Root system induction method of woody plants in subsurface flow constructed wetland environment

Abstract

The invention discloses a root system induction method of woody plants in a subsurface flow constructed wetland environment. According to the method, an optimal testing design is carried out on four factors which influence the number and length of a woody plant aquatic root system in a subsurface flow constructed wetland environment by using oleander and hibiscus woody plants as materials, and the optimized root system induction conditions are as follows: one fourth of the root of the oleander is cut, the concentration of hormone is 1,000mg/kg, the substrate is peat soil, and the aeration time is 8 hours a day; one eighth of the root of the hibiscus is cut, the concentration of hormone is 1,000mg/kg, the substrate is roseite, and the aeration time is 16 hours a day. By utilizing the method, the tissue structure of the woody plant root system can be changed, and the aquatic root system grows out to achieve the aim of strong adaptability to an aqueous environment, so that the problem that most herbaceous plants in the constructed wetland wither in winter can be solved, the plant screening range of the constructed wetland can be enlarged, the variety and sightseeing property of species can increased. Therefore, the method has well application prospect.

Description

technical field [0001] The invention belongs to the technical field of ecological environment, and in particular relates to a root induction method of woody plants in a subsurface flow artificial wetland environment. Background technique [0002] Subsurface flow constructed wetland is the most commonly used constructed wetland type at present. In the subsurface constructed wetland system, the sewage flows under the surface of the wetland bed. On the one hand, it can make full use of the biofilm growing on the surface of the filler, the rich root system, the surface soil and the interception of the filler to improve its treatment effect and capacity; On the other hand, because the water flows below the surface, it has the characteristics of good thermal insulation performance, little impact on the treatment effect by climate, and good sanitation conditions. [0003] At present, the subsurface constructed wetland plants for domestic sewage treatment are basically herbaceous p...

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Problems solved by technology

[0005] The present invention aims to overcome the problem that most of the herbaceous plants die in artificial wetlands in subtropical regions, and provides a root induction method for woody plants in the subsurface flow constructed wetland environment, so that the woody plants can adapt to the sub

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