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对长江三峡库区中坝遗址人和动物牙釉质C和O同位素进行分析,重建该地区在距今约2.4～4.2ka期间人和动物的食性特征.结果表明人类主要以C4作物如粟等为主要食物,而水稻和小麦等C3作物含量较少,一般少于15%.猪的食物与人类牙釉质的食物存在显著的差别,其C3植物含量总体上大于人类食物的C3作物含量,但猪和人类的δ13C值存在重叠,表明人和猪的食物具有相似性;同时牙釉质δ13C揭示人和猪的体内水分来源也明显不同.鹿和牛的食物也存在明显差别,这是由于它们处于不同的生态位,但它们的δ13C值也部分重叠,也有相似的食物成分;在体内水分来源上它们之间也存在差别.杂食的人和猪与草食动物的鹿和牛不仅食物差别显著,不具有相似性,而且体内水分来源上也存在差别.4.2～2.4kaBP期间该地区人类农作物的生产方式和饮食习惯没有明显改变,但猪的养殖方式发生了变化,从放养到圈养,猪的食物中C3作物含量不断增加.随生产力的发展,到战国时期,中坝地区出现了较大范围的人类迁徙活动.
The C and O isotopes of human and animal enamel in the dam site of the dam in the Three Gorges reservoir area were analyzed to reconstruct the feeding characteristics of humans and animals in the area from about 2.4 to 4.2 ka from now on.The results show that humans mainly use C4 crops such as millet Major foodstuffs, whereas C3 crops, such as rice and wheat, contain less, typically less than 15%. There is a significant difference between porcine foodstuffs and human enamel foodstuffs, whose C3 plant content is generally greater than the C3 crop content of human food, And human δ13C values overlap, indicating that human and swine food have similarities; while enamel δ13C revealed a significant difference in body water sources between humans and pigs. There is also a significant difference between deer and cattle food due to their differing Niche, but their δ13C values also partially overlap with similar food compositions, and there are also differences in their sources of water in the body. Not only are the omnivores and pigs and herbivores deer and cattle notablely different in food and have no similarities , But there is also a difference in the source of water in the body.4.2 ~ 2.4kaBP during the production of human crops and eating habits in the region did not change significantly, but pig breeding occurred Of, from stocking to captivity, pig food crops in C3 content increases. With the development of the productive forces, to the Warring States period, the dam areas have a wide range of human migration activities.