Evaluation of energy input and output of sweet sorghum grown as a bioenergy crop on coastal saline-alkali land

Ren, L.T. and Liu, Z.X. and Wei, T.Y. and Xie, G.H. (2012) Evaluation of energy input and output of sweet sorghum grown as a bioenergy crop on coastal saline-alkali land. Energy. pp. 1-8.

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This study investigated the energy productivity and input sensitivity of sweet sorghum (Sorghum bicolor (L.) Moench), as compared with cotton and maize, at two coastal saline-alkali sites in Shandong Province, China. The data were collected quantitatively using a questionnaire for face-to-face interviewing of 116 farmers. The sorghum showed a lower energy input requirement than cotton and maize. The energy productivity indices were 12.4 and 9.2 for sweet sorghum, which were much higher than for cotton (3.1) at Wudi and maize (8.4) at Wendeng, respectively. Nitrogen fertilisation contributed the highest proportions (between 56% and 69% for the three crops) to the total energy consumption, as compared with the seed, labour, machinery, diesel fuel, phosphorus and potassium fertilisers, irrigation water, plastic film, and pesticides. All of the crops consumed much more non-renewable energy than renewable energy. According to the Cobb–Douglas production function, the diesel and nitrogen fertiliser energy inputs had a significantly positive impact on the sweet sorghum energy output. The energy crop showed an increasing return to scale, with cotton showing a constant and maize a decreasing return. These findings indicate that the sweet sorghum energy output is possible to be increased with further technical research and development.

Item Type: Article
Uncontrolled Keywords: Cotton; Maize; Energy use; Sensitivity analysis; Sustainability
Author Affiliation: China Agricultural University, 100193 Beijing, PR China, Qiqihar University, 161006 Qiqihar, Heilongjiang, PR China, National Energy R&D Center for Non-food Biomass, 100193 Beijing, PR China
Subjects: Agricultural Engineering
Crop Improvement
Divisions: Sorghum
Depositing User: Mr. SanatKumar Behera
Date Deposited: 20 Oct 2012 05:57
Last Modified: 20 Oct 2012 05:57
Official URL: http://dx.doi.org/10.1016/j.energy.2012.09.024
URI: http://eprints.icrisat.ac.in/id/eprint/8465

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