Lotus roots and loach can also complement each other. Nowadays, many techniques are used together, and the breeding mode is becoming more and more popular with the development of science and technology. The efficient ecological breeding techniques of lotus root and loach are one of them. I want to learn to understand farmers’ friends and come over and see. Let's go.
1 Construction of lotus pond
The lotus pond should be selected in a place with sufficient sunshine, convenient drainage and irrigation, and flood control and flood control. The depth of the cement pool is controlled between 100 and 120 cm, and the water depth is controlled between 20 and 30 cm. An escape net is installed at the inlet and outlet to prevent the mud from fleeing. The thickness of the soil in the cement pool is generally 30 to 40 cm. It is best to use river pond mud or paddy soil, or garden soil of vegetable land. The fertilizer is mainly composed of decomposed chicken manure and cow dung.
2 planting and stocking
It is advisable to choose a variety of high yield, fast growth, no damage, and disease resistance, and the planting density is controlled between 2 250 and 3 000 kg/hm 2 . After planting, 20 mg/kg quicklime was used for splash disinfection. After 7 days, new water was injected into the pool, and the water depth should be controlled between 30 and 40 cm. In order to fertilize the water quality, the fermented organic fertilizer 3000 kg/hm 2 can be applied in the pool to provide biological bait for the loach. The seedlings should choose individuals with good spirits, well-proportioned body and fresh body color, with a specification of 4~6 cm, so as to ensure that the products can be cultivated in the same year. Be sure to soak and disinfect with 3%~5% salt water before stocking. The delivery time is from early May to mid June. The stocking density is 450,000 to 600,000 tails/hm 2 .
3 daily management
3.1 Feeding
Feeding is based on the principles of quantification, quality, positioning, and timing. Quantitative: The daily feeding amount is controlled at 4%~7% of the total weight of the loach seed. Qualitative: to ensure that the feed composition is relatively constant, and the palatability is fresh, avoiding feeding the spoiled feed. The first 15 days after the seedlings were placed, the powdered or paste-like compound feed was mainly fed; after 15 days, the compound feed was mixed, and the compound feed was mainly made up of plant feed and animal feed, of which plant feed: animal feed =6:4; the proportion of animal feed should be increased in the middle and late breeding period to promote the growth of the pupa. Positioning: feeding the feed at a fixed position, using a woven bag as a raw material in the field ditch to set up a loach table, about 5 cm from the bottom of the pool, with a diameter of 30~40 cm, as a fixed feeding place. Timing: Feeding once in the morning and afternoon respectively, it is advisable to feed in 1~2 h, and control the feeding amount reasonably to avoid indigestion caused by gluttony. The daily feeding amount of loach should be adjusted at any time according to weather conditions, water quality, etc.
3.2 Three look
"Three look" specifically refers to the weather, the water quality, and the growth. During the breeding period, you should adhere to the daily cruise pool, pay attention to observe the weather, water quality and muddy growth. In terms of weather, due to the cover of the lotus leaf, the water temperature in the Dianchi Lake is generally not too high. However, when the water temperature in the Dianchi Lake is high during the summer, the water temperature needs to be adjusted in time to prevent the water temperature from being too high and affecting the normal growth of the muddy. In terms of water quality, in order to prevent the deterioration of water quality, new water should be added to the culture pond. If the water becomes brown, the water should be changed immediately. At the same time, the organic fertilizer should be used to fertilize the water regularly. In terms of the growth of the loach, it is necessary to adjust the breeding management plan in time according to the observed growth of the loach to ensure the healthy growth of the loach.
3.3 Observation of the pool
The diligently patrolling pool can detect the abnormal situation in the pool in time, so that it can be dealt with in time to reduce the loss. In particular, it is necessary to do a good job of preventing the escape of muddy, and strengthen the inspection during heavy rain to prevent the muddy from escaping with the water. At the same time, check the eating situation and water quality of the loach every day, and make a good breeding record.
3.4 Do a good job in disease prevention and control
Lotus root application should use high-efficiency, low-toxic and no residue pesticides. At the same time, it is necessary to strictly control the dosage of the drug and follow a reasonable drug concentration. Generally, the loach disease is less, and the main diseases include printing disease, red skin disease, rotten fin disease, etc., and can be prevented by spraying 2 mg/kg of bleached powdered water or quicklime water of 225-300 kg/hm 2 or 0.5 mg/kg of copper sulfate.
3.5 Prevent water birds from stealing food
In recent years, migratory birds dominated by egrets have become the main stealing species in loach farming. If not protected, it can steal most of the mud from the pond throughout the breeding season. In order to carry out effective protection, it is necessary to cover a nylon net with a net eye of 5 cm × 5 cm above the pond, and the height of the net is preferably about 2 m above the ground.
4 timely fishing
It can be caught in the ground cage around November of the muddy dormancy. At this time, the water temperature is about 15 °C, and then it is kept in a small net cage. When the market price is high, it can be sold, or it can be dredged for fishing in the spring of the next year. However, the disadvantage is that manpower is expensive.
5 Conclusion
The muddy body is long in shape, rich in mucus, smooth and scaleless, and its special body shape makes it grow in the field without being damaged. In addition to the production of lotus root, other abundant natural resources can be fully utilized by the mud. At the same time, the loach can swallow pests and breathe through the loose soil. The muddy feces can also be used to fertilize the fields, which is conducive to the growth of lotus roots.
In recent years, some farmers in the fishery station of Bahu Town, Hedong District, Linyi City used chicken manure, pig manure and cow dung to cultivate the breeding mode of fly maggots, which not only reduced the cost of breeding, but also produced more muddy lotus roots. The taste is also better.
Article source: "Modern Agricultural Science and Technology"
Author: Hu Jian
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The total viral nucleic acid extraction kit is suitable for extracting total viral nucleic acid from serum, plasma, tissue homogenate and other samples. The kit is based on silica column purification technology, which eliminates the need for toxic phenol-chloroform extraction and time-consuming alcohol precipitation. This product has successfully extracted nucleic acids from hepatitis B A/C, hepatitis C, and norovirus standard. The obtained DNA/RNA can be directly used in a series of downstream experiments such as PCR, RT-PCR, and LAMP.
Notice:
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2. Dissolve Proteinase K (20mg/ml): Add Proteinase Dissolve Buffer to dissolve Proteinase K to a final concentration of 20mg/ml. Proteinase K dry powder can be stored at 2-8°C for one year, but dissolved Proteinase K must be stored in aliquots at -20°C. Repeated freezing and thawing of Proteinase K can affect its activity.
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