Linyi chestnut seedlings Chestnut origin China, jujube peach apricot plum and ancient China are the world's five famous, is also the world famous fruit tree. Li Shi is rich in nutrition, with 7%6071% starch sugar, 23.71.755% 23% protein, and fat 2.07.4%. It also contains various vitamins and inorganic salts.
Chestnut is one of the earliest economic tree species in China. It has a long history of cultivation. As early as 6000 years ago, our ancestors began to use chestnuts as food, which has become an important economic tree species in the Han Dynasty.
First, biological characteristics
Chestnut Chestnut is a deciduous tree with a height of 20 meters and a long service life of more than one hundred years. Chestnut nursery seedlings 4 - 8 years, 15 years, 16 years for a fruit, grafting and breeding 23 years effect, 48 for the fruit, good Sheng fruit can be maintained for more than 50 years.
Chestnut is a deep-rooted plant with well-developed root systems. The horizontal distribution of the roots is usually 2.5 times higher than the crown. The root system of more than 85% is mainly concentrated in the trunk of 50250cm, generally 80cm deep, and the 20 soil profiles are the most young. The roots of chestnut seedlings are responsible for the growth of the chestnut. benefit.
Chestnut flower buds have a long period of disintegration. From the sixth to the seventh, the new shoots of the next year have been disintegrated. In the formation scale, Li Ya was called "shooting" during the period when the flower buds were disintegrated in a new shoot bud. When the blue buds disintegrated to 57 knots, the buds began to disintegrate physiologically, and the male buds disintegrated mainly after 68 months. Although the disintegration rate is slow, it is still possible that winter hibernation occurs. The female flower buds hibernate during the winter, appearing in the collapsed male inflorescence, hibernating from the beginning of March to the end of the bud, continue to develop, and continue to disintegrate, the new male inflorescence, if the conditions Suitably, the male inflorescence of the base disintegrates.
Chestnut unisexual, females can pollinate about 15 days. Chestnuts are self-fertile and cross-pollination can increase the seed setting rate. Linyi chestnut seedlings
Chestnut fruit growth and development can be divided into four stages: fertilization, embryogenesis period, endosperm, cotyledon absorption period, weight gain, from August to weight gain, about one month during which chestnut dry matter accumulation is mainly in this period, Especially in the first few days of maturity, the weight is fastest, so the chestnut harvest must be fully mature, the chestnut yield is high, and the quality is good.
2, ecological characteristics
Chestnut is widely distributed in China, from north of Liaoning Fengcheng in the north latitude 40 degrees 30, south to Hainan Island in about 1830 north latitude, the minimum altitude is less than 50 meters in the coastal plains of Shandong, such as Luancheng, Xinyi, Jiangsu and Elsewhere, this highest altitude of 2,800 meters is distributed, such as Yunnan, Yongren Weixi. Chestnut is a light tree species, especially in the flowering effect, can lead to physiological fruiting deficiencies, such as the annual shadow can make hole leaves yellow, or even dead branches.
The annual average temperature of 10.5 °C - 21.8 °C is appropriate, the absolute maximum temperature is less than 41.6 °C, the absolute minimum temperature of not less than 24.5 °C. Chestnut has a strong adaptability to humidity. Generally, the annual rainfall exceeds 1000 mm, and the average annual precipitation is 5002,000 mm that can be cultivated.
Chestnut does not require strict soil requirements. It is suitable for thick soil layer, good drainage, low groundwater level, sandy loam soil humus growth, and many beneficial mycorrhizae growth, which is most suitable at pH 5-6. Linyi chestnut seedlings
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