caa a22 4500 445837764 CHVBK 20180317145335.0 cr unu---uuuuu 170323e20110501xx s 000 0 eng 10.1007/s00271-010-0229-1 doi (NATIONALLICENCE)springer-10.1007/s00271-010-0229-1 Differences in water-use efficiency among perennial forages used by the dairy industry under optimum and deficit irrigation [Elektronische Daten] [J. Neal, W. Fulkerson, B. Sutton] The cost and scarcity of water is placing increasing pressure on Australian dairy farmers to utilise water for forage production as efficiently as possible. This study aimed to identify perennial forage species with greater water-use efficiency (WUE) than the current dominant species, perennial ryegrass (Lolium perenne L.). Fifteen perennial forage species were investigated under optimum irrigation and two deficit irrigation treatments, over three years at Camden, NSW, on a brown Dermsol in a warm temperate climate. Under optimal irrigation, there was a nearly twofold difference in mean WUEt (total yield/evapotranspiration) between forages, with kikuyu (Pennisetum clandestinum Hochst. ex. chiov.) having the highest (27.3kgha−1mm−1) and birdsfoot trefoil (Lotus corniculatus L.) the lowest (14.8kgha−1mm−1). Kikuyu was also the most water use efficient forage under the extreme deficit irrigation treatment, although its mean WUEt declined by 15% to 23.2kgha−1mm−1, while white clover (Trifolium repens L.) in the same treatment had the largest decline of 44% and the lowest WUEt of only 8.8kgha−1mm−1. In order to maximise WUE for any forage, it is necessary to maximise yield, as there is a strong positive relationship between yield and WUEt. Springer-Verlag, 2010 Neal J. Industry and Investment NSW, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, 2570, Menangle, New South Wales, Australia aut Fulkerson W. Faculty of Veterinary Science, The University of Sydney, MC Franklin Lab, 2570, Camden, New South Wales, Australia aut Sutton B. Faculty of Agriculture, The University of Sydney, Food and Natural Resources, 2006, Sydney, New South Wales, Australia aut Irrigation Science Springer-Verlag 29/3(2011-05-01), 213-232 0342-7188 29:3<213 2011 29 271 https://doi.org/10.1007/s00271-010-0229-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00271-010-0229-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Neal J. Industry and Investment NSW, Elizabeth Macarthur Agricultural Institute, Woodbridge Rd, 2570, Menangle, New South Wales, Australia aut NATIONALLICENCE 700 1- Fulkerson W. Faculty of Veterinary Science, The University of Sydney, MC Franklin Lab, 2570, Camden, New South Wales, Australia aut NATIONALLICENCE 700 1- Sutton B. Faculty of Agriculture, The University of Sydney, Food and Natural Resources, 2006, Sydney, New South Wales, Australia aut NATIONALLICENCE 773 0- Irrigation Science Springer-Verlag 29/3(2011-05-01), 213-232 0342-7188 29:3<213 2011 29 271 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer