Effects of irrigation water quality on the recovery of 15N-fertilizer by Sorghum in field study
15N-labeled fertilizer was applied to Sorghum at different rates (0, 100 kg N.ha-1) to 1m² microplots and with two kind of water (wel water “WW” and treated waste water “TWW”) to Sorghum grown in field during 1997 and 1999.Increases in DM production, N uptake and 15NRF were observed with TWW.About 17% and 36% of the 15N-fertilizer were recovered in the crop with TWW in 1997 and 1999, respectively. Residual effect was higher in TWW(3% vs 5%). Water irrigation quality had no effect on the 15N-labeled fertilizer remaining in the 0-60 cm layer at final harvest. For both water qualities, the major fraction of the residual 15N-fertilizer (about 60%) was recorded in the surface layer. Losses of 15N-labaled fertilizer was unaffected by water irrigation quality being approximately 35% of the applied 15N-fertilizer. TWW irrigation can efficiently substitute WW for irrigation of Sorghum and,simultaneously save nitrogen fertilizer.
Volume (Year): 1 (2011)
Issue (Month): 2 (December)
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- da Fonseca, Adriel Ferreira & Melfi, Adolpho Jose & Monteiro, Francisco Antonio & Montes, Celia Regina & Almeida, Vagner Vidal de & Herpin, Uwe, 2007. "Treated sewage effluent as a source of water and nitrogen for Tifton 85 bermudagrass," Agricultural Water Management, Elsevier, vol. 87(3), pages 328-336, February.
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