山东日照两城镇遗址出土的浮选植物标本和植桂体表明,稻米和粟是该遗址龙山先民重要的食物来源,但由于动物骨骼保存很差,我们对他们的肉食来源所知甚少。而采用碳氮稳定同位素法探讨古人的食性和食物结构,对各种同位素含量不同的食物在当时人们食谱中的相对重要性提供了补充定量的数据。 The samples of flotation plants and planted bodies unearthed from the sites of the two towns of Rizhao in Shandong Province show that rice and millet are important food sources for the ancestors of Longshan, but due to the poor preservation of animal bones, little is known about their source of meat. However, using carbon and nitrogen stable isotope method to explore the ancients’ food habit and food structure, this paper provided additional and quantitative data on the relative importance of different kinds of isotopes in people’s diet at that time.