Soil Greenhouse Gas Emissions from Three Decades Long-term Experimental Field of Corn-Soybean Rotation and Tillage Treatments

Abstract

Reduction of greenhouse gas (GHG) emissions from upland crop field as well as paddy field is being required, but little information on GHG emissions according to cultivation practices in upland field is available. Soil GHG emissions during the growing season were investigated in the field of three decades rotation and tillage treatments which were consisted of plow, chiesl tillage and no tillage in west central Indiana, USA in 2006. Seasonal cumulative CO 2 emissions were not different among treatments. CH 4 emission increased a little in plow tillage during early soybean growing season. Most of N2O emission occurred during early corn growing season after N-fertilizer application from mid June to mid July, and was significantly affected by tillage practices in which seasonal cumulative N2O emission was significantly higher under chisel tillage. N 2 O emission under no-tillage was lower about 64% and 39% than that under chisel tillage and plow tillage, respectively. No-tillage practice with rotation of corn and soybean seems to be promising in point of less GHG emission and less labor for cultivation without grain yield reduction.

Effect of No‐Till Practice on Runoff and Nonpoint Source Pollution from an Intensively Farmed Field in Korea

“…But the focus of these studies has been about crop growth and productivity; the environmental aspects of different management practices have not been well explored as yet. Studies related to source control for the development of BMPs have been reported by a few researchers (Choi et al , , ; Shin et al , , ; Won et al , ; Seo et al , ). These studies mostly focused on the effect of rice straw surface cover, PAM, and gypsum (and their combination) on soil erosion, runoff and NPS pollution from sloping fields.…”