Publikasjoner
NIBIOs ansatte publiserer flere hundre vitenskapelige artikler og forskningsrapporter hvert år. Her finner du referanser og lenker til publikasjoner og andre forsknings- og formidlingsaktiviteter. Samlingen oppdateres løpende med både nytt og historisk materiale. For mer informasjon om NIBIOs publikasjoner, besøk NIBIOs bibliotek.
2025
Forfattere
Corinne Butler Amber Moore Nicole AndersonSammendrag
Black soldier fly larvae (BSFL) frass, a byproduct of insect farming, can be used as a nitrogen (N) source in cereal production, although its impacts on grain protein, grain yield, and nitrate (NO3-N) leaching are not well understood. This study determined the effect of different BSFL frass and urea combinations on hard red spring (HRS) wheat grain protein, grain yield, above-ground N uptake, post-harvest soil N, and NO3-N leaching. Wheat response to three urea/BSFL frass blends (100% urea/0% frass, 67% urea/33% frass, and 33% urea/67% frass) was evaluated at two N rates (141 and 281 kg N ha-1) alongside a non-amended control in a greenhouse using a Willamette silt loam (soil NO3-N concentration of 13.6 mg kg-1). At 141 kg N ha-1, increasing frass-N from 0 to 67% of the total N in the urea-frass blends caused a linear decline in grain yield from 26 to 19 g pot-1, with grain protein only declining from 33 to 67% frass-N. At 281 kg N ha-1, yield, protein, and plant N uptake declined when frass-N increased from 33 to 67%. Replacing 33% urea-N with frass-N at 281 kg N ha-1 decreased soil NO3-N by 86%. A leaching component showed NO3-N leaching was 17x higher for 100% urea than the 33% urea/67% BSFL frass blend at 281 kg N ha-1. Gradual mineralization of organic frass-N may have limited N early in the season, decreasing yield at increased frass proportions, whereas extended N mineralization later in the season helped maintain grain protein concentrations. Continued plant N uptake and unreleased organic frass-N at season’s end likely decreased soil NO3-N accumulation with frass blends. These results indicate that substituting up to one-third of urea with BSFL frass at recommended N rates may sustain HRS wheat grain yield and grain protein while substantially reducing NO3-N leaching potential.
Forfattere
Trygve S. AamlidSammendrag
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Forfattere
Trygve S. AamlidSammendrag
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