Onion fertilization management
Onion has a long growing period and requires more fertilizer, timely dressing is an important measure for high yield and high quality. Scallion dressing should be carried out in phases. The early ongrowth, the beginning of summer, the weather turned cold, plant growth gradually accelerated, should be chasing 1 leaf fertilizer. At this time in North China, about 225 to 300 kg of compound fertilizer, 225 kg of urea and potassium sulfate, or 15,000 to 22,500 kg of fertilized organic fertilizer can be applied per hectare in late August. Ditching in the ditch and then watering can meet the need for leaf growth and growth. In early September, the temperature dropped to the appropriate temperature for scallion growth, and the light blue rice was in its peak period of growth, which was the fastest time for yield. At this point, the green onions require the most fertilizer, should be applied to attack the tree fertilizer, the amount of fertilizer should be equal to or slightly more than the first time the amount of fertilizer. After dressing, it can be bred on both sides of the green onion to turn the original ridge back into a furrow, and timely watering can meet the needs of the fast growing onion. In late September to early October, the climate in North China is cool, which is the fast-running and storage of photosynthetic products of welsh onion, and the period of significant increase in light blue yield is also the peak period of fertilizer production before product formation. In the main lush regions in Shandong, welsh onions and wheat are generally grown as intercropping. At this time, the value of wheat is sown. In order to make the wheat have sufficient basal fertilizer, one should chase big fertilizer once. Generally, 60,000 to 75,000 kilograms of organic fertilizer is applied per hectare, plus 375 kilograms of compound fertilizer, or 300 kilograms of each of urea and superphosphate. This fertilizer has the dual role of ensuring the quality and high yield of welsh onion and the need for interplanting wheat. After entering October, due to sufficient fertilizer, the number of leaves and leaf area have increased to the top, so no additional fertilizer is needed. In order to promote cell division, enhance photosynthesis in leaves, and increase yield, from the beginning of August, spraying Shuofeng 4811 times every 20 days with a concentration of 0.01%. Spray 3 times in total. Quantitative Pcr Instrument,Fast Real Time Pcr,Pcr System Thermal Cycler,Array Real Time Pcr System Jiangsu Dinai Bioengineering Co.,ltd. , https://www.dinaipcr.com