西藏是核桃原产地之一

Tibet is One of the Original Production Area of Juglanns L.

西藏历史文献中有关于核桃的记述,西藏有树龄2 200年的古核桃树,有1.2×10~5株核桃古树,有面积1.0×104hm^2的核桃林。古生物考古发现,从白垩纪(距今1.37×10~8-6.5×10~7年)到第四纪更新世(距今1×10~4-1.80×10~4年)西藏地质剖面中一直有核桃孢粉存在。相关研究表明,西藏是核桃的原产地之一。

Judglans L. has been recorded in Tibetan historical literature, and there is a Judglans tree with 2 200years old Tibetan Autonomous Region. Around 1.2x10^5 ancient Judglans trees with an area of 1.0x10^4 hm2 are dis-tributed in this region. The study from paleontological archaeology shows that pollen of Judglans has been existedfrom the Cretaceous period （1.37x10^8-6.5 x 10^7 years ago） to the Quaternary Pleistocene period （lx104-1.8x10^4 years ago） . All relevant study shows that Tibetan Autonomous Region is one of Judglans L. origin.