Circulaire groeimedia 2022, teeltproef: Labbepalingen en teeltproef in Bleiswijk, WP 2

Barbara Eveleens, Daan Adank, Chris Blok

Research output: Book/ReportReportProfessional

Abstract

As part of a larger project, the potential added value of co-composting biochar in a green compost for 3 months was examined. The benefits expected in advance were a) a binding of ammonium and nitrate in the biochar to negative and positive charge sites, respectively; b) a richer microbial life in the biochar; c) a higher survival of a microbial biostimulant when pre-added to a biochar/green compost. The results show that co-composting did not affect the water holding capacity of the biochar or of blends of the biochar with other components. However, contrary to expectations, the yield in blends with biochar decreased by almost 10%. The reduced growth is attributed to too low nitrate levels in the biochar treatments, sometimes in combination with a too high K/Ca ratio. The results also show that the biochar does indeed contain more nitrogen after co-composting and that this also leads to a higher microbial presence. The nitrogen does not appear to be bound to charged sites, but appears to be incorporated in the microorganisms in the biochar. Adding the microbial biostimulant Biovin had no measured effects.
Original languageDutch
Place of PublicationWageningen
PublisherWageningen Plant Research
Number of pages32
DOIs
Publication statusPublished - 2024

Publication series

NameRapport / Stichting Wageningen Research, Wageningen Plant Research, Businessunit Glastuinbouw
No.WPR-1344

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