| 页岩气压裂返排液对小麦生长及生理特性的影响 |
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| 引用本文： | 李炎,徐敏,许瑶,田冬梅,伍钧.页岩气压裂返排液对小麦生长及生理特性的影响[J].农业环境科学学报,2020,39(5):944-952. |
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| 作者姓名： | 李炎 徐敏 许瑶 田冬梅 伍钧 |
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| 作者单位： | 四川农业大学环境学院,成都 611130;四川农业大学环境学院,成都 611130;四川农业大学环境学院,成都 611130;四川农业大学环境学院,成都 611130;四川农业大学环境学院,成都 611130 |
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| 基金项目： | 四川省科技支撑计划项目（2015SZ0007） |
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| 摘 要： | 为了探究页岩气开采产生的压裂返排液对农作物的影响,以冬小麦为材料,探究了小麦3个不同关键生育期(播种期、分蘖期、抽穗期)施入压裂返排液对小麦生长及旗叶、根部生理特性的影响。结果表明:随着返排液浓度升高,小麦株高、生物量、产量总体呈下降趋势,光合作用及抗氧化酶活性均呈先升高后降低的趋势,可溶性糖含量显著降低。播种期、分蘖期、抽穗期施入返排液浓度分别为≥50、50、150 g·kg^-1时,小麦株高显著降低;返排液浓度分别为≥200、150、200 g·kg^-1时小麦生物量明显降低;返排液浓度分别为≥200、150、100 g·kg^-1时,小麦产量、光合作用及抗氧化酶活性明显降低。研究表明,高含量的有机物及盐分离子是压裂返排液中的主要污染物。在播种期、分蘖期、抽穗期返排液泄漏进入农田土壤的浓度分别为≥200、150、100 g·kg^-1时,返排液通过诱导小麦氧化应激反应进而影响光合作用及植物生长,其中返排液于抽穗期进入土壤对小麦影响最大。
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| 关 键 词： | 页岩气 压裂返排液 小麦 光合参数 抗氧化系统 |
| 收稿时间： | 2019/10/31 0:00:00 |
Effects of shale gas fracturing fluid on wheat growth and physiological characteristics |
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| LI Yan,XU Min,XU Yao,TIAN Dong-mei and WU Jun.Effects of shale gas fracturing fluid on wheat growth and physiological characteristics[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2020,39(5):944-952. |
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| Authors: | LI Yan XU Min XU Yao TIAN Dong-mei and WU Jun |
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| Institution: | College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China,College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China,College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China,College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China and College of Environmental Science, Sichuan Agricultural University, Chengdu 611130, China |
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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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| Keywords: | shale gas fracturing fluid wheat photosynthesis parameters antioxidant system |
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