干旱区生态环境知识资源中心(Arid): Narrowing maize yield gaps across smallholder farming systems in Zambia: what interventions, where, and for whom?

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DOI	10.1007/s13593-023-00872-1
	Narrowing maize yield gaps across smallholder farming systems in Zambia: what interventions, where, and for whom?
	Silva, Joao Vasco; Baudron, Frederic; Ngoma, Hambulo; Nyagumbo, Isaiah; Simutowe, Esau; Kalala, Kelvin; Habeenzu, Mukwemba; Mphatso, Mtendere; Thierfelder, Christian
通讯作者	Silva, JV
来源期刊	AGRONOMY FOR SUSTAINABLE DEVELOPMENT
ISSN	1774-0746
EISSN	1773-0155
出版年	2023
卷号	43 期号:2
英文摘要	Maize production in Zambia must increase with a view towards improved food security and reduced food imports whilst avoiding cropland expansion. To achieve this, it is important to understand the causes behind the large maize yield gaps observed in smallholder farming systems across the country. This is the first study providing a yield gap decomposition for maize in Zambia, and combining it with farm typology delineation, to identify the key limiting factors to maize yield gaps across the diversity of farms in the country. The analysis builds upon a nationally representative household survey covering three growing seasons and crop model simulations to benchmark on-farm maize yields and N application rates. Three farm types were delineated, including households for which maize is a marginal crop, households who are net buyers of maize, and households who are market-oriented maize producers. Yield gap closure was about 20% of the water-limited yield, corresponding to an actual yield of 2.4 t ha(- 1). Market-oriented maize farms yielded slightly more than the other farm types, yet the drivers of yield variability were largely consistent across farm types. The large yield gap was mostly attributed to the technology yield gap indicating that more efficient production methods are needed to raise maize yields beyond the levels observed in highest yielding fields. Yet, narrowing efficiency and resource yield gaps through improved crop management (i.e., sowing time, plant population, fertilizer inputs, and weed control) could more than double current yields. Creating a conducive environment to increase maize production should focus on the dissemination of technologies that conserve soil moisture in semi-arid areas and improve soil health in humid areas. Recommendations of sustainable intensification practices need to consider profitability, risk, and other non-information constraints to improved crop management and must be geographically targeted to the diversity of farming systems across the country.
英文关键词	Food security Sustainable intensification Farm typology Global Yield Gap Atlas Fertilizer input subsidy program
类型	Article
语种	英语
开放获取类型	Green Published, hybrid
收录类别	SCI-E
WOS记录号	WOS:000936032500001
WOS关键词	SUB-SAHARAN AFRICA ; CONSERVATION AGRICULTURE ; CLIMATE-CHANGE ; INTENSIFICATION ; FERTILIZER ; EFFICIENCY ; EASTERN
WOS类目	Agronomy ; Green & Sustainable Science & Technology
WOS研究方向	Agriculture ; Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/395169
推荐引用方式 GB/T 7714	Silva, Joao Vasco,Baudron, Frederic,Ngoma, Hambulo,et al. Narrowing maize yield gaps across smallholder farming systems in Zambia: what interventions, where, and for whom?[J],2023,43(2).
APA	Silva, Joao Vasco.,Baudron, Frederic.,Ngoma, Hambulo.,Nyagumbo, Isaiah.,Simutowe, Esau.,...&Thierfelder, Christian.(2023).Narrowing maize yield gaps across smallholder farming systems in Zambia: what interventions, where, and for whom?.AGRONOMY FOR SUSTAINABLE DEVELOPMENT,43(2).
MLA	Silva, Joao Vasco,et al."Narrowing maize yield gaps across smallholder farming systems in Zambia: what interventions, where, and for whom?".AGRONOMY FOR SUSTAINABLE DEVELOPMENT 43.2(2023).