technique of sowing and seedling raise of Chinese parasol tree in spring (II)
Seedling management
1. After loosening soil and weeding and sowing, a large number of dicotyledonous weeds such as Rabdosia mongolica, Artemisia mongolica, amaranth and other dicotyledonous weeds will breed, which can be removed manually or sprayed with 2.4mer D. Weeding should be based on the principle of "getting rid of small, early, except", and the thickness of loose soil is 2 to 3 cm.
2. Fertilization irrigation when the seedling height is 3 to 5 cm, compound fertilizer is applied 8 to 10 kg per mu, combined with irrigation, and then watered according to soil moisture.
3. In the prevention and control of sycamore seedling stage, attention should be paid to the prevention of seedling blight, such as early sowing, high ridge seedling raising, soil disinfection, and spraying 5% carbendazim every 10 days (three times in a row). Good results can be obtained. There were few other diseases and insect pests, and no harm was found.
4. Container seedling management transplanting when the height of the seedling is 5 cm and the base of the plant is semi-lignified. Before transplanting, make a border of length × width = (15 to 20) × (2 to 3) meters. When transplanting, the container was removed and transferred to the border together with the culture medium. The row spacing was 20 × 40 cm, more than 8300 plants per mu. Then irrigate once, apply urea once in July, use 8 to 10 kilograms per mu, and then irrigate according to soil moisture.
5. the seedlings should be irrigated with frozen water in the middle of November before the beginning of winter, and then bury the soil to prevent the cold or fake planting indoors.
Through the above measures, sycamore seedlings can reach 40 to 60 centimeters in height in the same year, and 3 to 4 years later, with a height of 3 meters and a diameter of 4 to 5 centimeters, can be used for urban and rural greening.
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Cultivation of Chinese parasol trees
Chinese parasol tree, also known as green tung tree, is a deciduous tree belonging to parasol family. Crown oval, trunk end straight, bark green smooth, lateral branches stout, emerald green. Chinese parasol tree is a positive tree species, like warm and humid climate, widely distributed in China, cold resistance is not strong, in acid, neutral and calcareous soil can grow. Deep root sex, ponding easy rot root, suffer waterlogging 3 to 5 days to be able to die in high temperature season. It grows fast and has a long life. Leaves grow late, leaves fall early. Leaves, flowers, roots and seeds can be used as medicine, seeds can also be fried food and oil. Common seeding method of reproduction
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The method of sowing and raising seedlings of sycamore in spring
Indus is a deciduous tree of the genus Indus of the family Indus with straight ends and green bark. It is an excellent street tree species and has been widely used in urban and rural greening in recent years. Through several years of practice, the author has explored a set of techniques for raising seedlings by spring sowing of sycamore, which is introduced as follows: the sowing time can be carried out in Beijing Plain from late March to early April after soil thawing in spring. The soil is prepared to turn the soil 30 cm deep before sowing, remove weeds, roots and other sundries, and then do ridges or bed and soil disinfection to do ridges and bed sycamore seedlings should be raised in high beds and wide ridges.
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