Journal
AGRONOMY-BASEL
Volume 10, Issue 9, Pages -Publisher
MDPI
DOI: 10.3390/agronomy10091395
Keywords
frass fertilizer; Hermertia illucens; maize; nitrogen fertilizer equivalence; nitrogen mineralization; nitrogen synchrony
Categories
Funding
- Canadian International Development Research Centre (IDRC)
- Australian Centre for International Agricultural Research (ACIAR) (INSFEED-Phase 2: Cultivate Grant) [108866-001]
- Netherlands Organization for Scientific Research, the WOTRO Science for Global Development (NWO-WOTRO) [ILIPA-W 08.250.202]
- Rockefeller Foundation through the International Centre of Insect Physiology and Ecology (ICIPE) [2018 FOD 009]
- United Kingdom's Foreign, Commonwealth & Development Office (FCDO)
- Swedish International Development Cooperation Agency (Sida)
- Swiss Agency for Development and Cooperation (SDC)
- Federal Democratic Republic of Ethiopia
- Government of the Republic of Kenya
- German Academic Exchange Service (DAAD) In-Region Postgraduate Scholarship
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The use of black soldier fly frass fertilizer (BSFFF) is being promoted globally. However, information on nitrogen (N) fertilizer equivalence (NFE) value and synchrony of N mineralization for crop production remains largely unknown. Comparative studies between BSFFF and commercial organic fertilizer (SAFI) were undertaken under field conditions to determine synchrony of N release for maize uptake. The BSFFF, SAFI, and urea fertilizers were applied at the rates of 0, 30, 60, and 100 kg N ha(-1). The yield data from urea treated plots were used to determine the NFE of both organic inputs. Results showed that maize from BSFFF treated plots had higher N uptake than that from SAFI treated plots. High N immobilization was observed throughout the active growth stages of maize grown in soil amended with BSFFF, whereas soil treated with SAFI achieved net N release at the silking stage. Up to three times higher negative N fluxes were observed in SAFI amended soils as compared with BSFFF treated plots at the tasseling stage. The BSFFF applied at 30 and 60 kg N ha(-1)achieved significantly higher NFE than all SAFI treatments. Our findings revealed that BSFFF is a promising and sustainable alternative to SAFI or urea for enhanced maize production.
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