1. College of Agronomy and Biotechnology; China Agricultural University; Beijing 100193 China
2. National Energy R&D Center for Biomass; China Agricultural University; Beijing 100193 China
3. College of Light Industry and Textiles; Qiqihar University; Qiqihar Heilongjiang 161006 China
4. Center for Crop Systems Analysis; Wageningen University; P.O. Box 430 Wageningen AK 6700 The Netherlands
5. Institute of Policy and Management; Chinese Academy of Sciences; 15 Zhongguancun Beiyitiao Alley Beijing 100190 China