PT  - JOURNAL ARTICLE
AU  - Jiang, Yu
AU  - Qian, Haoyu
AU  - Huang, Shan
AU  - Zhang, Xingyue
AU  - Wang, Ling
AU  - Zhang, Li
AU  - Shen, Mingxing
AU  - Xiao, Xiaoping
AU  - Chen, Fu
AU  - Zhang, Hailin
AU  - Lu, Changying
AU  - Li, Chao
AU  - Zhang, Jun
AU  - Deng, Aixing
AU  - van Groenigen, Kees Jan
AU  - Zhang, Weijian
TI  - Acclimation of methane emissions from rice paddy fields to straw addition
AID  - 10.1126/sciadv.aau9038
DP  - 2019 Jan 01
TA  - Science Advances
PG  - eaau9038
VI  - 5
IP  - 1
4099  - http://advances.sciencemag.org/content/5/1/eaau9038.short
4100  - http://advances.sciencemag.org/content/5/1/eaau9038.full
SO  - Sci Adv2019 Jan 01; 5
AB  - Straw incorporation is a common long-term practice to improve soil fertility in croplands worldwide. However, straw amendments often increase methane (CH4) emissions from rice paddies, one of the main sources of anthropogenic CH4. Intergovernmental Panel on Climate Change (IPCC) methodologies to estimate CH4 emissions from rice agriculture assume that the effect of straw addition remains constant over time. Here, we show through a series of experiments and meta-analysis that these CH4 emissions acclimate. Effects of long-term (>5 years) straw application on CH4 emissions were, on average, 48% lower than IPCC estimates. Long-term straw incorporation increased soil methanotrophic abundance and rice root size, suggesting an increase in CH4 oxidation rates through improved O2 transport into the rhizosphere. Our results suggest that recent model projections may have overestimated CH4 emissions from rice agriculture and that CH4 emission estimates can be improved by considering the duration of straw incorporation and other management practices.