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 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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Journal Article
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ISSN(P): 2304-1455 (Other)
ISSN(E): 2224-4433 (Other)
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Asian Journal of Agriculture and Rural Development, Volume 01, Number 04
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 Record created 2017-04-01, last modified 2018-01-22

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