How to spend summer safely in sea cucumber pond management

The cultivation of sea cucumbers is particularly important to control the temperature. how to spend the hot summer in the culture of sea cucumbers? Next, we will analyze it for you.

According to meteorological data this year, the strongest El Nino phenomenon in history is forming, which will cause floods in the south and drought in the north this year, while extreme high temperatures are very likely in the north, which will bring a serious test to the fragile sea cucumber aquaculture industry. Sea cucumber circle in summer, how to prepare for high temperature in advance, to avoid the loss of safe summer?

1. Change the bottom regularly to prevent bottom heat

The main causes of bottom heat are:

The main results are as follows: (1) continuous high temperature leads to the increase of overall water temperature, which makes it difficult for sea cucumbers to adapt to continuous high temperature and appear "floating ginseng" and "heatstroke".

(2) the transparency is as high as 1 meter or even at a glance to see the bottom of the pond, there are few algae in the pond, and the sea cucumber loses the natural barrier of algae shade and light or the water level shines directly on the bottom of the pond.

(3) oxygen consumption of organic matter at the bottom of the pond, decay of dead grass, dead moss and dead algae, anoxia at the bottom of the pond, and heat production by anaerobic fermentation of spoilage bacteria. It leads to a vicious circle of anoxia-fever-anoxia at the bottom of the pool.

(4) the water level is too deep (more than 1.8 meters), which leads to the formation of a thermocline in the pool water, which does not convect up and down, and the heat at the bottom cannot be released.

It is recommended that the water level be kept at 1.6-1.8 meters before the arrival of the high temperature period, and the sediment should be improved with deodorizing bottom modification or degradable bottom modification with granular oxygen every 10 to 15 days. The bottom is changed every 7 to 10 days during the high temperature period. If possible, it can be equipped with aerator or sprinkling particulate oxygen to prevent geothermal hypoxia. The pond with a smaller area can lower the bottom temperature on the shade net.

Second, moderate fertilizer and water

After using water natural 077 to control the moss, you can appropriately use fish and water to grow fast fertilizer type with water natural EM fertilizer water to cultivate algae, reduce the transparency and maintain the transparency at 30cm to 50cm. Reduce transparency by culturing algae to provide sea cucumber with summer shade and summer heat.

Third, water quality should be adjusted early and fine-tuned.

Entering the high temperature season, the water quality of the pond should be adjusted early, fine-tuned and detoxified regularly. Any product should not be used in sufficient or over-dose at one time. Therefore, the use of microecological agents in high temperature season should be a small number of times, which can not only ensure satisfactory water transfer and bottom protection effect, but also avoid the occurrence of phenomena.

During the period of high temperature, the dissolved oxygen, bacteria, algae and nutrients change frequently, the biomass increases continuously, and the ability of biological metabolism strengthens. With the continuous increase of water temperature, the sewage at the bottom of the pond is easy to float, the bodies of organic matter and algae increase, and it is easy to cause foam accumulation on the surface of the water. It weakens the permeability of the water, deteriorates the bottom of the water, and even smells in the downwind.

Recuperation plan: on the first day, a bottle of 3 mu is used for natural detoxification of water in the morning, 10 mu of water is stabilized in a bucket of natural EM, and a pack of 5 mu of deodorant type is used in the afternoon, and the improved bottom is sprinkled at the downwind of the pond and the four corners. The next morning the use of water natural EM a bucket of 15 mu, with a special package of natural water transfer of 5 mu, conditioning water color.

IV. Scientific exchange of water

Changing water is the most direct and effective way to improve water quality. The addition of fresh sea water can increase the dissolved oxygen in the water, reduce the concentration of metabolic waste, adjust salinity and pH, bring a large number of benthic diatoms and organic detritus, and improve the biological composition and structure of the pond water. to provide bait for some small-sized sea cucumbers that have not entered summer dormancy.

1. Increase the amount of water exchange. In the ginseng ponds in summer, on the premise of ensuring the relative stability of water temperature, salinity and other factors, if there is a tide with natural water conditions, the water should be inflowed mechanically every day without natural tide conditions, and the daily water exchange volume should reach more than 20%. Maintain a high water level of 1.5 to 2 meters to reduce the impact of light and high temperature on the pool water. However, in case of cloudy and windless weather for several consecutive days, the water level can also be appropriately reduced to facilitate convection up and down the pool water and prevent hypoxia at the bottom of the pool.

2. Observe the water quality in the sea area and the pool before changing water. If the sea water is polluted or there is a red tide and other adverse water quality conditions, do not enter the water blindly, especially pay attention to the fact that the water quality of the open sea is not clear after the rainstorm; in addition, the water quality of the pond can be changed less appropriately, and the water quality of the pond can be increased when deteriorating; we should also pay attention to avoid tidal head water and tail water as far as possible when receiving water.

3. The method of adding water and drainage is adopted to change the water, which can make the pool water in a micro-flow state, which is conducive to the diffusion of dissolved oxygen and prevent local hypoxia at the bottom and corner of the pool.

4. Prevent Rain Water from pouring back and drain the fresh water in the pond in time. First, drain about 1 / 3 of the original water before rainfall and then immediately add it to the highest water level; second, often check whether there is a passage for land Rain Water to enter the pond around the pond to prevent a large number of Rain Water from entering the pond. Third, when there is heavy rainfall, open the desalination gate and the desalination pipe in time to overflow the low salinity water of the surface layer from the top to ensure that the salinity of the upper and lower layers of the pool water is basically the same, so as to prevent the delamination of the pool water caused by the different specific gravity of the upper and lower water, so that the oxygen-rich water in the upper layer can not be transmitted to the bottom through vertical convection, resulting in anoxia at the bottom and an increase in the content of harmful substances such as ammonia nitrogen, hydrogen sulfide and nitrite.