Control formula and enforcement method aiming at enteromorpha harm during polyculture of shrimp, crab and shellfish

Abstract

The invention discloses a control formula and an enforcement method aiming at enteromorpha harm during polyculture of shrimp, crab and shellfish. The control formula aiming at enteromorpha harm during polyculture of shrimp, crab and shellfish comprises the following compositions by weight: 70%-95% of water-benefiting live baceria, 2%-25% of a composite algae source, and 0.1%-5% of vibrio invincible opponent, wherein the composite algae source is a mixture of an algae culturing agent named as Yuzaoyuan and an algae flourishing agent named as Zaowang with the ratio rato of 1:2-2:1. The invention also discloses a control method aiming at enteromorpha harm during polyculture of shrimp, crab and shellfish. Therefore, the technical scheme is capable of effectively controlling enteromorpha, reducing mortality of shrimp, crab and shellfish and enhancing life vitality of shrimp, crab and shellfish, and also helps to solve the pond water quality and sediment eutrophication problems, inhibit enteromorpha growth, eliminate multiple harmful bacteria in shrimp, crab and shellfish, and reduce content of harmful bacteria in water.

Description

technical field [0001] The invention belongs to the field of fishery, and in particular relates to a formula and an implementation method for preventing and controlling the harm of enteromorpha in the mixed culture of shrimp, crab and shellfish. Background technique [0002] Since the outbreak of the shrimp virus epidemic, the shrimp farming industry in seawater ponds has declined rapidly. So far, the shrimp virus disease has not been completely overcome, so as to actively explore the comprehensive utilization technology of seawater ponds. Shrimp, crab and shellfish polyculture is currently the main mode of comprehensive ecological breeding in seawater ponds. Enteromorpha, a large benthic algae, was not only the main killer of green algae in coastal waters of Qingdao in 2008, but also brought huge economic losses to seawater pond culture. The traditional treatment method is to prevent and control by herbicides. Although the short-term effect is obvious, it is easy to repeat...

AI Technical Summary

Problems solved by technology

Enteromorpha is a large benthic algae. It is not only the main killer of green algae in coastal waters of Qingdao in 2008, but also brought huge economic losses to seawater pond culture.

The traditional treatment methods are herbicides to prevent and control. Although the short-term effect is obvious, it is easy to repeat and treat the symptoms but not the root cause.

Moreover, with the frequent use of herbicides, Enteromorpha is prone to drug resistance, which makes farmers have to increase the dosage. If things go on like this, the treatment of Enteromorpha will fall into a vicious circle

[0003] The hazards of Enteromorpha in the polyculture of shrimp, crab and shellfish: First, it absorbs nutrients in the water body, inhibits the reproduction of planktonic algae, and seriously affects the growth of shellfish that mainly feed on benthic algae and organic debris; second, the large amount of Enteromorpha Breeding covers the cultured shellfish at the bottom of the pond, causing them to suffocate and die; third, other farmed fish, shrimp and crabs will also be entangled in algae and affect normal activities and die, reducing the survival rate; fourth, as the water temperature rises, High, the bottom Enteromorpha dies and rots, resulting in hypoxia at the bottom and a large number of toxic substances, resulting in red body disease and mass death of swimming crabs and prawns in breeding ponds