MEASURMENT OF EFFECT LEVELS ON UREASE ENZYME ACTIVITY IN SOILS UNDER DIFFERENT INCUBATION TIMES
Mesopotamia Journal of Agriculture,
2018, Volume 46, Issue 4, Pages 333-340
AbstractA 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.
- Article View: 71
- PDF Download: 215