Method for domesticating cylindrospermum and application thereof

Abstract

The invention discloses a method for domesticating cylindrospermum and application thereof. The method comprises the following steps of: preparing a specific culture medium; carrying out salinity tolerance domestication on the screened algaes; reducing the domestication of nitrogen and phosphorus contents; adapting to the domestication on the quality of water to be treated and the like; introducing the algaes into saline and alkaline land after gradual amplifying culture; reproducing the algaes in a large mount by using photosynthesis; absorbing and fixing nitrogen and phosphorus elements in the atmosphere and water sources; after reproduction, draining algaes breeding water; and depositing the algaes into soil, wherein the algaes contain a large amount of nitrogen, phosphor and other elements. After the algaes are primarily treated, the nitrogen in the soil is increased by 18-20 percent, the content of phosphor is increased by 11-13 percent and the content of all salts is reduced by 12-15 percent. The invention not only prevents nutrient elements by a washing method from being lost, but also prevents applied fertilizer from hardening soil and secondary pollution to the water source and the environment; and after multiple treatments, the soil fertility can be gradually enhanced, the soil restoration can be accelerated and the finally the aim of improving the ecological environment can be achieved.

Description

technical field [0001] The invention discloses a method for improving saline-alkali land and increasing soil fertility by using nitrogen-fixing blue-green algae, in particular to a method for treating saline-alkali land by using Cylindrosporium algae. Background technique [0002] Saline-alkali lands are widely distributed around the world, covering more than 30 countries on six continents. It is mainly distributed in India, Pakistan, Russia, South Africa and other countries, with a total area of ​​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 irrigated area, and the output of saline-alkali is reduced by more than 25% every year. Land salinization is an important part of land desertification, which seriously threatens the local agricultural and animal husbandry production, the prosperity and development o...

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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