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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.)

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(s): 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
Deposited On:09 May 2019 00:09
Last Modified:09 May 2019 00:09

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