Meteorological elements needed for jujube growth
Sprouting period: the daily average temperature begins to sprout when the daily average temperature reaches 14 degrees Celsius, and the leaves spread out at 17 degrees Celsius. Flowering period: the daily average temperature reaches 19mur20 degrees Celsius, and the flower begins to blossom from 20ml to 22:00. In full bloom, the temperature is 22 Mel 27 degrees Celsius, and the relative humidity is 60% MUR 70%. A large number of "scorched flowers" and young fruits will fall off when the relative temperature is less than 25%.
Fruit ripening period: the optimum temperature for fruit development is 25 Murray 27 degrees Celsius, and the relative humidity is about 75%. The suitable temperature of fruit ripening period is 18 ~ 22 degrees Celsius, and the sunshine hours are 410 hours.
The whole growth period: accumulated temperature more than 3000 degrees Celsius, frost-free period more than 130days, annual precipitation 400--~700mm.
Defoliation period: the temperature drops to 15 degrees Celsius and leaves begin to fall.
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Development and Utilization of Elaeagnus angustifolia Food
Elaeagnus angustifolia (ElaeagnusangustifoliaL.), also known as Fraxinus mandshurica, Elaeagnus angustifolia, Elaeagnus angus Elaeagnus angustifolia is distributed in Shaanxi, Gansu, Inner Mongolia, Ningxia, * *, Qinghai and other places. It is also distributed in the Taklimakan Desert and along the banks of various rivers, as well as in Yili and Toksun in northern Xinjiang. Elaeagnus angustifolia is a saline-alkali land in desert.
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Cultivation techniques of Southern Pear
With the development of pear production, the original pear varieties in Tongxiang gradually exposed its defects. Huanghua pear fruit can be unstable, the mature period is easy to be affected by typhoon, the mature period is easy to crack fruit in the new century, and some years suffer heavy losses. In order to meet the market demand, Cuiguan and crisp green pear varieties have been promoted in recent years, and good benefits have been achieved. I.
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