Plant growth improvement mediated by nitrate capture in co-composted biochar

  • Kammann C
  • Schmidt H
  • Messerschmidt N
 et al. 
  • 133


    Mendeley users who have this article in their library.
  • 64


    Citations of this article.


Soil amendment with pyrogenic carbon (biochar) is discussed as strategy to improve soil fertility to enable economic plus environmental benefits. In temperate soils, however, the use of pure biochar mostly has moderately-negative to positive yield effects. Here we demonstrate that co-composting consideably promoted biochars' positive effects, largely by nitrate (nutrient) capture and delivery. In a full-factorial growth study with Chenopodium quinoa, biomass yield increased up to 305% in a sandy-poor soil amended with 2% (w/w) co-composted biochar (BCcomp). Conversely, addtition of 2% (BCcomp) as well as growth-reducing (BCpure) effects were more pronounced at lower nutrient-supply levels. Electro-ultra filtration and sequential biochar-particle washing revealed that co-composted biochar was nutrient-enriched, particularly with the anions nitrate and phosphate. The captured nitrate in BCcomp was (1) only partly detectable with standard methods, (2) largely protected against leaching, (3) partly plant-available, and (4) did not stimulate N2O emissions. We hypothesize that surface ageing plus non-conventional ion-water bonding in micro- and nano-pores promoted nitrate capture in biochar particles. Amending (N-rich) bio-waste with biochar my enhance its agronomics value and reduce nutrient losses from bio-wastes and agricultural soils.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Claudia I. Kammann

  • Hans Peter Schmidt

  • Nicole Messerschmidt

  • Sebastian Linsel

  • Diedrich Steffens

  • Christoph Müller

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free