Cultivation technology of tomentosa, planting and cultivation technology of aspen trees

Populus tomentosa. It is a common broad-leaved tree in northern China, with strong adaptability, strong resistance to stress, rapid growth, and can be used for the management of desertification areas and urban greening, so it is deeply loved by people. Below I will introduce the planting method of tomentosa.

1. Populus tomentosa is generally transplanted in March and April, and annual seedlings with a height of more than one meter are selected, and attention is paid to the crown width of the sapling, which should generally be kept balanced, and the root system of the sapling should be intact and not injured, and the roots should be cut off slightly.

2. Soil and fertilization.

The growth of poplar tomentosa requires sufficient nutrients in the soil, so it is necessary to choose a place with fertile soil, good drainage and good ventilation when selecting a site. After site selection, a clear planting area can be cleared, high-efficiency fertilizer can be applied, and when the root system is well grown, transplanted to a new place.

3. Planting. 1.The depth of the planting hole should be appropriate, and it is recommended that the depth of the planting hole should be level with the root neck of the seedling.

2.When planting, keep the seedlings vertical, roots, and one hand holding the dried mycorrhizae. 3.

After the planting is completed, the soil should be compacted to ensure the close combination of the root system and the soil. 4.Finally, water the saplings so that they can grow.

Fourth, maintenance. 1.Poplar tomentosa needs to be well hydrated, especially in the first month of transplanting, and it is important to pay attention to watering to ensure the growth of seedlings.

2.During the growth of the sapling, it is necessary to carry out comprehensive management and prune the trunk and branches in time. At the same time, it is also necessary to protect the trees from insect and bird infestations.

The above is the planting method and precautions of poplar, I hope it can be helpful to friends who need to plant poplar trees. Although poplar tomentosa grows quickly, it should also be carefully planted to ensure the quality of planting.

The excellent varieties of male Populus tomentosa were selected to cultivate seedlings. Transplanting should be carried out in early spring or late autumn, and appropriate deep planting; Cultivate seedlings with a diameter at breast height of 4 6 cm, with a planting density of 500 800 trees and 667 square meters, and the seedlings can be sold after 3 years, and the bed seedlings will continue to cultivate large seedlings; Do not use the way of "pulling out large seedlings" out of the nursery, cultivate seedlings with a diameter of 7 8 cm at breast height and plant 200 300 trees 667 square meters, crown height ratio 3:5, leave 3 main branches in each layer, leave about 9 main branches in the whole plant, and keep the main trunk straight; Because poplar likes large and fat water, it is also prone to pests and diseases, so it is necessary to strengthen water and fertilizer management and pest control.

Pests and diseases. Poplar tomentosa occurs mainly in the base and middle of the trunk, with longitudinal fissures ranging from a few centimeters to several meters, a width of 1 3 cm, exposing the xylem, and when the cracks are first formed, they manifest as mechanical injuries. After the trees sprout in spring and March, healing tissues are gradually produced, but most of them do not heal completely.

When the sap flows, the sap keeps flowing out of the wound and gradually turns into a reddish-brown mucus with a peculiar odor. Broken abdomen often causes poplar red hearts. This phenomenon occurs when the tissue is already cracked, and the crack extends inward and up and down.

P. tomentosis is a physiological lesion directly induced by wounds, and xylem discoloration is the result of a series of physiological and biochemical reactions.

Under the condition of pure forest, the temperature change in the forest is much smaller than that outside the forest, and the trees in the forest are not susceptible to the sudden change of temperature at low temperature and freeze cracking. Due to the influence of external temperature changes, forest edge trees are prone to freeze cracking, and the incidence rate is also high. In general, the disease rate of trees in the forest is 2 8 percent, while that of the edge trees is 14 3 percent.

In terms of tree density, the disease was severe in sparse forests and mild in dense forests. There are scattered trees on the four sides, and the damage rate is high if the management is poor. Close to water sources and places with high humidity, the incidence of diseases is low.

Prevention and cure. 1. The development of the right tree in the right place. Choose woodland with thick soil for afforestation to create pure or mixed forests with appropriate density. Shaded or semi-shady slopes should be selected for mountain afforestation to reduce the amplitude of temperature changes.

2. Strengthen tending management, improve tree potential, and enhance the stress resistance of plants.

3. Before the arrival of the cold snap in winter, the trunk is painted white or covered with grass to prevent freezing.

4. In early spring, the wound can be flattened with a knife to facilitate early healing. Strengthen the prevention and control of pests and diseases, and protect the trunk to avoid mechanical injuries caused by humans, animals or other reasons.

Seedlings: In spring, it is advisable to plant in early March to before budding. Fill enough water to replenish the water of the tree body within a week before the seedling, and the root width size of the seedling can be 5 8 times the diameter of the seedling when the seedling is raised, and it can be planted without soil balls and bare roots.

When the seedlings are raised, the roots are cut off with a saw or sharp axe to prevent splitting, and then the wound is smoothed with a knife to facilitate rooting. After the tree is planed out, the trunk is retained at 2 2 5 meters according to the requirements of greening design, and the main branches are truncated at 50 80 cm (leaving the main trunk 4 5 meters high, the second layer of the main branch, and the main branch is repaired). Wrap the trunk with mulch, or wrap it with straw rope.

The wound is applied with lacquer or alum shilin to prevent moisture loss. During transportation, avoid touching the bark and splitting the main branches.

Digging pits: The size of the pit should be enough to fit into the roots of the tree, and the depth should be 10 15 cm above the original soil mark.

Planting: Seedlings are planted immediately after they arrive, and the second solution of rooting powder can be applied to the incision of the roots before planting to promote rooting, when planting, the seedlings are put into the pit to be straightened, and the gaps along the roots of the tree are tamped with wooden sticks while filling the soil, until they are filled to the level with the ground.

Watering: After planting, the weir should be coffered, and the water should be poured once. After irrigation, it should be thoroughly inspected and fixed with a brace. Fill it again after two weeks, and then build a mound to moisturize. Later, depending on the drought of the soil, the pier can be watered.

Populus tomentosa. It is a common tree plant that is often used as a landscaping or windbreak plant in northern China. One of its most distinctive features is the leaves of the tomentosus aspen, which is both beautiful and special in its heart-shaped shape.

The leaves of Aspen tomentosa usually have a broad heart-shaped shape, 5 8 cm long and 3 5 cm wide. The leaf color is pale green, the surface is smooth, smooth, shiny, and the leaf margin is slightly curved downward, with some serrations. In addition, there are many white hairs on the back of the leaves of the tomentos, which is also the origin of its name.

The leaf surface of poplar tomentosa is relatively smooth and thick, so it has a certain wind resistance. The leaves of the tomentosus are alternate on the branches, the petioles are short, not easy to break, slender and flexible, which is easy to carry on the branches, and can sometimes be used to make handicrafts or straw mats.

Aspen tomentosa is a beautiful and practical garden plant, and its leaves are both beautiful and have shading and windproof effects, so it has been widely used in urban greening. In addition, the wood of poplar is hard, durable, and insect-proof, and can be used in furniture, buildings, bridges, etc., so it is also one of the important economic tree species in China.

<> poplar long branches and leaves broadly ovate or triangular-ovate, 10-15 cm long and 8-13 cm wide. The apex is short and acuminate, the base is heart-shaped, the margins are deeply toothed, and the petioles are 3-7 cm long. The short branches and leaves are 7-11 cm long and wide, and the petioles are slightly shorter than the leaves.

Populus tomentosa is a large tree plant of Salix family and poplar genus, with a plant height of up to 30 meters.

<> poplar long branches and leaves broadly ovate or triangular-ovate, 10-15 cm long and 8-13 cm wide. The apex is short and acuminate, the base is heart-shaped, the margins are deeply toothed, and the petioles are 3-7 cm long. The leaves are 7-11 cm long and wide, the petioles are slightly shorter than the leaves, and the apex is without glandular points.

1. Growth habits.

Populus tomentosa is a deciduous tree plant of the family Salix family, which can reach a height of 30 meters. It prefers to grow in mild plains below 1500 meters above sea level. Its root system is relatively deep, and it has the characteristics of drought tolerance, cold tolerance and barren resistance.

When water and fertilizer are sufficient, the growth rate is particularly fast.

Third, the role of value.

Populus tomentosa has a certain economic value, it contains rich fibers, can be used for construction, furniture, boxboards and matchsticks, papermaking and other materials, is the raw material of man-made fibers. In addition, the poplar tomentosa has good material, fast growth, long life, majestic posture, beautiful crown, and is an excellent garden greening or street tree.

Fourth, the classification of varieties.

There are several varieties of tomentos, such as the leafless tomentosa, which has a dense canopy and grayish-green bark that grows faster than the tomentos. The crown of the poplar is long and narrow, and the side branches hug the main trunk, and it can grow into a towering tree with a height of 20 meters and a diameter of 30 cm at breast height after 23 years.

Summary. Hello dear <>

It is good to plant poplar more than 50 meters away from farmland, aspen is an adaptable tree species that can grow in different environments. Generally speaking, the following factors need to be considered when it is appropriate to plant poplar from the farmland:1

Land use: If the farmland needs to be fully utilized, poplar can be planted far away from the farmland so as not to affect the growth of crops. 2.

Wind direction: Populus alba is a wind-tolerant tree species, but if it is planted close to farmland, it may cause wind damage to crops, so wind direction and wind force need to be considered. 3.

Soil conditions: Populus alba does not have high soil requirements, but if the soil quality is poor, it may affect the growth of crops, so it is necessary to choose the appropriate planting distance according to the soil conditions. In general, it is recommended to plant poplars more than 50 meters away from farmland to avoid affecting crops.

However, the specific planting distance needs to be adjusted according to the actual situation.

The distance from the farmland is appropriate.

Hello dear <>

It is good to plant poplar more than 50 meters away from farmland, and poplar local branches are a highly adaptable tree species that can grow in different environments. Generally speaking, how far away from the farmland is suitable for planting, the following factors need to be considered: 1

Land use: If the farmland needs to be fully utilized, poplar can be planted far away from the farmland so as not to affect the growth of crops. 2.

Wind direction: Populus alba is a wind-tolerant tree species, but if it is planted close to farmland, it may cause wind damage to crops, so wind direction and wind force need to be considered. 3.

Soil conditions: Populus alba does not have high soil requirements, but if the soil quality is poor, it may affect the growth of crops, so it is necessary to choose the appropriate planting distance according to the soil conditions. Generally speaking, it is recommended to plant poplar at a distance of more than 50 meters from farmland to avoid affecting crops.

However, the specific planting distance needs to be adjusted according to the actual situation.

Pro-<> poplar is a common deciduous tree with the following characteristics:1Grows fast:

Populus alba grows very fast and can grow into tall and filial trees in a short period of time. 2.Cold and drought tolerant:

Populus alba is highly adaptable and able to grow in cold and arid environments. 3.Salt and alkali resistance:

Populus alba has strong adaptability to saline-alkali land and can grow on saline-alkali land. 4.Resistant to pollution:

Populus melano is highly resistant to pollutants and can grow in highly polluted environments. 5.Timber excellent brigade discreet limbs:

The wood of poplar is hard and clear-grained, making it an excellent building material and furniture material. 6.Landscaping:

The poplar tree has a beautiful shape and silvery-white leaves, which can beautify the environment and improve air quality. 7.Wide range of applications:

Populus melanosus has a wide range of applications, and can be used for afforestation, shelter forests, scenic forests, urban greening, etc.

Grafting is divided into budding and cleave. Poplar varieties that are easy to root, select the strong poplar seedlings born in the year as rootstocks, from late August to early September, embed buds on the rootstock seedlings or with xylem with buds, graft a poplar seed bud every 15-20 cm, wrap tightly with plastic strips, cut the seed strips in winter and store them in sand, and take cuttings in the second year. Generally speaking, the common ways of plant reproduction in our lives are sexual reproduction (i.e., seed reproduction), spore reproduction, and asexual reproduction.

For Populus tomentosa, because there are more males than females in nature, and the flowering period of male and female plants is different, seeds cannot be collected in most areas, so vegetative propagation is often used. In order to meet the needs of seedlings for afforestation, the main seedling raising methods of Populus tomentosa are grafting, rooting, planting and cuttings. In production, the most commonly used method is grafting seedlings.

Poplar tomentosa cuttings are not easy to root, and the survival rate is generally less than 50%. In recent years, cuttings propagation experiments have been carried out in various places, and a lot of experience has been obtained.

For example, in the nursery, use tiller cuttings, use thick cuttings at the base of the annual slender young and strong mother tree, or soak the base with ABT rooting powder to strengthen the water management before and after rooting, and the survival rate can reach more than 90%. Populus tomentosa is widely distributed in the middle and lower reaches of the Yellow River Basin. Female plants are most common in central Henan Province, followed by Shandong Province, and are few in other regions.

Female plants were introduced in Beijing. Type specimens were collected from the central nurseries of Nankou, Beijing and Xijiaozi in Huxian County, Shaanxi Province.

Beginning in 1996, slender cuttings were collected in early spring, soaked for 3 10 days, then cut the cuttings, and then sealed the upper end of the cuttings (about 1 3 of the cuttings) with wax, cut off, and carried out routine moisture management. The survival rate has remained stable at 90% for many years. This is mainly because the wax sealing of cuttings effectively reduces the water transpiration of cuttings, which is conducive to maintaining the water balance inside the cuttings.

Under the condition of pure forest, the temperature change range in the forest is much smaller than that outside the forest, and the trees in the forest are not easy to be frozen by sudden temperature changes at low temperatures. Due to the influence of external temperature changes, trees at the edge of the forest are prone to freezing and cracking, and the incidence rate is also high.