内蒙古沙漠化草原生物源挥发性有机物排放特征

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Abstract

In July 2017, a dynamic chamber system, simultaneously recording air temperature, relative humidity and photosynthetically active radiation, was employed to study the emission of biogenic volatile organic compounds (BVOC) from desert grassland of Inner Mongolia. The results showed that Leymus chinensis and Agropyron cristatum growing in desert grassland emitted isoprene, α-pinene, β-pinene, α-phellandrene, 3-carene, α-terpinene, p-cymene, limonene, γ-terpinene, terpinolene, ocimene and camphene, with the average emission fluxes of (578.76±92.39), (35.51±20.23), (23.62±5.62), (380.48±206.97), (15.70±4.72), (36.21±10.53), (62.46±10.36), (36.63±22.83), (85.44±48.33), (5.59±5.33), (17.62±3.32), (173.39±201.97)μg/(m²·h) from Leymus chinensis and (587.36±298.57), (7.24±0.28), (80.09±0.32), (204.49±122.10), (4.64±0.83), (9.96±3.32), (18.86±5.73), (4.49±4.37), (63.02±27.51), (7.26±5.09), (23.06±1.86), (32.30±26.29)μg/(m²·h) from Agropyron cristatum, respectively. The changes of BVOC emission fluxes were consistent with that of air temperature and photosynthetic effective radiation, but the influencing factors were different from plant to plant, and the emission processes were complex. The emission fluxes of BOVCs peaked at 11:00 or 15:00, except isoprene emission from Agropyron cristatum were higher at 15:00 and 17:00.

Key words： biogenic volatile organic compounds air temperature photosynthetic active radiation (PAR) emission fluxes

Received: 03 September 2018

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X511

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	DU Chang-di
	BAO Hai
	ZHAO Yuan-yuan

Cite this article:

DU Chang-di,BAO Hai,ZHAO Yuan-yuan. The emission of biogenic volatile organic compounds from desert grassland in Inner Mongolia[J]. CHINA ENVIRONMENTAL SCIENCECE, 2019, 39(5): 1854-1861.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2019/V39/I5/1854

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