植物+微生物联合生态沟渠在盐度胁迫下的营养盐去除效果

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Abstract To efficiently remove nutrient salts in high salinity lakes, this study implemented a plant+microbial ditch at Daihai Lake. The nutrient removal efficiency, plant growth, and microbial community dynamics of this ecological ditch was investigated across different salinity gradients. Immobilizing Bacillus amyloliquefaciens on polyurethane sponge within the ditch could significantly promote the growth of plant, enhance the activity of antioxidant stress-related enzymes, and strengthen the ability of plants to absorb and assimilate nutrients. Addiing Bacillus amyloliquefaciens in the ditch could not make it become the absolute dominant genus. but it could improve the microbial community structure, increase the abundance of functional microorganisms involved in nitrogen and phosphorus removal, and enhance the water purification capacity of the ditch. Compared to ecological ditches with plant-only or microorganism-only, the integrated ecological ditch could achieve higher nutrient removal rates across different salinity concentrations. Specifically, over 70% TN, NH₄⁺-N, TP, and CODCr could be removed in the integrated ditch at 15g/L salinity. Compared plant-only ditch, the activities of superoxide dismutase (SOD), catalase (CAT), and peroxidase (POD) in plants were increased 33.7%, 43.6%, and 38.7%, respectively, in planted+microbial ditch at 15.0g/L salinity.

Key words： Bacillus amyloides biological ditch salinity stress antioxidant stress enzymes

Received: 06 June 2024

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X171

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	Articles by authors
	YANG Wen-huan
	PENG Yao-hua
	XU Yan
	YAO Zhi
	WANG Le-le
	LI Wei-ping

Cite this article:

YANG Wen-huan,PENG Yao-hua,XU Yan等. Nutrient removal effect of plant+microbial combined ecological ditch under salinity stress[J]. CHINA ENVIRONMENTAL SCIENCECE, 2025, 45(1): 430-439.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2025/V45/I1/430

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