Mechanized conservation agriculture, mainly no-till (NT) based production systems, is of utmost importance for the conservation of natural resources and restoration of the environmental quality. However, the impact of machine-induced compaction on the methane (CH₄) uptake in the absence of the growing crop is not known. Emission of CH₄ from soil to the atmosphere through anthropogenic activities plays a significant role in global climate change. Thus, a NT compaction experiment was established at the Waterman Farm of the Ohio State University, Columbus, Ohio, in 1997, to study the long-term impact of the growing season traffic on non-growing season methane emission under NT farming. The levels of traffic included: control (no passages with additional axle loads; VT-0), two (VT-2) and four (VT-4) additional passages of 2.5 Mg water wagon axle load to cover the entire plot. To study the CH₄ uptake capacity of soil under NT in relation to natural soils, three locations were also selected from the adjoining woodlot (WL). The CH₄ emissions of soil were monitored between November 16, 2016 and May 30, 2017. CH₄ emissions ranged from −8.54 to 5.06 mg m⁻² day⁻¹ with mean of −0.97, −0.45, −1.31 and −4.46 mg CH₄ m⁻² day⁻¹ for VT-0, VT-2, VT-4 and WL, respectively. The CH₄ uptake was higher in soil under WL -4.85, and −3.07 mg CH₄ m⁻² day⁻¹ during winter and spring seasons, respectively than under other treatments. The VT-2 treatment recorded the highest CH₄ emission (0.55 mg CH₄ m⁻² day⁻¹) during winter and the lowest soil CH₄ uptake (−1.19 mg CH₄ m⁻² day⁻¹) during the spring season. At end of the study, the cumulative uptake of CH₄ was reduced under VT-2 by 911% and 122% as compared to that in soil of WL (5.36 CH₄ kg ha⁻¹) and VT-0 (1.18 CH₄ kg ha⁻¹), respectively. The radiative forcing (RF) i.e. greatest net CH₄ emissions were observed under VT-4. The study concluded that long-term (>20 years) use of 2 or 4 additional passages of traffic 2.5 Mg axle load under NT farming reduced the oxidation and uptake rate of CH₄ in comparison to that of soil under NT and WL, which may consequently reduce the CH₄ mitigation potential of NT soils.

机械化的保护性农业，主要是免耕生产系统，对于保护自然资源和恢复环境质量至关重要。但是，在没有生长的农作物的情况下，机器诱导的压实对甲烷（CH ₄）吸收的影响尚不清楚。CH _4的排放通过人为活动从土壤到大气，在全球气候变化中发挥着重要作用。因此，1997年在俄亥俄州哥伦布市的俄亥俄州立大学沃特曼农场建立了NT压实试验，以研究NT耕作下生长季交通量对非生长季甲烷排放的长期影响。交通级别包括：控制（无通道，无附加轴负载； VT-0），另外有两个（VT-2）和四（VT-4）通道，分别具有2.5 Mg的水车轴负载，可覆盖整个地块。为了研究NT下土壤相对于天然土壤对CH _4的吸收能力，还从毗邻的林地（WL）中选择了三个位置。在2016年11月16日至2017年5月30日期间，监测了土壤中CH _4的排放。CHVT-0，VT-2，VT-4的_4种排放量范围从-8.54至5.06 mg m ^-2天^-1，平均值为-0.97，-0.45，-1.31和-4.46 mg CH ₄ m ^-2天^-1和WL分别。与其他处理相比，在WL -4.85和−3.07 mg CH ₄ m ^-2第一天^-1的冬季和春季，土壤中CH _4的吸收较高。VT-2处理在冬季记录了最高的CH ₄排放（0.55 mg CH ₄ m ^-2天^-1），最低的土壤CH ₄吸收量（-1.19 mg CH ₄ m）春季期间⁻²天^-1）。在研究结束时，与WL（5.36 CH ₄ kg ha ^-1）和VT-0（1.18 CH ₄ kg ）的土壤相比，VT-2下CH ₄的累积吸收减少了911％和122％。ha ^-1）。在VT-4下观察到了辐射强迫（RF），即最大的CH ₄净排放量。研究得出的结论是，相比于NT和WL下的土壤，长期（> 20年）在NT耕作下长期使用2或4条额外的2.5 Mg轴负荷交通通道可降低CH ₄的氧化和吸收速率，这可能因此降低了NT土壤的CH ₄缓解潜力。