| 摘要: |
| 【目的】研究卵巢摘除对山羊羔产肉性能的影响。【方法】将40只全舍饲条件下体质量相近的母羔羊随机分为处理组和对照组，每组20只，在试验开始时处理组母羔羊摘除卵巢，对照组未摘除。在试验0 d和50 d早晨对2组羔羊空腹称体质量，并在试验0，10，20，30，40和50 d早晨对2组羔羊空腹采血，测定血清生长激素(GH)水平和血清生长抑素(SS)水平。饲养50 d后，分别从处理组和对照组随机选取5只母羔羊屠宰，测定其胴体质量、屠宰率、净肉率、水分、粗脂肪和粗蛋白含量等指标。【结果】处理组羔羊平均日增体质量为128 g，比对照组高13 g，且差异显著(P<0.05)。处理组羔羊血清GH质量浓度从20 d开始一直呈上升趋势，且显著高于对照组(P<0.05)，到50 d时达到11.55 μg/L，较对照组高2.21 μg/L；处理组羔羊血清SS在10 d降至28.99 ng/L，显著低于对照组(P<0.05)，此后一直处于较低水平，而对照组血清SS则一直保持稳定。处理组羔羊屠宰率为45.62%，对照组则为42.41%，二者差异显著(P<0.05)；处理组羔羊的胴体质量和净肉质量分别为(12.85±0.64)和(10.36±0.58) kg，比对照组高出1.62和1.37 kg，且差异显著(P<0.05)。处理组羔羊肌肉中粗脂肪质量分数为6.71%，对照组为3.37%，差异极显著(P<0.01)；其粗蛋白质量分数也高于对照组，但差异不显著(P>0.05)；其粗灰分和水分质量分数低于对照组，差异也不显著(P>0.05)。【结论】去卵巢可以有效提高母羔羊的产肉性能。 |
| 关键词: 卵巢摘除 母山羊羔 产肉性能 |
| DOI： |
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| 基金项目:国家现代肉羊产业技术体系“国家肉羊产业技术体系宝鸡综合试验站建设”项目（nycytx-39） |
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| Effects of ovariectomy on production performance of doe kids |
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| Abstract: |
| 【Objective】The study was intended to ascertain the effects of ovariectomy on production performance of doe kids.【Method】40 doe kids with similar body weights under stall-feeding were randomly divided into treatment and control group.The doe kids of the treatment group were ovariectomized at the beginning of the test,while the control group was not.The doe kids of 2 groups were weighed in the morning at days 0 and 50,and their venous blood were collected in the morning at days 0,10,20,30,40 and 50 since the test started.The serum was separated from blood samples to determine the levels of growth hormone (GH) and serum somatostatin (SS).Every 5 doe kids from the two groups were selected randomly to slaughter after 50 days.The carcass weight,dressing percentage,lean meat percentage,crude fat,crude protein and other indicators were determined.【Result】The average daily gain of doe kids in treatment group was 128 g,which was 13 g higher than that of control group,and there were significant differences between the two groups (P<0.05).The serum GH levels of the treatment group increased from the 20 days,and the levels were significant higher than the control group(P<0.05),and the averaged level was 11.55 μg/L at 50 day,which was 2.21 μg/L higher than the control group.The serum SS level of the treatment group was 28.99 ng/L at 10 day,and it was significant lower than the control group (P<0.05).The SS levels decreased since day 10 while the control group maintained a stable level.The dressing percentages of treatment group and control group were 45.62% and 42.41%,respectively,and the difference between two groups was significant (P<0.05).The carcass weight of the treatment group was (12.85±0.64) kg and was 1.62 kg higher than the control group (P<0.05).The net meat weight of the treatment group was (10.36±0.58) kg and was 1.37 kg higher than the control group (P<0.05).The mass fraction of crude fat of the treatment group was 6.71% and that of the control group was 3.37%,and the difference between two groups was significant (P<0.01).The mass fraction of crude protein of the treatment group were higher than the control group,but the difference was not significant (P>0.05).The mass fraction of crude ash and moisture were lower than the control group,and there were no significant difference (P>0.05).【Conclusion】The production performance of the doe kids could be improved by ovariectomy. |
| Key words: ovariectomy doe kids production performance |
