竺可桢论唐代气候较现代温暖 ,依据共有两点 ,一是长安宫廷苑宥内有梅花和柑桔 ,二是成都有荔枝。其前一依据之不能成立 ,已有研究 ,这里谈谈成都的荔枝问题。竺氏谓唐代成都有荔枝 ,所据为唐人张籍《成都曲》中“锦江近西烟水绿 ,新雨山头荔枝熟”的诗句 ,而宋人陆游在《老学? Zhu Kezhen on the climate of the Tang Dynasty than the modern warm, based on a total of two points, one court Yuyou Chang Court have plums and citrus, and second, there are lychees in Chengdu. The basis of the former can not be established, there have been studies, here to talk about the litchi in Chengdu. Zhu said that there are lychees in Chengdu in the Tang Dynasty. It is based on the verses of “Jinjiang near West, Sushui and Litchi Ripe” in Zhang’s “Chengdu Song” by the Tang Dynasty.