When spring onion management is in progress in autumn

After years of field experience, it has been proved that in order to increase the yield and income of green onions, we must pay close attention to three points after the beginning of autumn, so as to ensure that the green onions grow strong, the root system is strong, the leaves are green, and the main stem is long and strong. First, when the plant growth is accelerated after timely fertilization and watering the Beginning of Autumn, cucumber, topdressing "leaf-attacking fertilizer", applying rotten farm manure 1500 kg ~ 2000 kg per mu and calcium superphosphate 20 kg ~ 25 kg per mu to promote leaf growth. White Dew entered the peak period of green onion growth, which is the key period for the formation of green onion yield. "attacking plant fertilizer" should be applied twice combined with watering, each mu of urea 15kg ~ 20kg, potassium sulfate 10kg ~ 15kg, balsam pear, sprinkled between rows. Watering after shallow ploughing, usually 2-3 times. Watering is based on the principle of dry soil on the ridge and moist soil in the ditch. Second, cultivate the soil in time to grow quickly. Only by cultivating the soil many times in time can the spring onions grow fast and sturdily, which can be divided into 4-5 times. Each time, the height of the soil can not be buried in the center of the onions. Too light soil is not conducive to the rapid growth of onion stem white body, too much soil causes rotten heart, resulting in reduced yield or yellowing of leaves. Third, timely pest control of green onion diseases and insect pests include downy mildew, black mildew, purple spot, leaf miner, root maggots and so on. Use "new high fat membrane" emulsion 300 grams per mu, 230-250 kg water, spray evenly, interval 7-10 days, spray 2-3 times, effectively prevent downy mildew of Welsh onion. Black mold, spray with 0.1% copper sulfate or 1% lime water or 0.1% potassium permanganate solution 50 kg. Purple spot, spray with 80% Dyson zinc 0.5% aqueous solution or with 50% thyroid 0.1% aqueous solution or copper sulfate, quicklime and water, spray Bordeaux solution according to the ratio of 1 to 1 / 200 Bordeaux solution, 50 kg per mu. Root maggot pests, 5 kg methamidophos powder or 2.5% trichlorfon powder 3.5 kg-4.5 kg per mu or 2.5 kg phoxim granules applied to the soil. Red spiders can be controlled with mite Guangling 3000-3500 times or red and white mites 2500-3000 times. It is an important period for the growth of vegetables after the Beginning of Autumn. The focus of field management of green onion is to promote root, strong plant and soften soil, strengthen fertilizer and water management, and create suitable environmental conditions for the formation of green onion, so as to improve the yield and quality of green onion.