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Scientific feeding of silkworms
Silkworm is a completely abnormal silky insect in polymorphic animals. Its larvae after 4 times of sleep from 5 instars 26-28 days total time to eat more than 20 grams of mulberry leaves on mature matte silkworms, bright white, weighing about 1.8-2.3 grams, layer rate of 20-23%, silk 1000-1400 meters long; silk coarse 2.6-3.2 points. It is common to raise 1 silkworm species with 18 to 20 thousand heads of silkworms, 50 to 600 kg of mulberry leaves, and 30 to 40 kg of silkworms. The current scientific breeding techniques have the following five points. (I) Strict disinfection, disease prevention and strict disinfection are the primary technical measures for preventing and controlling the occurrence of silkworm diseases. Generally, 7 days before sericulture, bleaching powder clear liquid containing 1% of available chlorine, or 3% formaldehyde solution is used for egg disinfection of silkworm, maintain room temperature, and the drug temperature is 25° C. for 30 minutes. Silkworms in silkworms should be placed. Open, spray to the liquid, close the windows and doors to sericulture 2-3 days before ventilation and ventilation. Silkworm nets and other appliances can be boiled with boiling water disinfection. (2) Concentrating on the cultivation of green and warm species The mulberry silkworm species from the library are placed in a suitable temperature and humidity environment so that the silkworm can be hatched by a predetermined date and called qingqing, also called warm species. In general, the 2-3 leaves of the sorghum begin to remind the table. Centralized custody rooms should be cleaned and disinfected in advance. Use wooden reminder boxes that are 1 meter long, 0.35 meters wide, and 0.5 meters high. Drill holes with a diameter of 1 centimeter in the upper half of the box and vent on the bottom of the box. 2-3 cm thick wet sand, 40-50 mulberry eggs are planted, covered and placed on enthalpy, starting from 20°C on the first day to 25°C on the 5th day, and kept on the seventh day at 25.5°C until the 11th The day begins to hatch. In the afternoon of seeing a few insect silkworms, they were shaded with a black cloth, and the silkworms were quickly exposed on the same day. The pre-humidity is 75% and the latter is about 85%. (3) Receiving small ants and co-cultivating small cocoons In order to save labor and standardize technical standards, it is best to implement centralized ant colony and concentrate breeding of small silkworms. The process of collecting the newly hatched ant silkworms and feeding the leaves is called receiving ants. In the sterilized silkworm cloth, the venomous plastic sheeting was sprinkled with a layer of mulberry leaves, and the silkworm eggs were pressed downwards on the mulberry leaf. After 20 minutes, the ant silkworm climbed onto the mulberry leaf, and the silkworm egg was removed. The paper immediately covers the silkworms and waits for silkworms to be released again tomorrow morning. The size of the silkworm is determined by the size of the silkworm box, and the 1-2 instar silkworms are chopped and tender green leaves are mulberry 3-5 times a day. Each time the mulberry is to be evenly spread, the plastic cloth is covered, and the temperature is maintained at 26-27°C. 3 Age 25-26 °C, 1-3 years of dry humidity 80% is appropriate, before bedtime add the net to the leaves, in some silkworms go to sleep and then add the net to the leaves put forward to sleep silkworm single feed, and remove the silkworm foil in the remaining silkworm feces And residual leaves. In the middle of sleep, you must disinfect the powder and disinfect it with fresh lime powder. After the sleep, the net is added to the leaves to be tender, and when the silkworm climbs on the leaves, the silkworm moves the new empty box. (D) Dispersion and rearing of large silkworm 4-5 instar silkworms can be distributed to each household for rearing. The ratio of mulberry eaters in large scales is about 80%, weight is 300-10000 times higher than that of ant silkworms, and it is necessary to continuously expand the foils and spread them into dense silkworms to prevent overcrowding and scratching, and to ensure that all silkworms are eaten. Eat sang. In order to save the leaf collection time, it is possible to feed the mulberry leaves with cuttings and stalks every morning and evening. The late silkworm young leaves proposed in batches during the delivery period increase the number of mulberry feedings and promote early maturity. 4 instar temperature suitable for 24-25 °C, 5 instar 23-24 °C, 4-5 humidity is 70%. (5) Cooked silkworms on the pods and pods at the end of the 5th instar period show that the mulberry plants have reduced green and soft excrement, and the body body gradually narrows and becomes shorter. The mature silkworms crawling and weaving have to use the new system of pods, folding tufts, and firewood clusters. The clusters of silkworm silkworms are of good quality and have a small double house shrine. Put the silkworm on the cluster evenly. Rareness is better, marking order, cluster room early 25 °C, 24 °C scarring, humidity of 75% is appropriate. After opening the doors and windows, it will be ventilated and ventilated to make the color white. The light in the cluster should be even to prevent the mature silkworm from gathering. For the unripe silkworms mixed in, the fodder should be picked and matured. On the 6th to 7th day after the cluster, after seeing the pods, the pods were collected in the order of the clusters, and the cultivars were piled up in a cool and ventilated place to prevent extrusion heat. In order to prevent moths, they should be baked and shredded in time. Generally, a good 1 mu of mulberry can raise 3 silkworms and produce 90-120 kg of silk to produce 15-26 kg of silk.