What is it about?

The work is about how fast or slow Zn is released from seaweed once applied to soil. In addition, a scientific explanation was provided to the observed release using kinetic models.

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Why is it important?

This is the first work that investigated the dynamics of Zn release from seaweed and seaweed-amended soil as revealed by tested kinetic models. Being an organic amendment, a proper understanding of the dynamics of zinc release and its controlling kinetics would inform us on rate, dose and, frequency of application. It is also important in terms of coinciding peak zinc release in seaweed with peak zinc demand in crop.


This article is part of a project which also investigated zinc fertiliser use efficiency and preferential uptake between seaweed (organic) and ZnSO4 (inorganic) fertiliser. It is amazing to discover that seaweed zinc (in its ground form) competes favourably with zinc uptake from inorganic sources by supplying more zinc to wheat compared to zinc from ZnSO4. Given the ongoing global promotion of organic agriculture coupled with widespread zinc deficiency, direct soil application of seaweed (F. serratus) is a viable source of labile zinc and agronomic option to mitigating zinc deficiency.

David Oluwadare
Teesside University

Read the Original

This page is a summary of: Kinetics of water-extractable zinc release from seaweed (Fucus serratus ) as soil amendment, Journal of Plant Nutrition and Soil Science, February 2020, Wiley,
DOI: 10.1002/jpln.201900398.
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