Written by Maggie
Feb 14 2021
Willow tree is a deciduous large tree, which has a history of more than 2000 years in China. Willow trees have slender, soft, drooping branches that can reach 20 to 30 meters high and 50 to 60 centimeters in diameter. Willow tree is a popular tree in modern gardening and greening because of its rapid growth, easy reproduction and strong vitality. It can beautify the environment and be used for materials.
Willow tree is light - loving, moisture - loving, cold - tolerant, and is a moderately wet tree. Some species are also more tolerant to drought and salt and alkali, and can also grow in harsh ecological conditions, especially in fertile plains. Willow tree generally has a lifespan of 20 ~ 30 years, and a few species can reach more than 100 years. Willow tree has a long growing period, sprout early and leave late. Some southern tree species are evergreen trees.
The genus Willow tree has the following morphological characteristics: trees or prostrate, cushion, erect shrubs. Branches are cylindrical, with the heart nearly round. No terminal bud, lateral bud usually adherent to branch, bud scale is simple. Leaves of Willow tree are alternate, sparsely opposite, usually narrow and long, mostly lanceolate, pinnately veined, serrate or entire; Petiole of Willow tree is short; Stipules, often serrate, often caducous, rarely persistent. It was found that the primary leaf was open and the primary leaf was open and the primary leaf was open and the primary leaf was thin and the primary leaf was open. Bracts of Willow tree are entire, glabrous or glabrous, persistent, sparsely caducous; Stamens 2-many, filaments free or partially or wholly fused; Glands 1-2 (ventral glands located between the inflorescence axis and filaments, dorsal glands located near bracts); Pistil is composed of 2 carpels, ovary sessile or stalked, styles of varying length, or absent, simple 1 or divided, stigma 1-2, divided or undivided. Capsule 2-valved;The seed is small.What a dark brown.
Willow tree is suitable for a variety of different ecological environments, regardless of high mountains, plains, sand dunes, polar regions can grow Willow tree. Willow tree is mainly distributed in temperate regions of the northern hemisphere. Dryland willow is found in the plains of North, Northeast and Northwest China.
Willow tree cutting is in early spring, choose fast growth, few diseases and insects of good plants as the mother tree, in the bud before cutting 2 ~ 3 years old branches, cut into 15 ~ 17 cm long cuttings. Cuttage row spacing 20×30 cm, straight, fully watered after insertion, often keeps the soil moist, timely bud and weeding, root after applying topdressing 3 ~ 4 times, seedlings vulnerable to weevil, aphids, willow leaf a harm.
Seeds of Willow tree are harvested in spring and planted as they are picked. Seed 1000-grain weight 0.4 grams, germination rate 70 ~ 80%, mu of sowing about 0.25 kg, the seedling height 80 ~ 100 cm. Transplanting should be carried out in the winter after falling leaves to the next year before the early spring buds have not sprouted, after planting to fully water and erect pillars.
Willow tree star longhorns, light shoulder longhorns eat branches, moths, plum leaf, willow leaf, cicada and other harmful branches and leaves. Willow leaf can be in a 4 ~ 6 months harm period with trichlorfon 600 times or phoxim 1000 times spray kill. Green-tailed silkworm moth also harms the leaves, preventing and controlling the same snow willow.
Willow tree disease and insect pest control: leaf eating pests, such as moth, chafer, etc., can be used avermectin or single 1500 ~ 2000 times liquid, BT500 ~ 800 times liquid, spray.
Willow tree dry-worming pests: mainly longhorns, the larval stage thousands of poison sticks, can also be used in the larval stage with 15% insect line Qing 300 times liquid for high pressure spray control.
Willow tree is a beautiful ornamental tree. In addition, Willow Tree material is light, easy to cut, no deformation after drying, no special smell, can be used for construction, pit wood, box board and match stem materials; Willow tree has a high content of wood fiber and is used as raw material for papermaking and artificial cotton. Willow and willow branches are good firewood; There are a variety of wicker cane woven baskets, boxes, hats, etc.; Willow leaves can be used as fodder for sheep and horses.