1.良种包括两层含义:一是指农作物的优良品种,二是指农作物的优良种子。二者之间关系密切,脱离作物品种而孤立地谈种子,在农业生产上就失去实践意义;脱离种子而单纯谈品种子非常片面,因为作物品种特性与植株生长发育必须依靠种子而代代相传。所以,农业生产上的良种必须是优良品种的优良 1. Varieties include two meanings: one refers to the fine varieties of crops, the second refers to the fine seeds of crops. They are closely related to each other, and discussing seeds in isolation from crop varieties loses their practical significance in agricultural production. Simply talking about seed products without seeds is very one-sided because the characteristics of crop varieties and plant growth and development must rely on seeds and pass on from generation to generation . Therefore, the fine varieties of agricultural production must be excellent varieties of good