The latest course on planting techniques and methods of Toona sinensis

Ailanthus tree, also known as Ailanthus bark, large fruit Ailanthus, etc., is an arbor plant of Ailanthus genus of Asclepiaceae. Its trunk is straight and tall, its crown is round like hemisphere shape, quite spectacular, its leaves are big and shady, and its autumn red fruit is full of trees. Although its leaves and flowers have a slight odor, it is not serious, so it is still a good ornamental tree and shade tree. Let's take a look at the planting technology of Ailanthus tree together.

Ecological Habits of Ailanthus altissima

Ailanthus altissima likes light, does not tolerate shade, adaptability is strong, except clay, all kinds of soil and neutral, acid and alkaline soil can grow, suitable for deep, fertile, wet sandy soil. Hardy, drought resistant, not water wet, long-term water will rot root death. Deep roots, strong resistance to smoke and sulfur dioxide, fewer pests and diseases. In addition to Heilongjiang, Jilin, Xinjiang, Qinghai, Ningxia, Gansu and Hainan in China, they are distributed everywhere and widely cultivated all over the world.

Propagation Technique of Ailanthus altissima

Ailanthus tree is generally propagated by sowing. When the wing country matures, even the twigs are cut together. After drying and removing impurities, the germination force can be maintained for 2 years. Soaking seeds in warm water at 40℃ for a day and night before sowing can germinate 5~6 days ahead of schedule. The sowing rate is 5~8 kg per mu, the row spacing is 25~40 cm, the soil cover is 1~1.5 cm, and the germination rate can reach 85%. The suitable temperature for seed germination is 9~15℃, and sowing is generally carried out from early March to late April. Annual seedlings are 60 - 100cm tall and 0.5 - 1.5cm in diameter. In addition, can also be used to divide and root cutting propagation. As a street tree with large seedlings, the trunk is straight and the branch point is high. Generally can be in the second year of seedling spring for flat stubble, after the timely removal of lateral buds, so that the trunk continues to extend, to reach the height of the stem and then let the lateral branches develop crown. Transplanting in spring should be carried out when the upper strong buds of seedlings expand into spherical shape, and should be properly planted deeply.

Planting Technique of Chinese Ailanthus Tree

1, planting afforestation: spring and autumn can be planted, the key is to grasp the appropriate time and deep planting. Spring afforestation should be planted early, when the volume of strong buds on the upper part of the seedling trunk increases and is spherical, and the depth should exceed the root neck by 2~3 cm. Level ditch or fish-scale pit can be used for soil preparation on the mountain, and hole-like soil preparation can be used in areas without concave and convex. Afforestation density is not suitable for too large, ordinary plant spacing is 1×2 meters. Root hole length, width and depth of 40 cm. Dry and windy places should be used to cut off afforestation, buried soil depth in early spring more than 15~18 cm, the upper end and the soil surface level or exposed surface 1 cm.

2. Direct seeding afforestation: The survival rate of direct seeding afforestation is high on shady slope and semi-shady slope, and the afforestation time is implemented in spring, rain and autumn. Spring under the general in the rainy season seedlings, without germination treatment of ovules easy to survive. Spring sowing in rainy season, although the ground partially dry in winter, but the next spring can still sprout from the roots. Ditching is parallel to the outer edge of the fish scale pit on the reverse slope, and the seeds are planted on the outer platform in the way of inner ditch and outer platform. The width of the ditch is 5~6 cm, the depth of the ditch is 3 cm, 40~50 seeds are planted under each ditch, and the soil is covered with 1.5~2.0 cm. The seed amount per mu is 0.5 kg.

3. Nurturing management: after 1~2 years of afforestation, the tree height will reach 2~3 meters every autumn or spring. In April ~ May, a strong bud will be selected and cultivated for years. When the tree height reaches the required height, the bud will be stopped, so that the height will gradually weaken and the DBH growth will be improved. In the third year of direct seeding afforestation, the young plants derived from trees have the phenomenon of competition for glory and fertilizer. In order to ensure the rapid growth of dominant plants, weak seedlings must be removed as soon as possible. Common site conditions are good, seedlings grow fast, thinning time should be early, intensity should be large, on the contrary, thinning time is late, intensity is small.

4. Disease and pest control

1. Ailanthus altissima: In winter and spring, cocoons and pupae are found on treetops and trees. Check under the tree insect droppings and tree victims, found larvae artificial vibration branches kill. Larval stage can be used 2000 times of 2000 times. Light traps adults.

2 Spotted clothing wax cicada: winter scrape off the egg mass on the tree. Mixed forest should be established in pure forest with serious damage. Do your best to take care of enemies such as parasitic bees that use locusts. For adults and locusts, spray with 20% phoxim EC 1500~2000 times or 50% monocrotophos aqueous solvent 2000~3000 times or 50% phoxim emulsion 2000 times or 40% dimethoate EC 1500~2000 times.