Watermelon is a food crop for melons and fruits, generally acidic and alkaline fertile soil, are suitable for planting. Its whole growth period is divided into: germination, seedling stage, flowering stage and result stage. The proportion of nitrogen, phosphorus, and potassium nutrients required was on average about 1:0.36:1.35. During the seedling stage, less fertilizer was needed, and the vine extension period increased. The fruit swelling period reached a peak and the maturity period decreased. Watermelon is a good potassium crop, and the proportion of nitrogen and potassium fertilizers is about 1:0.4 to 1:0.7 north of the Yangtze River and about 1:0.7 to 1:1 south of the Yangtze River. The amount of potassium increased gradually from north to south, which is contrary to the trend of soil available potassium content, which is conducive to the balance of demand.
Most watermelon yields are 2 to 3 tons. According to this level of production, the amount of fertilizer per acre is recommended:
1, base fertilizer. Compound fertilizer (15-15-15) 35 ~ 45 kg (or 13 kg of urea, calcium 40 ~ 60 kg, potassium chloride 8 ~ 13 kg), high-quality organic fertilizer 100 ~ 200 kg, 1 ~ 2 times;
2, urging vinegar (vine about 35 cm long). Urea 7 to 12 kg;
3, fruit enlargement period. Urea 10 ~ 15 kg, potassium chloride 5 ~ 10 kg, 1 ~ 2 times Shi. The maximum amount of fertilizer should be taken as the upper limit, and the lower limit should be taken as the yield. Excessive nitrogen fertilization tends to result in rough vines and must be removed. Watermelon sweetness is related to potash fertilizer, rainwater and seeds. Rainwater will dilute sweetness, and seed genetics is an internal cause, affecting longer. Phosphorus and potassium fertilizers have more residues in soil than nitrogen, and have a large buffering effect. They have little effect on the season and do not even affect it. However, they must be supplemented in the next season.
The watermelon is fertilized with a spread, a hole, a ditch, or a dredge. Acupuncture points or furrows are applied between the rows of planting or sowing, and are about 15 cm from the seedlings. The fertilizer should be mixed well with the soil to avoid contact between the young roots and the fertilizer and to injure the roots. Nitrogen, phosphorus and potassium are easily transferred in crops: Phosphorus fertilizers are generally used as base fertilizers to promote early tillering and more tillers; nitrogen and potash fertilizers are used as base fertilizers, top dressings, and improve quality to prevent prolonged growth and reduce production. Watermelon is susceptible to calcium and boron deficiency. Spraying 0.5% calcium nitrate solution, 0.2% boric acid and potassium dihydrogen phosphate solution to prevent premature aging and improve quality during pumping or fruit setting.
An amorphous carbon. Light, loose and very fine black powder with a very large specific surface area ranging from 10 to 3000m2/g is the product of incomplete combustion or thermal decomposition of organic matter (natural gas, heavy oil, fuel oil, etc.) in the absence of air. Specific gravity of 1.8-2.1 made from natural gas called "gas black", made from oil called "lamp black", made from acetylene called "acetylene black". In addition, there are "trough black" and "furnace black". Carbon Black is classified into "reinforcing carbon black", "conductive carbon black" and "abrasion resistant carbon black". It can be used as a black dyestuff for the manufacture of Chinese ink, ink, paint and so on. It is also used as reinforcing agent for rubber.
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.
Carbon Black
Carbon Black,Industry Carbon Black,Pellet Carbon Black,Superfine Carbon Black
Shandong Chenyi Environmental Protection Technology Co.,Ltd , https://www.chenyichemistry.com