A method for regulating the growth of furrow grass and promoting the cultivation of prawns

Abstract

The invention provides a method for regulating growth of an aquatic plant to promote prawn culture. The method comprises: step one, an aquatic plant is killed; to be specific, when the water temperature in a pond is at 10 to 15 DEG C, the aquatic plant growing at the length of 3 to 5cm and a killing drug is put into the pond; step two, rich water cultivation is carried out; to be specific, rich water cultivation is carried out on the water quality of a culture pond after 5 to 7 days of drug putting in the pond; step three, shrimp seedling putting is carried out; to be specific, shrimp seedlings are put into the pond after 10 to 15 days of aquatic plant killing; and step four, feeding is adjusted; to be specific, after shrimp seedling culture for 30 days, the prawns grow to reach the lengths of 5cm, the pond with the aquatic plant growing is observed, if aquatic plant growth at the bottom of the pond is observed or floating aquatic plant tender shoot existence on the surface of the pondwater and at the pond side is detected, feeding of the cultured prawns is stopped for three days and then feeding with the amount of 50% of the all-day normal amount is carried out in a next week. According to the invention, with mastering of the growth rule of the aquatic plant in the pond, time nodes for killing the aquatic plant in the prawn culture pond and culturing seedlings are mastered accurately. When the cultured prawns are able to eat the aquatic plant tender shoots, the aquatic plant is at the tender shoot stage; and the prawns are promoted to eat the tender shoots of the aquaticplant by reducing the feeding of prawns.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for regulating the growth of ditch grass and promoting prawn cultivation. Background technique [0002] Ditch grass is a large aquatic vascular plant that grows in seawater, and it is more common in tidal flat shrimp ponds. Ditch grass is a plant that relies on seeds for natural growth and reproduction. In the first ten days of April in early spring every year, the water temperature is 8°C-10°C. Under the conditions of light and suitable temperature, the seeds begin to develop embryos, and when the water temperature is above 12°C, sprouts sprout. With the rise of air and water temperature, when the water temperature is above 16°C, the ditch grass grows faster. In July, it grows branches and climbs all over the water area, and in August it blooms and bears seeds. [0003] Like other aquatic plants, ditch grass absorbs nutrients in the water body during it...

AI Technical Summary

Problems solved by technology

[0006] 1. The cost of pond dredging is high

The bottom of prawn farming ponds is generally cleaned every three years, and large-scale machinery is required for dredging, which takes a long time

[0007] 2. After killing ditch grass in early spring, ditch grass will grow again

[0008] 3. Killing when ditch grass is luxuriant will cause secondary pollution

If early killing is not carried out, when the ditch grass is luxuriant, the plant body has reached about 50cm, and it is difficult to remove it in time, and the decay of the plant body will pollute the water quality.

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