The best top-dressing period for several major crops
Corn and maize are the peak period of nutrient absorption after jointing until the bell-mouth period. Generally, the first fertilizer can be applied before and after jointing, and 150 kg of ammonium nitrate or 120 kg of urea can be applied per hectare; 7 to 10 days before tasselling. The second fertilizer should be applied, and 225 kg ammonium nitrate or 180 kg urea can be recovered per hectare. If the base fertilizer and seed fertilizer are more abundant and the soil is very fertile, you can concentrate on topdressing once, and use the second spade for deep fertilization. In order to meet the needs of sorghum from jointing to heading, the sorghum should apply the first fertilizer at the jointing stage, 150 to 225 kg of ammonium nitrate or 120 to 180 kg of urea per hectare; In the sub-fertilizer, 120 kg of ammonium nitrate or 75 kg of urea is applied per hectare. The absorption of nitrogen fertilizer by rice in rice began to increase gradually after turning green, and reached the highest peak of fertilizer absorption during the peak period of tillering. In order to promote the early delivery of rice, early application and re-application of manure. Generally, 7 to 10 days after transplanting, 225 kg of ammonium sulfate can be applied per hectare, and 100 kg of urea can be topdressed at the time of heading. Wheat wheat should be topdressed in the three-leaf stage, generally applying 195 to 270 kg of ammonium nitrate or 135 to 180 kg of urea per hectare. Due to the weakening of the roots' ability to absorb nutrients from the soil in the later stages of the wheat, an extra-root fertilizer should be applied once at the heading and flowering stage. Potassium dihydrogen phosphate 2250 g per hectare can be used, and 22.5 ml of the triacontanol stock solution and 300 kg of water can be formulated into a mixture. Spraying; 3000 kg of potassium dihydrogen phosphate per hectare, 15 kg of urea, and 450 kg of water can also be sprayed. Peanut and peanut nutrition critical period is in the early growth period, about 15 days after the emergence of peanuts, flower buds began to differentiate a large number of root nodules began to form. When two pairs of lateral branches appear in the plant, nitrogen fertilizer should be applied in a timely manner, and 150 or 120 kg of ammonium nitrate should be applied to each hectare. Soybean Soybeans are crops that require more N fertilizer. Usually, topdressing N fertilizers at the initial flowering stage of soybeans can reduce the rate of falling flowers and plants, and can prolong the life span of plants, increase grain weight, and increase yield. Generally, 150 to 225 kg of ammonium nitrate or 120 to 180 kg of urea can be applied per hectare; during the period of soybean crusting, extra-root dressing can be conducted once, and the effect of increasing production is more obvious.
Bulk of varicella vaccine,semi-Finished Products.It has good safety with low ratio in adverse reaction. And it has been exported to Bangladesh.
In 2008, BCHT successfully launched its product Varicella Vaccine, Live in China. In the following years, BCHT continuously committed to improving the product and led in 2010 removal of gelatin from adjuvant and extended the vaccine shelf-life up to 36 months which is the longest one in the world in 2011. And it has the following qualities.
Rabies Vaccine,Freeze-Dried Rabies Vaccine,Mild Rabies Vaccine,Stable Rabies Vaccine For Human Use Changchun BCHT Biotechnology Co.,Ltd , https://www.ccbcht.net
