Comparing protected cucumber and field cucumber production systems in China based on emergy analysis

JOURNAL OF CLEANER PRODUCTION

卷:236

Article

Zhao, Huan¹  Zhai, Xiajie²  Guo, Lizhu¹  Yang, Yuejuan¹  Li, Jiahuan¹  Ren, Cheng¹  Wang, Kaili¹  Liu, Xiqiang¹  Zhan, Ruyi¹  Wang, Kun¹ 

[1] China Agr Univ, Coll Grassland Sci & Technol, Beijing 100193, Peoples R China

[2] Chinese Acad Forestry, Beijing Key Lab Wetland Serv & Restorat, Inst Wetland Res, Beijing 100091, Peoples R China

关键词: Emergy evaluation;    Facility agriculture;    Vegetable;    Planting patterns;    Sustainability;   

DOI  :  10.1016/j.jclepro.2019.117648

来源: Elsevier

【 摘 要 】

Cucumber is an important vegetable, which provides essential minerals, vitamins and nutrients for human body and is widely cultivated in China on account of its delicious taste, short nutritional cycle and high economic benefits. To comprehensively evaluate the sustainability of the cucumber production systems under two planting patterns (the protected cucumber production system and the field cucumber production system), and to provide constructive suggestions for an efficient and sustainable development of the production systems, the emergy evaluation method was utilized to analyze the composition and metabolism of the emergy flows in the production systems based on 2016 provincial data from China. The results show that the mean value of natural resources input of the field cucumber production system (13.59E+14 sej/ha) was significantly higher than that of the protected cucumber production system (5.92E+14 sej/ha). However, the mean values of the purchased resources input, total emergy input and total energy output had the contrary trend. The extent to which the cucumber production systems under two planting patterns are dependent on the environment is different. The field cucumber production system uses more natural resources and the degree of utilization of natural resources is geographically distributed. More natural resources are utilized in the south of China where natural conditions are better. However, the protected cucumber production system uses more purchased resources, especially the nonrenewable resources, and has the characteristics of high input, high output but low production efficiency. Improving the efficiency of resources utilization, using more clean energy and improving the degree of mechanization will contribute to a cleaner, more efficient and sustainable development of the cucumber production system. (C) 2019 The Authors. Published by Elsevier Ltd.

【 授权许可】

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