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| Greenhouse Gas Emissions from Major Energy Consumption in Wheat Production in China |
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| KeyWord:climate change; agricultural production; wheat; greenhouse gases; energy consumption; carbon sink |
| Author Name | Affiliation | | LI Feng | School of Environment, Renmin University of China, Beijing 100872, China |
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| Abstract: |
| Agricultural production is a main source of greenhouse gas（GHG） emission. However, there is limited information available about estimates of GHG emissions from agriculture-related energy consumption in China. Here we developed a method based on agricultural inputs and their costs to estimate energy consumption and GHG emissions in crop production. By bottom-up analysis and statistics, we found that major agricultural inputs included chemical fertilizer, manure, pesticides, plastic films, machinery and energy. In wheat production, the total GHG emissions were 378 million tons carbon dioxide equivalent, or 18.23 tons carbon dioxide equivalent per hectare in China in 2010, of which emissions from major agricultural inputs were about 88 million tons carbon dioxide equivalent, accounting for 23.30% of the total GHG emissions. The carbon dioxide absorbed by wheat was about 307 million tons in China in 2010, being 81.25% of the total GHG emissions. The net emissions from wheat production were 71 million tons. Calculation showed that the wheat yields should be 6.83 tons per hectare so that zero emissions of GHGs could be obtained in wheat production（total GHGs emissions equals total GHGs absorption by wheat）. |
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