Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum

Brian Dear; Mark Peoples; Richard Hayes; Anthony Swan; Steve Morris

Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum

Brian Dear, Mark Peoples, Richard Hayes, Anthony Swan, Steve Morris

Science and Health

Research output: Book chapter/Published conference paper › Conference paper › peer-review

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Abstract

The amount of symbiotic dinitrogen (N2) fixed by an annual legume pasture (subterranean clover + balansa clover) and a lucerne-annual legume pasture growing on vertosol soils was estimated at two sites (Grogan and Morangarell) over 3 years in southern NSW following treatment with 3 rates of gypsum. Based on shoot growth only, the annual legume pasture was estimated to fix between 91 and 146 kg N2/ha/yr at Grogan and 86-214 kgN2/ha/yr at the less sodic Morangarell site. When roots were also included these values increased to 156-254 kg N2/ha at Grogan and 148-370 kg N2/ha/yr at Morangarell. Estimates of N2 fixed by the lucerne-annual legume mixed sward at Grogan were similar to the annual legume sward, but at Morangarell estimates of N2 fixed by lucerne were both higher and lower depending on seasonal conditions. Gypsum increased estimated total N2 fixed by the annual and lucerne pastures by up to 16% and 37% respectively at Grogan, but had no effect at Morangarell.

Original language	English
Title of host publication	15th AAC
Subtitle of host publication	Food security from sustainable agriculture
Editors	H. Dove, R. Culvenor
Place of Publication	Australia
Publisher	The Regional Institute
Pages	1-4
Number of pages	4
Publication status	Published - 2010
Event	15th Australian Agronomy Conference - Lincoln, New Zealand, New Zealand Duration: 15 Nov 2010 → 18 Nov 2010

Conference

Conference	15th Australian Agronomy Conference
Country/Territory	New Zealand
Period	15/11/10 → 18/11/10

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title = "Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum",

abstract = "The amount of symbiotic dinitrogen (N2) fixed by an annual legume pasture (subterranean clover + balansa clover) and a lucerne-annual legume pasture growing on vertosol soils was estimated at two sites (Grogan and Morangarell) over 3 years in southern NSW following treatment with 3 rates of gypsum. Based on shoot growth only, the annual legume pasture was estimated to fix between 91 and 146 kg N2/ha/yr at Grogan and 86-214 kgN2/ha/yr at the less sodic Morangarell site. When roots were also included these values increased to 156-254 kg N2/ha at Grogan and 148-370 kg N2/ha/yr at Morangarell. Estimates of N2 fixed by the lucerne-annual legume mixed sward at Grogan were similar to the annual legume sward, but at Morangarell estimates of N2 fixed by lucerne were both higher and lower depending on seasonal conditions. Gypsum increased estimated total N2 fixed by the annual and lucerne pastures by up to 16% and 37% respectively at Grogan, but had no effect at Morangarell.",

keywords = "Open access version available",

author = "Brian Dear and Mark Peoples and Richard Hayes and Anthony Swan and Steve Morris",

note = "Imported on 03 May 2017 - DigiTool details were: publisher = Australia: The Regional Institute, 2010. editor/s (773b) = H Dove and R Culvenor; Event dates (773o) = 15-18th November 2010; Parent title (773t) = Australian Agronomy Conference.; 15th Australian Agronomy Conference ; Conference date: 15-11-2010 Through 18-11-2010",

year = "2010",

language = "English",

pages = "1--4",

editor = "H. Dove and R. Culvenor",

booktitle = "15th AAC",

publisher = "The Regional Institute",

}

Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum. / Dear, Brian; Peoples, Mark; Hayes, Richard et al.
15th AAC: Food security from sustainable agriculture. ed. / H. Dove; R. Culvenor. Australia: The Regional Institute, 2010. p. 1-4.

Research output: Book chapter/Published conference paper › Conference paper › peer-review

TY - GEN

T1 - Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum

AU - Dear, Brian

AU - Peoples, Mark

AU - Hayes, Richard

AU - Swan, Anthony

AU - Morris, Steve

N1 - Imported on 03 May 2017 - DigiTool details were: publisher = Australia: The Regional Institute, 2010. editor/s (773b) = H Dove and R Culvenor; Event dates (773o) = 15-18th November 2010; Parent title (773t) = Australian Agronomy Conference.

PY - 2010

Y1 - 2010

N2 - The amount of symbiotic dinitrogen (N2) fixed by an annual legume pasture (subterranean clover + balansa clover) and a lucerne-annual legume pasture growing on vertosol soils was estimated at two sites (Grogan and Morangarell) over 3 years in southern NSW following treatment with 3 rates of gypsum. Based on shoot growth only, the annual legume pasture was estimated to fix between 91 and 146 kg N2/ha/yr at Grogan and 86-214 kgN2/ha/yr at the less sodic Morangarell site. When roots were also included these values increased to 156-254 kg N2/ha at Grogan and 148-370 kg N2/ha/yr at Morangarell. Estimates of N2 fixed by the lucerne-annual legume mixed sward at Grogan were similar to the annual legume sward, but at Morangarell estimates of N2 fixed by lucerne were both higher and lower depending on seasonal conditions. Gypsum increased estimated total N2 fixed by the annual and lucerne pastures by up to 16% and 37% respectively at Grogan, but had no effect at Morangarell.

AB - The amount of symbiotic dinitrogen (N2) fixed by an annual legume pasture (subterranean clover + balansa clover) and a lucerne-annual legume pasture growing on vertosol soils was estimated at two sites (Grogan and Morangarell) over 3 years in southern NSW following treatment with 3 rates of gypsum. Based on shoot growth only, the annual legume pasture was estimated to fix between 91 and 146 kg N2/ha/yr at Grogan and 86-214 kgN2/ha/yr at the less sodic Morangarell site. When roots were also included these values increased to 156-254 kg N2/ha at Grogan and 148-370 kg N2/ha/yr at Morangarell. Estimates of N2 fixed by the lucerne-annual legume mixed sward at Grogan were similar to the annual legume sward, but at Morangarell estimates of N2 fixed by lucerne were both higher and lower depending on seasonal conditions. Gypsum increased estimated total N2 fixed by the annual and lucerne pastures by up to 16% and 37% respectively at Grogan, but had no effect at Morangarell.

KW - Open access version available

M3 - Conference paper

SP - 1

EP - 4

BT - 15th AAC

A2 - Dove, H.

A2 - Culvenor, R.

PB - The Regional Institute

CY - Australia

T2 - 15th Australian Agronomy Conference

Y2 - 15 November 2010 through 18 November 2010

ER -

Estimated symbiotic N2 fixation by annual legume and lucerne pastures on 2 Vertosols with and without applied gypsum

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