Sandy loam is suitable for the nursery for breeding seedlings. The depth of soil should be more than 80 cm. Deep plowing or artificial deep plowing should be used to make the living soil layer reach 30-40 cm. The soil fertility is better, irrigation conditions and drainage are good. Avoid lots of tuyere. The former should be crops, vegetables, can not use fruit trees, trees and mouthwash, do not waste the beach, saline land, soil salt content of less than 0.2%, PH value of less than 7.5. When the soil is sticky, sand or yellow silt can be used to improve the nursery or plunging holes.
It is advisable to apply 5,000 kg of rotten manure per acre before planting in the winter before planting (if applicable, 50 kg of phosphate fertilizer may be added). Divided into 20-square-square or 20-meter-long, 30-meter-wide rectangular blocks. Stay 1 meter of roads for ventilation.
Leveling from 5 centimetres low to facilitate summer drainage and flood control; For spring cuttings, cover the film for 10-15 days to increase the ground temperature and maintain the humidity. The requirements are consistent, high-level, smooth surface, ensure uniform watering, uniform humidity, and seedlings grow neatly.
Cut the long strips into standard cuttings of 18 cm before cutting, and ensure that each cutting has at least one full and full bud on its upper end; Soak the cuttings with water for 12-24 hours before inserting. Paraffin liquid can be used to seal the upper cut.
The nursery of the propagation afforestation seedlings, cutting density can be generally about 3600 or so, to survive, the rate of 85% of the success rate, 3000 seedlings per acre can produce around. Single row cuttings, row spacing 70 cm, spacing 26 cm.
Nursery for propagation cuttings, cutting density should be more dense than the afforestation seedlings, generally mastered 4000 per mu. In order to facilitate the operation management of the nursery, large and small rows can be set.
During cuttings, the cuttings are inserted into the soil vertically or slightly to the north. The first bud on the top is flat with the surface of the ground, and the buds are all faced to the south so as to check the survival.
In the case of adequate mulch and membrane coverage, spring irrigation is generally no longer irrigated when temperatures are low in March after irrigating. The survival rate of the cuttings after germination was checked, and excessive germination was erased. In the winter and early summer, when there is a lot of drought, it is necessary to check the sensation promptly and timely irrigation. For long-term continuous drought without rain, the irrigation cycle is generally 7-10 days, and the relative humidity of the soil should generally be maintained at about 80%.
Field inspections should be conducted promptly after cuttings, and whether there are inverted, too shallow or too deep cuttings, trampling injuries, and those who have apparently died are necessary. If necessary, spare cuttings should be prepared in advance.
The cuttings used for the propagation of seedlings were cut in mid-November before cutting into the winter; the spring cuttings were generally cut in February of the following year. According to the remaining pile density, 3-5 cm of cuttings can be left, so that the remaining piles continue to breed cuttings. After the cuttings are cut and cut in the local area, they should be buried in the original length or cut into wet sand for cuttings. Shipments to other places can be cut to a length of about one meter. Seedlings and cuttings should be packaged during transportation, avoid sun exposure, high temperature and dryness. After arriving at the destination, they should be buried in a cool, shady place on the day and buried in wet sand to prevent desiccation or waterlogging.
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