Based on the data from 2000 to 2014 and applying the comprehensive comparative advantage index and the resource endowment index, this paper investigated the comparative advantages of rice, citrus and rape seed in the central delta area, including Hunan, Jiangxi and Hubei Provinces. Main results show that: 1) the comprehensive comparative advantages of main crops in Hunan, Jiangxi and Hubei Provinces are different. Rice and citrus in Jiangxi have the strongest comprehensive comparative advantages while rape seed in Hubei has the strongest comprehensive comparative advantage; 2) the comparative advantages for three crops in city and state levels are different, with rice have higher comparative advantage in most cities. Citrus in Zhangjiajie, Xiangxi, Huaihua, Ganzhou and Yichang has stronger comparative advantage whereas rape seed in Zhangjiajie, Changde, Jiujiang, and Xiantao have stronger comparative advantage; and 3) the comparative advantage characteristics for three crops are different. The comparative advantage in the area with rice production expanded and the area with citrus production changed from "dispersed" to "concentrated", and the area with rape seed production presented a trend of relative concentration. On the basis of the above analysis results, this paper provides the following suggestions: fully utilizing the individual crops' comparative advantages to promote regional cooperation, breaking down the regional administrative barriers to establish cooperative development mechanism, creating and improving the relevant legal system, and perfecting the legal executing performance.%利用2000-2014年的相关数据,采用综合比较优势指数法和资源禀赋系数法,考察中三角地区主要农作物水稻、柑橘和油菜的比较优势格局.结果表明:1)湖南、江西和湖北三省的综合比较优势存在差异.江西省水稻和柑橘生产的综合比较优势明显,湖北省油菜生产的综合比较优势明显;2)三种农作物在市州层面的比较优势分布格局存在差异.大部分市州的水稻生产具有一定比较优势,张家界、湘西、怀化、赣州和宜昌的柑橘生产具有较强比较优势,张家界、常德、九江和仙桃的油菜生产具有较强比较优势;3)三种农作物比较优势格局的变迁特征存在差异.水稻生产具有比较优势的区域范围扩大,柑橘生产具有比较优势的区域由"零星分散"向"集中连片"演变,油菜生产具有比较优势的区域呈相对集中趋势.在此基础上,提出充分发挥各自的比较优势,实现优势互补;进一步打破行政区划的束缚,构建农业协同发展机制;建立健全相关的法律制度,完善法律保障体系等对策建议.
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