2. Plant the willow into the tree pit, and the tree pit should not be too deep. Fill the bag with good soil and then compact it.
Water the willows once after planting and fill the bag with water. When the water seeps down, water it again. The second time, all the tree pits should be filled with water, and the lodging seedlings should be righted. Sometimes after watering, the soil in the pit will be washed away. If this happens, you can fill in more soil and compact it with the surrounding soil. It has been proved that watering twice every 15 days can be used for seedling raising.
4. In case of saline-alkali arid soil, before planting in the tree pit, it is necessary to apply absorbent resin to the roots of willow trees to keep the roots moist and meet the needs of growth and survival. Using asexual reproduction, the growth is fast and the sex is controllable. However, after several generations of asexual reproduction, the growth potential decreases, and diseases such as dead branches and premature aging are prone to occur.
5. Anoplophora glabripennis and Anoplophora glabripennis eat branches, and giant salamander, thorn moth, leaf beetle, willow beetle and grasshopper harm branches and leaves. During the damage period from April to June, trichlorfon or 1000 times phoxim can be sprayed, and abamectin or senle 100 times can be sprayed to kill moth and scarab.
According to the ancient legendary novel "Talking about the River", after Yang Di ascended the throne, he ordered the excavation of Tongji Canal. Yu Shiqi suggested planting willows on the embankment. Yang Di thought this suggestion was very good, so he ordered to plant willows on both sides of the newly opened Grand Canal and planted them himself. The imperial book named Yangliu as the surname and enjoyed the honor of sharing the surname with the emperor. From then on, the willow has the reputation of "willow".
Willow gets its name from the working method of willow head wood. Wood is still an indispensable material. In ancient times, tools were very simple, and it was very difficult to cut thick trunks, while it was more convenient to cut branches two inches thick. Therefore, the wood used by ancestors was mainly branches two inches thick. In the long-term use, people will find that after cutting off the branches, new branches can grow at the stubble, and the new branches are straight, which is more conducive to use. Among the native tree species in China, the ability of sprouting branches of willow is the most outstanding. Therefore, the first wood operation of willow was formed, and the crown was cut off at a certain height to promote the germination of new branches, and the branches were cut off every few years for use. The result of the first wood operation is to keep the trunk so as to continue to use the branches. This is why the willow tree got its name. The word "Liu" has the same pronunciation as the word "Liu", which means "Liu", which means a tree that keeps its trunk for reuse.
The principal value of willow is 1. Garden value.
There are many kinds of willows, which are easy to cross. Hybrid varieties have strong growth potential, strong adaptability and easy asexual reproduction. It can be selected from natural or artificial hybrid varieties, and excellent clonal varieties can be obtained through asexual propagation. In addition, a large number of high-quality seedlings can be obtained quickly by plant tissue culture. Breeding based on garden ornamental should focus on improving its branches, leaves and tree shape, and improving its anti-pollution ability and pruning and shaping ability.
Willow is one of the main tree species in North Temperate Park, with beautiful tree shape, early flowering and shady trees in early spring. Such as weeping willows and Korean weeping willows, with slender drooping branches, such as willow leaves of eyebrows. All kinds of shrubs and willows are resistant to pruning and can be cultivated into shrubs of various shapes or used as hedges. Willow is most suitable for waterside greening in garden landscape, such as "Willow Warming Warbler" in Hangzhou West Lake and "Taoxi Liuan" in Guiyang Huaxi. There are still many beautiful willows to be developed, such as those with big leaves, magnolia-like, purple branches, long spikes, red and yellow, red pistils and stigmas, which are also beautiful. In addition, there are more than 20 kinds of alpine willows, which are only 5 ~ 30cm in height, with creeping or upright branches, twisted and deformed, with different shapes, long life and easy survival, and are good materials for making garden bonsai. Commonly used in garden viewing, residential areas, gardens, schools, factories, hillsides, courtyards, roadsides and buildings. When in full bloom, the branches spread in all directions, making the courtyard full of green with high ornamental value; It is an ideal tree species to beautify the courtyard. It has strong resistance to air pollution and dust and is suitable for growing in urban gardens, especially by pools or streams.
2. Economic value
Bark contains tannin; The material is worse than willow, which can be used as utensils and paper raw materials; Catkin can fill chair cushions and pillows; Branches and fibrous roots can dispel wind and remove dampness. There is a cloud in the poem: the willow is dark and the flowers are bright. It shows that willow is extremely easy to survive. The fiber of willow bark can be used as raw material for textile and rope making; Branches can be woven into baskets, baskets, crates and helmets. Wood is white and tough. Can be used as small farm tools, small household appliances and charcoal burning.
Willow is light, easy to cut, does not deform after drying, and has no special smell. It can be used as building, potholes, box boards, match sticks and other materials. Wood fiber content is high, which is the raw material of papermaking and artificial cotton; Willow and willow branches are good firewood; Many kinds of wicker can be woven into baskets, boxes, hats and so on. Willow leaves can be used as feed for sheep and horses; Honey source plants; It is a beautiful ornamental tree species.
3. Environmental governance
Sweden obtains bioenergy by cultivating short-rotation willow dwarf forest (hereinafter referred to as willow dwarf forest). The afforestation of willow dwarf forest is mainly agricultural land, and the generated biomass is used for cogeneration of regional heating plants.
While producing bioenergy, willow dwarf forest can also play a role in removing pollutants and managing the environment. Sweden has successfully used willow dwarf forest to treat urban wastewater, landfill leachate, industrial wastewater (such as wastewater from wood storage plants sprayed with logs), sewage sludge and sawdust. , mainly through plant absorption to reduce pollutants and excessive nutrients in water and soil, and promote the degradation of organic pollutants by soil microorganisms. This process is called phytoremediation.
The poem "Qingmenliu" describing willow trees
Tang Bai Juyi
A green tree is sad, it has been separated from hatred by several people.
Send more farewells near the Doumen, and fold the strip in half to reduce the spring breeze.
Chang 'an Liu Xin
light
At the beginning of nine strange clouds, yellow willows are new.
Different scenery will bring better weather.
The color is light and slightly dew, and the silk is light but not dusty.
I want to break one and go back to this morning.
Look at the new willow in Linchuan
Tangcui road
I haven't seen Jiangtou for three or four days, and Liu Laojin is near the bridge.
The south bank of the bank crosses the north, and it is filled with rain and smoke.
The place where my hometown leads my dreams is twice as prosperous and declining as other countries.
The grass in Tingzhou is all the same color, and everyone knows how to kill it.
willow
Tangcui road
When the wind slows down, when the smoke blows water.
If you annoy the general, you will be tied to a short branch.
Zhang Lang's bones are soft and thin, and her waist is light and hungry.
My hometown has not returned, and my heart hurts.
Willow
Tang dihuan
The south is far from the north, and the shadow dances here.
Emerald color can't be folded, leave more feelings.
Caged on the shore after the rain, smoke on the Suihe River.
It has its own good name, followed by Qin Song.
Liu Xin
Don Dumu
The wind can't shake, the color is new, and the waist is envious.
The shade didn't cover the long dike water, and the golden spike greeted Yuan Chun first.
A few sad roads, a branch, the rain sees the dust.
More is the departure outside the east gate, fearing to kill the opposite person.
Liu jueju
Don Dumu
A group of trees are newly opened, and they are fascinated by the amorous feelings of spring.
Fan Chuan, the old country hates her, half built the village bridge and half blew the stream.
willow
Tangfanggan
The swaying posture makes the wind blow, and the embankment is softer than silk.
You'll know when you're strong, but it's hard to persist when you're weak.
Learn to dance branches and turn sleeves to make up Ye Mei.
How to climb, bosom friend and poetry.
willow
Tang hanhe
A cage of golden thread bends the bridge, and several children hurt their backs.
But the spirit and standard are there, and spring is still long.
willow
Don hancong
The green belt in willow songs moved away from the Golden Temple and planted in Lv Yun.
Shang Yang's maid-in-waiting made a noise and then came back to dance with her waist.
willow
Tang Han Gai
The snow is all green and hazy, the warm wind is late, and the early warbler returns.
If you leave spring with thin leaves, you must tie the long strips to shine.
Pengze is still depressed, and the Sui embankment is ownerless and reluctant.
In the world, people hate this, but pedestrians give it away.
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