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是什么推动了对耐旱高粱品种的需求?来自埃塞俄比亚水分胁迫地区的证据。

What drives the demand for drought-resilient sorghum varieties? Evidence from moisture-stressed areas in Ethiopia.

作者信息

Sime Mekonnen, Mersha Dereje, Yami Mesay

机构信息

Ethiopian Institute of Agricultural Research (EIAR), Addis Ababa, Ethiopia.

International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria.

出版信息

PLoS One. 2025 Sep 5;20(9):e0315985. doi: 10.1371/journal.pone.0315985. eCollection 2025.

Abstract

Sorghum is one of the critical food security crops, particularly in moisture-stressed areas of Ethiopia. However, in the absence of a well-organized formal seed system, public research institutions have continued to promote and disseminate improved sorghum varieties to encourage adoption. On the other hand, the lack of evidence on smallholder farmers' demand for improved varieties has discouraged the seed industry from investing in marginalized crops, like sorghum, in contrast to more commercialized crops such as wheat and maize. This study assessed producers' willingness to pay (WTP) for improved sorghum varieties suitable for moisture-stressed sorghum growing agro-ecologies. Data were collected from 659 households selected using probability proportional to size (PPS) sampling techniques. Descriptive statistics, heterogeneity analysis and generalized ordered probit econometric model were employed for data analysis. Farmers' WTP was, on average, 59% higher than the market price set by the government. In the Amhara and Oromia regions, WTP was 67% and 47% above the official price, respectively. WTP varied significantly by age, farm size, income source, and gender. The inelastic nature of WTP and the observed gender gap-where only 40% of female-headed households exhibited WTP at the market price compared to 60% of male-headed households-highlight the need for gender-responsive, non-price interventions such as targeted subsidies, smaller input packages, and inclusive extension services to promote equitable access and uptake of improved sorghum varieties.

摘要

高粱是关键的粮食安全作物之一,在埃塞俄比亚水分胁迫地区尤为如此。然而,由于缺乏组织完善的正规种子体系,公共研究机构持续推广和传播改良高粱品种以鼓励采用。另一方面,缺乏关于小农户对改良品种需求的证据,这使得种子行业不愿投资于高粱等边缘化作物,而更倾向于投资小麦和玉米等商业化程度更高的作物。本研究评估了生产者对适合水分胁迫高粱种植农业生态环境的改良高粱品种的支付意愿(WTP)。使用与规模成比例的概率抽样技术(PPS)从659户家庭收集了数据。采用描述性统计、异质性分析和广义有序概率计量经济模型进行数据分析。农民的支付意愿平均比政府设定的市场价格高59%。在阿姆哈拉和奥罗米亚地区,支付意愿分别比官方价格高出67%和47%。支付意愿因年龄、农场规模、收入来源和性别而有显著差异。支付意愿的无弹性性质以及观察到的性别差距(与60%的男性户主家庭相比,只有40%的女性户主家庭按市场价格表现出支付意愿)凸显了需要采取针对性别的非价格干预措施,如定向补贴、小包装投入品和包容性推广服务,以促进公平获取和采用改良高粱品种。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/e1ac/12413081/f8375218d8e9/pone.0315985.g001.jpg

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