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Root-induced dissolution of phosphate rock in the rhizosphere of lupins grown in alkaline soil

Dissolution of North Carolina phosphate rock (PR) in the rhizosphere of white lupin (Lupinus albus) and narrow leaf lupin (L. angustifolius) was measured in a growth chamber experiment. Plants were grown for 8-13 days in an artificial soil (pure alumina sand) at alkaline pH to eliminate dissolution... Full description

Journal Title: Australian journal of soil research 1995, Vol.33 (3), p.477-489
Main Author: HINSINGER, P
Other Authors: GILKES, R. J
Format: Electronic Article Electronic Article
Language: English
Subjects:
Agronomy. Soil science and plant productions
Biological and medical sciences
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Life Sciences
Nitrogen, phosphorus, potassium fertilizations
Phosphorus fertilization
Soil-plant relationships. Soil fertility. Fertilization. Amendments
Quelle: Alma/SFX Local Collection
Publisher: Collingwood: Commonwealth Scientific and Industrial Research Organization CSIRO
ID: ISSN: 0004-9573
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recordid: cdi_hal_primary_oai_HAL_hal_02704076v1
title: Root-induced dissolution of phosphate rock in the rhizosphere of lupins grown in alkaline soil
format: Article
creator:
  • HINSINGER, P
  • GILKES, R. J
subjects:
  • Agronomy. Soil science and plant productions
  • Biological and medical sciences
  • Fundamental and applied biological sciences. Psychology
  • General agronomy. Plant production
  • Life Sciences
  • Nitrogen, phosphorus, potassium fertilizations
  • Phosphorus fertilization
  • Soil-plant relationships. Soil fertility. Fertilization. Amendments
ispartof: Australian journal of soil research, 1995, Vol.33 (3), p.477-489
description: Dissolution of North Carolina phosphate rock (PR) in the rhizosphere of white lupin (Lupinus albus) and narrow leaf lupin (L. angustifolius) was measured in a growth chamber experiment. Plants were grown for 8-13 days in an artificial soil (pure alumina sand) at alkaline pH to eliminate dissolution of PR due to reaction with the soil. Phosphate rock was supplied as the sole source of P and Ca for the plants at two rates of application (0.1 and 1 mg P g-1 soil). Both species dissolved considerable amounts of PR (up to 70% of PR present within 3 mm from the roots). Phosphorus extracted from the soil with 0.5 M NaOH showed that up to 69% of dissolved P accumulated in the rhizosphere of both species due to sorption by the soil, particularly at the high rate of application. Only white lupin utilized significant amounts of Ca. Thus P and Ca uptake were not driving forces for the root-induced dissolution of PR which was probably due to proton excretion that occurred concurrently, as evidenced by a decrease of rhizosphere pH of about 2 pH units. White lupin dissolved up to twice as much PR than narrow leaf lupin. This may be related to either the larger root biomass of white lupin or the particular excretion activity of its proteoid roots. Keywords: Rhizosphere; Phosphate Rock; Proton Excretion; Dissolution; Lupinus-Albus ; Lupinus-Angustifolius ; Australian Journal of Soil Research 33(3) 477 - 489 Full text doi:10.1071/SR9950477 © CSIRO 1995
language: eng
source: Alma/SFX Local Collection
identifier: ISSN: 0004-9573
fulltext: fulltext
issn:
  • 0004-9573
  • 1838-675X
  • 1446-568X
  • 1838-6768
url: Link


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descriptionDissolution of North Carolina phosphate rock (PR) in the rhizosphere of white lupin (Lupinus albus) and narrow leaf lupin (L. angustifolius) was measured in a growth chamber experiment. Plants were grown for 8-13 days in an artificial soil (pure alumina sand) at alkaline pH to eliminate dissolution of PR due to reaction with the soil. Phosphate rock was supplied as the sole source of P and Ca for the plants at two rates of application (0.1 and 1 mg P g-1 soil). Both species dissolved considerable amounts of PR (up to 70% of PR present within 3 mm from the roots). Phosphorus extracted from the soil with 0.5 M NaOH showed that up to 69% of dissolved P accumulated in the rhizosphere of both species due to sorption by the soil, particularly at the high rate of application. Only white lupin utilized significant amounts of Ca. Thus P and Ca uptake were not driving forces for the root-induced dissolution of PR which was probably due to proton excretion that occurred concurrently, as evidenced by a decrease of rhizosphere pH of about 2 pH units. White lupin dissolved up to twice as much PR than narrow leaf lupin. This may be related to either the larger root biomass of white lupin or the particular excretion activity of its proteoid roots. Keywords: Rhizosphere; Phosphate Rock; Proton Excretion; Dissolution; Lupinus-Albus ; Lupinus-Angustifolius ; Australian Journal of Soil Research 33(3) 477 - 489 Full text doi:10.1071/SR9950477 © CSIRO 1995
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subjectAgronomy. Soil science and plant productions ; Biological and medical sciences ; Fundamental and applied biological sciences. Psychology ; General agronomy. Plant production ; Life Sciences ; Nitrogen, phosphorus, potassium fertilizations ; Phosphorus fertilization ; Soil-plant relationships. Soil fertility. Fertilization. Amendments
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descriptionDissolution of North Carolina phosphate rock (PR) in the rhizosphere of white lupin (Lupinus albus) and narrow leaf lupin (L. angustifolius) was measured in a growth chamber experiment. Plants were grown for 8-13 days in an artificial soil (pure alumina sand) at alkaline pH to eliminate dissolution of PR due to reaction with the soil. Phosphate rock was supplied as the sole source of P and Ca for the plants at two rates of application (0.1 and 1 mg P g-1 soil). Both species dissolved considerable amounts of PR (up to 70% of PR present within 3 mm from the roots). Phosphorus extracted from the soil with 0.5 M NaOH showed that up to 69% of dissolved P accumulated in the rhizosphere of both species due to sorption by the soil, particularly at the high rate of application. Only white lupin utilized significant amounts of Ca. Thus P and Ca uptake were not driving forces for the root-induced dissolution of PR which was probably due to proton excretion that occurred concurrently, as evidenced by a decrease of rhizosphere pH of about 2 pH units. White lupin dissolved up to twice as much PR than narrow leaf lupin. This may be related to either the larger root biomass of white lupin or the particular excretion activity of its proteoid roots. Keywords: Rhizosphere; Phosphate Rock; Proton Excretion; Dissolution; Lupinus-Albus ; Lupinus-Angustifolius ; Australian Journal of Soil Research 33(3) 477 - 489 Full text doi:10.1071/SR9950477 © CSIRO 1995
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notesThe Australian Journal of Soil Research is an international journal of soil science publishing high quality research on: soil genesis, soil morphology and classification; soil physics and hydrology; soil chemistry and mineralogy; soil fertility and plant nutrition; soil biology and biochemistry; soil and water management and conservation; soil pollution and waste disposal
abstractDissolution of North Carolina phosphate rock (PR) in the rhizosphere of white lupin (Lupinus albus) and narrow leaf lupin (L. angustifolius) was measured in a growth chamber experiment. Plants were grown for 8-13 days in an artificial soil (pure alumina sand) at alkaline pH to eliminate dissolution of PR due to reaction with the soil. Phosphate rock was supplied as the sole source of P and Ca for the plants at two rates of application (0.1 and 1 mg P g-1 soil). Both species dissolved considerable amounts of PR (up to 70% of PR present within 3 mm from the roots). Phosphorus extracted from the soil with 0.5 M NaOH showed that up to 69% of dissolved P accumulated in the rhizosphere of both species due to sorption by the soil, particularly at the high rate of application. Only white lupin utilized significant amounts of Ca. Thus P and Ca uptake were not driving forces for the root-induced dissolution of PR which was probably due to proton excretion that occurred concurrently, as evidenced by a decrease of rhizosphere pH of about 2 pH units. White lupin dissolved up to twice as much PR than narrow leaf lupin. This may be related to either the larger root biomass of white lupin or the particular excretion activity of its proteoid roots. Keywords: Rhizosphere; Phosphate Rock; Proton Excretion; Dissolution; Lupinus-Albus ; Lupinus-Angustifolius ; Australian Journal of Soil Research 33(3) 477 - 489 Full text doi:10.1071/SR9950477 © CSIRO 1995
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pubCommonwealth Scientific and Industrial Research Organization CSIRO
doi10.1071/SR9950477
orcididhttps://orcid.org/0000-0001-5458-1259