Crabs from shell to shell, you should know these things
It has been a few days since the shell of a crab has been shelled. Now, finally, it is necessary to reveal its true colors. However, after the shell of a crab has been shelled, are you really prepared? How will we deal with the unexpected situation? This article will summarize the problems faced by the shell from the shell to the second shell, to help you make a reference.
1Fertilizer water during the shelling of crabs
Recently, I have often heard people ask: “Can you get fat during the shelling?” Under normal circumstances, I will ask: “Why not?” But I rarely give an explanation. Today, here, I will briefly analyze the advantages of fertilizer and water during shelling: First, the fertilizer is algae, algae provides not only dissolved oxygen (of course, there is usually no oxygen deficiency in the pre-culture period), and sugar Nutrients, which are beneficial to the absorption of crabs and help them gain energy during shelling; the weather in February and April is variable and the temperature is uncertain. In the process of growth, organisms are often accompanied by an effective accumulated temperature. When the temperature is accumulated to a certain extent, the organism can grow and develop. The same is true for crab shelling. When there is enough fat in the water, the accumulated temperature during the day will be preserved at night and will not be lost. This will provide enough accumulated temperature for the shelling of the crab and speed up the shelling.
2Calcium supplementation during the shelling of crabs
"Calcium supplementation", recently everyone has been dizzy by the bombardment of these two words. Is calcium really important? Yes, that's how important it is. In fact, calcium supplementation, the most intuitive is: upgrade specifications and shell weight. At the same time, calcium supplementation can also make river crabs reduce stress and improve immunity in rainy days. Shelling has a profound effect on the growth and development of crabs, so it is best to divide the calcium into two parts: it is found to be shelled and a lot of shelling. It was found that the use of water-century calcium supplement (ionized calcium) during shelling increased the calcium content in the water body, so that the river crab could be slowly absorbed; in the case of large-scale shelling, the emergency hard shell spirit (calcium gluconate) was used with gold polysaccharide, and the water preparation was used. Calcium and multi-nutrient nutrition can quickly absorb crabs and accelerate the pace of shelling.
3Moss prevention and control
The problem of moss has been a headache in the early stages of river crab farming. Especially in the period of shelling, killing can not kill, then how to deal with it? The method we mentioned here still needs to control the moss. The best choice of fertilizer water is nano black gold and Wujin cream. It can not only cultivate small algae to inhibit moss, but also inhibit the moss through shading. Waiting for the shelling period, then you can see the situation: If there is a lot of moss in the whole pond, it is recommended to use the moss net to kill the moss, and most of the moss can be salvaged before killing the moss, the effect is remarkable. If there is only moss on the grass head, it is recommended that the moss and mud be directly scattered on the grass head, without the need for full pond splashing. When the moss dies, detoxification is carried out.
Due to the harsh weather in the early days, this year's pests came earlier. And just right, rushed out during the shelling period. Then the question comes: Does the bug kill more or not? Is there a bug in the pond that should not be fat? First of all, everyone knows that you can't kill insects during shelling, so you should always give a control method: light trapping method. Light trapping, that is, hanging lamps at the downwind to attract insects, and then pumping water to filter. Although the light trapping and palliating is not a cure, at least it can slow down the urgent need. Secondly, if there are a small number of worms in the mouth of the pond, it can be fat, but the duration of the water is relatively short. If there is a worm in the mouth of the pond and it has caused white water mixing, no matter how much water is used at this time, the worm will only grow more and more.
In short, this year's one shell to two shells is a relatively difficult transition period. Many ponds have to kill moss and kill insects. To deal with these two problems, it is necessary to make a quick decision after a shell. After the drug is killed, it is necessary to start detoxification and water and fertilizer to lay a solid foundation for the second shell.
Organizing Committee: Fujian Huiyuan International Exhibition Co., Ltd.