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应对马里农业生态系统服务与适应气候变化之间的权衡

Confronting Tradeoffs Between Agricultural Ecosystem Services and Adaptation to Climate Change in Mali.

作者信息

Waldman Kurt B, Richardson Robert B

机构信息

Department of Geography, Indiana University, 513 N. Park Ave., Bloomington, IN 47408, USA.

Department of Community Sustainability, Michigan State University, 480 Wilson Rd., East Lansing, MI 48824, USA.

出版信息

Ecol Econ. 2018 Aug;150:184-193. doi: 10.1016/j.ecolecon.2018.04.003.

Abstract

Changing climatic conditions present new challenges for agricultural development in sub-Saharan Africa. Sorghum has proven to be an adaptable and resilient crop despite limited funding for crop development. Recent breeding efforts target hybrid and perennial technologies that may facilitate adaptation to climate change. Advantages of perennial crops over their annual counterparts include improved soil quality and water conservation and reduced inputs and labor requirements. In contrast, hybrid crops are often bred for improved grain yield and earlier maturation to avoid variable conditions. We use discrete choice experiments to model adoption of sorghum as a function of attributes that differ between these technologies and traditional varieties in Mali. Overall, the main perceived advantage of perennial crops is agricultural ecosystem services such as soil improvement, while adoption of hybrid crops is hampered by the inability to reuse seed. Women farmers are less concerned about higher labor requirements associated with perennial crops and the ability to reuse hybrids seeds than male farmers. Farmers prefer traditional sorghum to perennial sorghum and are indifferent between traditional and hybrid sorghum. These findings have important policy implications for understanding tradeoffs that are central to farmer decision making when it comes to breeding technologies for climate adaptation.

摘要

气候变化给撒哈拉以南非洲地区的农业发展带来了新挑战。尽管作物开发资金有限,但高粱已被证明是一种适应性强且有韧性的作物。近期的育种工作致力于杂交和多年生技术,这些技术可能有助于适应气候变化。多年生作物相较于一年生作物的优势包括改善土壤质量、节约用水以及减少投入和劳动力需求。相比之下,杂交作物通常通过培育来提高谷物产量并提前成熟,以规避多变的环境条件。我们运用离散选择实验,将马里这些技术与传统品种之间存在差异的属性作为函数,对高粱的采用情况进行建模。总体而言,多年生作物主要被认为的优势在于农业生态系统服务,比如土壤改良,而杂交作物的采用则因无法重复利用种子而受阻。相较于男性农民,女性农民对多年生作物较高的劳动力需求以及杂交种子可重复利用的能力不太在意。农民更喜欢传统高粱而非多年生高粱,并且对传统高粱和杂交高粱持中立态度。这些发现对于理解在气候适应育种技术方面,那些对农民决策至关重要的权衡取舍具有重要的政策意义。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/3da9/5985716/8c81ed5bf6c3/gr1.jpg

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