复合秸秆颗粒饲料生产工艺优化  

Optimized research on compound straw pellet feed production process

作　　者：张海龙 赵芳芳[1] 左志 马垭杰 石斌刚 王鹏 张伟[1] 李少斌[1] 赵志东[1] 胡江[1] ZHANG Hailong;ZHAO Fangfang;ZUO Zhi;MA Yajie;SHI Bin'gang;WANG Peng;ZHANG Wei;LI Shaobin;ZHAO Zhidong;HU Jiang(College of Animal Science and Technology,Gansu Agricultural University,Lanzhou 730070,Gansu,China;Zhangye Grassland Workstation,Zhangye 734000,Gansu,China)

机构地区：[1]甘肃农业大学动物科学技术学院,甘肃兰州730070 [2]甘肃省张掖市草原工作站,甘肃张掖734000

出　　处：《草业科学》2020年第4期812-818,共7页Pratacultural Science

基　　金：国家重点研发计划课题任务(2017YFD0502001);甘肃省基础研究创新群体项目(17JR5RA137)。

摘　　要：为了提高牧草类颗粒饲料的生产效率、产品质量和商品化水平,以玉米(Zea mays)秸秆和苜蓿(Medicago sativa)干草为原料(按照质量比1∶1),研究复合秸秆颗粒饲料的最优生产工艺。首先采用单因素试验设计,设置7个总水分含量,分别为8%、10%、13%、16%、19%、22%和25%。通过测定复合秸秆颗粒饲料的成型率筛选出较适宜的水分含量。结果表明,随着水分含量的提高,复合秸秆颗粒饲料的成型率呈下降趋势,总水分含量为8%的成型率显著高于其他处理组(P<0.05)。然后采用L9(34)设计正交试验,以总水分含量(8%、10%和13%)、原料粉碎粒度(4、6和8 mm)和模孔直径(6、7和9 mm)为影响因素,以成型率、硬度和密度为检测指标,筛选出复合秸秆颗粒饲料的最优生产工艺参数。影响复合秸秆颗粒饲料质量的主次因素为模孔直径>原料粉碎粒度>水分含量;复合秸秆颗粒饲料生产工艺的最优组合为模孔直径7 mm,粉碎粒度8 mm,总水分含量8%。To improve the production efficiency,product quality,and commercialization level of forage pellet feed,this trial used corn stalk and alfalfa hay as raw materials(by quality ratio 1∶1)to evaluate the optimized production process of compound straw pellet feed.Firstly,the effect of moisture on the molding rate of mixed straw powder was examined using the single factor test design.The moisture was detected as 8%,10%,13%,16%,19%,22%,and 25%.The results indicated that the molding rate of compound straw pellet feed showed a downward trend with increased moisture content.The molding rate of pellets was significantly higher than that of other treatment groups,especially for the no moisture addition treatment(P<0.05).Secondly,the optimal production process parameters for the compound straw pellet feed were evaluated by using the L9(34)design orthogonal test,moisture(8%,10%,and 13%),raw material pulverization particle size(4,6,and 8 mm),and mold hole diameter(6,7,and 9 mm);the molding rate,hardness,and density were used as indexes of influencing factors.The order in which the influencing factors affected the quality of compound straw pellet feed was mold hole diameter,raw material pulverization particle size,and moisture addition.The optimal production process parameters were 7 mm mold hole diameter,8 mm pulverization particle size,and 8%moisture.

关 键 词：玉米秸秆 苜蓿干草 颗粒饲料 生产工艺 

分 类 号：S816[农业科学—饲料科学]