不同营养水平日粮对荷斯坦奶公牛育肥效果的影响

doi:10.16431/j.cnki.1671-7236.2015.07.013

Abstract

Abstract: This experiment was conducted to study the effect of different dietary nutrition levels on fattening effect of Holstein bulls.48 4-month-old Holstein bulls with an average body weight of 128 kg were allocated into two groups,group Ⅰ was fed a low nutrition level diet,group Ⅱ was fed a high nutrition level diet.Each group had 24 Holstein bulls.The pre-test period lasted for 7 days and the trial period lasted for 245 days.The results showed that compared with group Ⅰ,the ADG in group Ⅱ was significantly increased by 6.36% (P<0.01),while the F/G in group Ⅱ was decreased by 6.55%.With the increasing of dietary nutrition levels,the apparent digestibility of CP,EE,NDF,ADF,Ca and P were rising,but there was no significant differences between two groups (P>0.05).Compared with group Ⅰ,the serum GLU,AST,ALT and GH contents in group Ⅱ were increased by 12.52%,12.85%,9.68% and 13.24% (P<0.05),respectively,while the serum BUN content in group Ⅱ was decreased by 10.98% (P<0.05).Compared with group Ⅰ,the feeding profits of group Ⅱ increased by 1.37 yuan/(head·day),the total economic benefit of group Ⅱ increased by 335.65 yuan/head.In conclusion,the improvement of dietary nutrition levels could improve the fattening performance and the economic benefit of Holstein bulls.

Key words: nutrition levels; Holstein bulls; fattening; nutrient apparent digestibility; blood biochemical indices

CLC Number:

S823

LI Xiao-meng, LI Qiu-feng, CAO Yu-feng, YU Chun-qi, LI Jian-guo, GAO Yan-xia. Effect of Different Dietary Nutrition Levels on Fattening Effect of Holstein Bulls[J]. China Animal Husbandry & Veterinary Medicine, 2015, 42(7): 1705-1710.

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Effect of Different Dietary Nutrition Levels on Fattening Effect of Holstein Bulls

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