动物营养学报2015，Vol.27Issue(12)：3931-3939,9.DOI:10.3969/j.issn.1006-267x.2015.12.035
能量水平对生长期陕北白绒山羊生长性能及营养物质消化代谢的影响
Effects of Energy Level on Growth Performance and Nutrient Digestion and Metabolism of Shanbei White Cashmere Goats during Growth Period
摘要
Abstract
This experiment was conducted to study the optimal energy level of Shanbei white cashmere goats during growth period. Thirty two ( half male and half female) healthy 5-month-old goats with similar body weight were selected and divided into 4 groups (Ⅰ, Ⅱ, Ⅲ and Ⅳ) by a single-factor random block design. The crude protein ( CP) level was 11.16%, and groups Ⅰ, Ⅱ, Ⅲ and Ⅳ were fed four diets differed in di-gestive energy (DE) (9.33, 10.49, 11.66 and 12.61 MJ/kg, respectively). The feeding experiment lasted for 60 days, and then digestive and metabolic experiments were conducted for 14 days. The results showed as follows:1) group Ⅲ of ewes had the greatest actual DE intake level ( P>0.05) , the actual DE intake level of rams and the actual CP intake level of ewes in group Ⅲ were the greatest among four groups ( P<0.05) , and the actual CP intake level of rams in group Ⅲ was significantly higher than that in group Ⅳ (P<0.05). 2) Group Ⅲ of goats had the greatest dry matter intake ( DMI); dietary energy level had no significant influence on average daily gain ( ADG) and feed to gain ratio ( F/G) ( P>0.05) . 3) Gain benefit in group Ⅲ was the greatest among four groups, nevertheless, the gross returns in group Ⅰ was the greatest among four groups, followed by group Ⅲ. 4) Apparent digestibility of CP of ewes in groupⅣwas significantly higher than that in group Ⅰ ( P<0.05) , and no significant difference was observed for apparent digestibility of dry matter among four groups ( P>0.05); apparent digestibility of CP of rams in group Ⅲ was significantly higher than that in group Ⅰ( P<0.05) , and that of DM of rams in groupⅢandⅣwas significantly higher than that in group Ⅰ( P<0.05) . 5) The gross energy ( GE) and DE intakes in group Ⅲ was the greatest among four groups, and fecal energy in group Ⅳ was the lowest;energy digestibility of rams in groups Ⅲ,Ⅳ was significantly higher than that in groups Ⅰ and Ⅱ ( P<0.05) , however, no significant difference was observed for the energy di-gestibility of ewes among four groups ( P>0.05) . 6) Blood contents of nonesterified fatty acid ( NEFA) andβ-hydroxybutyrate acid of goats in group Ⅳ were the lowest among four groups;blood contents of glucose and total protein in group Ⅲ were the greatest, while the urinary nitrogen content was the lowest. In summary, the optimal energy level of Shanbei white cashmere goats aged 5 to 6 months is above 11. 63 MJ/kg.关键词
陕北白绒山羊/能量水平/生长性能/营养物质消化代谢/血液指标Key words
Shanbei white cashmere goats/energy level/growth performance/nutrient digestion and metabo-lism/blood parameters分类
农业科技引用本文复制引用
黄帅,朱海鲸,史雷,毕台飞,高晔,鲁院院,陈少东,屈雷..能量水平对生长期陕北白绒山羊生长性能及营养物质消化代谢的影响[J].动物营养学报,2015,27(12):3931-3939,9.基金项目
陕西省科技统筹创新工程计划项目(2014KTDZ02-01,2015KTTSNY04-05) （2014KTDZ02-01,2015KTTSNY04-05）
榆林市产学研合作项目(2012cxy1-11) （2012cxy1-11）
2015年陕西省农业厅"农业科技创新转化资金项目" （）
