Abstract
There is currently a growing coal seam gas (CSG) industry in Queensland, Australia. The industry requires beneficialuse strategies to consume the significant volumes of water released during CSG extraction. Irrigation of tropical and subtropical forage species for beef production is one option; however, quality of coal seam (CS) water varies due to moderate–high salinity and alkalinity. The application of chemically amended CS water over time could potentially increase soil salinity, which is known to reduce plant biomass production (Shabala and Munns 2012). While the salinity tolerance of many tropical and subtropical forage species has been investigated over the last 30 years (Russell 1976; Keating et al. 1986; Kitamura 1986; Hansen and Munns 1988; Deifel et al. 2006), there is a need to examine the tolerance of more recently released species and cultivars, which are suitable for planting in the Queensland CSG area.
Highlights
There is currently a growing coal seam gas (CSG) industry in Queensland, Australia
The relationship between salinity and dry matter (DM) yield was nonlinear for all species as observed by Steppuhn et al (2005) and Kopittke et al (2009)
EC75 and EC50 thresholds were calculated (Table 2) for each species to demonstrate the salinity level that reduced growth by 25% and 50%, respectively, relative to the control
Summary
There is currently a growing coal seam gas (CSG) industry in Queensland, Australia. Irrigation of tropical and subtropical forage species for beef production is one option; quality of coal seam (CS) water varies due to moderate–high salinity and alkalinity. The application of chemically amended CS water over time could potentially increase soil salinity, which is known to reduce plant biomass production (Shabala and Munns 2012). While the salinity tolerance of many tropical and subtropical forage species has been investigated over the last 30 years (Russell 1976; Keating et al 1986; Kitamura 1986; Hansen and Munns 1988; Deifel et al 2006), there is a need to examine the tolerance of more recently released species and cultivars, which are suitable for planting in the Queensland CSG area
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