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The effect of soil organic matter on plant mineral nutrition

Code: 9781786766571
O. Urrutia, J. Erro, M. Fuentes, M. Olaetxea and M. Garnica, University of Navarra, Spain; R. Baigorri, TIMAC AGRO, UK; A. M. Zamarreño, M. Movila and D. De Hita, University of Navarra, Spain; and J. M. Garcia-Mina, University of Navarra, Spain and Centre Mondial De L’Innovation Roullier, France

Chapter synopsis: The role of soil humus in soil fertility and crop production has been well established by many studies and practical farming experience. This role is related to the presence of a family of organic substances, known as humic substances, with the capacity to increase the pool of plant-available nutrients in soil for root uptake. The improvement in plant growth and mineral nutrition is directly linked to the physicochemical features of humic substances, and more specifically, to their capacity to form stable chemical complexes with metals. This chapter reviews the main mechanisms behind the action of humic substances in improving plant mineral nutrition. It also discusses the main signalling pathways that might be involved in the regulation of these humic substances.

DOI: 10.19103/AS.2019.0062.14
Table of contents 1 Introduction 2 The main mechanisms involved in the beneficial action of humic substances on plant mineral nutrition: the complexing and biochemical pathways 3 A possible signalling crosstalk between the biochemical and complexing pathways 4 Conclusion 5 Acknowledgements 6 Where to look for further information 7 References

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