Acta Facultatis Ecologiae - Technická univerzita vo Zvolene

104the concentrations ranged from 0.03 (September)to 0.29 mg.l –1 (March) and the average value was0.09 mg.l –1 . Its average value per two experimentalyears represented 0.08 mg.l –1 (Fig. 5, 6). It followsthat there was no seasonal regularity of N-NO 2–concentrations.0,10mg.dm -30,350,300,250,200,150,100,050,001 2 3 4 5 6 7 8 9 10 11 12monthsmg.dm -30,080,060,040,020,002005 2006 Average 2005-2006YearsFig. 5 The average concentrations of N-NO 2–(mg.l –1 )in atmospheric precipitations in 2005–2006year 2005 year 2006 AverageFig. 6 The average concentrations of N-NO 2–(mg.l –1 )in atmospheric precipitations in each monthover the years 2005–2006Inputs of nitrite nitrogen by precipitationsinto the soil fluctuated from 0.004 (October) to0.07 kg.ha –1 (November) in the first monitoredTab. 1 Inputs of N-NO 3–, N-NH 4+and N-NO 2–(kg.ha –1 ) into the soil by precipitations 2005–2006Year 2005Months Precipitations–N-NO 3+N-NH 4–N-NO 2+ –N-NO 3–+ N-NH 4+ N-NO 2January 36.4 1.28 0.21 0.03 1.52February 58.3 1.57 0.28 0.02 1.87March 3.4 0.08 0.07 0.01 0.16April 78.7 2.02 0.89 0.02 2.93May 60.9 1.86 0.73 0.02 2.61June 31.5 0.75 0.20 0.01 0.96July 59.0 1.06 1.48 0.04 2.58August 94.5 1.80 1.03 0.06 2.89September 47.1 1.22 1.08 0.03 2.33October 12.1 0.36 0.30 0.004 0.66November 43.1 1.38 0.40 0.07 1.85December 113.2 3.71 0.80 0.04 4.55Σ 638.2 17.09 7.47 0.35 24.91Year 2006Months Precipitations–N-NO 3+N-NH 4–N-NO 2+ –N-NO 3–+ N-NH 4+ N-NO 2January 57.4 1.23 0.24 0.05 1.52February 39.0 1.54 0.41 0.02 1.97March 35.2 0.89 0.46 0.10 1.45April 48.1 1.73 1.36 0.09 3.18May 95.6 2.37 0.22 0.12 2.71June 63.9 1.66 0.18 0.03 1.87July 23.7 0.46 0.11 0.01 0.58August 84.0 1.38 1.55 0.06 2.99September 12.7 0.17 0.05 0.004 0.22October 15.3 0.34 0.09 0.006 0.44November 24.4 0.68 0.16 0.02 0.86December 7.8 0.25 0.05 0.008 0.31Σ 507.10 12.70 4.88 0.52 18.10