动物营养学报2019，Vol.31Issue(9)：4194-4199,6.DOI:10.3969／j.issn.1006⁃267x.2019.09.032
粉碎粒度对氧弹式量热法测定全混合日粮总能的影响
Effects of Grinding Particle Size on Gross Energy of Total Mixed Ration Measured by Oxygen Bomb Calorimetry
摘要
Abstract
This experiment was to study the effect of grinding particle size on gross energy ( GE ) of total mixed ration ( TMR) measured by oxygen bomb calorimetry. Fifteen samples of total mixed ration ( TMR) for dairy cow were selected and pulverized to 18, 40, 60 and 100 mesh, respectively. The GE of each sample was determined by oxygen bomb calorimeter, the contents of nutrients such as dry matter ( DM) , crude fat ( EE) , ash ( Ash) and crude fiber ( CF) were determined by national standard method, and the GE was calculated ref?erence to the NY／T 34—2004 method, to compare the difference in GE with different degrees of comminution and to determine the optimum grinding particle size for the determination of GE of TMR by the oxygen bomb calorimetry. The results showed that the GE of the 18 and 40 mesh grinding groups was lower, which was sig?nificantly lower than that of the 60, 100 mesh grinding groups and the GE calculated by national standard method ( P＜0.01) ; the GE of 60 and 100 mesh grinding groups was higher, compared with the GE calculated by the national standard method, there was no significant difference ( P＞0.05) ; the relative average deviation of the 18 and 40 mesh grinding groups was higher than that of the 60 and 100 mesh grinding groups. It is shown that when the measured TMR is subjected to 60 or 100 mesh pulverization, the GE measured by oxygen bomb calorimetry is more accurate and has higher precision, and GE which is calculated by the national stand?ard method can be substituted for each other. Comprehensive analysis reveals that the TMR for dairy cow is pulverized to 60 mesh can meet the need of GE determination by oxygen bomb calorimetry.[ Chinese Journal of Animal Nutrition, 2019, 31(9) :4194?4199]关键词
全混合日粮/粉碎粒度/氧弹式量热仪/总能Key words
TMR/grinding particle size/oxygen bomb calorimeter/gross energy分类
农业科技引用本文复制引用
蔡阿敏,李鹏涛,范逸婷,李改英,高腾云..粉碎粒度对氧弹式量热法测定全混合日粮总能的影响[J].动物营养学报,2019,31(9):4194-4199,6.基金项目
现代奶牛产业技术体系建设专项资金( CARS⁃36) （ CARS⁃36）
中南地区奶牛粪尿及特性产生系数和主要水污染源普查项目(30900292) （30900292）
