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MEASURMENT OF EFFECT LEVELS ON UREASE ENZYME ACTIVITY IN SOILS UNDER DIFFERENT INCUBATION TIMES | ||
| Mesopotamia Journal of Agriculture | ||
| Article 29, Volume 46, Issue 4, 2018, Pages 333-340 PDF (420.15 K) | ||
| Document Type: Research | ||
| DOI: 10.33899/magrj.2018.161556 | ||
| Authors | ||
| Alyaa Abdulateef Jassim AL- Atrkgee; Mazin Faisal Said | ||
| College of Agriculture and Forestry\ University of Mosul | ||
| Abstract | ||
| A factorial experiment was conducted in laboratory using complete randomize design (CRD) to study the effect of urea fertilizer levels on urease enzyme activity and available nitrogen in Bashika and Al-hawi soils under different incubation times. Results showed a significant increases in enzyme activity in Bashika soil as compared with Al-hawi soil of 25.93%. 100kgN.h-1 gave a significant increasing in enzyme activity as compared with 200 kgN.h-1 of 15%. Enzymes activity was increased with increasing incubation time till to 30 days, then after a significant depression in enzyme activity was noticed. Bashika soil gave a significant increases in available nitrogen as compared with Al-hawi soil of 23.55%. 200 kgN.h-1 gave a significant increases in available nitrogen as compared with 100 kgN.h-1 of 27.48%. Available nitrogen was increased with increasing incubation time till 45 days, which gave 53.34 ppm. However a significant decreases was noticed at 60 days of incubation. | ||
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