1. Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/Key Lab. of Crop Physiology and EcologyMinistry of AgricultureBeijing100081China
2. Heilongjiang Academy of Agricultural SciencesHarbin150086China
3. Carbon Management and Sequestration Center, SENROhio State Univ.ColumbusOH43210
4. Jilin Academy of Agricultural SciencesChangchun130124China