文章基本信息

标题：Farmer management of production risk on degraded lands: the role of wheat genetic diversity in Tigray Region, Ethiopia
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作者：Di Falco, Salvatore ; Chavas, Jean-Paul ; Smale, Melinda 等
期刊名称：Journal of Food Distribution Research
印刷版ISSN：0047-245X
出版年度：2006
卷号：37
期号：SUPPL
出版社：Food Distribution Research Society
摘要：This paper investigates the effects of wheat genetic diversity and land degradation on risk and agricultural productivity in less favored production environments of a developing agricultural economy. Drawing production data from household survey conducted in the highlands of Ethiopia, we estimate a stochastic production function to evaluate the effects of variety richness, land degradation, and their interaction on the mean and the variance of wheat yield. Ethiopia is a centre of diversity for durum wheat and farmers manage complex variety mixtures on multiple plots. Econometric evidence shows that variety richness increases farm productivity. Variety richness also reduces yield variability but only for high levels of genetic diversity. Simulations with estimated parameters illustrate how planting more diverse durum wheat varieties on multiple plots contributes to improving farmer’s welfare.
关键词：land degradation;wheat production;productivity;risk;genetic diversity;household surveys;biodiversity;stochastic analysis