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首页> 外文期刊>Tropical Animal Health and Production >Performance of Djallonké Sheep under an Extensive System of Production in Faranah, Guinea
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Performance of Djallonké Sheep under an Extensive System of Production in Faranah, Guinea

机译：几内亚法拉纳在广泛生产系统下Djallonké绵羊的生长性能

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A total of 147 ewes, 4 rams and 188 lambs of their progeny of the Djallonké breed of sheep were used to study the factors affecting reproductive and growth traits and the causes of lamb mortality. Data on ewes were collected during a 12-month period, while those on the lambs born to 123 of the ewes were collected until they were 12 months of age. The average fertility and abortion rates were 0.84 and 0.09. The fertility rate increased and the abortion rate decreased with increasing age of the ewes (p<0.05). The number of lambs born per ewe joined, litter weight at birth per ewe joined and litter weight at weaning per ewe joined were 1.28, 3.5 kg and 17 kg, respectively. The average numbers of lambs born per ewe, lambs born alive per ewe, lambs born dead per ewe and lambs per ewe that died between birth and weaning were 1.53, 1.43, 0.03 and 0.3, respectively. The age of the ewes significantly (p<0.05) affected all these traits except the number of dead lambs and the index of fertility (94%). The age of the ewes significantly (p<0.05) affected the birth weight and the weight at 6 and 12 months of age, whereas the lambing season significantly (p<0.05) affected all the growth traits studied. The type of birth was the most important source of variation in body weights of lambs. Sex had no significant (p>0.05) effect on the growth traits studied. The complex `starvation–bad management–light body weight at birth' caused 48% of the lamb mortality between birth and weaning, while diarrhoea, pneumonia and internal and external parasites caused approximately 52% of the lamb mortality over the same period. The seasonal raw mortality rate of the lambs before weaning was highest in the humid season.
机译：共有147头母羊，4头公羊和188头羔羊Djallonké品种的后代用于研究影响生殖和生长性状的因素以及羔羊死亡率的原因。在12个月内收集母羊的数据，而直到12个月大时才收集123头母羊出生的羔羊的数据。平均生育率和流产率分别为0.84和0.09。随着母羊年龄的增长，生育率增加而流产率下降（p <0.05）。每只母羊的出生羔羊数，每只母羊的出生时产仔重和每只母羊断奶时的产仔重分别为1.28、3.5 kg和17 kg。在出生和断奶之间死亡的平均每只母羊羔数，存活的每只母羊羔数，死亡的每只母羊羔数和死亡的平均每只母羊数分别为1.53、1.43、0.03和0.3。母羊的年龄显着（p <0.05）影响了所有这些特征，除了死羔羊的数量和育性指数（94％）。母羊的年龄显着（p <0.05）影响出生体重以及6和12个月大的体重，而羊羔季节显着（p <0.05）影响所有研究的生长性状。出生类型是羔羊体重变化的最重要来源。性别对所研究的生长性状没有显着影响（p> 0.05）。复杂的“饥饿-管理不善-出生时体重轻”导致同期出生和断奶之间的羔羊死亡率为48％，而腹泻，肺炎以及内部和外部寄生虫则导致同期羔羊死亡率的52％。断奶前羔羊的季节性生死率在潮湿季节最高。

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