INFLUENCE OF UREA FERTILIZER ON SOME SOl MICROBIOLOGICAL AND BIOCHEMICAL PARAMETERS | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 3, Volume 28, Issue 8, August 2003, Page 6453-6463 PDF (7.41 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2003.245096 | ||||
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| Authors | ||||
| A. Subhani,1; A. Javaid2; A. M. EI-ghamry3; C. Huang4 | ||||
| 1Baranl Agrlc. Res. Inst. (BARI), Talagang Road, Chakwal, Pakistan | ||||
| 2Soli and Water Conservation Res.lnst. (SAWCRI), Chakwal, Pakistan | ||||
| 3Mansoura Unlv., Fac. of Agrlc., Soli Dept., Egypt. | ||||
| 4ZheJiang Unlv., College of Envlro. and Resources Sci., China. | ||||
| Abstract | ||||
| A laboratory incubation study was conducted to estimate the influence of fertilizer (urea) on a paddy field so;1 health under controlled moisture (flooded soil) afJd temperature (25 0c) conditions. The fertilizer was applied @ 0, 25, 50, 100, 200, and 4QO 1-19 N s" soil. The fertilizer concentrations ranging from 0 to 100).lg N s' soil showdd positive response on ETS activity. However, at concentrations of 200 and 4001-19 N 9 I, the activity was reduced Significantly. The higher rates of fertilizer caused an improveme t in the soil phenol contents and it increased with increasing concentration of fertilizer. T/je fertilizer incorporation didn't produce any significant change in soil protein content while the response of biomass phospholipid content was nearly similar to ETS activity; il increased with lower rates of N-fertilizer but decreased at higher rates. | ||||
| Keywords | ||||
| Urea; ETS act.ivity. phenol; protein; phospholipids; paddy soil | ||||
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