1 Select the soil and sandy loam that meets the requirements of NY5010 pollution-free vegetable production base for air, irrigation water, and soil environmental quality standards, with deep soil, loose soil, and good drainage.
2 Variety selection The varieties with low temperature resistance, high quality and high yield, resistance to pests and diseases, and good commercial quality are selected. The varieties that are suitable for cultivation in this area include the new Kuroda five-inch, a product wax, Dahongding, and Quansheng.
3 Soil preparation and fertilization
3.1 Soil preparation, carrot rooting, deep rooting, straight roots with four vertical lateral roots, more than two rows of radish root, so prone to dislocation. There are many factors that induce dislocation, such as cultivation in poorly-drained low-lying lands; use of unripe organic fertilizers and high nitrogen concentration in cultivated soils; shallow plowing layers, hard plowed-bottom soils, and compaction. Therefore, in order to improve the commercial quality of carrots, the following points should be noted during the soil preparation stage: (1) Choose sandy loam or loam with good drainage. 2 The arable land should be deep and the site preparation should be fine. Generally, the depth of ploughing should be 20 to 30cm. Twice after ploughing to make the field soil loose and fine, in order to ensure good growth and emergence of roots. 3 The best choice for high ridge cultivation, ridge spacing is 40 ~ 50cm, ridge height 15 ~ 20cm. Pingyan cultivation is generally 90-100cm wide, depending on the length. After a comparative test, the cultivation of high-row ridges was higher than that of flat-row cultivation, and the tillering and rooting rate were low.
3.2 Fertilizer Carrots require N, P and K to be mainly potassium, followed by nitrogen and phosphorus. Adequate potash fertilizer is beneficial to the development and coloration of fleshy roots. Adequate phosphate fertilizer is beneficial to increase the sugar content of carrots, and the amount of nitrogen fertilizer should not be excessive. many. The combination of moderately fertile plots and deep plowing applies 3,000-5,000 kg of decomposed organic fertilizer, 25 kg of ternary compound fertilizer, and 2 kg of phoxim (to prevent underground pests) per 667 square meters.
4 Seed treatment Spring sowing carrots have low temperature and slow germination. In order to make the seeds and the soil contact evenly, the seeds are to be plucked before sowing. At the same time, soaking treatment with warm soup. The seeds were soaked in hot water at 50°C for 25 minutes and soaked at 15 to 25°C for 4 to 5 hours, often turning the seeds. After excavation, germination is performed for 5 to 7 days at 20 to 25°C. 60% of the seeds are exposed to buds and stored at 0°C in a low-temperature environment for 3 to 5 days.
5 Seeding
The sowing is conducted from late April to early May. The sowing rate is 0.5 to 0.75 kg per 667 square meters. In order to give carrots germination and seedlings to create good conditions, in the sowing, the use of Chinese cabbage, green radish, spinach, fast growth, carrots in the shade of cabbage, green radish, spinach to facilitate the emergence of the characteristics, can be mixed cabbage, green radish, Spinach cover soil 0.6 ~ 1cm, soaking water after sowing, until the surface yellow dry after the flat surface.
6 Field Management
6.1 Weeding Seedlings The sprouting of carrots is slow and the seedlings grow slowly. At this time, it is a hot and rainy season in Xining. Weeds breed quickly and are easy to form grassland, which affects the growth of seedlings. Therefore, weeding must be done in time to supplement the herbicide by hand weeding. When the carrot seedlings grow to 1 to 2 true leaves, the first time the seedlings, seedling distance 5 ~ 7cm, 5 ~ 7 leaves when the Dingmiao, seedlings from about 10cm, 667 square meters seedlings about 32000. Chemical weeding can be used for every 667 square meters of high-efficient straw to 20 ml of water to 30 kg of ground spray.
6.2 After the first time of cultivating, the middle of the cultivator, between the rows, weeding, weeding to protect the seedlings, promote the growth of seedlings, the second cultivator after the fixed seedlings, shallow and deep before the cultivator to avoid injury.
6.3 watering carrots in the germination phase of pouring water, soil moisture maintained at the soil maximum water holding capacity of 60% to 70% is appropriate to facilitate seed germination, seedling protection, Miao Qi. When the seedlings grow to 9 to 14 leaves, they control the amount of water to keep the soil moist. When the fleshy root begins to enlarge (ie when the finger is thick), it is watered to ensure sufficient moisture. Under normal circumstances, 2 to 3 times of water is poured in the whole growth period to promote the development of roots in depth, prevent cracking, and improve product quality. 50 days after sowing, the roots of the fleshy roots must ensure sufficient moisture during their expansion.
6.4 Prevent the green shoulder padding from being kept at 25cm. Cover the shoulders of carrots with soil and do not bury the center of the stem.
6.5 Fertilizer Carrots recover 2 to 3 times of fat during the growth period. 667 square meters topdressing diammonium phosphate, potassium sulfate 15kg or urea 5kg, the first topdressing 15 days after the second topdressing. The second dressing is conducted at an interval of 20 to 25 days, and 10 to 15 kg of ammonium sulfate or diammonium phosphate and 10 to 15 kg of potassium sulfate are applied per 667 square meters. 667 square meters of topdressing ammonium sulfate 5 ~ 10kg or application of bio-potash fertilizer effect on carrots.
7 Pest Control
7.1 Prevention and control of black spot and black rot The selection of good varieties, rational distribution, rotation of crop rotation, application of organic fertilizer, cultivating and weeding, cultivation of disease-free pests and strong seedlings, and reduction in the number of pests and diseases. Warm soup soaking. Seed dressing was performed using 70% mancozeb with a seed content of 0.3%. At the beginning of the disease, 75% chlorothalonil wettable powder 600 times liquid or 50% fasting wettable powder 1500-2000 times liquid spray is used for prevention and treatment. Or 50% acetaminophen wettable powder 1000 to 1500 times spray control. Every 10 days or so, continuous control of 2 or 3 times, 15 days before harvest to stop medication.
7.2 Bacterial soft rot
From June to August, it was a concentrated rainfall period in Xining City. It was prone to soft rot. The plant was cultivated in high ridges. The diseased plants were excavated in time and lime was added. Neemectin 400 times spray or 72% agronomy streptomycin wetability Powder 400 times spray.
7.3 Mosaic disease strengthens field management, prevents aphids in time, meets fertilizer and water supply during growth, promotes plant growth, and enhances resistance to disease; at the beginning of disease, 20% viral rick or 1.5% phytopathogenic spirit No. 2 emulsifiable concentrate is sprayed at 1000 times and collected. Stop medication for the first 15 days.
7.4 Underground insect pests, helminths, etc. can be treated with 50% phoxim 2500-3000 times fluid or 2000 times fluid.
7.5 Aphids can be sprayed with 20% cypermethrin EC 2000 to 3000 times spray or 3% MOBIL 2000 times.
8 Harvesting and Storage When carrots are about 80% of the outer leaves turn green from yellow to wilting, the carrot roots are sufficiently enlarged for harvesting, suitable for harvest from early September to late October, and the harvest is completed before freezing.
When harvesting, the tools should be clean and free from pollution, and they should be sorted out in stages to remove deformities, cracks, and small carrots. The intact products should be packaged and shipped in woven bags. Carrots are resistant to storage and can be stored for 5 to 6 months under conditions of low temperature and relative humidity of about 90% to 95% at about 1°C.
Author: Qinghai Xining Agricultural Technology Promotion Station
The pharmaceutical industry is divided into three categories: natural extraction, biosynthesis and chemical synthesis. Pharmaceutical Intermediate is a fine chemical product in the production process from pharmaceutical chemical raw materials to raw materials or drugs. The synthesis of chemical drugs depends on high quality Pharmaceutical Intermediates. In short, pharmaceutical intermediates refer to semi-finished products or important raw materials for the production of drugs. Pharmaceutical intermediates are also an indispensable part of supporting the pharmaceutical industry. At present, there are about hundreds of pharmaceutical intermediates products, and they are constantly evolving from the old to the new, forming a large number of sub-molecular industries in the pharmaceutical intermediates industry, mainly including: cephalosporin intermediates, amino acid protectants, vitamin intermediates, quinolones intermediates, and other types of intermediates, such as medical disinfectant intermediates Antiepileptic drugs intermediates, fluorine-containing pyridine intermediates, steroid medicine intermediates and so on. The production of synthetic drugs and the research and development of new varieties are inseparable from the production and development of pharmaceutical intermediates. At present, the main pharmaceutical intermediates used in the production of drugs by chemical synthesis methods are vermicular and its derivatives, morphine and its derivatives, street and mushroom compounds, and used in the production of lactamides and cephalosporins antibiotics.
Our Services
1. OEM(????) service is available.
2. Fast producing time.
3.Cheapest price forproduces.
4. Reply promptly in 24 hours.
5.Free sample available.
FAQ
Q1: product specifications?
A: we will pack the product specifications according to your needs.
Q2: Do you have some videos where we can see the line production?
A: Yes, we can provide some videos for reference. (yes, we can provide some videos).
Q3: How about payment terms? What kind of payment terms do you have?
A: 30% TT deposit + 70% TT before shipment, 50% TT deposit + 50% LC bala
Nce, Flexible payment can be negotiated.
Q4: what advantages do you have?
A: the quality of the products we offer can be guaranteed and will provide you with very competitive prices.
If you have any questions, please contact with us directly. Organic Intermediate are produced by HRT bearing With High Quality and Good Appearance. Welcome you can visit our Factory. For inqury, please send mail directly to us.
Pharmaceutical Intermediates
Pharmaceutical Intermediate,Capecitabine Intermediates,Phenyl Salicylate,Intermediates Of Procaine Hydrochloride
Shandong Chenyi Environmental Protection Technology Co.,Ltd , https://www.chenyichem.com