Water injection into the pond. To increase the stocking density of fish ponds, achieve the goal of high yield, in addition to remove silt, reasonable feeding fertilization, through to the pond water to improve dissolved oxygen conditions. According to past experience, more than 750 kilograms per mu of fish ponds, water 4-6 times per month; more than 1000 kilograms per mu, the monthly water 6-8 times. Usually when the color thick, transparency in less than 25 cm, when water quality is poor, we must promptly change part of the new water injection.

The use of aerator. Aerator with water, stirring effect. The use of the aerator is: in the morning, when the water is saturated with dissolved oxygen, oxygen plays a role; the afternoon, when the dissolved oxygen in water saturated, stir up the water, the upper and lower oxygen distribution balance. In addition, the aerator can also promote the sediment release of nitrogen, phosphorus and potassium nutrients, beneficial to the growth of plankton. Practice has proved that the use of the aerator is to improve water quality, fish pond high and high yield, effective way. Mainly to improve the water quality of high-yield fish ponds with water flooding, combined with the aerator, you can receive a large increase in yield effect. Irrigation inconvenience, difficult to use more water fish ponds aerator.

Improve primary productivity. Primary productivity mainly refers to the productivity of phytoplankton. And the main factors affecting the production of phytoplankton are light energy and nutrients. Phytoplankton photosynthesis is mainly in the upper water 34-66 cm, thus reducing the suspended particles in the water, increasing the transparency of water, the phytoplankton can absorb more light, is the key to improve the yield of. The general experience of reducing the suspended particles in water is:

A alum quantang poured, the suspended particle precipitation, the morning afternoon spilled alum, inject new water (in water over rich).

B urea whole pond.

C raw lime all pond splash.

The above method can make the suspended colloidal matter precipitation, increase transparency, to clarify the water, has a good effect to improve the productivity of plankton.

The often used lime. The pond is reasonably cast with lime, which can neutralize acid, stabilize pH value, improve water quality, and make the growth of plankton and fish. Lime can also make the suspended organic matter in the water to precipitate, to clarify the water quality, is conducive to the growth of fish. The quality of lime or calcium, directly as nutrients of aquatic plants, improve water primary production capacity. So the fish ponds, should be cast in a timely manner. In the pond mud excessive accumulation of organic matter in water, especially the humus concentration is too high, water turbid dark condition, use lime can make water sediment conditions turn. The application of lime mud under water can also contain nutrients gradually effectively, so much silt ponds, only applying lime, no other fertilizer, but also can obtain high yield.