In the article "Methane emission from a flooded rice field under pre-germinated system" published in Ciência Rural, volume 49, number 11, DOI http://dx.doi.org/ 10.1590/0103-8478cr20190336.
In the ABSTRACT, where we read:
The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.51 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 27.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg grain).
Read:
The study showed high seasonal emission of methane (CH4) for the studied area, probably due to the long flooding period. It was estimated the CH4 emission factor (6.2 kg CH4 ha-1 dia-1), the partial global warming potential (pGWP, 26.2 Mg CO2eq growing season-1 ha-1) and the yield-scaled pGWP (YpGWP, 3.9 kg CO2eq kg grain).
In the RESUMO, where we read:
Foi estimado o fator de emissão de CH4 (6,51 kg CH4 ha-1 dia-1), o potencial de aquecimento global parcial (PAGp, 27,2 Mg CO2eq estação de crescimento-1 ha-1) e o PAGp escalonado pelo rendimento (R) de grãos (PAGpR, 3,9 kg CO2eq kg-1 grão).
Read:
Foi estimado o fator de emissão de CH4 (6,2 kg CH4 ha-1 dia-1), o potencial de aquecimento global parcial (PAGp, 26,2 Mg CO2eq estação de crescimento-1 ha-1) e o PAGp escalonado pelo rendimento (R) de grãos (PAGpR, 3,9 kg CO2eq kg-1 grão).
In the text, where we read:
The mean daily CH4 emission was estimated as 616 mg of CH4 m-2 d-1 (CV: 17.15%) and the accumulated emission during the season was 93.60 g CH4 m-2 (CV: 17.15%), corresponding to a CH4 emission factor of 6.51 kg CH4 ha-1 d-1, which is five times higher than the average indicated by the IPCC (2006), of 1.30 kg CH4 ha-1 d-1.
Read:
The mean daily CH4 emission was estimated as 616 mg of CH4 m-2 d-1 (CV: 17.15%) and the accumulated emission during the season was 93.60 g CH4 m-2 (CV: 17.15%), corresponding to a CH4 emission factor of 6.2 kg CH4 ha-1 d-1, which is five times higher than the average indicated by the IPCC (2006), of 1.30 kg CH4 ha-1 d-1.
In the text, where we read:
Data of these variables are presented in the Figure 1C. Plant and floodwater height, soil and water pH, and oxide-reduction potential showed no significant correlations with CH4 emissions. pGWP was evaluated as 27.2 Mg CO2eq ha-1 GS-1. Rice production was estimated as 6.8 t ha-1, the value calculated for YpGWP being 3.9 kg CO2eq kg1 of grains, a value much higher than those reported in the literature (Table 2). This study resulted in a CH4 emission factor (6.5 kg CH4 ha-1 d-1) for an irrigated rice production system typically used in the state of São Paulo, thus contributing to national and regional databases on CH4 emission factors, which are critical for improving greenhouse gas emission estimates.
Read:
Data of these variables are presented in the Figure 1C. Plant and floodwater height, soil and water pH, and oxide-reduction potential showed no significant correlations with CH4 emissions. pGWP was evaluated as 26.2 Mg CO2eq ha-1 GS-1. Rice production was estimated as 6.8 t ha-1, the value calculated for YpGWP being 3.9 kg CO2eq kg-1 of grains, a value much higher than those reported in the literature (Table 2). This study resulted in a CH4 emission factor (6.2 kg CH4 ha-1 d-1) for an irrigated rice production system typically used in the state of São Paulo, thus contributing to national and regional databases on CH4 emission factors, which are critical for improving greenhouse gas emission estimates.
Publication Dates
-
Publication in this collection
03 July 2020 -
Date of issue
2020
