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| Effects of shale gas fracturing fluid on wheat growth and physiological characteristics |
| Received:October 31, 2019 |
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| KeyWord:shale gas;fracturing fluid;wheat;photosynthesis parameters;antioxidant system |
| Author Name | Affiliation | E-mail | | LI Yan | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | | XU Min | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | | XU Yao | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | | TIAN Dong-mei | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | | | WU Jun | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China | wuj1962@163.com |
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| Abstract: |
| Here, we explored the effects of fracturing fluid obtained during shale gas extraction on crop growth. We used winter wheat as the research object to explore the effects of application of fracturing fluid on wheat growth, flag leaf, and root physiological characteristics at three key growth stages (i.e., sowing, tillering, and heading stages). The results revealed that with an increase in the fracturing fluid level, wheat height, biomass, and yield reduced; photosynthetic rate and antioxidant enzyme activity increased and then decreased; and soluble sugar content decreased significantly. In the sowing, tillering, and heading stages, the height of wheat significantly decreased in the soil treated with ≥ 50, 50, and 150 g·kg-1 fracturing fluid, respectively. Furthermore, the wheat biomass was significantly decreased when the concentration of fracturing fluid was 150, 200, and ≥ 200 g·kg-1, respectively. The yield, photosynthesis, and antioxidant enzyme activity of wheat were significantly reduced when treated with ≥ 200, 150, and 100 g·kg-1 fracturing fluid, respectively. The results indicated that organic matter and salt at high concentrations were the main pollutants in fracturing fluid. During the sowing, tillering, and heading stages, fracturing fluid affected photosynthesis and plant growth by inducing wheat oxidative stress response when the concentration of fracturing fluid entering the soil was more than or equal to 200, 150, and 100 g·kg-1, respectively. Among them, fracturing fluid released into the soil during the heading stage had the greatest effect on wheat. |
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