| 摘要: |
| 为研究日粮中有机(羟基蛋氨酸螯合)铜、锰和锌等量替代其硫酸盐对产蛋高峰期蛋鸡的影响,试验选用108只37周龄海兰褐商品蛋鸡,分为2个处理。对照组在基础日粮的基础上添加10、30和30 mg/kg硫酸盐形式的Cu、Mn和Zn,处理组采用蛋氨酸羟基类似物螯合Cu、Mn和Zn等量替代其硫酸盐形式。试验各处理的蛋氨酸当量相同,试验前蛋鸡饲喂2周基础日粮,以降低其微量元素体储备。结果表明,微量元素来源对蛋壳强度及厚度未产生影响(P＞0.05)。有机微量元素的添加显著提高43周龄肝脏CA(P=0.052 1)、CP活性(P＜0.000 1),但48周龄差异不显著(P＞0.05);提高43、48周龄肝脏、胰脏、脾脏,48、53周龄蛋黄中铜沉积(P＜0.05);提高43周龄肝脏、蛋黄中锌含量,但降低脾脏、胫骨中锌沉积(P＜0.05);显著提高48周龄脾脏锰沉积(P＜0.01)。结果显示,羟基蛋氨酸螯合铜锰锌等量替代其硫酸盐形式能够更快的提高肝脏碳酸酐酶、铜蓝蛋白活性;提高肝脏、胰脏、脾脏、蛋黄中铜沉积;提高脾脏锰沉积;提高肝脏、蛋黄中锌含量,但降低脾脏、胫骨中锌沉积。 |
| 关键词: 鸡 微量元素 羟基蛋氨酸 螯合物 蛋壳品质 酶活 |
| DOI：10.11841/j.issn.1007-4333.2011.04.020 |
| 投稿时间：2011-01-08 |
| 基金项目:农业公益性行业科研专项(nyhyzh07-039) |
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| Effects of 2-hydroxy-4-(methylthio)-butanoic acid chelatedCu/Mn/Zn on eggshell quality,enzyme activity andtrace mineral retention in laying hens |
|
SUN Qiu-juan, GUO Yu-ming, ZHANG Tian-guo, WEN Jin-lei
|
| (State Key Lab of Animal Nutrition,College of Animal Science & Technology,China Agricultural University,Beijing 100193,China) |
| Abstract: |
| In order to compare the effects of mineral 2-hydroxy-4-(methylthio)-butanoic acid (HMBA) chelates (Cu,Mn,Zn) versus sulfates on laying hens,one hundred and eight 37-wk-old laying hens (Hyline Brown) were assigned to two treatments,where basal diet in the control group (CON) supplemented with a combination of inorganic minerals (sulfate source,i.e.,Cu 10 mg/kg,Zn 30 mg/kg and Mn 30 mg/kg of diet) and the treatment diets (OTM) supplemented with a combination of organic minerals to replace their inorganic forms in CON group,i.e.,10 mg/kg organic Cu (Novus Intl.,USA),20 mg/kg organic Zn,and 20 mg/kg organic Mn.All diets were iso-methionine.Basal diet was fed for 2 week of a pre-experiment period.Results showed that supplementation with HMBA chelated minerals did not affect eggshell quality (P>0.05).Supplementation of organic minerals significantly increased CA (P=0.052 1) and CP(P<0.000 1) activities in liver at 43 week of age.However,differences disappeared at 48 week of age (P>0.05).Supplementation of organic minerals significantly increased Cu concentration in liver,pancreas,spleen at 43 and 48 week of age,and yolk at 48 and 53 week of age (P<0.05).Zn concentration were increased in liver and yolk,but decreased in spleen and tibia when fed with organic minerals (P<0.05).Mn concentration in spleen (P<0.01) was also observed to be increased at 48 week of age.In conclusion,supplementation of mineral HMBA chelates could increase enzyme activities in liver,increase Mn and Cu retention,increased Zn retention in liver and yolk and decreased Zn in spleen and tibia. |
| Key words: hen 2-hydroxy-4-(methylthio)-butanoic acid chelated Cu/Mn/Zn eggshell quality enzyme activity mineral retention |
