Spirulina acclimatization method and application thereof

Abstract

The invention discloses a spirulina acclimatization method and application thereof. The method comprises of preparing a culture medium, carrying out salt resistance acclimatization, nitrogen and phosphorus content reduction acclimatization, to-be-treated water quality adaptation acclimatization and the like on screened algae. After the step-by-step amplification culture, the algae is introduced into kaline soil, the spirulina propagate massively by using the photosynthesis and absorbs and fixs nitrogen and phosphorus elements in the atmosphere and water sources, after the propagation, spirulina culture water is discharged, the spirulina is deposited in the soil, and the spirulina contains a large amount of elements such as nitrogen, phosphorus and the like. When the primary treatment is carried out by adopting the method, the nitrogen content in the soil is increased by 21 to 23 percent, the phosphorus content in the soil is increased by 11 to 14 percent, the total salt content is reduced by 20 to 25 percent, the nutrition element loss caused by a water washing method is avoided, the hardening on the soil and the secondary pollution to water sources and the environment caused by fertilizer application are also avoided, the soil fertility is gradually enhanced through performing the treatment many times, the soil recovery can be accelerated, and the goal of improving the ecological environment is finally achieved.

Description

Technical field [0001] The invention discloses a method for improving saline-alkali soil and increasing soil fertility by using nitrogen-fixing cyanobacteria, in particular to a method for treating saline-alkali soil by using spirulina. Background technique [0002] Saline-alkali soils are widely distributed all over the world, covering more than 30 countries on six continents. Mainly distributed in India, Pakistan, Russia, South Africa and other countries, the total area is about 956 million hectares. Among them, India and Pakistan have 8.09 million hectares, and Russia has 7.5 million hectares. The area of ​​saline-alkali land in the western United States accounts for about half of the irrigation area, and the annual output of saline-alkali is reduced by more than 25%. Land salinization is an important part of land desertification, and it is a serious threat to the resolution of a series of major problems in local agricultural and animal husbandry production, the prosperity a...

AI Technical Summary

Problems solved by technology

) Among the existing main methods for controlling saline-alkali land, the water washing and salt discharge adopted by the physical method are likely to cause the loss of soil nutrients, and require large material and financial resources, while the fertilization or acid-base balance adopted by the chemical method is likely to cause soil compaction and Excessive governance costs

Although physical and chemical methods can temporarily change the salinity of the soil, they cannot essentially change the soil fertility of the original saline-alkali land.

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