THE EFFECT OF NITRIFICATION INHIBITOR (AM) ON GROWTH AND NITROGEN UPTAKE BY COTTON PLANT AND NITROGEN EFFICIENCY RATIO OF THE ADDED FERTILIZER. | ||||
| Journal of Soil Sciences and Agricultural Engineering | ||||
| Article 4, Volume 28, Issue 1, January 2003, Page 641-648 PDF (2.09 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jssae.2003.243973 | ||||
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| Author | ||||
| H. E. A. Madkour, | ||||
| Soil, Water and Environ. Res. Inst., Agric. Res. Center,Giza, Misr (Egypt) | ||||
| Abstract | ||||
| To study the effect of the compound AM (2 amino-4 chloro-6-methyl pyrimidine) as an inhibitor of the nitrification process, a pot experiment was conducted in a greenhouse using a clay loam collected from Agric. Res. Center Farm at Giza. The added AM levels were 3, 6, 9 and 12% of fertilizer added to the soil as ammonium sulfate or urea. Cotton plants c.v.Giza79 up to 120 day age was used a test plants. The obtained data could be summarized in the followings:- Addition of AM in rates of 9 or 12% of the added fertilizer resulted in depression of plant growth and uptake. It may be due to an inhibition effect of nitrifying bacteria and also due to an adverse effect on root system. The level of 3% was found to be best treatment followed by 6% where nitrogen efficiency ratio (NER) increased by either ammonium sulfate or urea especially with 3% level of AM application. Nitrification rate increased by time in the most treatments as affected with AM limitation of nitrogen release from the both used fertilizers. Generally, it could be recommended with application of AM in a rate corresponding of 3% of added ammonical or amide fertilizers to control the release of their nitrogen and thus increased NER. | ||||
| Keywords | ||||
| Clay loam soil; Inhibitor AM; Ammonium sulfat; Urea; Cotton | ||||
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