CATDOLL : CATDOLL: What herbicide can be used to kill the reeds around the shrimp pond without affecting shrimp farming?

What herbicide can be used to kill the reeds around the shrimp pond without affecting shrimp farming?

Available;

Aquatic plants, waterweed, duckweed, and water hyacinth herbicide that does not harm fish, shrimp, or shellfish - Waterweed Cleaner

Rivers, lakes, reservoirs, ponds, water weed herbicides, water hyacinth herbicides - Waterweed cleaner

(500g/set (350g+150g).

.12 sets/pieces)

1 set per mu of water surface

Environmental management agent. Green, environmentally friendly and pollution-free

Kill when you see green, the effect is fast

Features:

It can remove harmful weeds in wetlands: such as rivers, lakes, ponds, aquatic cultivation, water grass, water hyacinth (water lily), water peanut, rice grass, river dragon, reed and all other aquatic plants, and it can eradicate and purify water quality.

Remove dryland weeds and all stubborn weeds: It can completely eradicate stubborn weeds such as annual and perennial weeds such as Cyperus rotundus, Purslane, Herba Lycopodii, Flavescentis (Solidago), Eupatorium adenophorum (Airplane grass), etc.

This product is a pure green environmental management agent. It is non-toxic and harmless to soil, water, air, human body, livestock, fish, shrimp, shellfish and aquatic mollusks, and does not pollute the environment.

Instructions for use:

Wetland weeds: Use 500g (1+1) of AB agent per mu of water surface, add 30-35kg of water. Spray on the water surface or the leaves of water hyacinths and other aquatic plants. The water hyacinths will take effect in 3-5 hours after the drug is applied, and all will dry up and die in 2-3 days. Other aquatic plants will stop growing on the same day. The effect will be seen in 1-3 days. It will start to spread to the roots of underwater plants in 7-10 days, causing them to rot and die. They will never grow again.

Dryland weeds: annual weeds, perennial weeds and shrubs, etc.: use 500ml of the agent and add 35-40kg of water

When weeds occur in the field, add water to the preparation, add a protective cover to the nozzle, lower the nozzle, and spray evenly from the head of the weed to the entire leaf surface. Sunlight can accelerate the weed control effect. Cloudy days or shade will delay the weed control effect, but it will not affect the efficacy. If it rains one hour after application, it will not affect the efficacy.

How to configure an oxygenator if you want to raise shrimp?

In the pond, in addition to shrimps consuming oxygen, zooplankton, benthic animals, phytoplankton, microorganisms, bottom mud and decomposition of organic matter all require oxygen. More than 90% of the dissolved oxygen in the pond water comes from the photosynthesis of phytoplankton, and less than 10% comes from the diffusion and transfer of oxygen in the air to the water body. The dissolved oxygen in the upper water of the pond is high, especially on sunny days, it can reach supersaturation, up to 15 mg/L, while the bottom water is very low, often less than 1 mg/L. At night, photosynthesis stops, even phytoplankton consumes oxygen, the dissolved oxygen in the shrimp pond continues to decline, and reaches the lowest point in the early morning. Shrimp hypoxia often occurs during the second half of the night to the early morning. The pond has a certain self-purification ability for shrimp excrement, which mainly relies on phytoplankton absorption and microbial decomposition (requires a large amount of dissolved oxygen). Working principle The main role of the aerator in improving the ecological environment of the pond is to increase oxygen in the water body. When the shrimp pond is hypoxic, turning on the machine can solve the shrimp hypoxia crisis and reduce the losses caused by affecting growth or even death. When the upper layer of water has high dissolved oxygen, the aerator is turned on on a sunny day. Due to the aerator's lifting of the water body and the circulation of the upper and lower layers, the dissolved oxygen in the middle and lower layers of the water body is continuously increased, and the dissolved oxygen distribution of the whole pond water tends to be uniform, and the water temperature tends to be consistent. This is conducive to the rapid growth of shrimp, reducing the feed coefficient; it is conducive to the oxidation and decomposition of organic matter; it is conducive to reducing the occurrence of diseases. In addition, the circulation of the water body also promotes the uniform distribution and reproduction of plankton, which is conducive to improving the primary productivity of the pond and the ability of phytoplankton to absorb ammonia nitrogen, nitrite, nitrate, etc. It can be seen that the role of the aerator is not only to increase oxygen to the water body, but also to effectively promote the improvement of the primary productivity of the pond and the greatly improved self-purification ability of the pond, thereby improving the water quality and ecological environment of the pond. Although the water circulation flow it produces is not suitable for the living habits of the breeding objects, it has a good effect on promoting the healthy and rapid growth of shrimp. Performance indicators The main performance indicators of the aerator are defined as oxygenation capacity and power efficiency. Oxygenation capacity refers to the amount of oxygen added to the water body by an aerator per hour, in kilograms per hour. Power efficiency refers to the amount of oxygen added to water by an aerator consuming 1 kWh of electricity, and the unit is kg/kWh. For example, the power efficiency of a 1.5 kW waterwheel aerator in a pump factory was 1.71 kg/kWh, which means that the machine can add 1.71 kg of oxygen to the water body by consuming 1 kWh of electricity; the oxygenation capacity is 2.59 kg/hour, which means that the machine can add 2.59 kg of oxygen to the water body per hour.

For example, if the oxygenated water volume is 1,000 cubic meters, it is equivalent to providing 2.59 mg/L of dissolved oxygen to the water body. It should be pointed out that in order to have a unified comparison benchmark, the test of the aerator is carried out according to the standard under the specified conditions (such as clean water, 20°C, a certain pool, and the dissolved oxygen in the water body starts from close to zero, etc.), which is different from the environmental conditions of the shrimp pond. In Southeast Asia, South America and other countries, shrimp ponds mainly use waterwheel aerators, and a small amount of push flow suction aerators.

They believe that these two types of aerators can generate circulation in shrimp ponds, which are suitable for the living habits and ecological environment of shrimps and are conducive to the healthy growth of shrimps. Due to the high density of shrimp farming, high temperature, high oxygen consumption rate, and easy deterioration of water quality, the proportion of waterwheel aerators is relatively large. A 0.75-kilowatt aerator is used for a smaller area, and 6 to 8 1.5-kilowatt aerators are used for a larger area. In the areas south of Zhejiang Province in my country, the aerators for shrimp ponds mainly use waterwheels, because waterwheel aerators increase oxygen faster and are conducive to energy saving. The proportion of waterwheel aerators in shrimp ponds in southern China is generally lower than that of foreign countries, but the proportion of waterwheel aerators in some high-yield shrimp ponds in some areas has reached or exceeded the foreign level, such as Hainan Province. The types of aerators used in shrimp ponds in other parts of my country are more diverse, including waterwheels, impellers, plug-flow suction, etc. Generally, the proportion of aerators is small, mainly to solve the problem of oxygen deficiency and floating heads in shrimp ponds. In recent years, in order to avoid the outbreak of shrimp diseases, many places have set up new demonstration test sites and test areas, changed the breeding mode of large-scale water changes, and taken many measures to improve the self-purification capacity of shrimp ponds and improve the ecological environment of shrimp ponds. Among them, increasing the proportion of aerators is one of the main measures. The proportion of aerator power in high-yield ponds (250 kg of shrimp per mu, or even higher) has reached 1 kilowatt per mu, achieving good economic benefits. Configuration suggestions The main considerations for selecting the configuration of aerators are water source conditions, breeding density, and total energy consumption for water inlet and outlet. Water source conditions: If the water source is abundant and the water quality has always been good, you can consider less configuration; otherwise, more configuration, and only change more water when the water source quality is good. If the breeding density (per mu yield) is high, more configuration is required, and if it is low, less configuration is required. Total energy consumption for water inlet and outlet: If the water inlet pump lifting time is very short, the head is small, the discharge is low, and the energy consumption is low, the aerator is less; otherwise, more configuration is required. Economic analysis: Consider the relative ratio of electricity prices and shrimp selling prices. If the local electricity prices are relatively high and the shrimp selling prices are relatively low, consider allocating less; otherwise, allocate more.

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Tidal flat pond farming is usually equipped with a waterwheel-type aerator with a power of 0.75-1.5 kilowatts for a farming area of ​​1-3 mu. The specific number and power model should be reasonably arranged according to the shrimp farming density. The placement of the aerator in the pond needs to be comprehensively considered according to the area and shape of the pond. It should be conducive to the uniform distribution of dissolved oxygen in the pond water, the promotion of water circulation, the normal feeding and activity of the farmed shrimp, and the farming management and operation. The aerator is a machine commonly used in the fishery farming industry. Its main function is to increase the oxygen content in the water to ensure that the fish in the water will not be short of oxygen. It can also inhibit the growth of anaerobic bacteria in the water and prevent the deterioration of the pond water from threatening the living environment of the fish. The aerator generally relies on its own air pump to pump air into the water to achieve the purpose of increasing the oxygen content in the water.

‍‍‍‍Aerator is a device that uses a power source such as an electric motor or a diesel engine to drive the working parts, so that the "oxygen" in the air is quickly transferred to the aquaculture water body. It can comprehensively utilize physical, chemical and biological functions, not only to solve the problem of fish floating due to lack of oxygen in pond aquaculture, but also to eliminate harmful gases, promote water convection exchange, improve water quality conditions, reduce feed coefficients, and increase fish pond activity and primary productivity, thereby increasing stocking density, increasing the feeding intensity of aquaculture objects, promoting growth, and significantly increasing per mu yield, fully achieving the purpose of increasing aquaculture income. There are many types of aerator products, and their characteristics and working principles are also different. The oxygenation effect varies greatly, and the scope of application is also different. Producers can choose suitable aerators according to the demand for dissolved oxygen in different aquaculture systems to obtain good economy.

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