Quantitative evaluation method of aquatic plant species for repairing eutrophication water

Abstract

The invention discloses a quantitative evaluation method of aquatic plant species for repairing eutrophication water. The quantitative evaluation method comprises the following steps: A, index screening, namely screening to-be-invested water physical and chemical indexes according to eutrophication water characteristics; B, field investigation, namely investing rivers or lakes by adopting a conventional method in a representative region range, recording names of all the aquatic plant species in a quadrat, collecting water samples, and determining physical index of water; C, standard non-dimension disposal calculation, namely classifying the aquatic plants into submerged plants, floating-leaved plants and emergent aquatic plants according to ecotypes, and calculating standard non-dimension disposal data of physical and chemical indexes of water to which each species corresponds according to ecotypes; D, weight giving and total standard deviation calculation, namely giving weight to the physical and chemical indexes, and calculating the general average and total standard deviation of the non-dimension disposal data of each species; E, sorting and quantitative evaluation. The quantitative evaluation method is simple and convenient to operate, fast and accurate, meets the wetland rejuvenation of the rivers, lakes and the like and can be used for promoting the high-efficiency restoration of wetland ecological environments and configuration of functional groups.

Description

technical field [0001] The invention belongs to the technical field of plant ecological restoration, and more specifically relates to a quantitative evaluation method for aquatic plant species for restoration of eutrophic water bodies, which is suitable for the selection of multiple aquatic plant species in wetland restoration and reconstruction projects such as rivers and lakes. Promote efficient restoration of wetland ecological environment and configuration of functional groups. Standardized dimensionless data processing is used to quantitatively evaluate aquatic plants by life form, and multiple species can be evaluated at one time. Background technique [0002] With the vigorous development of ecological civilization in our country, wetland ecological restoration has become an important measure to improve the ecological environment of our country. The use of aquatic plants to restore eutrophic water bodies is a general technology in ecological restoration. In the pract...

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Problems solved by technology

[0003] According to the search of China Patent Network and related paper websites, there is currently no patent related to the quantitative evaluation method of aquatic plants for repairing eutrophic water bodies, but there are literature reports that basically one or two species are controlled indoors through empirical methods or multiple species. The results obtained from comparative experiments under the conditions of two environmental factors can then be applied to ecological restoration practice, such as Zhou Xiaohong et al. "Analysis of the effect of aquatic plants in river beach wetlands on the removal of nitrogen and phosphorus pollutants in water bodies", "Soil and Water Conservation Research", 2007.14 (4) 137 ~140; Gao Jingqing et al., "Effects of Common Submerged Plants on Phosphorus Removal in Severely Eutrophic Water of East Lake", "Yangtze River Basin Resources and Environment", 2007.16 (6) 796-800; Research on the Purification Effect of Nutritious Water Body" "Anhui Agricultural Science" 2012.40 (10) 6083~6085; Xiong Ying et al. "Comparative Study on Growth and Decontamination Ability of Different Emerging Plants in Domestic Sewage" "Environmental Research and Monitoring" 2010.23 (3) 10-13; Fan Kaiqing et al. "Comparison of 5 species of emergent plants for nitrogen and phosphorus purification in eutrophic water bodies" "Jiangsu Agricultural Sciences" 2011.39 (6) 598-599; Jiang Cuiling et al. Absorption of N and P and Prevention and Control of Secondary Pollution" "China Environmental Science" 2004.24(6) 702~706, etc.

The scope of application of these assessment methods is very limited, especially when multiple species are selected, because the similarity of the species' ecological niche will disturb the accuracy of judgment

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