Chrysanthemum is a semi-cold plant. It prefers a cool, humid climate. The optimum temperature for growth is 18-20°C. It grows poorly above 29°C, and grows slowly below 12°C. It can tolerate low temperatures around 0°C for a short time. The lighting requirements are not very strict, and they are more resistant to low light and are a long daylight crop. If you can control the temperature, you can plant it in the greenhouse. I. Cultivation techniques 1. Choose the soil with soil fertility, looseness, good water retention and fertility, and convenient drainage and irrigation. 2. There were two types of lobelia var. Leaflets are more cold-tolerant and grow for 40-50 days. 3. Seeding method 3.1 Seed Treatment Soaking for 24 to 28 hours before sowing, removing and germinating under 15-20°C environment after sowing, keep moist, rinse once a day. 3.2 Planting fields After finishing tillage and fine sculpting, make a rake with a width of 1-1.2 meters and a length of 10-15 meters. Mushi smelt 3,500-4,000 kilograms of manure, and apply 15-20 kilograms of ternary compound fertilizer as base fertilizer. 3.3 Cultivation methods can be broadcast or sowing. The drilling distance is 8-10 cm, the sowing footage is 5-6 cm, and the seed amount is 2.5-3 kg per mu. Can also be broadcast, density 3.5 cm square, with 0.85 kg per mu. After sowing, the soil was covered with 1 cm and covered with a plastic film. After emergence, all the plastic film was removed. 4. Field management Keep sorghum dry to see wet, 1-2 true leaf stage, and then remove the weeds, keep the seedling spacing 4 cm or so. Note that the humidity in the booth is often observed to avoid excessive moisture. The first topdressing is performed on the four true leaves of the plant, and 5-7.5 kg of urea is applied per acre; the second fertilizer is applied to 8-10 leaves and the top dressing is 7.5-10 kg of urea per acre. About 40 days after sowing, the seedlings can be harvested at a height of about 15 cm, and can be cut with a knife, scissors, or hand spade. 1-2 days after harvest, 7.5 kg of urea was topdressed to promote collateral growth. It is harvested once every 20 days or so, until it blooms. Second, pest and disease control technology Common pests and diseases mainly include leaf blight, downy mildew, brown spot, leaf miner, whitefly, roundworm, etc. Pests and diseases should be mainly prevention. We should adopt comprehensive measures such as strengthening field management, doing a good job in idyllic cleaning, selecting disease-resistant varieties, etc. Chemical control should use high-efficiency, low-toxicity, low-residue pesticides. Leaf blight can be used 50% acetaminophen WP 1500 times, or 50% carbendazim WP 1500 times spray, alternating use. Downy mildew can be sprayed with 64% antitoxic WP, or 75% chlorothalonil wettable powder 500X. Brown spot can be sprayed with 80% WPWP 500 times, or 78% Cobo WP 500 times. Usually spray 7-10 days, even spray 2-3 times. The leaf miner can be sprayed with 2.5% saffoflavin, or 4.5% beta-cypermethrin 2000 times, or 0.9% protoporphyrin 1500-2000 times, or 1.8% protoporphyrin 3000-4000 times. The aphids can be sprayed with a 1000-2000 times solution of a 10% antimony net, or a 4.5% solution of cypermethrin 1500 times. The drug was stopped 15 days before harvest. China has become the world's largest producer of Antipyretic And Analgesic drugs. The output of aspirin, paracetamol, analgin and other varieties has exceeded 10,000 tons, and the output of phenacetin, aminopyrine, antipyrine and other varieties has exceeded 1,000. Ton. At present, the output of Antipyretic analgesics in my country is growing rapidly, and it is expected to grow at a rate of about 8% in the future. The production of intermediates for antipyretic and analgesic drugs is large, and there are many manufacturers. With the growth of antipyretic and analgesic drugs, their intermediates have also developed by leaps and bounds. Medicines Intermediates,Brexanolone Vs Ganaxolone,Brexanolone Price,Brexanolone,Minoxidil Sulfate Xi'an Henrikang Biotech Co.,Ltd , https://www.xianhenrikang.com
In 2003, the domestic consumption of paracetamol increased rapidly, and the export also showed a rapid growth momentum. The export volume was 28,163 tons, and the annual export volume increased by about double. In the first half of 2004, although its export growth slowed down, it still increased. From January to May 2004, the export volume of paracetamol was 12,501 tons, slightly higher than the same period last year. Para-aminophenol is an important intermediate in the synthesis of paracetamol, which is growing rapidly. The annual output of p-aminophenol in my country is 32,000 tons. It is estimated that by 2005, the domestic production of paracetamol will reach more than 50,000 tons, and the pharmaceutical industry will consume 45,000 tons of p-aminophenol. The total demand for phenol is about 50,000 tons, the market gap is large, and the development and utilization prospects are broad.
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