Domestication method for microcoleus vaginatus and application thereof

Abstract

The invention discloses a domestication method for microcoleus vaginatus and application thereof. The method comprises the following steps of: preparing a special culture medium, performing domestications such as salt tolerance domestication, nitrogen-phosphorus content reducing domestication, adaptability to water to be treated and the like on the screened algae seeds, introducing the algae seeds into a saline-alkali land after gradual amplification culture, propagating a great amount of microcoleus vaginatus by using photosynthesis, wherein the microcoleus vaginatus absorbs and fixes nitrogen and phosphorus elements in the atmosphere and the water source; and draining the microcoleus vaginatus culture water after propagation, and depositing the microcoleus vaginatus in the soil, wherein the microcoleus vaginatus contains a large amount of elements such as nitrogen, phosphorus and the like. After one-time treatment of the method, the nitrogen in the soil is increased by 19 to 22 percent, the phosphorus is increased by 13 to 15 percent, and the full salt quantity is reduced by 25 to 30 percent; and the method avoids nutrient element loss caused by a washing method, avoids hardening of the soil and secondary pollution of the water source and the environment due to the application of fertilizers, can gradually enhance the soil fertility by multiple times of treatment, can accelerate soil recovery, and finally fulfills the purpose of improving the ecological environment.

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, and in particular relates to a method for treating saline-alkali land by using Microcoleum 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 devel...

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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