Method for culturing litopenaeus vannamei in saline-alkali soil

Abstract

The invention discloses a method for culturing litopenaeus vannamei in saline-alkali soil. The method sequentially comprises the steps of preparation of a pond, clearing of the pond, nutrification of water, water introduction, fertilization, covering with a greenhouse, releasing of shrimp larvae, feeding and shrimp harvesting. The method is characterized in that the pond is prepared following the steps of firstly, site selection, wherein before site selection, testing is conducted, and measurements of the salinity higher than 0.05%, the calcium ion concentration higher than 80 mg / L and the magnesium ion concentration higher than 150 mg / L are required; secondly, building of the pond, wherein the rectangular pond with the area of 100-500 mu is selected, the length-width ratio is (1-2):(2-3), the depth of the pond is 1.5-1.8 meters, and the maximum water-storage depth is 1.2-1.5 meters. The pond bottom gradient meets the requirement that water in the pond can flow by itself to be drained, a water discharging system and a water inlet system of a farm are separately arranged, a small pond is built in a small reservoir at a water inlet of the rectangular pond according to the scale of (30-50):1, and the bottom of the small pond is 30 centimeters or above higher than the rectangular pond; an aerator is arranged. According to the method suitable for culturing the litopenaeus vannamei in the saline-alkali soil, the method can be suitable for culturing the litopenaeus vannamei in the saline-alkali soil, and the saline-alkali soil can be developed and utilized.

Description

technical field [0001] The invention relates to a method for cultivating prawns, in particular to a method suitable for cultivating Litopenaeus vannamei in saline-alkali land, and belongs to the technical field of cultivating shrimp in saline-alkali land. Background technique [0002] China is a big country for Litopenaeus vannamei farming. It has become an important species of shrimp farming in China since 1999. It has developed rapidly in the three southern provinces and has become the most popular shrimp species in the country with the largest output. While the production is developing rapidly, there are Serious problems such as uneven quality of seedlings, virus carrying and slow growth have been identified, which directly threaten the sustainable development of China's Litopenaeus vannamei aquaculture industry; since 2017, southern Hainan, Guangdong, Guangxi, Zhejiang, Jiangsu and other provinces have The success rate of breeding has dropped sharply, and the total outpu...

AI Technical Summary

Problems solved by technology

[0002] China is a big country for Litopenaeus vannamei farming. It has become an important species of shrimp farming in China since 1999. It has developed rapidly in the three southern provinces and has become the most popular shrimp species in the country with the largest output. While the production is developing rapidly, there are Serious problems such as uneven quality of seedlings, virus carrying and slow growth have been identified, which directly threaten the sustainable development of China's Litopenaeus vannamei aquaculture industry; since 2017, southern Hainan, Guangdong, Guangxi, Zhejiang, Jiangsu and other provinces have The success rate of breeding has dropped sharply, and the total output has dropped rapidly from 1.2 to 1.5 million tons in 2012 to more than 500,000 tons in 2017, and recovered to more than 600,000 tons in 2018; Penaeus vannamei has been successfully cultured in inland areas such as Heze in Shandong and Boxing in Binzhou, but the aquaculture area has not been rapidly expanded due to the breeding methods; the area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares is in China, which is far larger The area of ​​marine aquaculture ponds in the country is 130,000 hectares; if a culture model suitable for the special ecosystem of saline-alkali land can be found, it will be of great significance to increase the total output of Litopenaeus vannamei and provide high-quality protein for Chinese people; plants in saline-alkali land are difficult to survive and need to be developed Utilization; saline-alkali land can be divided into light saline-alkali land, moderate saline-alkali land and heavy saline-alkali land in the process of utilization; light saline-alkali land refers to its salt content below 3‰; heavy saline-alkali land refers to its salt content exceeding 6‰; The middle piece is moderately saline-alkali land, expressed in terms of pH value: the pH value of mild saline-alkali land is 7.1-8.5, the pH value of moderate saline-alkali land is 8.5-9.5, and the pH value of severe saline-alkali land is above 9.5; saline-alkali land is saline land and alkaline land The general term of saline land mainly refers to the salinized soil with high chloride or sulfate content, the soil is alkaline, but the pH value is not necessarily high; alkaline land refers to the soil containing carbonate or heavy phosphate, the pH The value is higher, and the soil is alkaline; in the prior art, there is no suitable method for cultivating prawns in saline-alkali land