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首页> 外文期刊>Tropical Animal Health and Production >Demographic dynamics and off-take of cattle herds in southern Mali
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Demographic dynamics and off-take of cattle herds in southern Mali

机译：马里南部的人口动态和牛群的获取

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摘要

The herds of 95 families were monitored for 1 year in eight villages in the cotton-growing region of southern Mali. In 2006–2007, reproduction performances were average, with 0.54 calvings/year per cow, and mortality was low. Herd numerical productivity is not very high, less than 0.13/year, because of the high proportion of males kept for animal draught. Depending on the herd size, the behaviour of the families differs, in terms of off-take and in-take of animals. Families that only have one or two draught animals seek to increase their animal draught capacity, with a negative net off-take (?0.13/year). Families with two to three cows have a very low net off-take (0.02/year), with culling of adult animals compensated by purchase. They therefore capitalised this year, with an annual herd growth of 8%. Families with a very large herd (20 to 50 cows) take off more of their stock, with a net off-take of 0.08/year (very few animal purchases) and make a stock growth of 5%. And finally, families with an average-sized herd (6 to 19 cows) take off the whole of the year’s production, with a net off-take of 0.11/year and a nil stock growth rate. The use of a demographic model made it possible to measure the sensitivity of the productivity rate to the different demographic parameters.
机译：在马里南部棉花种植区的八个村庄对95个家庭的牛群进行了为期一年的监测。在2006-2007年间，繁殖性能平均，每头母牛每年产犊0.54头，死亡率低。畜群的数字生产率不是很高，低于0.13 /年，因为饲养动物的雄性比例很高。根据牲畜的大小，在摄取和摄取动物方面，家庭的行为有所不同。仅拥有一两个牲畜的家庭寻求增加其牲畜的饲养能力，而净承购量为负（0.13欧元/年）。拥有两到三头母牛的家庭的净购买量很低（每年0.02），淘汰成年动物可以通过购买获得补偿。因此，他们今年资本化，畜群每年增长8％。牛群很大（20至50头奶牛）的家庭可以腾出更多的牲畜，每年的净捕捞量为0.08（购买的动物很少），牲畜存栏增长5％。最后，拥有中等规模牛群（6至19头母牛）的家庭在全年的整个生产中都处于停产状态，其净承购量为每年0.11，存货增长率为零。人口模型的使用使得有可能测量生产率对不同人口参数的敏感性。

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