Herbage production, nitrogen fixation and water use efficiency of ten annual pasture legumes grown with and without lime on an acid soil

Belinda Hackney, Brian Dear, Mark Peoples, Gabrielle Dyce, Craig Rodham

Research output: Book chapter/Published conference paperConference paper

Abstract

Herbage yield and nitrogen (N) fixation of ten temperate annual legumes, was measured when grown with and without lime on an acid soil. N-fixation of O. compressus and O. sativus was significantly lower on limed and unlimed treatments (average 3.4 kg N/tDM) compared to T. subterraneum (average of 18 kg N/tDM). T. michelanium, T. purpureum and T. vesiculosum fixed a similar amount of N to T. subterraneum in unlimed treatments but T. vesiculosum fixed significantly more N (28 kg N/t DM) than all other legumes in limed soils. Herbage production of T. purpureum and T. vesiculosum was very high, particularly in limed treatments (>9.5t/ha) and consequently the total quantity of N fixed was significantly higher (>220 kgN/ha) than for all other species (20-131 kgN/ha) except T. michelanium. Water use efficiency (WUE) of the two highest N-fixing legumes was amongst the highest of all species. The results indicate some new annual pasture legumes can fix large quantities of N and use growing season rainfall more efficiently than T. subterraneum, particularly where lime has been used to amend soil acidity.
Original languageEnglish
Title of host publication14th AAC
Subtitle of host publicationGlobal issues. Paddock action
Place of PublicationAdelaide
PublisherThe Regional Institute
Pages1-4
Number of pages4
Publication statusPublished - 2008
Event14th Australian Agronomy Conference - Adelaide, Australia
Duration: 21 Sep 200825 Sep 2008

Conference

Conference14th Australian Agronomy Conference
CountryAustralia
Period21/09/0825/09/08

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  • Cite this

    Hackney, B., Dear, B., Peoples, M., Dyce, G., & Rodham, C. (2008). Herbage production, nitrogen fixation and water use efficiency of ten annual pasture legumes grown with and without lime on an acid soil. In 14th AAC: Global issues. Paddock action (pp. 1-4). The Regional Institute.