Sustainability Research Institute, School of Earth and Environment, University of Leeds, Leeds, LS2 9JT, United Kingdom.
Kulima Integrated Development Solutions (Pty) Ltd, Hilton, South Africa; School of Architecture and Planning, University of Witwatersrand, Johannesburg, WITS 2050, South Africa.
J Environ Manage. 2017 Jun 15;195(Pt 1):25-34. doi: 10.1016/j.jenvman.2016.09.076. Epub 2016 Sep 29.
Conservation agriculture (CA) practices of reduced soil tillage, permanent organic soil coverage and intercropping/crop rotation, are being advocated globally, based on perceived benefits for crop yields, soil carbon storage, weed suppression, reduced soil erosion and improved soil water retention. However, some have questioned their efficacy due to uncertainty around the performance and trade-offs associated with CA practices, and their compatibility with the diverse livelihood strategies and varied agro-ecological conditions across African smallholder systems. This paper assesses the role of key institutions in Malawi in shaping pathways towards more sustainable land management based on CA by outlining their impact on national policy-making and the design and implementation of agricultural development projects. It draws on interviews at national, district and project levels and a multi-stakeholder workshop that mapped the institutional landscape of decision-making for agricultural land management practices. Findings identify knowledge gaps and institutional barriers that influence land management decision-making and constrain CA uptake. We use our findings to set out an integrated roadmap of research needs and policy options aimed at supporting CA as a route to enhanced sustainable land management in Malawi. Findings offer lessons that can inform design, planning and implementation of CA projects, and identify the multi-level institutional support structures required for mainstreaming sustainable land management in sub-Saharan Africa.
保护性农业(CA)实践包括减少土壤耕作、永久有机土壤覆盖和间作/轮作,这些实践在全球范围内得到了提倡,其依据是它们对作物产量、土壤碳储存、抑制杂草、减少土壤侵蚀和提高土壤保水能力的益处。然而,由于对 CA 实践的性能和权衡以及它们与非洲小农系统中多样化的生计策略和不同的农业生态条件的兼容性存在不确定性,一些人对其功效提出了质疑。本文通过概述关键机构对国家政策制定以及农业发展项目的设计和实施的影响,评估了马拉维在基于 CA 的更可持续土地管理方面的作用。本文借鉴了国家、地区和项目各级的访谈以及一次多方利益攸关方研讨会,该研讨会绘制了农业土地管理实践决策的机构格局图。研究结果确定了影响土地管理决策并限制 CA 采用的知识差距和机构障碍。我们利用研究结果提出了一个综合的研究需求和政策选择路线图,旨在支持 CA,作为增强马拉维可持续土地管理的途径。研究结果提供了可以为 CA 项目的设计、规划和实施提供信息的经验教训,并确定了在撒哈拉以南非洲实现可持续土地管理主流化所需的多层次机构支持结构。