针对当前农业上存在的主要农产品品质不高、粮食结构不优等问题，湖南省决定从今年起在全省实施十二大农业工程。这十二大农业工程的主要内容是：①以建设八大种苗龙头基地为主的种苗体系建设工程；②以推广两系杂交早稻为主的早籼稻品改工程；③开发６６７万ｈｍ２（１... In view of the current problems in agriculture, such as the low quality of major agricultural products and the poor grain structure, Hunan Province decided to implement 12 major agricultural projects in the province starting from this year. The main contents of these 12 major agricultural projects are: (1) the construction of a seedling system based on the construction of the eight seedling leading bases; (2) the project of early indica rice rebuilding based on the promotion of two-line hybrid early rice; (3) the development of 667,000 hm2 (1 ...