The fast-growing Phyllostachys vulgaris is very good, as long as water and fertilizer are sufficient, the growth is very good.
The maintenance and management of the paulownia: In the following, we will introduce the common knowledge of the daily maintenance and management of the paulownia, the fertilization technology of the paulownia, the pruning precautions of the paulownia tree in the greening project, the winter pruning of the platanus and how to spend the winter dormancy period of the paulownia.
Common sense of Fatong maintenance and management
Pay attention to pruning when transplanting, and the crown of the tree must be pruned to different degrees to ensure the balance of water metabolism.
After transplanting, wrap the trunk with straw rope or film to moisturize the tree until the tree is alive. Because the epidermis is thin, water is easily lost through the epidermis. This can avoid direct sunlight and dry hot wind to reduce water evaporation. Protect the moisture in the tree before roots grow. 5. After transplanting, the large seedlings should be framed and fixed with supporting wood to prevent the roots from loosening. The planting pit should be large, the river sand should be laid under salt and alkali, the soil should be backfilled, and the water supply should be guaranteed after planting.
Main points of maintenance Because of its strong adaptability and extensive management, Fatong does not require special care. Its maintenance can refer to other northern deciduous tree maintenance methods, but in daily maintenance, we must pay attention to the following points: 1. Although the phyllot is highly adaptable in our area, it does not grow on the soil with high salt-alkali content and impermeable water. Well, this condition not only affects the survival rate but also prone to yellowing disease. It should be improved by replacing the soil, pulling the sand and pressing the alkali method. It is necessary to dig large tree pits and spread river sand underneath to isolate the salt and alkali. 2. The contradiction between the water requirements of trees and grasses affects the growth of the dead trees. In the landscape design, not only trees are planted in the green space, but also grass is planted. The water demand is different. The paulownia tree is not tolerant to waterlogging. After August each year, the water must be gradually controlled to facilitate the winter, but the lawn grass Do not lose water, otherwise it will wither, but if you continue to water until October, the root neck will be frost-damaged. The root neck will extend 30-40cm upward and form a long triangle, and the bark will become black and dry and sink. And it will become an intrusion port for pathogens and pests.
Therefore, water control in autumn is necessary. In daily management, the temperature rises quickly after entering May in our area, and the air is very dry in June. Rising temperature, sunburn, and dry hot wind can easily cause physiological diseases of Farton, so water the tree and spray water to moisturize the tree. Work cannot be less, and only in this way can the survival rate of the Fatong trees be guaranteed.
Fatong fertilization technology
Cultivating robust Phyllanthus vulgaris seedlings and implementing fertilization in the nursery is an important link. Fertilization during the growth of seedlings, often using effective fertilizers or decomposed organic fertilizers, timely supply of various nutrients required for different growth periods of seedlings to meet the growth needs of seedlings.
Fertilize according to the characteristics of fertilizer requirements in different growth periods of seedlings. Seedling growth is generally divided into four stages: seedling stage, seedling stage, fast-growing stage and hardening stage. The nutrient source of seedlings at the emergence stage mainly depends on the nutrients stored in the seeds. The seedlings in the seedling stage are more sensitive to nitrogen and phosphorus, and nitrogen fertilizer is generally applied to promote seedling protection and root growth. The fast-growing period is the period when the seedlings grow vigorously, which requires more fertilizer and water. The amount and frequency of nitrogen fertilizer can be increased, and phosphorus and potassium fertilizers should be applied in proportion to promote nitrogen absorption and seedling growth. At the hardening period when both the ground and underground parts of the seedlings are gradually lignified, it is necessary to prevent overgrowth, stop applying fertilizers, and improve the resistance of the seedlings.
Choose suitable fertilizer types. The topdressing fertilizer generally adopts effective fertilizer or decomposed human waste. The types of effective fertilizers used in nurseries are urea, ferric sulfate, ammonium chloride, potassium chloride, superphosphate, etc. Fertilizers must be completely crushed into powder and should not be applied in blocks. For nurseries that cultivate grass and flowers, avoid applying ammonium bicarbonate, because this fertilizer is highly volatile, especially when applied at high temperatures, and the volatile ammonia gas can easily burn the leaves of grass and flowers. If a large amount of ammonium bicarbonate is applied, it will make the seedlings grow tender and reduce the stress resistance.
Choose the appropriate fertilization method. Seedling top dressing can be divided into dry application and wet application. Dry application method is to apply fertilizer in furrow. The depth of furrow application should be in the distribution layer of the root system and around the roots of the fibrous roots, not close to the cadres. For seedlings with strong roots and far-reaching distribution, fertilization should be deep and large, such as Pinus tabulaeformis, Ginkgo biloba, Albizia julibrissin, Ailanthus altissima, etc.; for seedlings with shallow roots, such as flowering shrubs and paulownia, fertilization should be shallow and small. The wet application method is to apply fertilizer to water into a fertilizer solution and apply it evenly on the nursery ground. The characteristics of fertilizers should be mastered when fertilizing. Nitrogen fertilizer is highly mobile in the soil, and can penetrate into the root distribution layer with shallow application, and is easy to be absorbed by seedlings; potassium fertilizer has poor mobility, and phosphate fertilizer has worse mobility, so it should be applied deep to the root distribution of seedlings. When the fertilizer is used as a base fertilizer, the fertilizer effect is slower and should be applied deeply; the topdressing has a faster effect, and it is better to apply shallowly. The frequency and amount of fertilization are determined according to weather conditions. High temperature, more fertilizer absorption; low temperature, less absorption of seedlings. When the weather is clear and the soil is dry, fertilization is beneficial to the absorption of seedlings. In cloudy and rainy days, the roots of the seedlings absorb water slowly, not only the nutrients are not easily absorbed, but the fertilizer is also easily washed away by rain, causing waste.
Watch the seedlings fertilize. Fertilization measures are mainly determined according to seedling species, seedling age, seedling density and growth vigor. For example, conifers require more nitrogen and less phosphorus than broad-leaved trees. Generally, annual seedlings require more nitrogen and phosphorus in the early growth period to promote the growth and development of roots; in the fast-growing period, they need a large amount of nitrogen, phosphorus, potassium and other elements; in the late growth period, potassium is the mainstay and phosphorus is supplemented to promote young roots. The stem is lignified. Compared with nursery nursery, container seedlings cannot be applied with basal fertilizer, otherwise the concentration of certain elements will be too high, resulting in dead seedlings. Generally, only a proper amount of compost is applied, and the effect of top dressing is also good, that is, effective fertilizer is applied in combination with container seedling irrigation. The fertilization of container seedlings is usually a mixed fertilizer containing a certain proportion of nitrogen, phosphorus, and potassium nutrients, which is formulated into an aqueous solution at a concentration of 1:200, and sprayed or irrigated through the irrigation system.
Perform extra-root top dressing. Extra-root dressing is to spray an effective fertilizer solution directly on the leaves of the seedlings during the growth period of the seedlings, allowing the fertilizer solution to gradually penetrate into the leaves to synthesize the nutrients needed for the growth of the seedlings. Generally, the young leaves are older than the old leaves, and the back of the leaf absorbs water faster than the leaf surface, and the absorption rate is also higher. Therefore, the back of the leaves must be evenly sprayed when spraying. In the fertilizer for seedlings, the commonly used foliar fertilizers include urea, potassium dihydrogen phosphate and various foliar fertilizers. The concentration must be strictly controlled when using it to avoid burning the leaves. It is scheduled to spray on cloudy days or before 10 am and after 4 pm, so as to prevent the high temperature from quickly concentrating the solution, affecting the spraying effect or causing phytotoxicity.