Key Points for Simple Spring Cultivation Techniques of 'Zhengsong No. 1' Scallion

I. Variety Introduction 'Zhengsong No. 1' has tall plants, thick and long white stalks, rapid growth, high yield, strong stress resistance, and a delicious flavor. It can be sown in both spring and autumn.

II. Land Preparation and Sowing Sow from March to May in spring using the furrow direct sowing method. Apply sufficient base fertilizer: 3-5 cubic meters of farmyard manure and 40-50 kg of ammonium bicarbonate per mu. After plowing, directly lay out lines and open furrows with a furrow spacing of 70 cm, furrow width of 20 cm, and depth of 20 cm, with two rows per furrow. Before sowing, first broadcast compound fertilizer in the furrow, then hoe once to make the soil and fertilizer uniform. Along both sides of the furrow, open two small furrows in parallel, sow scallion seeds in the small furrows, cover with soil 1-1.5 cm thick after sowing, with a sowing rate of 0.8 kg per mu.

III. Post-Sowing Management Water immediately after sowing; after the water seeps in, spray herbicide for soil sealing. Spring temperatures are low and seedlings emerge slowly, so the soil surface should be kept moist for 20 days after sowing, but do not flood irrigate. After seedlings emerge, pay attention to timely watering or applying diluted manure water to promote seedling growth, and loosen the soil after watering. When the seedlings enter the rapid growth period, thin them 1-2 times, remove small and weak seedlings, and replant in time, leaving 36,000-38,000 plants per mu. Combined with watering, apply quick-acting nitrogen fertilizer or nitrogen-phosphorus-potassium compound fertilizer in 2-3 topdressings, 10-15 kg per mu each time, to promote rapid seedling growth.

IV. Summer Management Summer has high temperatures and frequent rain. First, prevent weeds from overtaking the seedlings. Second, prevent waterlogging.

V. Autumn Management After entering August, the weather gradually cools, the temperature difference between day and night increases, and the white stalks begin to lengthen and grow, so topdressing should begin: apply 20 kg of nitrogen-phosphorus-potassium compound fertilizer per mu, then broadcast 15 kg of urea, shallow hoe once, and then water to promote growth. From late August to early September, the climate is suitable, and this is exactly the white stalk growth period. Continue topdressing and carry out earthing up, with the height of earthing up limited to not burying the leaf hearts, so that the original ridge backs become furrows, and water after earthing up. Late September is the period when white stalk yield increases significantly and also the peak period of fertilizer demand, so earthing up should be carried out again. After earthing up, topdress with 20 kg of urea and 20 kg of nitrogen-phosphorus-potassium compound fertilizer, then water thoroughly. After entering October, stop topdressing and just keep the soil surface moist.