In the process of crayfish farming, the high temperature season for the management of aquatic weeds is mainly transplanting, salvage, and cleaning work, in this process, I believe there is a phenomenon that has been ignored by many farmers and friends, that is, the phenomenon of floating grass of aquatic grass. The so-called aquatic grass floating grass phenomenon refers to the phenomenon of the rhizome of the aquatic grass floating to the surface of the water during the high temperature season, and there is more than one reason for its formation, which I will introduce in detail next. High temperature aquatic grass floating grass has a great harm to the normal growth and reproduction of crayfish, which will pollute the water quality, lead to lack of oxygen in the water body, and destroy the ecological balance of the water body, so for farmers, it is necessary to find a way to solve the problem of high temperature aquatic grass floating grass, which is convenient for the healthy growth of crayfish.
<h1 class="pgc-h-arrow-right" > high temperature aquatic grass floating grass? </h1>
1, aquatic weed aging: due to seasonal reasons, resulting in some specific aquatic weeds can only grow within a specific temperature range. Typical examples are Elastane and water hyacinth, the former belongs to cold water weeds, the latter belongs to high temperature aquatic weeds. Elezae has fully entered the mature stage after the high temperature in May, at this time if the water temperature is too high, the algae will naturally age and die, as a submerged aquatic grass, after the rhizome is aged and atrophied, it will float up and form a floating grass phenomenon. In the same way, when entering the autumn, when the temperature and the temperature difference between day and night are getting larger and larger, the water hyacinth also gradually enters the aging period, the rhizomes and leaves gradually age, and after loosening out of the soil, they will gradually float up to form a floating grass phenomenon. There are also aquatic plants such as water peanuts and purslane that have also appeared in the ring ditch in this season. The reasoning is the same as before.
2, PanTang: Pantang refers to the hypoxic floating head of fish and shrimp. But if you look at the root cause and the source. Or because of the algal phase of the algae in addition to the problem, coupled with the aquatic grass floating grass, gradually aging and death, on the one hand, the ability to produce oxygen declines, and the process of decay will consume a large amount of dissolved oxygen of the water body, in this case, there will be a phenomenon of fish and shrimp pan pond.
3, the water temperature is too high: the water temperature is too high is also an important reason that affects whether the aquatic grass is floating grass. Excessive water temperature will lead to the surface of the aquaculture water body and the bottom water body air pressure contrast, if the water eutrophication at this time is more serious, with the loosening effect of the bottom bubble, the rhizome of some aquatic plants will float up with the bubbles, thereby forming the floating grass phenomenon. This applies to all aquatic plants, not just the eleidate that sinks into the water.
After the aquatic grass floating grass, sometimes the rhizome is still white, the disease is not the same as the usual aging of aquatic grass, it is yellow root and black root, so some farmers and friends feel that there is nothing to do, will be neglected management, but if not managed, these aquatic grasses will soon age and rot, pollute the water quality, affect the growth and reproduction of crayfish, so before understanding the solution, we must first find out what destructive effects these aquatic grass floating grass has on the culture of water bodies and crayfish, and then it is good to prescribe the right medicine.
<h1 class="pgc-h-arrow-right" >what are the negative effects of high temperature aquatic grass floating grass on the growth and reproduction of farmed water bodies and crayfish? </h1>
1, increase the oxygen consumption of water: even if the floating grass water grass did not die or even die at that time, but the rhizome is separated from the soil, even if the tetraelian algae and water hyacinth, in high temperature weather, will die. After death, these aquatic plants can not produce oxygen for the water body, and at the same time consume a large amount of dissolved oxygen in the process of decay and degradation. That is to say, after the aquatic grass floats water, it is not only unable to produce oxygen, but will consume a large amount of dissolved oxygen in the water body.
2, leading to crayfish poisoning death: these floating grass aquatic grass in the process of decay, will consume a large amount of dissolved oxygen, resulting in serious hypoxia of water, unit area, anaerobic state, aquatic grass decay will degrade a large number of harmful substances, such as molecular state of ammonia nitrogen, nitrite and hydrogen sulfide and other harmful substances. These substances can directly pollute the water quality, but also the nervous system of the crayfish toxic effect, resulting in slow movement of the crayfish, the desire to eat decreased. The most direct manifestation of the eventual death is that the water in this area smells very smelly and looks very black.
3, easy to lead to local water eutrophication: where the floating grass, the water body will appear eutrophicated state, which is commonly referred to as oil film water and bubble water, these water quality dull content and nitrite concentration generally exceed the standard, can directly poison the crayfish in this area.
Understand the harm of floating grass, farmers are good at targeted management, how to solve, the specific idea of how to ask friends to continue to read.
<h1 class="pgc-h-arrow-right" > How to effectively solve the phenomenon of high-temperature aquatic grass floating grass?</h1>
1, salvage aquatic weeds: salvage aquatic weeds is the most direct and reliable method, the floating grass floating out of the water to salvage one by one, so as not to soak in the water, cover the water surface to affect the normal growth and reproduction of crayfish. At the same time, it can also be arbitrarily avoided from polluting the water quality after the decay of aquatic plants, causing the death of crayfish poisoning lesions. However, it should be noted that this method belongs to the method of treating the symptoms rather than the root cause.
2, water level regulation: it should be noted here that the floating grass phenomenon usually occurs in the high temperature season, the light is strong, the water vapor evaporates quickly, and the circulating water is frequent, so the high water level will aggravate the pressure difference between the bottom and surface of the aquaculture water body, so in this case, the water level should be slightly reduced in the place where there is more floating grass, so that the floating grass phenomenon brought about by the pressure difference can be effectively balanced. It is also important to emphasize that the high water level needs to be guaranteed during the high temperature season, which helps to regulate the water temperature and avoid the low water level from affecting the growth and reproduction of crayfish. So in order to compromise, I think that slow water change can be achieved by way of inlet and outlet water, so that the water cycle can be realized and the purpose of temporary regulation and change of water level can be achieved.
3, conditional clear pond: the essence of floating grass or water quality problems, high temperature season is the result of eutrophication of water bodies. Therefore, at this time, I recommend using a small amount of quicklime and toner to achieve the effect and purpose of disinfection and sterilization of organic matter. The purpose of adding toner is to prevent harmful gases such as hydrogen sulfide ammonia and other gases in the daughter-in-law's water body from floating and causing floating grasses to appear. Of course, toner also has a deodorizing effect.
<h1 class="pgc-h-arrow-right" > afterword:</h1>
High temperature Elexa is the most prone to floating grass, because it belongs to cold water weeds, which everyone understands. However, at the same time, some high-temperature aquatic weeds will also appear floating grass phenomenon, the reason may be that the aquatic weeds are not treated in time after decay, resulting in a serious decline in the transparency of the water body, unable to carry out effective photosynthesis, in this case, crayfish farmers should implement undifferentiated pond patrol management, found that there is floating grass phenomenon, minutes in time to deal with.