碎粒度对饲料品质及不同日龄阶段肉鸡生长性能和能量代谢的影响。试验分为两部分,均采用单因素完全随机试验设计。试验饲粮分为玉米、豆粕型两种,玉米型日粮是将玉米分别通过1、2、3 mm粉碎筛片进行粉碎,其他大片原料通过2 mm粉碎筛片;豆粕型日粮是将豆粕分别通过1、2、3 mm粉碎筛片进行粉碎,其他大片原料通过2 mm粉碎筛片。试验选取11日龄肉鸡288只、24日龄肉鸡192只,每个日龄分为6组,前3组用于玉米粉碎粒度试验,后3组用于豆粕粉碎粒度试验,每组8个重复,每个重复4(大日龄)或6(小日龄)只鸡。试验期为6 d(预试期3 d、正试期3 d)。结果表明:(1)玉米、豆粕的几何平均粒径均随筛片孔径增加而增加;相同粉碎筛片孔径下,豆粕的几何平均粒径均大于玉米;玉米的几何平均粒径与筛片孔径存在线性关系:y=90x+359.33(P<0.001,R2=0.983),豆粕的几何平均粒径与筛片孔径存在线性关系:y=110x+359.00(P<0.001,R2=0.990);颗粒饲料硬度随粉碎粒度增加而显著降低(P<0.05)。(2)玉米、豆粕不同粉碎粒度对试验鸡的能量代谢无显著影响。(3)肉鸡11~16日龄时,豆粕组在3 mm粉碎筛片孔径下平均日采食量显著高于1 mm时(P<0.05),玉米、豆粕组都是3 mm粉碎筛片孔径下料重比最低(P<0.05);肉鸡24~29日龄时,玉米及豆粕粉碎粒度对肉鸡平均日增重、平均日采食量、料重比无显著影响(P>0.05)。综上所述,粉碎粒度对饲料品质有显著影响,粉碎粒度对11~16日龄肉鸡的生长性能影响比24~29日龄更为显著,推荐粉碎筛片孔径为3 mm,即玉米、豆粕平均几何粒径分别为638、681μm。
关键词(KeyWords): 粉碎粒度;饲料品质;能量代谢;生长性能;肉鸡
基金项目(Foundation): 吉林省农业科学院创新工程项目[CXGC202107GH];; 家禽能量营养联合研究中心横向委托项目[PENC2021001];; 国家重点研发计划猪禽饲料营养价值精准评定项目[2021YFD1300200]
作者(Author): 陈思淼,闫晓刚,班志彬,徐莹,赵晓东,梁浩,曹满湖
DOI: 10.13302/j.cnki.fi.2023.19.007
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