Three methods for rapid fattening of crabs
First, a reasonable change of water, to maintain the quality of water in the summer pond breeding disease prevention and treatment medication, it is inevitable there are some residual substances, to the autumn to constantly change new water, prevent pool water deterioration, to maintain the transparency of the pool of water, the general crab pond Above 35 cm. Changing the water is best done before the last shelling of the crabs. It will not only improve the water quality, but also make the crabs shell out neatly and smoothly. Change the water every 10 days or so, and change the amount of water at least 30% of the total.
Second, reasonable feeding, to ensure adequate nutrition Crab fattening period is best to feed the protein content of more than 32% of the crab special material, the amount of daily feeding is about 10% of the total amount of crab, the actual production to feed 2 ~ After 3 hours of basic eating, the amount of daily feeding will gradually decrease as the temperature and water temperature gradually decline. Feeding time is usually dominated by early evening and supplemented by early morning.
Third, rational application of pesticides, to ensure physical health Crab fattening period of the prevention of pests and diseases must be perseverance, prevention in the end, especially for the prevention of ciliate disease, we must take "eliminate" and "internal" combination of methods to prevent the occurrence of pests and diseases . Can be used in the crab after the last shelling 10 days with chlorine dioxide and other drugs Quanchiposa 1, can be added in the feed to prevent disease treatment of crabs with drugs and bait feeding, and even feed 5 to 7 days.
Plant extract is a product formed from plants as raw materials, through physical and chemical extraction and separation process according to the needs of the use of the final product extracted, to obtain and concentrate one or more active components in plants in a directional way, without changing the structure of the active components.
Proportional extract is the extract, liquid extract or powder made by the extraction and concentration of raw materials such as plants and animals. The number of raw materials before extraction and the mathematical ratio of the product after extraction and concentration generally do not have very clear composition and content.
1. According to the content of active ingredients, it can be divided into three types: effective monomer extract, standard extract and ratio extract;
2. Divided into glycosides, acids, polyphenols, polysaccharides, terpenoids, flavonoids, alkaloids, etc.
3. According to the product form, it can be divided into vegetable oil, extract, powder, lens, etc.
4. According to their use, plant extracts can be divided into natural pigment products, traditional Chinese medicine extracts, extract products and concentrated products.
Plant extract ,Proportional extract,TLC,Thin layer chromatography,Chinese herbal extract
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