Chawala A R, Banos G, Peters A, Chagunda M G G
SRUC Research, Kings Buildings, West Mains Road, Edinburgh, EH9 3JG, UK.
Centre for Tropical Livestock Genetics and Health, University of Edinburgh, Easter Bush, Midlothian, EH25 9RG, UK.
Trop Anim Health Prod. 2019 Jul;51(6):1337-1344. doi: 10.1007/s11250-018-01796-9. Epub 2019 Feb 4.
Decisions of breeding schemes in many countries in sub-Saharan Africa tend to be either government or project driven, with a focus on upgrading local breeds. However, there is scant information on the individual animal traits that smallholder farmers prefer. The aim of this study was to examine farmers' preferences of dairy cattle traits using a discrete choice experiment methodology. The study was conducted through visits to 555 randomly selected dairy farms in the sub-humid Eastern coast and temperate Southern highlands of Tanzania. Choices of animal traits were presented to farmers who were asked to evaluate choice alternatives based on attribute levels and finally select the alternative with the highest utility. The choice experiment data were analysed using a conditional logit model. Coefficients for milk yield, fertility, feed requirement, temperament and diseases resistance were overall statistically significant (p < 0.05). In order of perceived importance, farmers were willing to keep a cow with high milk yield (coefficient = 1.43 ± 0.059), good fertility (0.85 ± 0.050), easy temperament (0.76 ± 0.066), low feed requirement (- 0.56 ± 0.092) and enhanced tropical disease resistance (0.48 ± 0.048). The purchase price coefficient was negative (- 0.001 ± 0.0003), indicating that farmers would prefer improved dairy cattle at affordable prices. Farmers' preferred traits were influenced by agro-ecological zone and type of production system (extensive vs intensive). The study provides an opportunity for breeding programme designers to take farmers' preferred dairy traits into serious consideration.
撒哈拉以南非洲许多国家的育种计划决策往往由政府或项目驱动,重点是改良当地品种。然而,关于小农养殖户偏好的个体动物性状的信息却很少。本研究的目的是使用离散选择实验方法来考察养殖户对奶牛性状的偏好。该研究通过走访坦桑尼亚东部沿海半湿润地区和南部高地温带地区随机选取的555个奶牛场来进行。向养殖户展示动物性状的选择,并要求他们根据属性水平评估选择方案,最后选择效用最高的方案。使用条件logit模型对选择实验数据进行分析。产奶量、繁殖力、饲料需求、性情和抗病性的系数总体上具有统计学意义(p < 0.05)。按重要性排序,养殖户愿意饲养产奶量高的奶牛(系数 = 1.43 ± 0.059)、繁殖力好的奶牛(0.85 ± 0.050)、性情温顺的奶牛(0.76 ± 0.066)、饲料需求低的奶牛(-0.56 ± 0.092)以及热带抗病能力强的奶牛(0.48 ± 0.048)。购买价格系数为负(-0.001 ± 0.0003),表明养殖户更喜欢价格实惠的改良奶牛。养殖户偏好的性状受农业生态区和生产系统类型(粗放型与集约型)的影响。该研究为育种计划设计者提供了一个机会,使其能够认真考虑养殖户偏好的奶牛性状。