The main use of seed propagation, can also be used for breeding, cuttings breeding. Sowing should be accompanied by sowing, 1000 grain weight 7.7 grams, germination rate of 65% to 85%. The cutting propagation has a high survival rate of about 85%, and the cutting seedlings grow quickly. Extensive management.
Seeding and reproducing seed collection
(1) Selection of mother trees for seed collection Before seedlings of white buckwheat can provide a large number of excellent seeds, in order to improve the growth and material quality of the trees, the seeds of the fine type and fine individual plants should be collected when collecting seeds, or harvested in an excellent type, and the growth is strong. The seed of the strong stand, the stand dominated by the bad type, the senescent tree and the forest with serious pests and diseases should not be planted. Mother trees are 6-20 years old.
(2) Seed harvesting and seed storage Physiological maturity and morphological maturity of white peony seeds were basically the same. At this time, it is the most suitable time for seed collection, during which the seedlings grow best; when it is too early, the water of the wing is large, the nutrients are insufficient, there are many medlars, the germination rate is low, mildew is easy to produce, and the quality of the seedlings is poor; The wind is scattered and hard to collect. The newly harvested seeds should be kept dry in the air. Do not expose it to prolonged exposure. After drying out, remove debris for sowing or storage. The main storage conditions of Angelica dahurica seeds are dryness and low temperature.
(3) Selection of nursery lands and site preparation Planting seedlings and seedlings The best choice is for deep soils, fertilizers, irrigation conditions, well-drained sandy loam or loam. Remember to choose low-lying seedlings.
(4) Seeding should be planted with the seeds. Seeds are generally not germinated. It is best to go to the fruit wing. It can evenly spread the seeds. The seeds transferred by long-distance transportation or the seeds stored in the next year may be mixed with wet sand before sowing. The seeds may be turned 2-3 times a day, 2-3 days later, and when 1/3 of the seeds appear white roots, they are sown immediately. Before planting, the bottom water shall be poured on the boring machine. After the water is soaked, the seeds can be sown without sticking the tools. More seeding is used for seeding. Bars are 30 centimeters, 3 lines per bed, 5 centimeters wide, 2 cm deep. Sowing should be uniform to prevent breakage of seedlings. About 0.5 centimeters of cover soil, not suitable for seed. After covering the soil, lightly repress it in time to make the seed closely contact with the soil to prevent wind penetration and maintain the soil moisture required for seed germination. Cover soil should not be too thick, otherwise the seedlings will be unearthed. Under the conditions of suitable humidity and temperature, the seeds can be germinated and unearthed within 3-5 days after sowing, and the seedlings can be produced in about 10 days. After sowing, the seedlings should be flushed and the head water should not be poured before the seedlings come out in order to avoid soil compaction and affect the seedlings unearthed.
(5) Management of seedlings between seedlings The management of seedlings is an important part of cultivating seedlings and strong seedlings. The main management measures include weeding, weeding, irrigation, seedlings, planting, and transplantation.
When the young seedlings of the young seedlings show the second pair of true leaves, the first time the seedlings are started, and the seedlings should master the principle of “between weak and retain strong†and “between close and thinningâ€. That is, the weak seedlings, diseased seedlings, and retained seedlings should be removed and the seedlings should be kept short of seedlings. The broken bed is transplanted to make up the seedlings to preserve the seedlings, and the seedlings should be equidistant between the seedlings with a spacing of 4-5 cm. Until seedlings grow to 3-4 pairs of true leaves is the second time the seedlings, spacing of 10 cm or so. About 18,000 strains were planted per acre. The thinning should be done after the irrigation or after the rain, when the ground is moist and not sticky. At this time, the soil is soft and should be thinned, which will help protect the seedling root system and improve the survival rate of transplanting. After the seedlings and the supplementary seedlings, timely irrigation should be done to avoid leaving the soil void and affecting the survival and growth of the seedlings.
2 Loose soil weeding and top-dressing irrigation shall loosen soil immediately after rainfall or irrigation. Releasing the soil should be shallow, and the flower surface can be broken. With the gradual growth of the seedlings, the depth is deepened so as not to hurt the seedlings.
Diseases and insect pests control pests mainly include 榆 Zijin 虫, 榆 Tianshe 蛾, 榆 蛾, black velvet beetle and so on.
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