中文摘要：

汉代长安城是中国政治、经济、文化的中心，国都长安及其京畿地区也是农业生产最为发达的地区。为了供应京城内大量人口的日常消费和为全国的农业生产作出示范，西汉王朝尤为重视京畿地区的农业生产，着力兴修水利工程。赵过推广代田法首先在太常、三辅之地，又令全国郡守派员到长安学习先进的农业技术。农学家汜胜之也致力于三辅地区的农业推广，其编著的《汜胜之书》也主要是对三辅及关中地区农业生产技术的总结。汉都长安及其京畿地区先进的农业技术的创制和推广．从西域等地引进的农作物率先在此得到培育和传播．使这里成了全国最富庶和农耕技术最发达的地区。不但保证了京城的生活品供应，也为全国的农业生产提供了示范和经验。汉都长安对中国古代精耕细作传统农业体系的形成和发展发挥了重要作用。

英文摘要：

The Capital Chang＇an was the political and economic and cultural center of the whole country in the West Hart dynasty, and the capital city and its environs were the most developed regions in agricultural production. In order to supply the daily consumption and set an example to the whole country, the Western Han dynasty paid more attention to agricultural production and built irrigation works in the capital city and Its environs. Zhaoguo extended Daitianfa in Taichang and Sanfu areas first, and the government ordered the country to study the advanced agricultural technology. Fan Shngzhi devoted himself to agricuhural extension in Sanfu area, and his works Fanshengzhishu was the summary of agricultural production techniques in Sanfu and Guanzhong area. Innovation and extension of the advanced agricultural techniques made Chang＇an and its environs the most rich and populous region, which assured the supply of everyday articles and set an example to agricultural production of the whole country. The Capital Chang＇an played an important role in formation and development of intensive farming and it is worth deserving attention and studying.