What are the varieties of Chinese chestnut?

What are the varieties of Chinese chestnut? Please introduce that the traditional chestnut production is real breeding, and the so-called varieties are some primitive groups, such as Zhenan chestnut, Changan Mingdong chestnut, Hanzhong gray chestnut, Xunyang chestnut, Baoji chestnut, Weinan chestnut, Huanglong chestnut and so on. After the sixties of last century, we began to select superior trees and develop improved varieties of clones. For example, Zhushui County Chestnut Research Institute selected excellent varieties such as Zhaban 11 and Zhaban 14, and introduced some excellent varieties from other provinces at the same time. Such as: Jinfeng, Hongguang chestnut, Tancheng 207, Taian thin shell, Yanshan red chestnut, Yanlu chestnut and other excellent varieties have achieved initial results in various counties. The main variety groups and varieties in Shaanxi are introduced as follows: 1. Zhenan chestnut: originated in Zhenan County, the nut is brownish red, the average single fruit weight is 11g, the plant has strong stress resistance and wide adaptability. It blossoms in Zhenan in early May and matures in mid-September. Durable storage, the local mass storage in caves for 190 days, the rate of good fruit can also reach 90%. It contains 18.5% total sugar, 0.83% fat, 72.18% starch and 0.7% protein. two。 Changan bright chestnut: produced in the area of Changan Neiyuan duck pond mouth, the plant is tall, the crown is round head shape, fruiting branches, the yield per plant can reach 35,70kg, the average fruit weight is 10.5g. It blossoms from late April to early May, and the fruit ripens in the first and middle of September. This variety likes to be cool and moist. Young trees grow fast and bear fruit early. 3. Changan Grey Chestnut: distributed in the area of Changan Neiyuan and Yachikou. The crown is half-open, the branches are dense, the new is slightly stout, the leaf is long oval, the petiole is short, the involucral bract is long, the nut is oblate, the fruit weighs 9 grams, the nut is dark gray, dull, hairy and matured in early October. 4. Hanzhong gray chestnut: Fucheng, Xihe, Ma Yuan and other places in Hanzhong, Nanhai, Hongmiao and Yuan in Nanzheng. It is also cultivated in other places. The plant is tall, the dry indumentum is gray-brown, and the crack is deep and thick. The new gray hairs are rare, with small and protruding lenticels. The leaf blade is large oval, dark, very flat, serrated, needle pointed, petiole thick and short. The involucre is large, oblong, with long and dense needles and 2-3 nuts in the bract. Nuts are large, flat and round, with a single fruit weighing 7 to 8 grams and neat in size. The seed coat is thick and gray-black is difficult to peel off. The astringent skin is thick, the seed kernel is full, yellow, the texture is crisp and sweet, with the smell of oil. The tree is vigorous and has a long life. Enter the late result period. Strong adaptability, strong frost resistance at flowering stage. 5. Xunyang chestnut: mainly distributed in Xunyang, Ankang, Shiquan and other places. The tree is tall and naturally conical. The dry skin has deep grayish brown cracks. New slightly yellowish brown, densely fluffy, branches with large and dense white lenticels, leaves large, oblong, serrated shallow, needlelike short thorns. Involucre is large, oblong, acupuncture long, 4-6 per clump. The kernel is plump, yellowish and light in taste. The grafting bears late results. It blossoms in early May and the fruit ripens in the first and middle of September. 6. Baoji social chestnut: originated in Anpinggou, Pingtou Town, Chencang District, Donggou and other places. The plant of social chestnut is tall, the main stem is dark brown, and the bark is densely cracked and not easy to peel off. The involucral bract has long and many needles, and most of the nuts are 3, the nuts are flat and round, with an average weight of 8.2 grams, thin pericarp, light yellow kernel, good quality, fruit ripening in early September, plant cold resistance, drought resistance, like shade and dampness, and grow normally in alpine areas. 7. Tussah board 11: selected from the real tree by the Zhashui County Chestnut Research Institute, the nut is flat, brownish red, shiny, beautiful color, single fruit weight 10.9 grams, seed coat easy to peel, seed kernel contains 9.27% soluble sugar, good quality, strong disease resistance. 8. Tussah board 14: Zuoshui county chestnut research institute selected from the real tree, this variety of chestnut oval, reddish brown, single fruit weight 12.5 grams, kernel astringent skin easy to peel, containing soluble sugar? 10.04%, good quality, strong resistance to diseases and insect pests. 9. Jinfeng: selected from real trees in Xujia Village, Jishan Township, Zhaoyuan City, Shandong Province, this variety bears early fruit, small nuts, 8 grams of single fruit, reddish brown pericarp, delicate sweet waxy pulp, 16.8% total sugar and 9.8% protein. Mature in mid-late September and resistant to storage. Young trees grow vigorously, like fertilizer and water, are not resistant to barren, and are suitable for close planting. 10. Hongguang Chestnut: originated in Dongzhuangtou Village, Laixi County, Shandong Province, fruit growers are selected from real trees. The chestnut shed shines with 3 seeds per shed and 110 seeds per kilogram. Seed coat dark red glossy, beautiful appearance, medium-to-high quality. The seed yield is high and it is resistant to storage. The young trees grow strong and erect, and the branches are stout. The bud is full and the male and female flowers do not bloom at the same time, so it is necessary to configure pollination trees. The young trees bear fruit late and begin to bear fruit in 4 ~ 5 years, but they can produce high yield year after year after fruiting. 11. Tancheng 207: selected from Maozi Village, Tancheng County, Shandong Province in 1964. The chestnut is big and bright, 80 to 120 tablets per kilogram. Reddish brown, beautiful appearance and good quality. twelve。 Taian thin shell: Songjiazhuang Village, Mata Township, Qinan City, Shandong Province, is selected from real trees. The average weight of nuts is about 10 grams and the pericarp is jujube red. The luster is very bright, the flesh is delicate, sweet and waxy, and the quality is excellent. The moisture content of kernel is 44.5%, which contains 15.4% total sugar, 66.4% starch, 3.0% fat and 10.5% protein. The fruit ripens in late September. Click to get more chestnut planting techniques click to get more fruit planting techniques