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.
|Title of host publication||14th AAC|
|Subtitle of host publication||Global issues. Paddock action|
|Place of Publication||Adelaide|
|Publisher||The Regional Institute|
|Number of pages||4|
|Publication status||Published - 2008|
|Event||14th Australian Agronomy Conference - Adelaide, Australia|
Duration: 21 Sep 2008 → 25 Sep 2008
|Conference||14th Australian Agronomy Conference|
|Period||21/09/08 → 25/09/08|
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.