Cultivation techniques of chrysanthemum chrysanthemum with annual harvest of three crops

Chrysanthemum has a short growth period and is suitable for planting in fertile and loose sandy loam. 2500~4000 kg of high-quality farm manure, 50~100 kg of calcium superphosphate and 50 kg of ammonium bicarbonate are used for every 6 mu. Turn the soil deeply so that the soil and fertilizer mix well and evenly. After raking, make a ridge with a width of 1~1.5 meters.

crowndaisy chrysanthemum

Seeding: large leaf chrysanthemum is mostly used for direct seeding. Sowing or sowing is acceptable. Seed soaking and germination treatment can be carried out to promote seedling emergence. The method comprises the following steps of: soaking chrysanthemum seeds in warm water for 24 hours, taking out and drying, germinating at the temperature of 15 - 20 DEG C, and sowing when the seeds are white. Sowing 3~4 kg per mu, in order to increase yield and improve quality, the amount of seed used can be increased to 5 kg per mu. For drilling, furrow 1 cm deep in rows of 15~20 cm in border, irrigate thoroughly. The amount of seed used per mu is about 2 kg. Cover with 1 cm of soil after sowing. Chrysanthemum sown in early spring should be covered with plastic film for cold protection; in early autumn, the temperature is higher and it is difficult to emerge, so the sowing amount should be increased. After sowing, Chrysanthemum should be shaded from high temperature and sunlight, and watered every day to keep the soil moist.

field management

Thinning and weeding. When chrysanthemum seedlings grow 1~2 true leaves, they should be thinned in time. The seedling spacing of sowing chrysanthemum is 4 cm, and the plant spacing of drilling chrysanthemum is 3~4 cm. Thinning out seedlings and weeding the fields. When transplanting seedlings, when the seedling age of chrysanthemum reaches about 30 days, it can be transplanted, and the density is 16×10 cm.

Fertilizer and water management. For direct seeding in the field, water can be poured for the first time when the second leaf of chrysanthemum seedlings is unfolded after thinning. For seedling transplanting, spray small water once or twice a day for 2~3 days after planting, and then irrigate small water once a day in the morning and evening until the seedlings are slow. Chrysanthemum in the growing season can not lack water so keep the soil moist, but the field can not accumulate water. When sowing in early spring, water content should be properly controlled after chrysanthemum seedlings emerge to prevent damping-off disease. When the chrysanthemum plant grows to 10~12 cm, the first topdressing is started, and urea is used for 10~20 kg per mu, and irrigation is immediately carried out after topdressing.