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Syringa plants are often exposed and often used as landscape trees in gardens. When planting, choose a sunny place with loose soil and good drainage. Generally bare root before spring sprouting, plant spacing 2-3 meters, can also be adjusted according to configuration requirements. Choose 2 to 3 years old seedlings when planting. Planting holes 70-80 cm in diameter and 50-60 cm in depth. 1000 grams of fully cooked organic fertilizer and 100-600 grams of bone meal were applied per hole, and the soil was thoroughly mixed with the soil as base fertilizer. After the planting, permeate the water once every 10 days, and continue pouring 3-5 times. Every time after watering, you must loosen the soil to improve the soil temperature and promote the rapid growth of new roots. Planting 3-4-year-old seedlings, after the planting, the branches on the ground should be severely pruned, that is, they should be cut from the ground at a distance of 30 cm. After harvesting, strong branches will grow quickly and the crown will be full. The next year will be sufficient. Bring out the luxuriant flowers. Daily management work is relatively simple. Generally pruning before the spring sprouting, the main cut thin branches, over dense branches, dead branches and diseased branches, and reasonable retention of good update techniques. If you do not retain the seeds, remove the residual spikes after flowering. Generally do not apply fertilizer or only a small amount of fertilizer, avoid too much fertilization, otherwise it will cause leggy, thus affecting the formation of flower buds, but to reduce the flowering. However, after flowering, some phosphorus, potassium, and nitrogen fertilizers should be applied. Each phosphorus and potassium fertilizer should not exceed 75 grams, and 25 grams of nitrogen fertilizer can be added. If applying manure or compost, it must be thoroughly cooked and evenly mixed with the soil, and each plant should be applied in an amount of about 500 grams. Irrigation can vary from region to region. In Beijing and North China, April-June is a drought and high-temperature season. It is also the season in which clove grows vigorously and blooms. Therefore, it is necessary to pour 2-3 times a month for permeate, and immediately cultivator after pouring. Paul. When entering the rainy season after July, it is necessary to pay attention to drainage and flood prevention. Fill cold water before winter in mid-November.
Artificial breeding
For the selection of artificial cross-breeding parents, the goal of breeding should first be established, and the parents with the target characteristics should be selected, and the feasibility of cross-breeding should be determined through an affinity test. The actual operation must go through a series of strict operations such as detasseling, artificial pollination, bagging, tagging, seed collection, preservation and sowing. In order to fully reflect the target traits, hybrid offspring must ensure that at least a thousand plants are needed to ensure seed selection. It usually takes at least 5-10 years from cross-pollination to denomination of new varieties.
Cultivation techniques of cloves
Breeding