摘要
在单只羊饲喂160g·d-1和粉碎玉米秸秆(自由采食,含尿素8g·kg-1秸秆)的条件下,给绵羊添喂不同量的纯玉米淀粉,以研究对绵羊采食与消化代谢的影响。结果表明,给25kg体重的绵羊分别按每公斤体重添喂0,2,4,6,8g·d-1玉米淀粉(5组,每组n=4),各组中单只羊玉米秸秆的采食量(g·d-1)分别为526.6±19.5,524.7±10.0(P>0.05),562.7±20.8(P>0.05),515.0±23.4(P>0.05)和432.5±23.9(P<0.01),有机物采食量(g·d-1)分别为596.1±29.5,648.8±24.7(P>0.05),680.5±28.5(P<0.01),690.1±32.9(P<0.01)和687.2±18.6(P<0.01),有机物消化率(%)分别为65.7±1.9,69.3±2.2(P>0.05),67.1±3.4(P>0.05),67.9±2.5(P>0.05)和69.3±2.1(P>0.05),表观粗蛋白消化率(%)分别为76.4±1.7,75.9±0.6(P>0.05),74.2±1.0(P>0.05),71.7±1.7(P<0.01)和72.0±2.1(P<0.01),纤维素消化率(%)分别为58.1±2.4,65.0±1.5(P<0.05),62.0±1.4(P>0.05),47.3±3.9(P<0.01)和38.3±2.5(P<0.01)。各组中单只羊获得的可消化能(J·d-1)分别为7872±175,8513±77,9737±253,9570±290,8429±147,氮保留率(%)分别为11.6±0.7,16.0±0.5(P<0.01),24.5±0.5(P<0.01),19.4±0.7(P<0.01)和17.6±0.6(P<0.01),体增重(g·d-1)分别为44.0±10.3,61.3±16.
In the condition of feeding 160 g concentrate and voluntarily intaking urea added corn straw, the sheep were fed with pure corn starch to study the effect of starch on intake, digestion and metabolism. The results showed that when the animals were fed with 0, 2, 4, 6 and 8g starch/kg body weight (5 groups, each group n=4), the intake of corn straw were 526.6±19.5,524.7±10.0(P>0.05),562.7±20.8(P(>0.05),)515.0±23.4(P>0.05)and 432.5±23.9(P<0.01)(g/sheep/day)respectively,the OM intake were 596.1±29.5,648.8±24.7(P>0.05),680.5±28.5(P<0.01),690.1±32.9(P<0.01)and 687.2±18.6(P<0.01) respectively,the OM digestibility (%) were 65.7±1.9,69.3±2.2(P>0.05),67.1±(3.4)(P>0.05),67.9±2.5(P>0.05) and 69.3±2.1(P>0.05) respectively, the apparent CP digestibility were 76.4±1.7,75.9±0.6(P>0.05),74.2±1.0(P>0.05),71.7±1.7(P<0.01)and 72.0±2.1(P<0.01)respectively,the digestibility of cellulose were 58.1±2.4,65.0±1.5(P<0.05),62.0±1.4(P(>05),)47.3±3.9(P<0.01)and 38.3±2.5(P<0.01)respectively. The digestible energy(DE) were 7872.2±175.1,8513.0±76.5,9737.3±252.5,9570.1±290.1 and 8429.0±146.7J/sheep/day respectively. Nitrogen retention (NR) (%) were 11.6±0.7,16.0±0.5(P<0.01),24.5±0.5(P<0.01),19.4±(0.7)(P<0.01)and 17.6±0.6(P<0.01) respectively,and the daily body weight gain (DBWG) were 44.0±10.3,(61.3)±16.3(P<0.05),104.0±7.3(P<0.01),108.7±13.0(P<0.01)and 48.9±21.2(P(>05))(g/sheep/day) respectively. It is concluded that there should be some starch in diet when sheep are mainly fed with corn straw, and the 11.4% of starch content in diet is suitable, which increases corn straw intake, NR,DE and DBWG by 6.8%, 111%, 23.7% and 136% respectively.
出处
《新疆农业大学学报》
CAS
2004年第3期1-5,共5页
Journal of Xinjiang Agricultural University
基金
新疆维吾尔自治区动物营养与饲料科学重点学科经费资助
关键词
绵羊
秸秆
淀粉
消化
代谢
sheep
straw
starch
digestion
metabolism
