1 The existing ecological floating island cultivation is not easy to be standardized and applied. Different lakes and rivers have different levels of eutrophication, water flow, temperature, wind speed, water body fluctuations, etc., which require the corresponding floating island design combination and the combination of floating island plant species. It is difficult to formulate a unified standard for promotion and application .
2. The existing ecological floating islands are difficult to implement mechanized operations. The ecological floating island floats on the water surface, and daily management is completed on the water surface. Nowadays, most of its management operations are done manually, which is acceptable in small-scale experiments and demonstrations. If it is promoted in a large area, it needs frequent and timely harvesting and manual operation. It cannot meet the needs and restrict its development.
3. The construction period of the existing ecological floating island is long. From the current point of view, most ecological floating islands adopt on-site production and on-site planting, and the large-scale production and construction period is long.
4. The existing ecological floating islands are difficult to survive the winter. Most of the plants on the ecological floating island cannot survive the winter, especially in the northern areas where the weather is colder in winter, the plants need to be replanted in the second spring.
5. Most of the existing ecological floating islands use large aquatic plants and aquatic vegetables that are difficult to withstand extreme winds, rains and waves.
6. The ecological floating islands currently used at home and abroad are small in size, and most of them are used in small areas of rivers and lakes. It is difficult to carry out ecological restoration of larger rivers and lakes. Now a large area of ecological floating islands are needed.
