Nitrous Oxide Emission from No‐Till Irrigated Corn

• DOI: 10.2136/sssaj2004.0292
• Publication Date: 2005-05-06T20:07:53Z
• Authors: Daniel Ginting; Bahman Eghball
• Keywords: Nitrous oxide; Growing season

Field experiments were conducted to determine optimal time during the day for N 2 O flux determination and evaluate effects of wheel traffic soil parameters on fluxes following urea ammonium nitrate (UAN) injection summer UAN fertigations. The located silty clay loam soils under no‐till irrigated continuous corn eastern Nebraska. Three approaches used. First, near‐continuous measurements made in non‐wheel‐tracked (NWT) interrows four 24‐h periods growing season 2002. Second, point wheel‐tracked (WT) NWT at five dates Third, (nitrate, ammonium, moisture, temperature) from 2001 2004. differences between vs. (<8 g O‐N ha −1 d ) WT (<3.7 not significant. means daily within 60 after (period high N) first, second, third year 26.8, 21.2, 28.0 , respectively. low 9.24, 4.05, 7.50 Summer fertigations did increase flux. Under conditions this study, measurement can be any interrows. Among parameters, dynamics zone correlates best with fluxes.