Effect of Seasonal Estrus Synchronization on Reproductive Performance of Fuqing Goats
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摘要:
目的 为提高舍饲福清山羊的繁殖效率,研究季节性同期发情处理对舍饲福清山羊繁殖性能的影响。 方法 采用PRID+PMSG+PGF2α法分别在春、秋季节对舍饲福清山羊进行同期发情处理,观察处理山羊的发情情况,并比较分析同期发情处理与自然发情处理山羊的繁殖效率。 结果 舍饲福清山羊季节性同期发情处理的平均发情率为96.88%,平均受胎率为93.75%。在试验周期内,自然发情配种(对照组)的产羔总胎次低于季节性同期发情处理组(试验组);对照组的胎产羔数和羔羊初生重均高于试验组(P > 0.05),但断奶活羔羊数却低于试验组(P > 0.05);试验组母羊产羔间隔极显著低于对照组(P < 0.01),其年产胎次高达1.87胎,年供活羔数3.12只,比对照组提高了36.8%。 结论 研究初步证实利用季节性发情调控进行舍饲福清山羊的繁育生产,能提高羊群繁殖效率,具有一定的生产利用价值。 Abstract:Objective Effect of seasonal synchronized estrus treatment on the reproductive performance of Fuqing goats was studied. Method PRID+PMSG+PGF2α was used on the goats to artificially induce estrous cycles in spring and autumn in a dry lot to determine the treatment effects. Result An average rate of estrus occurrence at 96.88% with an average conception rate of 93.75% was achieved in the goats by the treatment. During the trial, the lambs born by natural estrus mating (control) was fewer than those by the treatment. On the other hand, the number per delivery and body weight at birth of the lambs in control group were higher than those in the treatment group (P>0.05), but the treated goats had more lambs survived after weaned (P>0.05). The interval between births of the treated goats was significantly shorter than that of control (P < 0.01). As a result, there were 1.87 births annually with 3.12 survived baby lambs among the treatment goats representing 36.8% increase over control. Conclusion The preliminary results suggested that the artificial regulation on the estrus of Fuqing goats could increase the reproduction and survival rate of the new born lambs. -
Key words:
- dry lot feeding /
- Fuqing goat /
- seasonal estrus synchronization
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表 1 试验日粮组成及营养水平(干物质基础)
Table 1. Composition and nutrition levels of experimental diets (on dry matter basis)
项目
Item空怀、妊娠前期
母羊日粮
Diet for barren
and the early-
pregnancy
stage ewes妊娠后期、哺乳期
母羊日粮
Diet for late-
pregnancy and
lactation stage
ewes原料 Ingredients/% 玉米青贮 Maize silage 35 30 杂交狼尾草 Hybrid pennisetum 35 30 玉米 Maize 10 10 大豆粕 Soybean meal 10 18 麸皮 Wheat bran 8 10 磷酸氢钙 CaHCO3 0.7 0.7 食盐 Salt 0.5 0.5 石粉 Stone powder 0.3 0.3 预混料 Premix 0.5 0.5 合计 Total 100 100 营养水平 Nutritional level 消化能 Digestible energy/(MJ·kg-1) 5.43 6.58 粗蛋白 Crude protein/% 13.1 15.7 钙 Ca/% 0.45 0.47 磷 P/% 0.39 0.41 中性洗涤纤维 Neutral detergent fiber/% 48.39 41.48 酸性洗涤纤维 Acid detergent fiber/% 30.06 25.85 注:(1)每千克预混料中含有:VA 200 000 IU,VD 50 000 IU,VE 500 IU,Fe 2 g,Cu 0.75 g,Zn 3 g,Mn 4 g,I 50 mg,Se 20 mg,Co 50 mg。(2)除消化能为计算值外,其他均为实测值。
Note:(1)Containing VA 200 000 IU,VD 50 000 IU,VE 500 IU,Fe 2 g,Cu 0.75 g,Zn 3 g,Mn 4 g,I 50 mg,Se 20 mg,Co 50 mg per kg of premix. (2)Digestible energy was a calculated value, while the rest nutrient indices were measured values.表 2 季节性同期发情处理母羊的同期发情效果
Table 2. Efficiency of seasonal estrus synchronization treatment on female goats
同期发情处理时间
Time for synchronized estrus
treatment/(yy-mm-dd)同期发情处理母羊数
Number of synchronized
estrus ewes发情母羊数
Number of estrous
ewes同期发情率
Synchronization estrus
rate/%受胎母羊数
Number of conception
ewes受胎率
Conception
rate/%2016-09-25 32 31 96.88 30 93.75 2017-04-15 32 32 100 31 96.88 2017-10-15 32 30 93.75 29 90.63 平均 Average 32 31 96.88 30 93.75 表 3 不同处理母羊群体的繁殖效率
Table 3. Reproductive efficiencies of Fuqing goats by different treatments
组别
Group产羔总胎次
Born
lambs胎产羔数
Litter
size羔羊初生重
Lamb weight
/kg断奶活羔数
Number of lambs survived
after weaned母羊产羔间隔
Lambing interval
of ewes/d年产胎次
Yearly
parity年供活羔数
Number of live
lambs per year对照组 Control group 68 2.06±0.45 1.76±0.68 1.60±0.55 258.9±38.9 1.41 2.28 试验组 Treatment group 90 1.88±0.59 1.62±0.51 1.77±0.57 195.2±29.7 1.87 3.12 t值 t value - 1.857 2.433 -1.869 8.954 - - Sig. - 0.065 0.016 0.064 0.000 - - -
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