不同饲粮赖氨酸水平对二元母猪生长性能和血清指标的影响 |
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引用本文: | 方桂友,刘景,缪伏荣,叶鼎承,董志岩. 不同饲粮赖氨酸水平对二元母猪生长性能和血清指标的影响[J]. 福建农业学报, 2017, 0(10): 1057-1061. DOI: 10.19303/j.issn.1008-0384.2017.10.002 |
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作者姓名: | 方桂友 刘景 缪伏荣 叶鼎承 董志岩 |
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基金项目: | 福建省科技计划项目——省属公益类科研院所基本科研专项 |
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摘 要: | 研究不同饲粮赖氨酸水平对70~100kg阶段二元母猪生长性能、血清指标的影响。选用96头体况相似、平均体重为(69.01±4.43)kg的长大二元母猪,随机分成4个组,每组4个重复,根据饲料原料可消化赖氨酸(DLys)和理想蛋白质氨基酸平衡模式(IAAP)配制低蛋白质试验饲粮(等能、等氨基酸平衡模式),设置饲粮DLys水平分别为0.61%(Ⅰ组)、0.66%(Ⅱ组)、0.71%(Ⅲ组)、0.76%(Ⅳ组)。结果表明,Ⅱ组平均日增重(ADG)最高(908.33g),料重比(F/G)最低(2.77);Ⅱ组血清尿素氮(UN)浓度〗显著低于Ⅰ组和Ⅳ组(P0.05),与Ⅲ组差异不显著(P0.05),血清胰岛素(INS)、胰岛素样生长因子-I(IGF-I)浓度随饲粮DLys水平的升高呈现先升高后降低的变化趋势(P0.05);血清赖氨酸(Lys)和苏氨酸(Thr)质量浓度Ⅳ组显著高于Ⅰ组(P0.05),其他血清氨基酸质量浓度呈现随饲粮DLys水平的升高先降低后升高的变化趋势(P0.05),以Ⅱ组较低。综合生长性能和血清指标,在本试验条件下,二元母猪70~100kg阶段饲粮DLys适宜日摄入量为16.57g·d~(-1),即饲粮DLys水平为0.66%,能获得较好的生长性能。
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Effects of Lysine Content in Low Protein Fodder on Growth and Serum Biochemistry of Two-line Crossbred Gilts |
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Abstract: | Effect of lysine content in a low-crude-protein fodder on the growth performance and serum biochemical indices of 70-to-100-kg-class gilts was studied.Ninety-six gilts crossbred between Landrace and Large White with an average body weight of (69.01 ±4.43) kg and similar physical conditions were randomly divided into 4 groups with 4 replicates each for the study.With an equal energy and balanced amino acid design,the digestible lysine (DLys)at 0.61% (Group Ⅰ),0.66% (Group Ⅱ),0.71% (Group Ⅲ) or 0.76% (Group Ⅳ) in the low protein diets were applied for the feeding.The results showed the gilts in Group Ⅱ had the highest average daily gain at 908.33 g · d-1 and the lowest feed/gain ratio at 2.77 (P<0.05) among all.The Group Ⅱ gilts also showed a significantly lower serum urea nitrogen than the gilts in Group Ⅰ or Group Ⅳ (P<0.05),but no significant difference in comparison with Group Ⅲ (P>0.05).The serum insulin and insulin growth factor-Ⅰ in all test animals increased initially,and then,decreased as DLys increased (P> 0.05).The serum lysine and threonine of the Group Ⅰ gilts were significantly lower than those of Group Ⅳ (P<0.05),while the other amino acids decreased initially and followed by an increase with increasing DLys (P>0.05),which was lower in Group Ⅱ.Taking all factors into account,a daily DLys intake of 16.57 g · d-1 (or,as in Group Ⅱ,0.66% DLys in the low-protein diet) would be optimal for the growth of gilts in the weight class. |
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