Forsythia planting and cultivation

Forsythia cultivation is as follows:

1. Land selection and soil preparation select sunny sandy loam with fertile soil, loose texture and good drainage, plough in autumn, plough 20- 25cm deep, apply base fertilizer in combination with soil preparation, apply circle fertilizer 2000- 2500kg per mu, and then rake and level. The direct seeding field is arranged according to the row spacing of 130 cm ×200 cm, the hole depth and hole diameter are 30-40 cm, and the nursery field is made into a flat bed with a width of 1 meter, and the length depends on the terrain.

2. The propagation methods are mainly seed propagation and cuttage seedling, but also layering and subplant propagation.

(1)Seed propagation and direct seeding are carried out in the south in the first and middle of March and in the north in the first ten days of April. Dig a small pit in the prepared pit, about 3 cm deep, select mature, plump and disease-free seeds, sow 5-10 seeds in each pit, cover the soil and press slightly to make the seeds closely combine with the soil. It usually blooms after 3-4 years.

Seedling transplanting: in the leveling harrow fine seedbed, according to the row spacing of 20 cm open 1 cm deep ditch, the seeds mixed with fine sand evenly scattered into the ditch, slightly pressed after covering soil, with 2 kg of seeds per mu. Spring sowing about half a month seedling, seedling height of 5 cm for seedling determination, 10 cm high when loosening weeding, each mu topdressing urea 10 kg, watering with water into, promote seedling growth. Transplant before germination in autumn of the current year or spring of the following year. According to the plant spacing of 120 cm ×150 cm, hole diameter of 30 cm, apply 5 kg of miscellaneous fertilizer, mix well with soil, plant 2-3 seedlings, fill the soil to half hole, lift the seedlings slightly, make the roots stretch, and then cover the soil to fill, solid. If the soil is dry, water it after transplanting, and then cultivate the soil to preserve moisture under water infiltration.

(2)Cuttage seedlings are grown on rainy days in summer, the middle and upper parts of 1-2-year-old young shoots are cut into cuttings with the length of 30 cm, furrows with the depth of 20 cm are opened on the seedling bed according to the row spacing of 5 cm * 30 cm, the cuttings are obliquely placed in the furrows, then the cuttings are covered with soil and compacted, the furrows are kept moist, roots can be rooted and survived in the same year, and the cuttings can be transplanted before germination in the spring of the next year.

3. Field management of seedling stage of seed propagation, weeding, loosening and thinning when seedling height is 20 cm. Thinning leaves 2 plants per hole and waters them in due time. Seedling height of 30-40 cm, can be applied diluted feces urine water 1 time, promote its growth. Trunk height 70-80 cm when cutting off the top, multiple lateral branches, cultivated into main branches. After that, 3-4 strong branches are selected on the main branch to cultivate into auxiliary main branches, and lateral branches are released. Through shaping and pruning, the natural open-heart branch type with lower than short crown, hollow inside and round outside, ventilation and light transmission, sparse twigs and early fruiting is formed. At any time cut off the thin branches and excessive long branches and pest branches. Farm manure, phosphorus and potassium fertilizer can be applied during the fruiting period to promote early fruiting.