Method for preventing and treating shallow water system eutrophic lake by virtue of aquatic plants

Abstract

The invention provides a method for preventing and treating a shallow water system eutrophic lake by virtue of aquatic plants. The method comprises the following steps: (1) with an emergent aquatic plant as a host, inoculating glomus intraradices to a pot culture matrix, and carrying out culturing at 25-30 DEG C for 5-10 days, wherein the mass ratio of zeolite to medical stone to acid-modified argil in the pot culture matrix is 1 to 3 to (0.1-0.3); (2) adding seeds of the emergent aquatic plant into water in a volume ratio of 1 to 2, soaking for 12-24 hours, uniformly scattering the seeds to aculture bed, carrying out culturing at 28-35 DEG C for rooting, covering the culturing bed with a layer of water-immersed silk screen cloth, and transplanting after roots grow to the lengths of 3cm-5cm; (3) fetching adlittoral mud of the eutrophic lake as a soil medium, mixing the adlittoral mud with the pot culture matrix in a mass ratio of (2.5-3) to (1-1.2), carrying out constant-temperature fermentation at 25 DEG C for 24-48 hours, and after the fermentation is finished, transplanting buds of the emergent aquatic plant in the step (2) to the upper part of the mixture; and (4) carrying outculturing by virtue of the culturing bed at 28-35 DEG C for 10-15 days, and externally conveying pots to a shallow water site or an artificial floating island so as to restore an eutrophic water bodyof the shallow water lake when the plant heights are over 8cm, and the infection rates of glomus intraradices at plant roots reach over 95% and the ion concentration of Fe is 4.2mg / L-6.4mg / L throughdetermination.

Description

technical field [0001] The invention relates to a technology for treating eutrophic lakes in shallow water systems, in particular to a method for using aquatic plants to prevent and control eutrophic lakes in shallow water systems. Background technique [0002] At present, the use of plants to restore water eutrophication is more and more widely recognized. When this technology is used, the N element in the water can be easily removed. In the existing research, such as the publication number: "CN103172177A" patent discloses a The method for improving the eutrophication repairing ability of plants by using microorganisms, the technical scheme is: a method for improving the eutrophication repairing abilities of plants by using microorganisms, 1) using white clover as the host plant, inoculating Glomus mosei on pearl Rock: Vermiculite weight ratio is 1:1~2 on the pot culture medium, culture 10-20 days; 2) the white clover root obtained in step 1) is cut into 0.5~1cm long root s...

AI Technical Summary

Problems solved by technology

However, through practical measurement, the adsorption of N and P is less than 40%.

[0005] Although the above studies can all absorb N and P, which can alleviate the eutrophication of the water body, due to its poor adsorption capacity, it is impossible to completely control the eutrophication of the water body.