文献类型：期刊文献

英文题名：Assessing the efficiency and sustainability of wheat production systems in different climate zones in China using emergy analysis

作者：Zhao, Huan[1] Zhai, Xiajie[1,2] Guo, Lizhu[1] Liu, Kesi[1] Huang, Ding[1] Yang, Yuejuan[1] Li, Jiahuan[1] Xie, Shu[1] Zhang, Cong[1] Tang, Shiming[1] Wang, Kun[1]

第一作者：Zhao, Huan

通信作者：Wang, K[1]

机构：[1]China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China;[2]Chinese Acad Forestry, Inst Wetland Res, Beijing Key Lab Wetland Serv & Restorat, Beijing 100091, Peoples R China

年份：2019

卷号：235

起止页码：724-732

外文期刊名：JOURNAL OF CLEANER PRODUCTION

收录：;EI(收录号：20192807162678);Scopus(收录号：2-s2.0-85068449587);WOS:【SSCI(收录号:WOS:000482491500060)，SCI-EXPANDED(收录号:WOS:000482491500060)】；

基金：We thank Dr Jinlong Gao for assistance in constructing Figs. 2 and 3. We also thank the National Natural Science Fund (No. 31772654) for its support. Last but not least, we would like to thank the anonymous review experts for their comments and suggestions.

语种：英文

外文关键词：Emergy analysis; Wheat; Climate zone; Efficiency; Planting structure adjustment

摘要：China is the country with the largest wheat planting area in the world, and wheat is one of the two main staple food crops consumed in China. Wheat is widely cultivated in 15 provinces throughout the country and across 3 climate zones including the subtropical monsoon climate zone, temperate monsoon climate zone and temperate continental climate zone. The natural conditions of each climate zone are different, and the ways in which the wheat production system operates are different. To ultimately safeguard the production and explore the similarities and differences in input and output of the same system under different climate conditions, the emergy method was used to research the comprehensive performance of the wheat production system based on 2014 statistical data from China. The results indicate that there was a significant variance in the input of local renewable environmental resources, ranging from 0.48E+14 sej/ha in Xinjiang in the temperate continental climate zone to 4.46E+14 sej/ha in Shaanxi in the temperate monsoon climate zone. Among the three climatic zones, the temperate continental climate zone had the lowest emergy self-support ratio (0.13), followed by the temperate monsoon climate zone (0.15) and then the subtropical monsoon climate zone (0.20). Regions in which natural resources are insufficient, such as temperate continental climate zone, need additional purchased resources to maintain normal operation of the wheat production system. Compared with other intensive agricultural production systems, the wheat production system is extensive and low-cost and has room for improvement with more artificial input. The Middle-Lower Yangtze River Plain at the junction of temperate monsoon climate zone and subtropical monsoon climate zone is the most efficient region for planting wheat based on the ratio of the entire emergy input to the entire energy output. This ratio should be considered in the adjustment of the agricultural cropping structure to make use of resources more effectively. (C) 2019 The Authors. Published by Elsevier Ltd.