动物营养学报2019，Vol.31Issue(9)：4092-4098,7.DOI:10.3969／j.issn.1006⁃267x.2019.09.021
对肉羊养殖的全混合日粮营养标准的初步研究
Preliminary Study on Total Mixed Ration Nutrition Standards for Mutton Sheep Breeding
摘要
Abstract
This experiment was aimed to investigate the effects of total mixed ration ( TMR) with different par?ticle sizes on growth performance, feeding behavior and digestibility and metabolism of mutton sheep, and ini?tially establish a reasonable TMR production standard for large?scale fattening mutton sheep farms. This study included two experiments, and in each experiment, twenty?four healthy weaned male sheep aged about 4 months were selected and weighed ( 35.4 ± 5.1) kg. They were randomly divided into 4 groups, 6 sheep in each group, and kept in a single column. The experiment used a 4×4 Latin square design to feed four different TMR ( mixing time were TMR1: leymus chinensis 20 min, alfalfa 16 min, peanut stalk 12 min, corn silage 5 min; TMR2: leymus chinensis 30 min, alfalfa 24 min, peanut stalk 18 min, corn silage 5 min; TMR3: ley?mus chinensis 40 min, alfalfa 32 min, peanut stalk 24 min, corn silage 5 min; TMR4: leymus chinensis 50 min, alfalfa 40 min, peanut stalk 30 min, corn silage 5 min, respectively). Each experiment was divided into 4 periods, 15 days in each period. The results showed as follows: 1) with the increase of mixing time, Penn state forage and TMR particle separator ( PSPS) dry matter contents at level 1 was decreased, levels 2, 3 and 4 were increased, and the particle size of TMR were reduced gradually; the contents of physical effective neutral detergent fiber ( peNDF)8.0 and peNDF1.18 were significantly reduced ( P＜0.01). 2) In experiment 1, the TMR particle sizes had no significant effects on the daily gain and feed／gain of mutton sheep ( P＞0.05) ; the TMR particle sizes had no significant effect on the total feeding time of mutton sheep ( P＞0.05) , but had a significant effect on the chewing time and ruminating time of mutton sheep ( P＜0.05). With the de?crease of TMR particle size, the ruminating time and the chewing time were gradually shortening.3) In experi?ment 2, TMR with different particle sizes had no significant effects on the apparent digestibility of day matter, organic matter, neutral detergent fiber, acid detergent fiber and crude protein of mutton sheep ( P＞0.05 ). TMR with different particle sizes had no significant effect on crude protein intake, manure crude protein content and urine crude protein content ( P＞0.05). As the TMR particle size decreased, the intake of peNDF8.0 ten?ded to decrease. In conclusion, under the conditions of this experiment, TMR4 is more suitable for fattening mutton sheep. The corresponding mixing time are: leymus chinensis 50 min, alfalfa 40 min, peanut stalk 30 min, and corn silage 5 min.The corresponding dry matter content of the PSPS are: 6.00%of level 1, 30.23%of level 2, 44.62% of level 3, 19.15% of level 4, and the corresponding peNDF content are: peNDF8.0 14.67% and peNDF1.18 32.79%.[Chinese Journal of Animal Nutrition, 2019, 31(9):4092?4098]关键词
TMR/肉羊/生长性能/消化代谢/宾州筛Key words
TMR/mutton sheep/growth performance/digestion and metabolism/PSPS分类
农业科技引用本文复制引用
李德鹏,王尚尚,高月锋,秦鲁蓬,富俊才..对肉羊养殖的全混合日粮营养标准的初步研究[J].动物营养学报,2019,31(9):4092-4098,7.基金项目
国家肉羊产业技术体系项目( CARS⁃38) （ CARS⁃38）
