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Seek eel net box culture technology
1, what are the advantages of net box eel farming?

The use of net box eel farming has the following advantages: ① Smaller investment. General a bottom area of 10 square meters of the net box, the production cost of about 100 yuan, a one-time investment is not big, but also can be used for about 3 years. ② Convenient to carry out eel farming in fishing ponds. Set up in the fishing pond net box, eel and fish farming, can effectively use the water surface, as long as the reasonable arrangements, there is no obvious impact on the pond fish. The scale can be large or small. Net box culture can be based on their own conditions, the scale can be large or small. From one to hundreds or even more than a thousand, the investment of a few hundred dollars to millions of dollars can be. ④Easy operation and management. Because the net box only needs to transplant water plants, labor intensity is small, the usual culture is mainly feeding and disease prevention and escape prevention, management projects are few, simple and convenient. ⑤ Water temperature is easy to control. The net box is placed in ponds and other waters, the water body is large, the water temperature will not rise rapidly in the summer heat, and it is not easy to reach a high temperature of more than 30℃. (6) High survival rate of aquaculture. Net box culture due to fresh water quality, water temperature is more stable, so the survival rate of culture is higher.  2、How to make your own net box?

The materials used to make the net box are generally polyethylene mesh (also known as sieve cloth), which are usually sold in the place where wire mesh and window screens are sold. General price per square meter ranging from 2-6 yuan. Selection should pay attention to the selection of mesh smaller (to eel tail tip can not be inserted into the mesh is appropriate), mesh uniformity, fingernail scraping warp or weft threads, line tight and does not displace, pulling and rubbing hard, feel very solid can be selected. The net box is generally made into a rectangle or square, the bottom area of not more than 20 square meters is appropriate. The depth of the box is 1.2-1.5 meters (the general depth of 50 centimeters, 70 centimeters above the surface of the water to prevent the escape part). Cut the mesh according to the size of the net box, use high-quality nylon thread, and sew with a sewing machine or shoe sole machine. The upper edge of the net box rolled around the same time sewed into the pinky-thick nylon rope and leave the end of the rope to facilitate binding to the support.  3, which waters are suitable for the establishment of nets?

But where the water level drop is not large, good water quality and pollution-free, by floods and droughts do not have much impact on the water depth of 1-2.5 meters can be considered to set up the net box, static water or slightly flowing water can be. In all types of waters, the pond is the most suitable, followed by a stable water level of the river, lake and bay.  4, how many nets in the pond is appropriate?

The main factor limiting the number of nets set up in a pond is water quality. In general, the total area of static water ponds set up net boxes to not more than 30% of the total area of the pond is appropriate; ponds with flowing water, the net box area of up to 50% of the total area of the pond, but at the same time should be based on the following aspects of the situation and the comprehensive consideration of the area of the increase or decrease: pond water is good, easy to drain and replace the water can be set up more; ponds do not raise fish or fish can be set up more low-density; breeding of low-oxygen-resistant fish (eg, crucian carp) ponds The ponds with low oxygen tolerant fish (e.g. crucian carp) can be set up more. On the contrary, the establishment area of the net box should be moderately controlled.  5、How to place the net box is more reasonable?

In the scale of net box culture, generally two rows of net boxes and listed as a group, groups and groups to maintain a certain distance between the two rows of wooden boards or bamboo pieces built into a "springboard" for breeding personnel feeding and walking on patrol. Nets are divided into fixed nets and floating nets, general water depth of 1.5 meters within the pond, the degree of water level rise and fall is not large, you can consider setting up fixed nets, that is, to the bottom of the pond piling, and then tied to the pile on the bamboo poles or wooden rods, to support the net body. Water depth of 1.5 meters or more, the water level fluctuates, can consider the establishment of floating nets, that is, with used oil drums, tires, etc., the entire net box to float in the water, and take to the shore to pull the steel rope and other fixed. There are also separate net boxes, take small boats to observe and feed management.  6、What preparations should be made before casting eels into the box?

The net box used to raise eels should be placed into the pond in advance, which is conducive to the growth of algae and make the net cloth smooth, to avoid bruising the eel body. A large number of transplanted water plants into the box. The area of water plants should account for more than 80% of the water surface in the whole net box, and the water plants are closely laid without gaps. According to the volume of water in the box, each cubic meter of water with "eel treasure 1" 1 ml and "eel treasure two" 0.5 ml for sprinkling, including water plants on the side must be splashed to, to kill pests and diseases.  7、What is the density of net box eel farming?

Generally speaking, although the net box eel farming in Hunan Province had set a record of 53 kilograms of eels per square meter of high-density records, but the production plan of the first keeper is best to control the production of 10 kilograms or less is appropriate, and thus in the eel casting, we have to take into account the length of the period of our tentative, the possible increase in the weight of the other factors. If the feeding period is long, it is appropriate to put 1-2 kilograms per square meter, on the contrary, we can consider increasing the amount of eels. If it is only for winter storage, the density can be higher. Eels can be classified into boxes after observation and screening in the observation pool, and each net box is numbered, and a record is made of the input weight and the approximate number of tails in each net box. The number of tails is calculated as follows: randomly weigh 1-3 kilograms, count the number of strips and calculate the average number of tails per kilogram, and then multiply it by the total weight of the same specification that is put in.  8、How to set up the feeding hole for eel farming in net box?

In the net box put bamboo tube around the 1 square meter square "bamboo frame", or wood nailed wooden frame, let it float into the water. When the other water surface in the net box are densely packed with water plants, but leave a piece of the frame does not store, thus forming a visible bottom of the box in the box hole, we call it "feeding hole". Larger nets can have more than one feeding hole or even one in each corner. This "hole" is not only a feeding hole, but also an "observation hole" for us to observe the eel's feeding and activity. If the growth of water plants invade the "hole", it should be cut off in time to ensure that the hole plays a proper role.  9, net box eel farming how to put a good anti-escape customs?

The net box eel farming in the anti-escape requirements are particularly detailed, carelessness will cause loss of eel escape. ② net box before the water and then carefully check to see if there are holes or offline. ③ Fixed net box of wooden pillars and bundled ropes to be firm and strong, in order to prevent the net box was blown over by the wind and eel escape. ④Fixed net box should be inspected when water is added to the pond or in case of heavy rainfall to prevent eels from escaping due to the rise of water level. ⑤Cut the water plants along the box in time when they are too high. When it is windy, pay attention to the net box to see if it is destroyed by the wind. (7) Eliminate rats in time to prevent them from biting through the net box. (8) Prevent human damage. Due to the eel netting mesh is small, a large number of algae plants will block the mesh, so that the water exchange inside and outside the box is difficult. Therefore, the net wall should be brushed every month or as the case may be, and at the same time check whether the net box has broken holes.

10, how to deal with fish and eels *** in a pond when some of the contradictions?

The pond set up in the net box eel farming, eel discharged a large number of feces and residual bait will bring pollution to the pond water, resulting in a decline in dissolved oxygen in the water. If the pond is easy to change water or have an oxygenator, or stocking fish density is not big, then the impact is not big. In the absence of these conditions in the pond, the stocking of hypoxia-resistant fish, such as the selection of crucian carp as the main fish, can be a good solution to this contradiction. Pond water, the water level rises, pay attention to the water level to add water to the fixed net box will not escape the eel as appropriate, or raise the net box in time; pond drainage, the maximum is not "hanging box". Prevention and control of eel and fish pests and diseases, the application of drugs to fully consider the limits of the two types of fish medication, in order to prevent the occurrence of untoward.  11, net box eel farming in winter how to manage?

The net box temporarily raised eels, generally up to around the Spring Festival that has all been sold. The net box can be water, wash and dry, folded in a woven bag or sack, placed in the shade, avoid direct sunlight, prevent rats or corrosive chemicals damage, proper management, the net box can be used for more than 3-4 years. After the sale of eels in winter, if the net box is still placed in the pond, it should be completely submerged in the water to prevent damage caused by freezing. If the box eels need to be overwintered, it should be strengthened before stopping eating to cultivate and enhance the eel's physique. Cover the plastic film on the water plants to reduce the death of frost water plants, to maintain a good habitat for eels. For the northern frost-hit areas, greenhouse overwintering should be considered instead of overwintering in ponds.