Detailed explanation of planting techniques and maintenance methods of Robinia pseudoacacia

Robinia pseudoacacia is a relatively common tree species, which can be used to beautify the environment, purify the city air, and can also be used as raw materials for honey and wood. it can be said that it is a kind of plant "covered with treasures". So we should make more efforts to take care of it in breeding.

1. Sowing and planting techniques of Robinia pseudoacacia

1. The seedlings of Robinia pseudoacacia are afraid of waterlogging, cold and heavy rain, and like loose and fertile soil. The nursery should choose loose sandy loam soil, avoid heavy saline-alkali and Sun Zhong or soil with too high groundwater level. Soil preparation, application of basic fertilizer and soil disinfection should be done before raising seedlings.

two。 The seeds must be treated before accelerating germination and sowing. First soak the seeds in 60 Mel 70 ℃ hot water, pour hot water into the seeds, stir until they are not hot, soak for 1 day and night, and remove the floating shriveled seeds, bad seeds and impurities. Use a fine-eyed sieve to separate the dilated seeds from the hard seeds, then treat the unexpanded seeds with 80-90 ℃ of hot water as before. Each time the selected water-absorbing swelling seeds should be placed in a warm place with sticks and sand in time. After about 4-5 days, the seeds can be taken out and sown when the white root tips are exposed.

3. Sowing generally sows in spring and sows early at the right time, and the germinated seeds should be filled with sufficient bottom water before sowing. When the seed germination rate is 80%, the sowing amount per mu is 3-4kg. The operation mode is generally ridge or bed cultivation, ridge row spacing 15cm, sowing 3cmo bed row spacing 20-25cm cover soil thickness 1-2cm, suppression after covering soil. The seedlings were unearthed in 3-5 days.

Daily maintenance of Robinia pseudoacacia trees

1. Because the seed is unearthed for a short time, it is necessary to ensure that the soil and water is moist during the seedling period to prevent the emergence of similar hardening phenomenon on the ground, but it is also necessary to irrigate reasonably and not to soak and raise seedlings. After about 4 weeks, a pest control and weeding operation can be carried out, during which the weak leaves in the seedlings can be removed to ensure the photosynthesis during their growth.

two。 When the seedlings are close to 1 meter or so, the seedlings can be fixed, and then fertilized before July. Finally, during the growth of Robinia pseudoacacia, fertilization, irrigation, weeding and other operations were gradually reduced to ensure its natural growth.

3. The surviving Robinia pseudoacacia has strong adaptability, so there are no strict requirements for soil cultivation and afforestation methods. Once the young forest is formed, as long as fertilization, weeding and pest control are carried out regularly, the Robinia pseudoacacia forest can flourish.

4. The growth peak of Robinia pseudoacacia is in July, so it is most appropriate to apply fertilizer in June. No more irrigation after August to enhance Lignification and improve the ability of anti-draining and overwintering.

Third, the method of shaping and pruning Robinia pseudoacacia trees.

1. Under the condition of natural growth, Robinia pseudoacacia has strong branching power and exuberant growth, often forming a wide oval crown, but most of the trunks are low and have too many branches, forming "small old trees". Shaping is to straighten the trunk, and the lateral branches competing with the trunk should be trimmed from the first winter or the second spring after planting, until the trunk height is more than 6m after 5-8 years, reaching the civil material standard on time.

two。 The large seedlings of Robinia pseudoacacia used for landscaping are generally strong. The one-year-old branches that are strong and upright and at the top can be selected as the trunk to extend the branches, and then the apex of the shoots will be cut off and the weak branches will be re-cut. If there are small and weak branches near the shearing mouth, it is appropriate to cut off some of the branches, and the upper side branches are cut short one by one, so that the apex is not higher than the main shearing mouth.

3. After pruning, the strong and long branches on the trunk or main side branches should be coring or cutting; for the sparse branches at the base of the trunk and the top of the trunk that starts in winter, the new buds and sprouts should be cut off as soon as possible. Pruning should be carried out in summer, pruning should not be overweight, should be close to the trunk, do not leave stakes, so as not to form nodes. The use of tools should be sharp, the wound should be smooth, so that the branches should not split.

Robinia pseudoacacia can improve the soil, its leaves can also be used as feed for livestock, and the trunk can be used as a good industrial wood, and has a high ornamental value, so it is worth planting and breeding.