DOI: 10.1016/j.gloenvcha.2020.102127
论文题名: Does smallholder maize intensification reduce deforestation? Evidence from Zambia
作者: Pelletier J. ; Ngoma H. ; Mason N.M. ; Barrett C.B.
刊名: Global Environmental Change
ISSN: 9593780
出版年: 2020
卷: 63 语种: 英语
中文关键词: Agricultural intensification
; Deforestation
; Improved maize seed
; Inorganic fertilizer
; Smallholder farmer
英文关键词: agricultural intensification
; crop yield
; deforestation
; fertilizer application
; food production
; food security
; land use change
; seed production
; smallholder
; soil quality
; Sub-Saharan Africa
; Zambia
; Zea mays
英文摘要: Increasing food production to meet growing demand while reducing tropical deforestation is a critical sustainability challenge. This is especially true in sub-Saharan Africa, which faces serious food insecurity issues and where smallholder farming is the main driver of forest conversion. Competing theories imply opposite predictions as to whether deforestation increases or decreases with smallholder agricultural intensification, which can improve food security by increasing crop yields per area cultivated. This research provides new empirical evidence on the association between deforestation and smallholders’ use of modern inputs, in particular inorganic fertilizer on maize and improved maize seeds, using Zambia as a case study. We analyze this association nationwide in a spatially disaggregated manner at the lowest administrative level using machine learning-based small area estimation, which makes use of detailed nationally representative surveys on smallholder farm households for 2011 and 2014, and census data to statistically predict modern inputs use country-wide for 2011, when average maize yields were 1.28 tons/ha. Then, we evaluate the association between improved maize seed and fertilizer inputs and subsequent deforestation, while controlling for key geospatial covariates. The results support the land-sparing hypothesis, finding that smallholder farmers’ use of improved maize seed is negatively associated with deforestation on non-acidic (pH ≥ 5.5) soils, an effect that is enhanced by complementary inorganic fertilizer use. Fertilizer use on its own, however, is weakly associated with increased deforestation. Sustainable intensification via use of improved seeds on adequately fertile soils and improving soil health appears compatible with reducing both deforestation and food insecurity. © 2020 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168220
Appears in Collections: 气候变化与战略
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作者单位: Cornell Atkinson Center for Sustainability, Cornell University, Ithaca, NY, United States; Charles H. Dyson School of Applied Economics and Management, Cornell University, Ithaca, NY, United States; Indaba Agricultural Policy Research Institute, Lusaka, Zambia, Zambia; Department of Agricultural, Food, and Resource Economics, Michigan State University, East Lansing, MI, United States
Recommended Citation:
Pelletier J.,Ngoma H.,Mason N.M.,et al. Does smallholder maize intensification reduce deforestation? Evidence from Zambia[J]. Global Environmental Change,2020-01-01,63