Effects of Irrigation Water Quality on the Recovery of 15N-Fertilizer by Sorghum in Field Study
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Keywords

15N fertilizer, sorghum, irrigation

How to Cite

Khelil, M. N. ., Destain , J. P. ., Rejeb , S. ., & Henchi, B. . (2011). Effects of Irrigation Water Quality on the Recovery of 15N-Fertilizer by Sorghum in Field Study. Asian Journal of Agriculture and Rural Development, 1(2), 90–97. Retrieved from https://archive.aessweb.com/index.php/5005/article/view/489

Abstract

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 (well water “WW” and treated wastewater “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.

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