Details
| Original language | English |
|---|---|
| Pages (from-to) | 171-184 |
| Number of pages | 14 |
| Journal | Archives of Agronomy and Soil Science |
| Volume | 63 |
| Issue number | 2 |
| Early online date | 24 May 2016 |
| Publication status | Published - 9 Jun 2016 |
Abstract
A field experiment was conducted to study the effects of combination of straw incorporation and water management on fluxes of CH4, N2O and soil heterotrophic respiration (Rh) in a paddy field in subtropical central China by using a static opaque chamber/gas chromatography method. Four treatments were set up: two rice straw incorporation rates at 0 (S1) and 6 (S2) t ha−1 combined with two water managements of intermittent irrigation (W1, with mid-season drainage) and continuous flooding (W2, without mid-season drainage). The cumulative seasonal CH4 emissions for the treatments of S1W2, S2W1 and S2W2 increased significantly by 1.84, 5.47 and 6.63 times, respectively, while seasonal N2O emissions decreased by 0.67, 0.29 and 1.21 times, respectively, as compared to S1W1 treatment. The significant increase in the cumulative Rh for the treatments S1W1, S2W1 and S2W2 were 0.54, 1.35 and 0.52 times, respectively, in comparison with S1W2. On a seasonal basis, both the CO2-equivalents (CO2e) and yield-scaled CO2e (GHGI) of CH4 and N2O emissions increased with straw incorporation and continuous flooding, following the order: S2W2>S2W1>S1W2>S1W1. Thus, the practices of in season straw incorporation should be discouraged, while mid-season drainage is recommended in paddy rice production from a point view of reducing greenhouse gas emissions.
Keywords
- CH, NO, soil CO emission, straw retention, water regime
ASJC Scopus subject areas
- Agricultural and Biological Sciences(all)
- Agronomy and Crop Science
- Agricultural and Biological Sciences(all)
- Soil Science
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In: Archives of Agronomy and Soil Science, Vol. 63, No. 2, 09.06.2016, p. 171-184.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Greenhouse gas emissions in response to straw incorporation, water management and their interaction in a paddy field in subtropical central China
AU - Wang, Cong
AU - Shen, Jianlin
AU - Tang, Hong
AU - Inubushi, Kazuyuki
AU - Guggenberger, Georg
AU - Li, Yong
AU - Wu, Jinshui
N1 - Funding information: This work was supported by the National Science and Technology Pillar Program of China: [Grant Number 2013BAD11B02], the National Natural Science Foundation of China: [Grant Numbers 41090283 and 41101247], the Recruitment Program of High-end Foreign Experts of the State Administration of Foreign Experts Affairs awarded to Prof. Georg Guggenberger and Prof. Kazuyuki Inubushi: [Grant Number GDT20164300013] and the National Basic Research Program of China: [Grant Number 2012CB417105].
PY - 2016/6/9
Y1 - 2016/6/9
N2 - A field experiment was conducted to study the effects of combination of straw incorporation and water management on fluxes of CH4, N2O and soil heterotrophic respiration (Rh) in a paddy field in subtropical central China by using a static opaque chamber/gas chromatography method. Four treatments were set up: two rice straw incorporation rates at 0 (S1) and 6 (S2) t ha−1 combined with two water managements of intermittent irrigation (W1, with mid-season drainage) and continuous flooding (W2, without mid-season drainage). The cumulative seasonal CH4 emissions for the treatments of S1W2, S2W1 and S2W2 increased significantly by 1.84, 5.47 and 6.63 times, respectively, while seasonal N2O emissions decreased by 0.67, 0.29 and 1.21 times, respectively, as compared to S1W1 treatment. The significant increase in the cumulative Rh for the treatments S1W1, S2W1 and S2W2 were 0.54, 1.35 and 0.52 times, respectively, in comparison with S1W2. On a seasonal basis, both the CO2-equivalents (CO2e) and yield-scaled CO2e (GHGI) of CH4 and N2O emissions increased with straw incorporation and continuous flooding, following the order: S2W2>S2W1>S1W2>S1W1. Thus, the practices of in season straw incorporation should be discouraged, while mid-season drainage is recommended in paddy rice production from a point view of reducing greenhouse gas emissions.
AB - A field experiment was conducted to study the effects of combination of straw incorporation and water management on fluxes of CH4, N2O and soil heterotrophic respiration (Rh) in a paddy field in subtropical central China by using a static opaque chamber/gas chromatography method. Four treatments were set up: two rice straw incorporation rates at 0 (S1) and 6 (S2) t ha−1 combined with two water managements of intermittent irrigation (W1, with mid-season drainage) and continuous flooding (W2, without mid-season drainage). The cumulative seasonal CH4 emissions for the treatments of S1W2, S2W1 and S2W2 increased significantly by 1.84, 5.47 and 6.63 times, respectively, while seasonal N2O emissions decreased by 0.67, 0.29 and 1.21 times, respectively, as compared to S1W1 treatment. The significant increase in the cumulative Rh for the treatments S1W1, S2W1 and S2W2 were 0.54, 1.35 and 0.52 times, respectively, in comparison with S1W2. On a seasonal basis, both the CO2-equivalents (CO2e) and yield-scaled CO2e (GHGI) of CH4 and N2O emissions increased with straw incorporation and continuous flooding, following the order: S2W2>S2W1>S1W2>S1W1. Thus, the practices of in season straw incorporation should be discouraged, while mid-season drainage is recommended in paddy rice production from a point view of reducing greenhouse gas emissions.
KW - CH
KW - NO
KW - soil CO emission
KW - straw retention
KW - water regime
UR - http://www.scopus.com/inward/record.url?scp=84974707291&partnerID=8YFLogxK
U2 - 10.1080/03650340.2016.1193163
DO - 10.1080/03650340.2016.1193163
M3 - Article
AN - SCOPUS:84974707291
VL - 63
SP - 171
EP - 184
JO - Archives of Agronomy and Soil Science
JF - Archives of Agronomy and Soil Science
SN - 0365-0340
IS - 2
ER -