Applied and Environmental Soil Science / 2011 / Article / Tab 3

Research Article

Tillage and Fertilizer Management Effects on Soil-Atmospheric Exchanges of Methane and Nitrous Oxide in a Corn Production System

Table 3

Soil methane fluxes as influenced by tillage systems and ammonium nitrate (AN) and poultry litter (PL) N fertilizers using surface (SA), soil incorporation (SI), and subsurface band (BA) application methods in spring, summer, fall, and winter seasons, Hazel Green, Alabama.

SpringSummerFallWinterMean flux
CH4 flux (g ha−1 day−1)

Tillage systems
 Conventional tillage−2.05a−1.96ab−0.68a3.32b−0.34
 Grass fallow−1.79a−0.26b2.38b−21.44a−5.28
Fertilizer treatments
 0N control−5.97a−1.37b0.60b22.15d3.85
 150 kg N ha−1 AN-SA−5.48a−0.44c−0.87b32.16e6.34
 150 kg N ha−1 AN-SI3.49bc−5.74a−1.21b4.65c0.29
 150 kg N ha−1 PL-SA4.16c−0.30c−1.09b−13.12b−2.58
 150 kg N ha−1 PL-SI0.32b−2.96b1.62b−13.95b−3.74
 150 kg N ha−1 PL-BA−5.25a−5.41a−4.77a−18.00a−8.36

Seasonal means−1.74−2.22−0.52−1.16

Means for tillage system or N fertilizer treatment within a season followed by the same letter are not significantly different at the level.

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