一、田间选种的方法1.穗选法。收获前在种子田中进行或在大田中严格进行选拔。要根据原品种的特征、特性,例如:成熟期、抗性、长势、分蘖力、株高等选拔单株。再根据需要的种子数量,来决定穗选的数量。在室内进行复选一次,淘汰不符合原品种标准的单穗。然后将穗混合脱粒,作为下一年种子田的用种。2.片选法。当稻穗刚抽出后,在品种纯度高的种子田,选择生长整齐,植株高矮一致,病虫害少 First, the method of field selection 1. Spike election method. Before the harvest in the field of seed or in the field strictly selected. According to the characteristics of the original varieties, characteristics, such as: maturity, resistance, growth, tillering ability, plant height selection of single plant. Then according to the number of seeds needed to determine the number of ears selected. Check in the room once, out of line with the standard does not meet the standard single spike. Then mix the ear threshed, as a seed for the next year seed. 2. Chip selection method. When the rice panicle just after the extraction, the variety of high purity seed field, choose to grow neatly, consistent plant height, pests and diseases less