Effect of Incorporation of Hairy Vetch on Nitrous Oxide Emission from Soils Cultivated with Maize

Abstract

BACKGROUND: Impact of incorporating hairy vetch into soil on mitigating nitrous oxide (N 2 O) emissions from maize field in South Korea has not been investigated, whereas impacts on soil properties and nutrients for crops have been investigated. Therefore, this study was conducted to examine N 2 O emission from upland soil incorporated with hairy vetch for one year in maize field. METHODS AND RESULTS: Hairy vetch was grown in an upland soil from November, 2017 to May, 2018 and incorporated into soil on May 25 of 2018. Control and conventional treatment (NPK) were included for comparison. Gas samples were collected weekly for a year to examine N 2 O emissions from the soil. Chemical nitrogen (N) fertilizer stimulated N 2 O emission in short term resulting in the greatest cumulative N 2 O emission in NPK (6.72 kg N 2 O ha -1 ) compared to the control (4.04 kg N 2 O ha -1 ) and hairy vetch-incorporated field (5.43 kg N 2 O ha -1 ), and the greatest yield of maize from NPK, because total N input was much greater by NPK (186 N kg ha -1 ) than by hairy vetch (81.6 N kg ha -1 ). CONCLUSION: Incorporation of hairy vetch reduced N 2 O emissions from the maize compared to the NPK-treated field. However, further research on improving crop productivity with incorporation of hairy vetch is needed.

The use of double-cropping in combination with no-tillage and optimized nitrogen fertilization reduces soil N2O emissions under irrigation

“…Since MC was the system in which the greatest quantities of mineral fertilizer were applied, this was the system with the highest cumulative N 2 O emissions. Corresponding results have been obtained in similar studies in which partially or totally substituting mineral fertilization with the incorporation of legume residues resulted in decreases of around 10-20 % in cumulative soil N 2 O emissions without affecting the main crop yield (Guardia et al, 2016a;Han et al, 2019). The effects of the legumes on cumulative soil N 2 O emissions were similar in all three years, therefore the type of legume crop and its use were not driving factors for the differences between the cropping systems.…”

Impacts of Different Nitrogen Fertilization on Greenhouse Gas Emissions and Lettuce Productivity in Upland Soils during Cultivation

“…Kim et al, 2014a;Kim et al, 2018b). 실제 토양 공극 내 수분이 차지하는 비율 (water filled pore space; WFPS)이 증가함에 따라 아산화질소의 배출량이 증가한다고 알려져 있다 (Kim et al, 2010;Han et al, 2019) )에 비해 요소 처리구 (1.49 g m -2…”