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Prediction of nitrogen mineralization from novel bio-based fertilizers using chemical extractions

Agostini, L.; Bünemann, E. K.; Jakobsen, C.; Salo, T.; Wester-Larsen, L. and Symanczik, S. (2024) Prediction of nitrogen mineralization from novel bio-based fertilizers using chemical extractions. Environmental Technology & Innovation, 36 (103781), pp. 1-13.

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Document available online at: https://www.sciencedirect.com/science/article/pii/S2352186424002578?via%3Dihub


Summary in the original language of the document

Bio-based fertilizers (BBFs) are an increasingly important source of nutrients in agriculture, promoted by the new EU fertilizer regulation aiming to enable a circular bioeconomy. Predicting the mineralization-dependent nutrient release of BBFs is critical for their appropriate use and to
minimize environmental losses. We assessed mineralizable nitrogen (N) and carbon (C) of a representative selection of 32 BBFs and evaluated a set of chemical extraction methods to predict their N mineralization dynamics. In 84-day aerobic incubations, cumulative mineral N release varied between 13 and 100 % of amended N. Mineralized C ranged from 10 % to 117 % of amended C. Based on the dynamics of N and C mineralization, BBFs were classified into five
significantly different groups. Among the tested chemical indicators of N mineralization from BBFs, cold and hot water presented the lowest extraction intensities, followed by hot potassium chloride and hot sulfuric acid extractions, while C:N ratio is based on total contents. Mineral N released almost immediately was best predicted by cold water extractable N, while hot sulfuric acid extractable N and C:N ratio predicted N released after the first two weeks and after 84 days, respectively. The combination of these three indicators was able to discriminate BBFs into four
out of five mineralization classes. Such a cost-effective yet accurate estimation of N mineralization dynamics from BBFs can therefore be used as a basis to inform farmers on suitable timing and amount of BBF application, improving the synchrony between N release from BBFs and crop N demand.


EPrint Type:Journal paper
Keywords:Bio-based fertilizers, mineralization, chemical predictors, soil incubation, Abacus, FiBL1012804, LEX4BIO
Agrovoc keywords:
Language
Value
URI
English
fertilisers -> fertilizers
http://aims.fao.org/aos/agrovoc/c_2867
English
mineralization
http://aims.fao.org/aos/agrovoc/c_15999
English
bioeconomy
http://aims.fao.org/aos/agrovoc/c_bcba0163
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Nutrient management
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Soil > Soil quality
Horizon Europe or H2020 Grant Agreement Number:818309
DOI:doi.org/10.1016/j.eti.2024.103781
Related Links:https://lex4bio.eu/, https://www.fibl.org/en/themes/projectdatabase/projectitem/project/1693
Deposited By: Ellenberger, Maura
ID Code:52977
Deposited On:23 Aug 2024 07:29
Last Modified:23 Aug 2024 07:33
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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