Cultivation of muddy seedlings

Muddy is known as “Ginseng in Water” and its taste is delicious. The meat is tender and nutritious. It also has high value in medicine and is one of the important aquatic products exported by China. Mudworm has become an important aquaculture species because of its strong adaptability, low disease, high survival rate, strong fertility, convenient transportation, and easy access to feed.
Pond conditions: seedling cultivation to earthen pond is better, an area of ​​30-100 square meters is appropriate, pool depth 40-60 centimeters, the pool excavation fish slip, in order to facilitate its habitat and summer cold, pond pool bottom ramming, into, Drainage ports are set to block nets, 15-20 cm of silt layer is laid on the bottom of the pool, duckweed is put in the pool, covering an area of ​​about 1/4 of the total area.
Qingtang Pei water: In the first 10 days after the seedlings are planted in the lower pond, 20-30 kg of quick-lime water clear pond is used for disinfection. After disinfection 300-400 kilograms of decomposed human and animal manure were used as base fertilizer to control water, and the water was added to 30 cm. After the water turns green, the seedlings can be placed after 15-20 centimeters of transparency.
Seed stocking: The seedlings will eat on the 2nd day after they are filmed. They will be fed for 3-5 days. The body length will be about 7 mm. The yolk sac will disappear. The camp will be fed with exogenous nutrition and can swim freely. At this time, the fish can enter the breeding stage. . The stocking density of seedlings should be 800-1000 tails per acre, and the microfluidic conditions can be appropriately increased. Note that the same batch of seedlings of the same batch hatch size should be stocked in the same pool to ensure balanced seed growth and improved survival.
Feeding and management: The seedlings that have just been in the pond have strong selectivity for feed. Therefore, it is necessary to cultivate suitable feeds such as rotifers and small phytoplankton. After filtering with a standard sieve of 50 mesh, they are fed along the pool side and properly fed and cooked. Egg yolk, fish meal, milk powder, bean cakes and other concentrates. When the seedlings reach 1 cm in length, they can take in food such as insects, insect larvae and organic debris. They can use boiled bran, bran, corn flour, wheat flour and other vegetable feedstuffs to mix minced fish, shrimp and snails. Animal feed such as quail meat is fed 3-4 times a day. At the same time, the proportion of formulated feed is gradually increased in the feed to gradually adapt to the artificial compound feed. Feed should be placed on a food table about 5 cm from the bottom of the pool. Do not cast it. The initial daily feeding amount was 2%-5% of the total weight of the seedlings and 8%-10% of the latter period. Mud fertilizer and fertilizer, should be timely recovery of fertilizer materials, can be applied chicken, duck manure and other organic fertilizer, immersed in water in a woven bag; can also be applied fertilizer, water temperature can be applied when the ammonium nitrate is low, the water temperature can be applied at a higher Urea. Water quality management should be done in a timely manner, new water should be added in time, and water quality should be adjusted. When feeding for more than one month, the seedlings are 3-4 cm in length, and they can be turned into aquaculture when they begin to drill mud habits.

Everything You Need To Know About LED Lighting

LEDs are a simple invention with huge potential to change the lighting industry for the better. Don`t know much about them? Here are three big things you need to know to get your feet under you:
1.What Does LED Stand For?

2.LED stands for light-emitting diode.

A diode is an electrical device or component with two electrodes (an anode and a cathode) through which electricity flows - characteristically in only one direction (in through the anode and out through the cathode). Diodes are generally made from semi-conductive materials such as silicon or selenium - substances that conduct electricity in some circumstances and not in others (e.g. at certain voltages, current levels, or light intensities).

1.What is LED Lighting?
2.A light-emitting diode is a semiconductor device that emits visible light when an electrical current passes through it. It is essentially the opposite of a photo-voltaic cell (a device that converts visible light into electrical current).
Did You Know? There is a similar device to an LED called an IRED (Infrared Emitting Diode). Instead of visible light, IRED devices emit IR energy when electrical current is run through them.

1.How Do LED Lights Work?

2.It`s really simple actually, and very cheap to produce, which is why there was so much excitement when LED lights were first invented!

The Technical Details: LED lights are composed of two types of semiconducting material (a p-type and an n-type). Both the p-type and n-type materials, also called extringent materials, have been doped (dipped into a substance called a [doping agent") so as to slightly alter their electrical properties from their pure, unaltered, or [intrinsic" form (i-type).
The p-type and n-type materials are created by introducing the original material to atoms of another element. These new atoms replace some of the previously existing atoms and in so doing, alter the physical and chemical structure. The p-type materials are created using elements (such as boron) that have less valence electrons than the intrinsic material (oftentimes silicon). The n-type materials are created using elements (such as phosphorus) that have more valence electrons that the intrinsic material (oftentimes silicon). The net effect is the creation of a p-n junction with interesting and useful properties for electronic applications. What those properties are exactly depends mostly on the external voltage applied to the circuit (if any) and the direction of current (i.e. which side, the p-type or the n-type, is connected to the positive terminal and which is connected to the negative terminal).
Application of the Technical Details to LED Lighting:

When a light-emitting diode (LED) has a voltage source connected with the positive side on the anode and the negative side on the cathode, current will flow (and light will be emitted, a condition known as forward bias). If the positive and negative ends of the voltage source were inversely connected (positive to the cathode and negative to the anode), current would not flow (a condition known as reverse bias). Forward bias allows current to flow through the LED and in so doing, emits light. Reverse bias prevents current from flowing through the LED (at least up until a certain point where it is unable to keep the current at bay - known as the peak inverse voltage - a point that if reached, will irreversibly damage the device).

While all of this might sound incredibly technical, the important takeaway for consumers is that LEDs have changed the lighting landscape for the better, and the practical applications of this technology are almost limitless. To learn about why LEDs might be a good fit for your business.

LED Lighting

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