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A dual rescaled Mitscherlich model of the simultaneous savings in phosphorus and zinc fertiliser from arbuscular mycorrhizal fungal colonisation of linseed (Linum usitatissimum L.)

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Seymour, N. P., Edwards, D. G. and Thompson, J. P. (2019) A dual rescaled Mitscherlich model of the simultaneous savings in phosphorus and zinc fertiliser from arbuscular mycorrhizal fungal colonisation of linseed (Linum usitatissimum L.). Plant and Soil . ISSN 1573-5036

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Article Link: https://doi.org/10.1007/s11104-019-04065-2

Abstract

Aim
This study aimed to determine quantitatively the value of AMF in supporting plant growth at various levels of both P and Zn simultaneously.
Methods
Linseed (Linum usitatissimum L.) was grown in a black vertisol at a range of applied P (0–400 mg/kg soil) and Zn (0–60 mg/kg soil) with and without arbuscular mycorrhizal fungi (AMF) in a glasshouse experiment.
Results
Without AMF, linseed did not respond to either P or Zn applied alone; very high rates of both P (400 mg/kg) and Zn (15 mg/kg) were required for good growth. Plants with AMF grew as well with just 50 mg P/kg and 3.75 mg Zn/kg. AMF markedly increased P content of the linseed whole tops at all levels of P and Zn fertiliser, and increased Zn content in the presence of P fertiliser rates up to 200 mg P/kg. A dual rescaled Mitscherlich equation, with terms for both P and Zn was derived and used to calculate plant growth responses and savings of P and Zn fertiliser by AMF.
Conclusions
AMF are clearly effective in reducing requirements of both P and Zn for efficient production of mycorrhizal-dependent crops. Diagnosis of AMF levels will allow more efficient use of P and Zn fertilisers saving on costly inputs of declining resources.

Item Type:Article
Business groups:Crop and Food Science
Keywords:Mitscherlich response surface Linseed Flax Arbuscular mycorrhizae Funneliformis mosseae Linum usitatissimum Phosphorus Zinc
Subjects:Agriculture > Agriculture (General) > Soils. Soil science > Soil and crops. Soil-plant relationships. Soil productivity
Agriculture > Agriculture (General) > Methods and systems of culture. Cropping systems
Agriculture > Agriculture (General) > Fertilisers
Plant culture > Field crops
Live Archive:09 May 2019 00:09
Last Modified:03 Sep 2021 16:45

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