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核桃和板栗这 两个树种,生物学 特性相近,对外界 环境条件的要求大 致相同,适合于山 区丘陵地带种植。 对温度的要 求:核桃和板栗都 是喜温树种,我国 重点产区的年平均气温8℃～15℃,生长季内(4至9月)≥10℃的积温3500℃左右,冬季最低气温不低于-25℃～-28℃,一般幼树在-20℃即受冻,大树在-26℃～-28℃时部
Walnut and chestnut these two species, biological characteristics are similar to the requirements of the external environmental conditions are roughly the same, suitable for planting in hilly areas. The temperature requirements: Walnut and chestnut are hi-temperature tree species, the key producing areas of China’s annual average temperature of 8 ℃ ~ 15 ℃, the growing season (April to September) ≥ 10 ℃ accumulated temperature of about 3500 ℃, the winter minimum temperature is not Below -25 ℃ ~ -28 ℃, the general saplings are frozen at -20 ℃, the tree at -26 ℃ ~ -28 ℃ Ministry of Ministry