Efficient Cultivation and Management Techniques of Magnolia sieboldii in Shenyang

How do you grow magnolia? Magnolia is a small deciduous tree with a height of up to 10m. Flowers as white as jade, and embellished with purplish red stamens, beautiful and fragrant, pedicels slender, floating with the wind when in full bloom, just like Tiannu scattered flowers. Let's learn the planting techniques of Magnolia in Shenyang area.

1 Climatic survey of the planting site

1.1 Natural conditions in Shenyang area

Shenyang is located at 41 °11 °51 "~ 42 °17 °30" north latitude and 122 °25 °09 "~ 123 °48 °24" east longitude, with an average altitude of 50m. It belongs to the continental climate affected by monsoon in the north temperate zone, which is characterized by four distinct seasons, windy and dry spring, hot summer, rainy from July to August, cool autumn and long winter. The average temperature is 7.0℃ ~ 7.8℃, the average temperature in January is-12.5℃, the absolute minimum temperature is-32.2 ℃, the absolute maximum temperature is 39.3℃, the temperature difference between the north and south of the city is about 2 ℃, the average annual rainfall is 574.4~684.8mm, the annual evaporation is 1408~1765mm, the annual average relative humidity is 65%, the average annual sunshine is 2630.6h, and the frost-free period is 156d, which is suitable for the growth of plants in warm temperate zone.

1.2 Climate profile of Dandong

Dandong is located in the mid-latitude zone on the east coast of Eurasia, with longitude 123 °22: 30 "~ 125 °42: 00" east and latitude 39 °43: 31 "~ 41 °09: 21" north. It is located in the mid-latitude East Asian monsoon region and belongs to the continental monsoon climate in the warm temperate zone and humid zone. The climate is warm and cold, and the sun, rain and dew are harmonious. The monsoon is obvious, and it tends to be northerly in winter. Dandong region has more rainfall, which is the most rainfall area in Northeast China. The annual rainfall is 800~1100mm, and the annual average relative humidity is 69%-72%. The annual average temperature is 8.9 ℃, the winter is long, but the severe cold period is short, the average temperature of the coldest month in January is-7.4 ℃, and the extreme minimum temperature is-38.3 ℃. Although the summer is hot, the hot period is very short, the average temperature of July is 23 ℃, and the extreme maximum temperature is 37.3 ℃. The frost-free period in Dandong is 165.9 days in the whole year.

1.3 comparison of climate between the two places

Table 1 comparison of climatic conditions in different regions

In order to clearly compare the climatic conditions of the two places, the main climatic indexes are listed in Table 1. It can be seen from the table that Shenyang is closest to Dandong in terms of temperature, and the minimum temperature in January is about 5 ℃ lower than that in Dandong, so the trees with good local performance are successful in planting in Shenyang.

2 overwintering observation

Due to the cold climate, low absolute low temperature and long duration in Shenyang, many flowering trees often suffer from frost injury, resulting in great losses. In this experiment, the cold resistance of trees was determined according to the overwintering performance of trees in Shenyang area. In order to clearly understand the strength of cold resistance of these varieties, and in order to clearly distinguish the differences of cold resistance among varieties (Tian Wei et al., 2003; Zhou Mingong, 1997), the grade standard of cold resistance was formulated (Table 2).

Table 2 Cold resistance grade standard of tree species

According to the observation of Tiannu Magnolia in 2015 and 2016, it was found that some annual branches had slight frost injury, and the cold resistance was grade II, which could survive the winter in Shenyang area. Tiannu magnolia is used in the greening market in Shenyang, it is best to introduce big seedlings and plant them in the leeward and sunny part of the courtyard.

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The famous flower of Zushan-- Tiannu Mulan

Tiannu Magnolia, that is, mountain peony, belongs to Magnolia of Magnoliaceae. It is a second-class protected plant in the country. It is a rare flower that survived in the fourth season of Archaea, and is known as a living fossil of plants. 3 million years of ice, frost, rain and snow will not destroy the beauty of the country. In Dushan, the second main peak of Changbai Mountain and Yanshan Mountains in northern China, and Zushan in Qinhuangdao City, the shady slopes above 800 meters above sea level are scattered. In the Zushan tourist area (national AAAA level), in order to facilitate tourists to watch, set up Mulan Garden, which is dotted with 1500 plants of Magnolia. From mid-June to early July every year, Zushan secluded valley, green mountains and clear water, magnolia bloom, Yushu Qionghua, fragrant, fragrant, refreshing and lingering, at that time, Qinhuangdao City holds the Tiannu Magnolia Cultural Festival and carries out flower protector competitions. Magnolia fragrance, flowers as media friends and other rich and colorful cultural activities are even more beautiful and fascinating. In 2006, 17 professional exhibition gardens such as Shenyang International Horticultural Expo are Mulan Garden, and Mulan, the heavenly girl, becomes the protagonist in the garden, attracting tens of thousands of visitors.

Tiannu Magnolia is a special rare flower with beautiful leaves, flowers and fruits, excellent shape, color and fragrance, and has high ornamental value. Its bright leaves, crown development, full of vigor and vitality. Its flowers are pure and clean, otherworldly and otherworldly, and the white flowers and red stamens are better than magnolia. Into the autumn red fruit and green leaves, do not have a grace. Matching planting is like ancient interest Tiancheng, piece planting is like a sea of snow waves and clouds, and potted plants are tall and straight and magnificent. Flower buds are used as medicine to treat colds. The leaves contain aromatic oil and give off a delicate fragrance.

The simple and elegant beauty of magnolia, such as du Qingran, a talented woman of Azure Dragon, "A clump of flowers, Mulan," the words: "avoid the spring light to welcome summer, chic and unrestrained rely on the clouds." Clear sky wilderness fragrance Sheng, Mingbi grass, beautiful shadow Shushan. You Yan darling, delicate appearance quality, magnificent world. Two flowers incite butterflies, but the branches and cranes are leisurely. Wind pendulum plants floating interest, cool flying snow, reproduced Tian Lan. Visitors from all directions are obsessed with love, but their dreams are crippled from each other. " Magnolia is a small deciduous tree with strong adaptability, moist and shady environment, while adult trees like light and are suitable for growing in soils rich in humus and good drainage. Especially resistant to cold, dormant period can withstand minus 35 degrees Celsius. Magnolia mandshurica is cultivated with seeds, which is suitable for cultivation in northeast Sanshi province and northern Hebei. It can be planted on trial in other areas.

Du Liandi, manager of the first popular science demonstration base in Hebei Province (former deputy county magistrate and member of provincial forest seed and seedling association)

Base address: Xiangshuigou Village, Azure Dragon Manchu Autonomous County, Hebei Province

Mailing address: the guard room of Maternal and Child Health Hospital, Azure Dragon Manchu Autonomous County, Hebei Province.

Zip code: 066500 Tel: 0335

Cell phone: 139 / 103 Fax: 0335 / Fax / 971