Aquatic plant cultivating device and method for cultivating plants and purifying water by using same

Abstract

The invention provides an aquatic plant cultivating device and a method for cultivating plants and purifying water by using the same. The aquatic plant cultivating device comprises a three-dimensional spatial structure made of a hard framework, wherein a basal layer for allowing plant roots to pass through is arranged at the bottom of the three-dimensional spatial structure; a positioning layer for allowing the plant roots to pass through is further arranged inside the three-dimensional space and above a lower netlike sheet. The method comprises the following steps: (1) planting the plants into the aquatic plant cultivating device; (2) putting the aquatic plant cultivating device with the plants into a water body; (3) when the plant coverage rate reaches more than n%, harvesting the plants to enable the coverage rate to be lower than m%; or raising fishes into the aquatic plant cultivating device so as to enable the plant coverage rate to be not greater than a preset value. The aquatic plant cultivating device is divided into two spatial layers, the plants are fixed by the positioning layer, and two or more types of plants can be cultivated at the same time. By the water purifying method, any eutrophic inland water body and any urban landscape water body can be purified, so that the water purifying method is an environment-friendly and secondary-pollution-free ecological engineering technology.

Description

【Technical field】 [0001] The invention relates to the field of cultivation, in particular to a device for cultivating aquatic plants, and a method for cultivating plants and purifying water using the device. 【Background technique】 [0002] Utilizing the purification effect of aquatic plants on sewage to carry out the restoration process of polluted water bodies, and there are few wastes and discharges, undoubtedly provides a good way for the restoration of my country's deteriorating water environment, and has a broad market and application prospects. According to the ecological characteristics, aquatic plants are divided into the following four categories: (1) Emergent plants: the roots grow in the soil, and the stems and leaves protrude from the water surface. Most of them are divided into stems and leaves. Leave the water surface, such as reeds, calamus, etc.; (2) Floating leaf plants: also known as floating water plants, the roots grow in the soil, the stems are thin and ...

AI Technical Summary

Problems solved by technology

[0004] The cages used in the existing technology of raising grass and purifying water in cages are mainly for cultivating certain types of submerged plants. These cages are box-shaped single-space structures, and cannot simultaneously cultivate submerged plants and floating leaf plants. The purification effect of the water body is not comprehensive enough, the purification of each level of the water body is insufficient, the environment and space for plant growth are not fully utilized, and the cost of water body purification is high and the effect is poor

There are also some cages with complex designs, using complicated space separation structures to separate different types of plants, but the structures are too complicated, the production cost is high, and the space is not fully utilized, which is not conducive to plant growth

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