摘要
试验旨在探究膨润土添加比例对玉米豆粕混合粉料理化性质和颗粒质量的影响。将玉米和豆粕粉碎后按质量比例6∶4混合,并分别添加0(对照组)、1%、2%、3%和4%的膨润土,测定添加不同比例膨润土后混合粉料的理化特性和制粒后的颗粒质量。结果显示,与对照组相比,2%组、3%组和4%组混合粉料的休止角显著升高(P<0.05),各试验组摩擦角显著降低(P<0.05);随着膨润土添加比例提高,各试验组混合粉料的休止角逐渐升高,摩擦角逐渐降低。各试验组吸水性指数均显著低于对照组(P<0.05),并且随着膨润土添加比例提高呈持续下降的趋势。与对照组相比,3%组和4%组的峰值黏度和崩解值显著降低(P<0.05),糊化温度显著升高(P<0.05)。与对照组相比,各试验组的颗粒耐久指数显著提高(P<0.05),3%组和4%组颗粒硬度显著提高(P<0.05);随着膨润土添加比例提高,吨料电耗呈先上升再下降的趋势,各试验组均显著高于对照组(P<0.05)。研究表明,膨润土对于提升颗粒饲料品质具有积极影响,但会降低混合粉料的流体特性,造成饲料生产的吨料电耗增加,引发饲料制造过程中堵塞机器的问题,阻碍生产效能的提升。因此,在满足动物营养需要和制粒机产能的前提下,可适度加入膨润土改善颗粒饲料的质量,适宜膨润土添加比例为2%。
The experiment aimed to investigate the effects of bentonite addition ratio on the physicochemical properties and particle quality of corn-soybean meal mixed powder.Corn and soybean meal were crushed and mixed in a mass ratio of 6∶4,followed by the addition of 0(control group),1%,2%,3%,and 4%bentonite,respectively.The physical and chemical properties of the mixed powder with bentonite in different addition proportions and the particle quality after pelletizing were determined.The results showed that compared with the control group,the angles of repose of the mixed powder in 2%,3%,and 4%groups were significantly increased(P<0.05),and the friction angles in each experimental group were significantly decreased(P<0.05).As the proportion of bentonite added increased,the angles of repose of the mixed powder in each experimental group gradually increased and the friction angles gradually decreased.The water absorption index of each experimental group was significantly lower than the control group(P<0.05),and it showed a continuous downward trend as the proportion of bentonite added increased.Compared with the control group,the peak viscosity and disintegration value of 3%and 4%groups were significantly decreased(P<0.05),the gelatinization temperature was significantly increased(P<0.05).Compared with the control group,the particle durability index of each experimental group was significantly increased(P<0.05),and the particle hardness of 3%and 4%groups was significantly increased(P<0.05).When the proportion of bentonite added increased,the electricity consumption per ton of material showed a trend of first rising and then falling,and each experimental group was significantly higher than the control group(P<0.05).The study indicates that bentonite has a positive impact on improving pellet feed quality,but it reduces the fluid properties of mixed powder,increases electricity consumption per ton of feed produced,causes machine blockage problems during the feed manufacturing process,and hinders improvement of production efficiency.Therefore,while meeting both animal nutritional requirements and pellet mill production capacity,bentonite can be appropriately added to enhance pellet feed quality,with a suitable inclusion rate of 2%.
作者
隆育瑶
高秋玲
陈芳
杨洁
李俊
沈水宝
LONG Yuyao;GAO Qiuling;CHEN Fang;YANG Jie;LI Jun;SHEN Shuibao
出处
《饲料研究》
北大核心
2025年第17期126-130,共5页
Feed Research
基金
“十四五”国家重点研发计划(项目编号:2021YFD1300300)。
关键词
膨润土
玉米豆粕混合粉料
理化特性
制粒性能
颗粒质量
bentonite
corn-soybean meal mixed powder
physicochemical properties
granulation performance
particle quality
