Method for adjusting and controlling algal facies and water quality of aquaculture pond in situ

Abstract

The invention discloses a method for adjusting and controlling algal facies and water quality of an aquaculture pond in situ. The method comprises the following steps: a, kieselguhr powder with particle size of 200-1000 mesh is selected, and a compound microbial preparation is selected, wherein the bacterial population in 1 ml of the compound microbial preparation is greater than or equal to 100 million; b, when a base fertilizer and rich water are started to apply in the pond, the kieselguhr powder and the compound microbial preparation both obtained in step a are sprayed in the pond; c, after 15-20 days, the dissolved oxygen concentration and the ammonia concentration in the pond water are maintained at 5-9 mg / L and 0.1-0.4 mg / L respectively, the pond water is sandy beige, and the pond algal face is mainly alga of bacillariophyta observed through a microscope; d, offspring seeds of a to-be-cultivated target are put in the pond. Through the way, the method, disclosed by the invention, can improve the using effect of the microbial preparation commonly used in aquaculture, effectively adjusts and controls algal facies and water quality, reduces occurrences of diseases, and improves cultivation quality and quality of aquaculture products.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for in-situ regulation and control of algal phase and water quality in aquaculture ponds. Background technique [0002] Microalgae is the primary producer in the aquaculture pond and occupies an important position in the aquaculture pond. Microalgae increase the dissolved oxygen content in the aquaculture water through photosynthesis, and can absorb toxic substances such as ammonia nitrogen and nitrite nitrogen in the water body. It plays an important role in the normal function of the ecosystem of the culture pond, stabilizing the environment of the culture pond, and can also be used as a natural bait for shrimp seedlings. Therefore, pond culture needs to cultivate algae as part of the bait during the growth stage of the aquaculture target seedlings, and algae can help stabilize water quality. In the process of high-density aquaculture, due to the various fertilize...

AI Technical Summary

Problems solved by technology

In the process of high-density aquaculture, due to the various fertilizers used in pond fertilizer and water, it is impossible to cultivate dominant algae such as diatoms, golden algae, and yellow algae that aquatic animals like to eat. At the same time, due to the diversification of pond algae competition, Harmful blue-green algae outbreaks may occur in some high-density aquaculture ponds, resulting in slow growth of aquaculture objects and low aquaculture output

At present, there is a method of pre-enlarging the dominance of algae in the aquaculture pond and then introducing it into the aquaculture pond for cultivation (patent number: ZL200810198309.0), but this method requires high-quality algae inoculation and pre-expansion cultivation , the vast majority of farmers do not have facilities for algae species preservation and pre-expansion cultivation, which is difficult to promote and implement in farming practice

In addition, the water quality of high-density aquaculture ponds is very easy to deteriorate. It is necessary to frequently inject compound microbial preparations to control water quality, which increases the cost of farming and makes farmers reluctant to use more compound microorganisms, resulting in unstable water quality control and frequent occurrence of diseases, resulting in aquaculture risks. increase