Ginkgo tree has a beautiful tree shape and golden autumn leaf color. It is suitable for Tingyin tree, street tree, and tree-only tree. It is often used as the preferred tree species for landscaping. The following combination of my work practices, introduce its breeding methods and plant management. Reproduction Ginkgo biloba has many breeding methods. There are four methods: sowing, grafting, cutting and splitting. 1. Sowing seeds The best mother trees with a tree age of 80 years are the best. After the autumn seeds are harvested, they are piled up in a cool place, and the outer seed coats are rotted, rinsed with water and stored dry. It can be sowed in winter or in the spring of the following year (if spring sowing, sand germination must be carried out first), the seedbed should use sandy loam with good water permeability, sowing can be used for seeding or sowing method, cover soil 3-4 cm and compaction, Can be unearthed in 3 weeks. After emergence, more soil should be applied and Bordeaux mixture should be sprayed to prevent blight. The seedlings can grow to 15-25 cm in height. 2. Grafting Grafting is the main method for the propagation of Ginkgo biloba, which can advance the results and reproduce fine varieties. In general, the branch connection method or splicing method is used. Scions should be selected from 1-3 years old and strong twigs of young trees, with 4-6 short branches. It is better to use saplings below 5 years old as rootstock. 3. Cutting the branches from the year of May to June using the current branches, cut into 10 cm to 15 cm segment, leaving 3 leaves to 4 leaves, half inserted into the soil. Always spray water to ensure that the leaves do not dry. Shade before and after noon on sunny days. The leaves must be sprayed 2-3 times and rooted in about two months. If semi-mature branch cuttings are used, the current year's shoots will be taken in August and buried about 20 centimeters deep in the earth to be sand-trapped. The cuttings will be taken out at the end of March of the following year and will be able to survive in 2 months. 4. It is easy to sprout around the branches of the dried Ginkgo biloba stems, especially when the trees are 10-20 years old. In spring, buds can be used for propagation. The method is to excavate the soil around the roots, use a knife to cut the stalks with fibrous roots from the mother plant and plant them in the nursery, preferably 2 to 3 years old. This method is easy to survive. Planting Buy ginkgo seedlings, pay attention to two points, one is a tree, to select trunk straight, plump tree seedlings; Second, the root development, do not buy seedlings that have never been transplanted, because of its small roots are underdeveloped , is not conducive to survival of seedlings, to choose the white part of the xylem, root skin slightly red, straight, dwarf tree seedlings. Ginkgo biloba with a diameter of 5 cm or less can be planted in bare roots, and earthworms should generally be placed above 6 cm. The seedlings planted on bare roots were in the mild seedling stage, and the nursery stocks with soil were able to grow that year. When planting large trees, it is best to keep the seedlings in the original planting direction. This will shorten the recovery period of the seedlings and adapt the seedlings to the growing environment. Before planting, it is best to fill the pit with water. After the water in the pit has penetrated, the big tree will be planted in the pit for compaction, so that the water in the pit will come back to moisten the roots. Secondary watering should dig the ditch around the pit to fill the water, allowing the water to slowly penetrate the roots of Ginkgo biloba. Do not flood the flood so as not to drown. After the big trees are planted, they must use brackets to prevent the trees from being blown by the wind. Post-plant management 1. After watering Ginkgo biloba, there is no need to irrigate water regularly. Generally, the water is poured first before germination. In May, if the weather is dry, water can be poured for the second time to facilitate the growth and development of Ginkgo biloba. During the rainy season, water can be provided depending on weather conditions. Ginkgo is resistant to drought and drought, and it is necessary to pay attention to drainage during rainy days. Because the amount of respiration in the roots of Ginkgo biloba is large, root systems must be prevented from being rotted due to excessive water in the soil and lack of oxygen. 2. The fertilization in the nursery can be carried out in the spring and summer. In the spring, between 5,000 and 10,000 catties of organic fertilizer is applied per mu between the two rows, and then the soil is ploughed again with a small rotary tiller so that the fertilizer is evenly ploughed into the soil. in. Fertilizer in the spring can be applied once a year if the amount is large, and once in the middle of August if the amount is small. 3. Trim Ginkgo biloba without special trimming. Before transplanting, dry pruning can be carried out. At the same time, cut through branches, pests and branches, wounded and disabled branches and dead branches should be cut off. During its growth, due to slow growth, it is generally not trimmed. In the conservation process, we need to timely cultivating weeds, improve the ventilation conditions of the soil, promote root growth, and germinate new roots. The diseases and insect pests of Ginkgo biloba are rare. In the summer of high temperature and drought, the seedlings or new transplanted seedlings in the year, the base of the stem burns easily and the bacteria invade, and it is prone to rot disease after the rain. The prevention and control method is to set up shady sheds in summer. China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bio-pharmacies.com