In winter, it is cold and cold. Therefore, the farms (households) need to pay attention to the following issues during the cattle breeding process to ensure that the cattle are safe for winter. Grab the autumn grazing before winter to allow the cows to eat well during the autumn grazing, accumulate some oils to resist the cold in winter and keep the cattle healthy. The cowhouse should be insulated to ensure the proper temperature of the cowshed, which can reduce the calorie loss of the cow body. Therefore, the damaged air leakage department must be repaired to prevent the thieves from invading. Feed nutrients should be balanced and the daily crude material per cow must not be less than 6 kg. The forage and concentrates must be diversified, and they should not be fed just one feed. Drinking Water to Sufficient The metabolism and body temperature of cattle are regulated by water. Sprinkling bran on the water can prevent cows from drinking. Allowing cattle to drink warm water is more conducive to cow insulation and miscarriage. Do not rough feed stump feed hard, crush before feeding, 3 ~ 4 cm is appropriate. The utilization rate of comminuted straw is high, and the cow is easy to eat after eating. Feeding cows should be regularly quantified If the feeding cows have no regularity, it is easy to cause the cow's digestive system disorders, so regular quantitative feeding is conducive to beef cattle growing stronger. It is easy to cause poisoning when feeding moldy and deteriorating feed to cattle and eating moldy and deteriorating feed. Therefore, we must not feed mildewed feed to avoid unnecessary losses.
Plant extraction process
1. Select plants/herbs. No more than ancient prescriptions, prescriptions, folk herbs to find. At present, common and uncommon herbs have been studied. At present, it is mostly to increase the amount of medicinal materials to extract and separate components with low content, or to find medicinal plants that have never been studied from miao medicine, Tibetan medicine, Mongolian medicine, Africa, Latin America and other places.
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2. The extraction. Solvent petroleum ether, n-hexane, cyclohexane, benzene, chloroform, ethyl acetate, n-butanol, acetone, ethanol, methanol, water (low polarity → high polarity). Daily medicine decoction effective, water and ethanol and other solvents with large polarity, such as artemisinin boiling ineffective extraction with petroleum ether and other solvents with small polarity. Common medicinal materials water/alcohol/ether to go through, separation and identification of more compounds.
3. The separation. This is the most important work. In the solution extracted from the second step, there are dozens of compounds, usually by column chromatography, which is often referred to as the column flushing. It's a lot of work, it's boring, it's low tech. A master's student might do this every day for two years. The column for separating compounds, as shown below, is as large as 2 meters high and as small as 10 centimeters. Change the solvent condition of mobile phase, change the material of column, different conditions and different separation principles of column repeatedly punching, can be separated from the monomer compound.
Winter cattle care points