The breeding of Chinese golden leafhopper

Chinese golden leafhopper is an excellent colorful leaf species of both Qiao and Guan irrigation. It has golden leaves, full crown, high resistance to cold and drought, and is a new variety of colorful leaf plants that China has successfully cultivated. Chinese golden leafhopper grows rapidly, branches densely, pruning with strong intensity, and rich in shape. It can be cultivated into trees, used as garden landscape trees, and cultivated into shrubs. It is widely used in hedgerows and ribbons. The Chinese gold leafhopper has a well-developed root system, is resistant to leanness, and has a strong ability to maintain water and soil. In addition to being used for urban afforestation, it can be used in a large number of landscapes to create landscape ecological forests and soil and water conservation forests. At present, there are two kinds of propagation methods, grafting and cutting, and grafting is the main method. Chinese golden leafhopper is a variant species of native species in China. It has the best affinity to white peony. Therefore, when cultivating seedlings of Chinese goldenleaf, it often uses white peony as rootstock for grafting and breeding. The engineering seedlings can be directly cultivated by the high-branch grafting method using large-sized white peony as the rootstock, and the Chinese wolfberry seedlings can also be cultivated by grafting on the one-year or two-year-old seedlings. Grafting and grafting 1. High grafting: For the purpose of cultivating arborvitae. Grafting time is in the middle and early March. It is most suitable when the sap of the rootstock seedlings will begin to flow before germination. Rootstock and scion selection and treatment: Select main trunk straight through white seedlings with breast diameter of 3cm or more as rootstock, and then select the golden shoots of Chinese golden leaf to make scion after entering winter or just after spring, and cut the middle length of branches to about 6-8cm. 90 °C -95 °C of wax in the middle speed, so that the epidermis is covered with a thin layer of wax, and into the film bag in the cold or sand. Grafting method: 1) 劈 : : : : : : : : : : : : : : : : : : : 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 两 , 两 , ,. A wedge-shaped bevel with a length of about 2.5 cm makes the bud a little thicker and the other side slightly thinner. The noodle should be flat. Use a grafting knife to open the rootstock rakes, slowly insert the thick side of the scion into the rake, so that the outer layer of the root rakes and the outer layer of the scion form an accurate butt joint, and allow the rootstock to tightly clamp the scion. Generally, the two can be inserted at the same time. Root scion, thicker rootstock can be inserted into the "+" shape of 4 scions, and then tied with a 15-20cm long film strip from bottom to top. 2) Plug the skin: cut about two meters in the rootstock, flatten the mouth, select the smooth side of the bark, first with a grafting knife in the cross-section cutting a knife, into a small incline, and then in the central part of the slope cut a deep The vertical opening of the xylem, the incision length is slightly shorter than the large noodles of the scion, cut a 2-3cm bevel at the lower part of the scion, the cut surface requires thin and flat, on both sides of its back, shallow cut off the epidermis, and then face the large oblique surface of the scion The xylem, which is inserted along the incision of the rootstock, is suitable when the depth is slightly dew on the incision of the rootstock. The method of binding is the same as connecting. 2. Bottom connection: For the purpose of cultivating shrub-shaped gold leafhopper, it is suitable for the grafting of white peony root seedlings from one year to two years. The method is the same as above. Generally, only one scion is inserted on one rootstock, and it is tied well after grafting. Bud grafting was divided into budding in summer and budding in autumn according to the grafting time. The grafting site was divided into high grafting and bottom grafting. In the summer, buds are used for the purpose of cultivating finished seedlings and scion nurseries, and autumn budding is used for the purpose of cultivating semi-finished seedlings. 1. Buds in summer: Seedlings from white-billed biennial seedlings or annual mature seedlings. At the beginning of June, the full side branch was selected from the full-filled branches of the Chinese golden leafhopper. The grafting knife (requiring the sharpness of the grafting knife, sharpening once every 1-2 hours) was cut from the 1cm above the lateral branch to 2–2.5cm. The skin, without wood, then select a smooth part at about 5cm from the ground, cut away from the top and the same size of the bud, the bud and rootstock docking, plastic sheeting from the top The buds will be tightly bound. The key to operation is to choose the lateral branch size of the scion, the lateral branch is too thick, the side branch will not move when peeling, and the side branch will easily come out from the skin to make the bud failure; when the side branch is too thin, the scion will be too thin to be easy to handle even if it is cut off. The buds are too narrow to survive. If the cut buds are even and thick, even if they are wrinkled, they can still be used after leveling. This will not reduce the survival rate. Summer budding usually lasts until early July. During this period of time, the mucus was rich in mucus, and the scion and rootstock were easy to bind. The highest survival rate was 85% or more. 2. Autumn Buds: The time is mid-to-late August, and grafting methods are adopted in summer. At this point, the scion is not peeled off, and the bud grafting time cannot be too early or too late. It is easy to sprout early and not overwinter; when it is too late, the scion is not easy to heal and the survival rate is reduced. Cutting propagation of hardwood cuttings and cuttings takes place in mid-March. The cuttings can be cut before entering the winter before last year, and the strong points of 0.5 cm or more are selected, cut into 15-20 cm, tied and bundled, and sanded. Remove the cuttings before cuttings, wash the sand with clean water, and soak the lower part with ABT6 No. 100ppm for 2 hours. Generally can be directly field cuttings, row spacing 50cm, spacing 15cm, with the ditch with cuttings, cuttings slightly exposed on the ground, the soil is solid, covering the film, irrigated. The budding begins in early April. At this time, the mulch should be broken from the buds and the ground should be grown. Until the end of April, new roots will grow. Twig cutting and cutting time is in early July. It is easier to manage with full light fog insertion: cut the nearly lignified shoots of the year, cut into 15-20cm, cut the middle and lower leaves, retain the upper 4-5 leaves, tie tied into bundles, soak with ABT6 100ppm The lower part is inserted into the sand after 2 hours, and the density can cover the sand surface completely. Immediately after cutting, spray 3-4 times a day. If the temperature is too high, spray it at noon. The upper part of the sand table and the south and west half circles should be closed with a shading net. New roots can be grown in about 20 days.

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