一、引种的概念及作用引种是指从不同农业区域或从其他国家引入品种,经试种成功后直接用于生产。引种的作用主要在于:(1)引种能解决当地对品种的急需。(2)引种可以扩大种植区域。(3)引种可以提高产量,保证稳产。(4)引种可以改进品质。(5)引种有利于改进耕作制度,提高复种指数。(6)引种有利于充实育种资源。二、引种的一般规律 First, the introduction of the concept and role Introduction refers to the introduction of varieties from different agricultural regions or from other countries, the successful trial after the direct use for the production. The main role of introduction is: (1) Introduction can solve the local species urgently needed. (2) Introduction can expand the planting area. (3) Introduction can increase production and ensure stable production. (4) Introduction can improve quality. (5) The introduction is conducive to improving the farming system, improve the multiple cropping index. (6) Introduction is conducive to enrich breeding resources. Second, the introduction of the general law