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Introducing urine-enriched biochar-based fertilizer for vegetable production: acceptability and results from rural Bangladesh

Authors

Sutradhar,  Ipsita
External Organizations;

Jackson-deGraffenried,  Meredith
External Organizations;

Akter,  Sayema
External Organizations;

McMahon,  Shannon A.
External Organizations;

/persons/resource/waid

Waid,  Jillian Lee
Potsdam Institute for Climate Impact Research;

Schmidt,  Hans-Peter
External Organizations;

/persons/resource/Amanda.Wendt

Wendt,  Amanda
Potsdam Institute for Climate Impact Research;

/persons/resource/gabrysch

Gabrysch,  Sabine
Potsdam Institute for Climate Impact Research;

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25368oa.pdf
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Citation

Sutradhar, I., Jackson-deGraffenried, M., Akter, S., McMahon, S. A., Waid, J. L., Schmidt, H.-P., Wendt, A., Gabrysch, S. (2021 online): Introducing urine-enriched biochar-based fertilizer for vegetable production: acceptability and results from rural Bangladesh. - Environment, Development and Sustainability.
https://doi.org/10.1007/s10668-020-01194-y


Cite as: https://publications.pik-potsdam.de/pubman/item/item_25368
Abstract
Improved agricultural practices that increase yields and preserve soils are critical to addressing food insecurity and undernutrition among smallholder farmer families. Urine-enriched biochar has been shown to be an accessible and effective fertilization option in various subtropical countries; however, it is new to Bangladesh. To better understand attitudes and experiences preparing and using urine-enriched biochar fertilizer, mixed-methods research was undertaken among smallholder farmers in northeastern Bangladesh in 2016/2017. In-depth interviews were conducted with 25 respondents who had compared the production of crops grown with biochar-based fertilizer to usual practice. In addition, in areas where trainings on biochar-based fertilization had been offered, 845 farmers were asked about their experience through a quantitative survey. Interview results indicated that cow urine-enriched biochar was favored over human urine because cow urine was perceived as clean and socially acceptable, whereas human urine was considered impure and disgusting. Respondents praised biochar-based fertilizer because it increased yields, cost little, was convenient to prepare with readily available natural materials, produced tastier crops, and allowed families to share their larger yields which in turn enhanced social and financial capital. Comparative field trials indicated a 60% yield benefit in both cabbage and kohlrabi crops. Challenges included uneven access to ingredients, with some respondents having difficulty procuring cow urine and biomass feedstock. The low social, health, and financial risk of adoption and the perceived benefits motivated farmers to produce and apply biochar-based fertilizer in their gardens, demonstrating strong potential for scale-up of this technology in Bangladesh.