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Agronomy 2019, 9(3), 122; https://doi.org/10.3390/agronomy9030122

Ammonium Sorbed to Zeolite Is Partly Available to Wheat in the First Growth Cycle

1
Environment and Natural Resources, Norwegian Institute of Bioeconomy Research, P.O. Box 115, N-1431 Ås, Norway
2
Present address: Smart Symbiotech AS, Vangsveien 10, 1814 Askim, Norway
3
University of Debrecen, Research Institute of Nyíregyháza, P.O. Box 12, 4400 Nyíregyháza, Hungary
*
Author to whom correspondence should be addressed.
Received: 31 January 2019 / Revised: 26 February 2019 / Accepted: 28 February 2019 / Published: 5 March 2019
(This article belongs to the Section Soil and Plant Nutrition)
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Abstract

Sorption could be a way to concentrate nutrients in diluted waste streams to bring more nutrients back to agriculture. However, the sorbed nutrients must be plant available. The aim of this work was to investigate how plant available nitrogen (N) added sorbed to zeolite and is compared to conventionally added N. First, 15N labelled ammonium was sorbed to a sorbent, zeolite, in an aqueous solution. Then, the fertilizer effect was compared to the ammonium fertilizer and added the conventional way, with and without zeolite. A pot experiment with two soil types (chernozem and sandy soil) and wheat as test crop was used. Results indicated that the fertilizer effect of sorbed ammonium in the first growth cycle is about 50% of ammonium added conventionally. The sorbent itself had a positive effect in sandy soil, but not in chernozem. N uptake without added N was higher in chernozem than in sandy soil and more N from fertilizer was left in the soil after the experiment in the chernozem than in the sandy soil. In conclusion, ammonium added sorbed is plant available to some extent, but less so than conventionally added ammonium. View Full-Text
Keywords: sorption; zeolite; nitrogen; ammonium; nutrient availability sorption; zeolite; nitrogen; ammonium; nutrient availability
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Foereid, B.; Alvarenga, E.; Szocs, J.; Makadi, M. Ammonium Sorbed to Zeolite Is Partly Available to Wheat in the First Growth Cycle. Agronomy 2019, 9, 122.

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