Mineral nitrogen captured in field-aged biochar is plant-available.

ABSTRACT: Biochar may serve as a tool to sustainably mitigate climate change via carbon sequestration and by improving soil fertility. Biochar has shown to retain nitrate in its pores, which increases with an organic coating of the inner surfaces and residence time in soil ("aging"). Here we investigated the plant accessibility of the captured nitrate in field-aged biochar, as a pre-requisite for developing carbon-based N fertilization techniques with environmental benefits. Based on previous results, we hypothesized that part of the biochar-captured nitrate would remain unavailable for plants. A two-factorial greenhouse experiment was designed, where the N was applied either as Ca(NO₃)₂ or as N captured in field-aged biochar at five increasing N doses to quinoa and perennial r

SUBMITTER: Haider G 

PROVIDER: S-EPMC7427999 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature