内蒙古河套灌区春小麦挥发性有机物排放特征

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摘要于2021年5月下旬至6月中旬,采用动态箱采样法对内蒙古河套灌区17种春小麦排放生物源挥发性有机物(BVOC)进行了研究,同时记录了温度、湿度和光合有效辐射(PAR)等参数.结果表明:内蒙古河套灌区春小麦主要排放异戊二烯、α-蒎烯和甲苯,生长期其排放率分别为(0.85~39.31),(2.60~14.32)和(6.41~35.39)ng/(g·h),成熟期其排放率分别为(1.75~7.99),(1.11~5.81)和(1.91~25.61)ng/(g·h);生长期异戊二烯、单萜烯类和BTEX标准状态(T=303K,PAR=1000µmol/(m²·s))下排放率分别为(12.92±5.14),(11.98±7.13)和(23.13±7.32)ng/(g·h),成熟期分别为(2.47±0.64),(5.73±1.19)和(14.23±5.27)ng/(g·h),生长期的排放率明显大于成熟期;一定环境温度和PAR范围内,河套灌区春小麦BVOC排放率与环境温度和PAR均呈指数相关,具有明显的日变化特征,但环境温度超过45℃时会抑制其BVOC排放率.

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	刘智远
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关键词 ：内蒙古河套灌区, 春小麦, 挥发性有机物, 排放率

Abstract：A dynamic chamber system, with built-in air temperature, relative humidity and PAR (photo synthetically active radiation) data loggers, was employed to measure BVOC (Biogenic Volatile Organic Compounds) emissions from spring wheat from late May to mid-June 2021 in Hetao irrigation district of Inner Mongolia. The results showed that spring wheat emitted isoprene, α-pinene and toluene by (0.85~39.31), (2.60~14.32) and (6.41~35.39) ng/(g·h) respectively in the growth period and by (1.75~7.99), (1.11~5.81) and (1.91~25.61) ng/(g·h) respectively in the mature stage. The emissions of isoprene and monoterpenes, BTEX under normal conditions (T=303K, PAR=1000µmol/(m²·s)), were (12.92±5.14), (11.98±7.13) and (23.13±7.32) ng/(g·h) respectively in the growth period, and (2.47±0.64), (5.73±1.19) and (14.23±5.27) ng/(g×h) respectively in the mature period. Within certain ranges of temperature and PAR, BVOC emissions were exponentially correlated with ambient temperature and PAR, but would be inhibited when the air temperature exceeded 45℃.

Key words： Hetao Irrigation District of Inner Mongolia spring wheat volatile organic compounds emissions

收稿日期: 2022-02-13

PACS:

X511

基金资助:国家自然科学基金资助项目(21667021);内蒙古师范大学研究生创新基金项目(CXJJS20111)

通讯作者: 包海,副教授,baohai@imnu.edu.cn E-mail: baohai@imnu.edu.cn

作者简介: 刘智远(1997-),女,内蒙古巴彦淖尔市人,内蒙古师范大学硕士研究生,主要从事生物源挥发性有机化合物的研究.

引用本文:

刘智远, 包海, 杨娜, 高星星, 丁艳旭. 内蒙古河套灌区春小麦挥发性有机物排放特征[J]. 中国环境科学, 2022, 42(9): 4026-4032. LIU Zhi-yuan, BAO Hai, YANG Na, GAO Xing-xing, DING Yan-xu. Emissions of volatile organic compounds from spring wheat in Hetao irrigation district of Inner Mongolia. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(9): 4026-4032.

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http://www.zghjkx.com.cn/CN/ 或 http://www.zghjkx.com.cn/CN/Y2022/V42/I9/4026

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