动物营养学报2017，Vol.29Issue(11)：4162-4170,9.DOI:10.3969/j.issn.1006-267x.2017.11.040
花生秧作为肉用绵羊单一粗饲料有效能值的测定与估测
Determination and Estimation of Available Energy Value of Peanut Vine as Single Straw Feed for Mutton Sheep
摘要
Abstract
This study aimed to determine and estimate available energy value of peanut vine for mutton sheep using substitution and extrapolation methods, and find a proper substitution proportion of peanut vine in diet in substitution method, for the purpose of providing a reference for determination and estimation of available ener-gy value of single straw feed. Fifty four healthy adult crossbreed wethers ( Dorper×small-tailed Han F1) with body weight of (45.00±1.96) kg were used in a randomized block design. The wethers were divided into nine groups with six replicates per group and 1 sheep per replicate. Sheep in different groups were fed basal diet, full peanut vine diet and experimental diets using different proportions ( 10%, 20%, 30%, 40%, 50%, 60%, and 70% respectively) of peanut vine to substitute basal diet. The adaptation period lasted for 10 d;the experi-mental period lasted for 9 d, including 3 d of gas metabolism test and 6 d of digestion and metabolism test. The results showed as follows:1) no significant difference was found in dry matter ( DM) apparent digestibility a-mong 20%, 30%, 40% groups and full peanut vine diet group (P>0.05), while these groups were signifi-cantly higher than the other groups (P<0.05). Apparent digestibility of organic matter (OM) of full peanut vine diet group had no significant difference with that of 20% group ( P>0.05) , and was significantly higher than other groups (P<0.05). Apparent digestibility of gross energy (GE), neutral detergent fiber (NDF), acid detergent fiber ( ADF) and ether extract ( EE) of full peanut vine diet group were significant higher than those of 10% group ( P<0.05) , while apparent digestibility of crude protein ( CP) was significantly lower than that of 10% group ( P<0.05) , and all of them had no significant differences with the other groups ( P>0.05) . 2) Digestive energy (DE) and metabolizable energy (ME) of peanut vine showed a similar trend, which was full peanut vine diet group ( 8. 57 and 6. 69 MJ/kg DM) had no significant difference with 20% ( 8. 22 and 6.58 MJ/kg DM), 30% (8.02 and 6.50 MJ/kg DM), and 40% groups (8.10 and 6.52 MJ/kg DM), but these groups were significantly higher than the other groups. 3) The 'true' ME of peanut vine calculated by extrapolation method was 6.62 MJ/kg DM, which was close to ME form substitution method. It is concluded that the substitution method can be used for the calculation of DE and ME of peanut vine as a single forage for mutton sheep;the appropriate substitution proportion of peanut vine ( straw feed) in diet is 20% to 40% for de-termination of available energy value.关键词
肉羊/能量估测/代谢能/套算法/花生秧/有效能值Key words
mutton sheep/energy determination/metabolizable energy/substitution method/peanut vine/a-vailable energy value分类
农业科技引用本文复制引用
赵明明,马涛,赵江波,邓凯东,肖怡,马俊南,毛建红,贾鹏,刁其玉..花生秧作为肉用绵羊单一粗饲料有效能值的测定与估测[J].动物营养学报,2017,29(11):4162-4170,9.基金项目
国家自然科学基金"绵羊甲烷排放的粪便反射特征光谱研究"(41475126) （41475126）
国家肉羊产业技术体系饲养标准岗位(CARS-39) （CARS-39）
