First, seed propagation
Site preparation and land preparation: The requirements for soil are not strict, but it should be higher in the topography, good drainage, loose soil, and air permeability in sandy loam. Low-lying, easy-to-eat, drought-prone viscous and limestone plots should not be planted. Application of base fertilizer before soil preparation, 1000-2000 kg per acre applied to mature manure, deep plowing, depth 30-40cm, squeezing, leveling, making a boring machine, 8m1.2m for rake, rake high 8-18cm, width 30- 40cm, about 40cm between the two channels, and additional barriers between the two to prevent and reduce soil erosion.
Because the seed is small and direct seeding is not easy to emerge, the seeds should be treated first. Treatment method: Put the seed into a cloth bag, soak it in fresh water for 24 hours, change the water for 1-2 times, then take it out and spread it, the thickness is 1-2cm, place it at 15°C, cover with wet covering (such as sacks, Bags, etc.) can be sown when 50% of the seeds are white. When sowing seeds, first mix the seeds with 1:10 clean sand, and then ditch the seedlings in a row with a spacing of 30 cm and a ditch depth of 0.5-1 cm. Spread the seeds evenly into the ditch, then cover the soil with 0.5 cm, and water after a slight crack. Then cover the straw or straw and other moisturizers. When the seedlings are to be unearthed, the coverings are removed in the evening or in cloudy weather, and transplanted after 1 year of cultivation.
Second, rhizome breeding
Select rhizomes of more than 2 years old, cut into small pieces of 10-15cm long, open the hole according to the spacing of 30cm, spacing 25cm, depth of hole 10-15cm, hole width of 15cm, plant 2-3 roots per hole, cover soil 10cm, pour water. In mid-March in northern China and in mid-April in the northeast region, seedlings emerged in 30 days.
Third, the division breeding
Roots and roots were excavated from the shoots and transplanted after the plants had withered or before sprouting in the spring.
Fourth, field management
Weeding and weeding, when the seedling height is 5-6cm, the weeds should be promptly removed, and the soil should be loosened. Every year weeding and weeding should be carried out 3-4 times. According to the water content of the soil, irrigation should be carried out timely to promote the growth of seedlings.
Fifth, top dressing, when the seedling height 10cm when the first topdressing, apply 3-5kg of nitrogen fertilizer per acre; from late June to mid-July, the second topdressing, applying 10kg of phosphate fertilizer per acre, 5kg of potassium, and then watering. Fertilization stopped in late July.
Sixth, seedlings Dingmiao, when the seedling height 5cm or more combined with loose soil weeding, between the weak seedlings, too dense seedlings or diseased seedlings, while transplanting seedlings nursery, plant spacing 5-8cm.
7. Keep seedlings and choose robust disease-free plants as seeds. When the fruit turns from green to yellow, it will be harvested, and it will be shredded when the fruit is completely cracked, and then dried for 2-3 days. In addition to the net impurities, it shall be placed in a bag and stored in a cool, dry and ventilated place.
Eight, pest control
Apocynum rarely develops disease during growth. The disease is mainly spot blotch. If spot blotch is found during growth, it should be prevented immediately with 50% tumefa 600-800 times, and if it is necessary to apply again, it should be 7-10 days apart. It is necessary to remove the diseased plants in time and clear the gardens at the time of harvest to centralize the destruction of diseased plants so as to reduce the source of infection.
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