我国农作物品种资源非常丰富,充分发掘,广泛收集作物品种,科学地加以贮藏,能为品种改良和培育提供丰富的原始材料。过去由于没有建设种子长期贮藏库,使一些珍贵的品种失去了发芽力,这种事例,在许多国家都发生过。例如:美国曾引进许多三叶草材料,由于保存不当,到五十年代初只剩下2%;同期,燕麦资源中还存活的只有20%;大豆资源中几乎95%失去发芽力,损失甚为惨重。这一问题已经引起世界许多国家的重视。自五十年代以来,美、日、苏等国相继建造了控制温度和湿度的品种资源库,到1977年为止世界 China’s crop varieties are very rich in resources, fully explored, extensive collection of crop varieties, scientific storage, can provide a variety of original materials for the improvement and cultivation of varieties. In the past, due to the lack of long-term storage of seed, some precious varieties lost their germination power. Such cases have occurred in many countries. For example, in the United States, many clover materials were introduced. Due to improper preservation, only 2% remained in the early fifties; over the same period, only 20% of oat resources still survived; almost 95% of soybean resources lost their germination power, causing heavy losses. . This issue has attracted the attention of many countries in the world. Since the 1950s, countries such as the United States, Japan, and the Soviet Union have successively built a library of species that controls temperature and humidity, until 1977.