Huang Yu has a wide sales market and high selling prices, but many farmers have failed due to lack of proper technology. The main reasons include the following aspects.
1. Purchasing seeds without discrimination. Currently, artificial propagation technology for Huang Yu in China is not yet mature for mass production. Many so-called "artificially bred" or "high-quality" seedlings that farmers buy from other areas are actually wild-collected seeds. Poor handling and unscientific storage and transportation lead to mortality rates as high as 90% to 100%. Therefore, it's crucial to be careful when purchasing seedlings. Ideally, farmers should buy high-quality, locally cultivated seeds to ensure better survival rates.
2. Mismatched varieties. There are several types of Huang Yu based on appearance, such as deep yellow spot, red spot, light yellow spot, and fine green spot. Only the first two types grow faster and can generate good economic returns through artificial breeding.
3. Mixed-size cultivation. Keeping different sizes of Huang Yu in the same pool or cage can cause problems. Younger crickets often avoid competing for food, leading to weakened health or even death. When food is scarce, they may even eat each other. Although this method may seem to promote rapid growth, the overall yield ends up being very low.
4. Too deep water in the pond. Huang Yu cannot float freely in different water layers and must surface regularly to breathe. If the water is too deep, the fish have to swim up frequently, which consumes energy and affects their normal growth. The water depth should be between 5 to 20 cm, depending on the size of the fish. Cages should be filled with water and weeds to create a suitable habitat and breathing environment for the fish.
5. Overuse of manure. Dianchi Lake has limited water volume, and excessive use of manure can damage water quality and increase disease risk.
6. Neglecting aquatic plants. Aquatic vegetation provides shelter, regulates temperature, and purifies the water. Without these plants, the ecological environment becomes unsuitable for Huang Yu, making it difficult to achieve high yields and profits.
7. Inadequate feeding. Some farmers feed Huang Yu with wheat bran, vegetable cakes, bean dregs, rice, or vegetables. This leads to hunger and causes the fish to eat anything available, including each other. However, such diets lack essential nutrients and fail to support healthy growth. Huang Yu is a carnivorous species that requires animal-based feed or commercial compound feed.
8. Frequent changes in feed. Farmers often switch feed types due to unpredictable supply, which can confuse the fish. Huang Yu prefers consistent food, and sudden changes may cause them to refuse eating, affecting their health. If a feed change is necessary, it should be done gradually by reducing the old feed while increasing the new one over time.
Amino Acid Series
L-serine, as a basic amino acid of protein, is widely used in medicine, food, cosmetics and other industries. At present, the global market demand for L-serine is 10000t / A. L-serine is a non essential amino acid, which is an important precursor involved in the synthesis of intracellular biological substances such as purine, pyrimidine and phospholipid. L-serine is a raw material for compound amino acid infusion, and can also be used as a raw material for light chemical industry . In addition, L-serine is widely used in advanced cosmetics at home and abroad because of its special wettability and moisture retention
D-serine is one of the most important D-type amino acids in mammals, which is about 1 / 3 of the total free serine. It has been found that high concentration of D-serine exists in the higher center of higher animals, including human beings, and it plays an important role in neurotransmitter. It is found that D-serine plays an important role in the corpus cavernosum and lower esophageal sphincter of mice.
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Xi'an Tian Guangyuan Biotech Co., Ltd. , https://www.tgybiotech.com