Abandoned pasture legumes offer potential economic and environmental benefits in semiarid clay soil rangelands

Gardiner, C.P., and Swan, S. J. (2008) Abandoned pasture legumes offer potential economic and environmental benefits in semiarid clay soil rangelands. In: Australian Rangeland Conference. From: A climate of change in the rangelands, 28 September - 2 October 2008, Charters Towers, QLD, Australia.

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Abstract

In the 1980’s CSIRO and QDPI established a number of pasture legume evaluation trials throughout clay soil regions in Queensland’s semiarid tropical rangelands. These sites have long since been abandoned and incorporated into regularly grazed paddocks. Grass quality is often poor in semiarid rangelands; any surviving legumes from these trials would potentially enhance pasture quality, and thus livestock production in a region where suitable sown legume species are virtually unknown. Legumes also have the potential of enteric methane abatement, reducing greenhouse gas emissions from ruminant livestock. Graziers are however unlikely to use legumes solely for the environmental benefits of CH4 mitigation unless there are positive economic impacts on livestock production. Re-examination of a number of abandoned legume trial sites in rangelands on clay soils show that accessions of Desmanthus are often the only survivors. Desmanthus genotypes offer exciting new prospects and choices for graziers, with associated potential economic and environmental benefits. This paper focuses on the results of surveys at “Hillgrove Station” Charters Towers where Desmanthus was found to be persisting some 25 years after the original trial was sown.

Item ID: 8273
Item Type: Conference Item (Poster)
Keywords: legumes, semiarid, rangelands, Desmanthus, clay soils
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Date Deposited: 01 Mar 2010 05:26
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0703 Crop and Pasture Production > 070305 Crop and Pasture Improvement (Selection and Breeding) @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8304 Pasture, Browse and Fodder Crops > 830406 Sown Pastures (excl. Lucerne) @ 100%
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