In order to rapidly cultivate Ginkgo biloba seedlings, practice has shown that Ginkgo biloba shoots are cut in summer, and new shoots are used for cuttings in spring to shoot cuttings. This breeding method can preserve the heredity of the excellent characteristics of the mother tree, at the same time, it is easy to identify the male and female mother plants, and save seeds, so as to cultivate a good way for the early seedlings of the improved seedlings. Introduce the technical points of the tender shoot cutting seedlings are: First, select the cuttings. In the early June to early August, the ginkgo shoots were basically capped, but the new shoots were not lignified. The semi-lignified long shoots were cut at the outer upper part of the canopy for cuttings. The place where the mother tree grows is cut by 10 cm in the cuttings, and the upper part of the cutting blade retains 2-3 leaves, the lower leaves are removed, and the lower end is cut into the shape of a horse ear. Second, the plug system. Wherever possible, pure yellow sand can be used, and in the mountains, yellow loam can be newly dug. The general length is not limited, the width is 1 meter, the height is 0.3 meters, and the width of the trail is 0.3-0.35 meters. In order to keep the bed surface moist and reduce the evaporation of water, bamboo bows can be used to bend the bed in the same width as the bed, cover a layer of plastic film, and finally take a 1.6m shed. After the bed is made, 0.1% potassium permanganate solution or 10 kg of ferrous sulfate per acre is dissolved into a 30% aqueous solution for soil disinfection. Third, cutting standards. The cuttings were soaked with 100 ppm ABT rooting powder for one hour. The depth of insertion was 1-2 buds on the soil. The rest was all inserted into the soil with a spacing of 610 cm. Fourth, field management. The management of ginkgo twigs and cuttings in the field is mainly covered grass, irrigation, fertilization and other processes. As the seedlings grow and shoot, the light intensity should be gradually increased, and the light transmission intensity should be increased by 50% after one month, which can improve the photosynthesis ability. By the end of September, when the temperature drops, the sunshine will gradually become weaker, and the sheds can be completely removed. By mid-November, the large seedlings can be grown and cultivated.
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