Assessment of farmer willingness to pay for quality planting materials of b...

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英文文献：Assessment of farmer willingness to pay for quality planting materials of biofortified and non-biofortified varieties of sweetpotato-评估农民购买生物强化和非生物强化甘薯品种的优质种植材料的意愿
英文文献作者：Mwiti, Florine K.,Okello, Julius J.,Munei, Kimpei,Low, Jan
英文文献摘要：
The current fight against Vitamin A deficiency has focused on promoting biofortified staples that are rich in beta carotene, such as Orange Fleshed Sweetpotato (OFSP). These efforts usually entail providing quality planting materials to vulnerable households accompanied by sensitization about the benefits of OFSP. Most such interventions heavily subsidize the planting materials, with subsidies ranging from 50-100%. The subsidies are often premised on the hope that farmers will eventually absorb the full cost of the planting materials once they experience the benefits of consuming OFSP. This study uses data from 481 farmers drawn from different regions that benefited from a sweetpotato project, and the ANOVA and descriptive statistics, to examine farmers’ willingness to pay (WTP) for OFSP planting materials. It specifically compares the WTP for quality planting materials of OFSP and non-OFSP varieties and assesses differences in WTP by region and agroecology. It finds a higher WTP for clean planting materials of a non-OFSP variety than for all OFSP varieties studied. It also finds that WTP differs by region and agroecology. The study concludes that there is higher demand for quality planting materials of some of the non-OFSP varieties of sweetpotato than for OFSP varieties, and that WTP for differs by intervention area. These findings imply that farmers’ demand for clean planting materials of non-OFSP varieties is higher than for the OFSP varieties. They suggest the need for sweetpotato breeding to continue considering some of the attributes that make local varieties popular, e.g., taste and dry matter content, in their breeding programs.

目前对抗维生素A缺乏的斗争集中在推广富含-胡萝卜素的生物强化主食上，比如橙色肉质甘薯(OFSP)。这些努力通常需要向弱势家庭提供优质种植材料，同时宣传OFSP的好处。大多数这类干预措施对种植材料给予了很大的补贴，补贴在50-100%之间。补贴的前提通常是希望农民在体验到使用sp的好处后，最终能够消化种植材料的全部成本。本研究使用从甘薯项目中受益的不同地区481名农民的数据，并采用方差分析和描述性统计，以检验农民为OFSP种植材料支付费用的意愿。具体比较了常青藤品种和非常青藤品种优质种植材料的净收益，评价了不同地区和不同农业生态条件下的净收益差异。结果表明，非疏水疏水品种清洁种植材料的净落差值高于所有疏水疏水品种。研究还发现，不同地区和不同农业生态环境下，农业净收益也存在差异。研究结果表明，部分非速效甘薯品种对优质种植材料的需求高于速效甘薯品种，且干预面积不同，甘薯的种植需水量也不同。这一结果表明，农户对无公害品种清洁种植材料的需求高于无公害品种。他们建议在甘薯育种中继续考虑使当地品种受欢迎的一些特性，例如口味和干物质含量。

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