Journal cover Journal topic
Biogeosciences An interactive open-access journal of the European Geosciences Union
Biogeosciences, 11, 2287-2294, 2014
https://doi.org/10.5194/bg-11-2287-2014
© Author(s) 2014. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
24 Apr 2014
Trade-offs between high yields and greenhouse gas emissions in irrigation wheat cropland in China
Z. L. Cui1,*, L. Wu1,*, Y. L. Ye2, W. Q. Ma3, X. P. Chen1, and F. S. Zhang1 1Center for Resources, Environment and Food Security, China Agricultural University, Beijing 100193, China
2College of Resources and Environmental Science, Henan Agricultural University, Zhengzhou 450000, China
3College of Resources and Environmental Science, Hebei Agricultural University, Baoding 071001, China
*These authors contributed equally to this work.
Abstract. Although the concept of producing higher yields with reduced greenhouse gas (GHG) emissions is a goal that attracts increasing public and scientific attention, the trade-off between high yields and GHG emissions in intensive agricultural production is not well understood. Here, we hypothesize that there exists a mechanistic relationship between wheat grain yield and GHG emission, and that could be transformed into better agronomic management. A total 33 sites of on-farm experiments were investigated to evaluate the relationship between grain yield and GHG emissions using two systems (conventional practice, CP; high-yielding systems, HY) of intensive winter wheat (Triticum aestivum L.) in China. Furthermore, we discussed the potential to produce higher yields with lower GHG emissions based on a survey of 2938 farmers. Compared to the CP system, grain yield was 39% (2352 kg ha−1) higher in the HY system, while GHG emissions increased by only 10%, and GHG emission intensity was reduced by 21%. The current intensive winter wheat system with farmers' practice had a median yield and maximum GHG emission rate of 6050 kg ha−1 and 4783 kg CO2 eq ha−1, respectively; however, this system can be transformed to maintain yields while reducing GHG emissions by 26% (6077 kg ha−1, and 3555 kg CO2 eq ha−1). Further, the HY system was found to increase grain yield by 39% with a simultaneous reduction in GHG emissions by 18% (8429 kg ha−1, and 3905 kg CO2 eq ha−1, respectively). In the future, we suggest moving the trade-off relationships and calculations from grain yield and GHG emissions to new measures of productivity and environmental protection using innovative management technologies.

Citation: Cui, Z. L., Wu, L., Ye, Y. L., Ma, W. Q., Chen, X. P., and Zhang, F. S.: Trade-offs between high yields and greenhouse gas emissions in irrigation wheat cropland in China, Biogeosciences, 11, 2287-2294, https://doi.org/10.5194/bg-11-2287-2014, 2014.
Publications Copernicus
Download
Share