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, Nicole P. and Edwards, David G. and Thompson, John 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 0032-079X

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.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Published online: 15 April 2019. Permanent restricted access to ArticleFirst version, in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Faculty/School / Institute/Centre: Current - Institute for Life Sciences and the Environment - Centre for Crop Health (24 Mar 2014 -)
Date Deposited: 04 Jul 2019 02:10
Last Modified: 05 Jul 2019 04:42
Uncontrolled Keywords: Mitscherlich response surface, linseed, flax, Arbuscularmycorrhizae, Funneliformis mosseae, Linum usitatissimum, phosphorus, zinc
Fields of Research : 07 Agricultural and Veterinary Sciences > 0703 Crop and Pasture Production > 070306 Crop and Pasture Nutrition
06 Biological Sciences > 0605 Microbiology > 060505 Mycology
Socio-Economic Objective: B Economic Development > 82 Plant Production and Plant Primary Products > 8205 Winter Grains and Oilseeds > 820504 Linseed
Funding Details:
Identification Number or DOI: 10.1007/s11104-019-04065-2
URI: http://eprints.usq.edu.au/id/eprint/36589

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