caa a22 4500 463208676 CHVBK 20180405153133.0 cr unu---uuuuu 170326e20070101xx s 000 0 eng 10.1007/s10705-006-9046-6 doi (NATIONALLICENCE)springer-10.1007/s10705-006-9046-6 The effect of fertiliser and grazing on nitrogen export in surface runoff from rain-fed and irrigated pastures in south-eastern Australia [Elektronische Daten] [Kirsten Barlow, David Nash, Murray Hannah, Fiona Robertson] Nutrients, including nitrogen (N), exported from agricultural systems contribute to eutrophication and the development of algal blooms. Understanding the relative effect of farm management on nutrient export will indicate the extent to which farmers can potentially mitigate this process. Six years of monitoring surface runoff from rain-fed and irrigated dairy pastures was carried out in south-eastern Australia. Over the monitoring period, the flow-weighted mean annual total N (TN) concentrations in runoff varied between 8.2 and 29mg/l for rain-fed pasture and 8.7 and 58mg/l for irrigated pasture. An additive component model describing N concentrations separated the management (grazing and fertiliser) and year effects from other processes. The model accounted for 40 and 47% of the variation in N concentrations for the rain-fed and irrigated pastures, respectively. While fertiliser application, grazing and year had a significant effect on concentrations, other variables that are not necessarily under management control significantly affected N export. With current knowledge, improved management of pasture-based systems such as improved timing of fertiliser application and grazing relative to runoff may only result in a small decrease in N export. The remainder of the variability was attributed to environmentally mediated changes of N concentrations in runoff water. The collection of more detailed information on environmental parameters including soil moisture and soil temperature is proposed, to enable a better prediction of N concentrations and therefore improved understanding of potential management strategies. Springer Science+Business Media B.V., 2006 Overland flow nationallicence Transport nationallicence Nitrogen cycling nationallicence Urea nationallicence Barlow Kirsten Department of Primary Industries Rutherglen, Primary Industries Research Victoria (PIRVic), RMB 1145 Chiltern Valley Road, 3685, Rutherglen, Vic, Australia aut Nash David Department of Primary Industries Ellinbank, PIRVic, RMB 2460 Hazeldean Road, 3821, Ellinbank, Vic, Australia aut Hannah Murray Department of Primary Industries Ellinbank, PIRVic, RMB 2460 Hazeldean Road, 3821, Ellinbank, Vic, Australia aut Robertson Fiona Department of Primary Industries Hamilton, PIRVic, Private Bag 105, 3300, Hamilton, Vic, Australia aut Nutrient Cycling in Agroecosystems Springer Netherlands 77/1(2007-01-01), 69-82 1385-1314 77:1<69 2007 77 10705 https://doi.org/10.1007/s10705-006-9046-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10705-006-9046-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Barlow Kirsten Department of Primary Industries Rutherglen, Primary Industries Research Victoria (PIRVic), RMB 1145 Chiltern Valley Road, 3685, Rutherglen, Vic, Australia aut NATIONALLICENCE 700 1- Nash David Department of Primary Industries Ellinbank, PIRVic, RMB 2460 Hazeldean Road, 3821, Ellinbank, Vic, Australia aut NATIONALLICENCE 700 1- Hannah Murray Department of Primary Industries Ellinbank, PIRVic, RMB 2460 Hazeldean Road, 3821, Ellinbank, Vic, Australia aut NATIONALLICENCE 700 1- Robertson Fiona Department of Primary Industries Hamilton, PIRVic, Private Bag 105, 3300, Hamilton, Vic, Australia aut NATIONALLICENCE 773 0- Nutrient Cycling in Agroecosystems Springer Netherlands 77/1(2007-01-01), 69-82 1385-1314 77:1<69 2007 77 10705 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer