Biotic strategies to increase plant availability of sewage sludge ash phosphorus

Nelly Sophie Raymond; Dorette Müller Stöver; Alan E. Richardson; Henrik Hauggaard Nielsen; Lars Stoumann Jensen

doi:10.1002/jpln.201800154

Biotic strategies to increase plant availability of sewage sludge ash phosphorus

Nelly Sophie Raymond, Dorette Müller Stöver, Alan E. Richardson, Henrik Hauggaard Nielsen, Lars Stoumann Jensen^*

^*Corresponding author af dette arbejde

Plante- og Jordvidenskab

3 Citationer (Scopus)

Abstract

Sewage sludge incineration-ash (FB-I) represents a potential alternative phosphorus (P) fertiliser with a high concentration of P, although with relatively low crop availability. In this study, we investigated two P-solubilisation approaches (acidification and P mobilisation by citrate) to enhance plant P uptake from the FB-I ash in a pot study by using various biotic strategies: (1) a pre-treatment of ash with a Penicillium bilaiae inoculum, (2) an isogenic line of wheat that excretes citrate from the root tip, (3) nitrogen (N) provided as (Formula presented.) combined with nitrification inhibitor dicyandiamide (DCD). All strategies were tested combined with each other and with different methods for ash application: (1) completely mixed within the top one third of soil in a pot, or (2) applied as distinct band at 10 cm depth. Triple super phosphate (TSP) at a rate of 15 mg P kg⁻¹ soil per pot was sufficient to support maximum shoot growth. Ash mixed into the first top third part of soil in the pot at a rate of 180 mg P kg⁻¹ soil (equivalent to 60 mg P kg⁻¹ soil throughout the pot) significantly increased the soil water-extractable P and the subsequent shoot P uptake and shoot biomass for both wheat lines and microbial pre-treatment to support maximum plant performance. Shoot P concentration in these treatments was further enhanced when the plants received (Formula presented.) and DCD, although not leading to a significant increase in shoot biomass. The citrate secretion by the root tips and pre-inoculation with P. bilaiae of the ash did not influence plant growth. In conclusion, root-zone soil acidification by (Formula presented.) nutrition is regarded as a promising strategy to improve the fertilising effect of such alternative P fertilisers originating from urban waste streams.

Originalsprog	Engelsk
Tidsskrift	Journal of Plant Nutrition and Soil Science
Vol/bind	182
Udgave nummer	2
Sider (fra-til)	175-186
ISSN	1436-8730
DOI	https://doi.org/10.1002/jpln.201800154
Status	Udgivet - apr. 2019

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title = "Biotic strategies to increase plant availability of sewage sludge ash phosphorus",

abstract = "Sewage sludge incineration-ash (FB-I) represents a potential alternative phosphorus (P) fertiliser with a high concentration of P, although with relatively low crop availability. In this study, we investigated two P-solubilisation approaches (acidification and P mobilisation by citrate) to enhance plant P uptake from the FB-I ash in a pot study by using various biotic strategies: (1) a pre-treatment of ash with a Penicillium bilaiae inoculum, (2) an isogenic line of wheat that excretes citrate from the root tip, (3) nitrogen (N) provided as (Formula presented.) combined with nitrification inhibitor dicyandiamide (DCD). All strategies were tested combined with each other and with different methods for ash application: (1) completely mixed within the top one third of soil in a pot, or (2) applied as distinct band at 10 cm depth. Triple super phosphate (TSP) at a rate of 15 mg P kg−1 soil per pot was sufficient to support maximum shoot growth. Ash mixed into the first top third part of soil in the pot at a rate of 180 mg P kg−1 soil (equivalent to 60 mg P kg−1 soil throughout the pot) significantly increased the soil water-extractable P and the subsequent shoot P uptake and shoot biomass for both wheat lines and microbial pre-treatment to support maximum plant performance. Shoot P concentration in these treatments was further enhanced when the plants received (Formula presented.) and DCD, although not leading to a significant increase in shoot biomass. The citrate secretion by the root tips and pre-inoculation with P. bilaiae of the ash did not influence plant growth. In conclusion, root-zone soil acidification by (Formula presented.) nutrition is regarded as a promising strategy to improve the fertilising effect of such alternative P fertilisers originating from urban waste streams.",

keywords = "acidification, nitrification inhibitor, P recovery strategies, P solubilising microorganisms, root exudates, sewage sludge ash",

author = "Raymond, {Nelly Sophie} and {M{\"u}ller St{\"o}ver}, Dorette and Richardson, {Alan E.} and Nielsen, {Henrik Hauggaard} and {Stoumann Jensen}, Lars",

year = "2019",

month = apr,

doi = "10.1002/jpln.201800154",

language = "English",

volume = "182",

pages = "175--186",

journal = "Journal of Plant Nutrition and Soil Science",

issn = "1436-8730",

publisher = "Wiley - V C H Verlag GmbH & Co. KGaA",

number = "2",

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TY - JOUR

T1 - Biotic strategies to increase plant availability of sewage sludge ash phosphorus

AU - Raymond, Nelly Sophie

AU - Müller Stöver, Dorette

AU - Richardson, Alan E.

AU - Nielsen, Henrik Hauggaard

AU - Stoumann Jensen, Lars

PY - 2019/4

Y1 - 2019/4

N2 - Sewage sludge incineration-ash (FB-I) represents a potential alternative phosphorus (P) fertiliser with a high concentration of P, although with relatively low crop availability. In this study, we investigated two P-solubilisation approaches (acidification and P mobilisation by citrate) to enhance plant P uptake from the FB-I ash in a pot study by using various biotic strategies: (1) a pre-treatment of ash with a Penicillium bilaiae inoculum, (2) an isogenic line of wheat that excretes citrate from the root tip, (3) nitrogen (N) provided as (Formula presented.) combined with nitrification inhibitor dicyandiamide (DCD). All strategies were tested combined with each other and with different methods for ash application: (1) completely mixed within the top one third of soil in a pot, or (2) applied as distinct band at 10 cm depth. Triple super phosphate (TSP) at a rate of 15 mg P kg−1 soil per pot was sufficient to support maximum shoot growth. Ash mixed into the first top third part of soil in the pot at a rate of 180 mg P kg−1 soil (equivalent to 60 mg P kg−1 soil throughout the pot) significantly increased the soil water-extractable P and the subsequent shoot P uptake and shoot biomass for both wheat lines and microbial pre-treatment to support maximum plant performance. Shoot P concentration in these treatments was further enhanced when the plants received (Formula presented.) and DCD, although not leading to a significant increase in shoot biomass. The citrate secretion by the root tips and pre-inoculation with P. bilaiae of the ash did not influence plant growth. In conclusion, root-zone soil acidification by (Formula presented.) nutrition is regarded as a promising strategy to improve the fertilising effect of such alternative P fertilisers originating from urban waste streams.

AB - Sewage sludge incineration-ash (FB-I) represents a potential alternative phosphorus (P) fertiliser with a high concentration of P, although with relatively low crop availability. In this study, we investigated two P-solubilisation approaches (acidification and P mobilisation by citrate) to enhance plant P uptake from the FB-I ash in a pot study by using various biotic strategies: (1) a pre-treatment of ash with a Penicillium bilaiae inoculum, (2) an isogenic line of wheat that excretes citrate from the root tip, (3) nitrogen (N) provided as (Formula presented.) combined with nitrification inhibitor dicyandiamide (DCD). All strategies were tested combined with each other and with different methods for ash application: (1) completely mixed within the top one third of soil in a pot, or (2) applied as distinct band at 10 cm depth. Triple super phosphate (TSP) at a rate of 15 mg P kg−1 soil per pot was sufficient to support maximum shoot growth. Ash mixed into the first top third part of soil in the pot at a rate of 180 mg P kg−1 soil (equivalent to 60 mg P kg−1 soil throughout the pot) significantly increased the soil water-extractable P and the subsequent shoot P uptake and shoot biomass for both wheat lines and microbial pre-treatment to support maximum plant performance. Shoot P concentration in these treatments was further enhanced when the plants received (Formula presented.) and DCD, although not leading to a significant increase in shoot biomass. The citrate secretion by the root tips and pre-inoculation with P. bilaiae of the ash did not influence plant growth. In conclusion, root-zone soil acidification by (Formula presented.) nutrition is regarded as a promising strategy to improve the fertilising effect of such alternative P fertilisers originating from urban waste streams.

KW - acidification

KW - nitrification inhibitor

KW - P recovery strategies

KW - P solubilising microorganisms

KW - root exudates

KW - sewage sludge ash

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U2 - 10.1002/jpln.201800154

DO - 10.1002/jpln.201800154

M3 - Journal article

AN - SCOPUS:85058961930

SN - 1436-8730

VL - 182

SP - 175

EP - 186

JO - Journal of Plant Nutrition and Soil Science

JF - Journal of Plant Nutrition and Soil Science

IS - 2

ER -

Biotic strategies to increase plant availability of sewage sludge ash phosphorus

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