Culture medium

Abstract

The invention discloses a culture medium. The culture medium is characterized by being prepared from the following components in parts by weight: 1 part of a desalted filling sea mud mixed medium, 0.5-1.0 part of calcium superphosphate, 0.8-1.5 parts of an organic fertilizer and 1.2-2.0 parts of sludge, wherein the organic fertilizer is at least one of cow dung, chicken manure and pig manure. Compared with the desalted filling sea mud mixed medium, the physical and chemical properties of the culture medium are greatly improved; the pH is lowered; microaggregates are increased; the fertility is improved; and the culture medium can be applied to greening of relatively multiple plant species in relatively large area. The sludge is developed and utilized as a main fertilizer, so that a new path is explored for disposal and utilization of the sludge.

Description

technical field [0001] The invention relates to the field of cultivation, in particular to a cultivation substrate. Background technique [0002] With the development of the economy and the vigorous development of urban infrastructure, the demand for land resources is increasingly urgent. Using the dredged salt-containing dredging sea mud to reclaim land has become an effective way for coastal cities to alleviate the shortage of land resources. At the same time With the increase of urban greening area and the strengthening of people's awareness of environmental protection, the greening of coastal cities has been paid more and more attention, and the large area of ​​saline-alkali soil resources in coastal cities makes the land resources for urban greening more tense. Dredging reclamation sea mud is deposited by the flocculation of salt in seawater from the alluvium of modern rivers. There is no soil-forming process. It is not natural soil, but the soil-forming parent material...

AI Technical Summary

Problems solved by technology

[0004] Although the above method solves the problems of high salinity, poor structure, and lack of plant planting and survival in dredged reclamation sea mud, there are still the following deficiencies. Desalination through natural rainfall, and then improvement through natural succession of saline vegetation needs The cycle is too long to meet the time requirements of landscaping construction, economic development and human settlements construction. Mixing calcium carbide slag, fly ash, alkali slag, and coarse bone materials solves the problem of rapid desalination of dredged sea mud. The structure of the mixed matrix has also been significantly improved, but the pH value of the mixed matrix after desalination is high, the texture is mainly sand grains, the air permeability is strong, and the water and fertilizer retention capacity is low. At the same time, the organic matter content of the dredged sea mud is low, and the fertility is poor. As a result, when greening with mixed substrates after desalination, problems such as single greening tree species, lack of biodiversity, poor plant growth, low ecological benefits, and monotonous landscapes may occur, and it is impossible to achieve a major breakthrough in large-scale greening, nor can it achieve more. great ecological effect