一、繁种必须选择土质良好,肥力适中、均匀,地势平坦,光照充足,排灌方便,集中连片的田块种植,便于管理、收获,避免机械混杂和天然杂交,保证良种纯度。二、繁种所需原种一律由种子公司供给,坚决不准使用其它种子。三、秧田育秧管理。１、药物浸种。晴天晒种１～２天后用１０%的 First, the species must choose good soil quality, moderate fertility, uniform, flat topography, adequate lighting, irrigation and drainage convenience, concentrated contiguous plots planted, easy to manage and harvest, to avoid mechanical hybrids and natural hybrids to ensure the purity of varieties. Second, the species of seed required for breeding are all supplied by the seed company, and resolutely not allowed to use other seeds. Third, seedling nursery management. 1, drug soaking. Sunny days basking 1 to 2 days with 10% of the