Effects of different no-tillage modes on soil CO2 fluxes from paddy fields in central China
Differences in soil CO2 emissions between no-tillage (NT) and conventional intensive tillage have been well assessed in paddy fields, but few studies evaluate the effects of different NT modes on soil CO2 emissions. Therefore, a field experiment was conducted to assess paddy soil CO2 flux as affected by different NT modes ENT#091;ridge cultivation with NT (RNT) and conventional flat cultivation with NT (FNT)ENT#093; and its influencing factors during the 2012-2014 rice growing seasons in central China. Soil CO2 fluxes were determined by a LI-8100A soil CO2 flux system. The mean soil CO2 fluxes on the ridges in the RNT treatment increased by 49%, 52% and 35% compared with those on the flat land in the FNT treatment in 2012, 2013 and 2014, respectively. Cumulative CO2 its emissions ranged from 1042 g m-2 to 1489 g m-2 from the RNT treatment, and from 724 g m-2 to 1016 g m-2 for the FNT treatment. Moreover, soil CO2 emissions were significantly correlated with dissolved organic C, aboveground biomass and root biomass. Therefore, our results suggesting that annual rice-fallow-oilseed rape rotation should be considered to assess the effects of tillage systems on soil CO2 emission.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | English |
| Published: |
Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
2015
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| Online Access: | http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162015000300015 |
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