据《科学时报》 2 0 0 0年 7月 6日报道 ,法国发展研究所最近成功发明一种小果咖啡种子长期冷冻贮藏法 ,从而为建立小果咖啡种子库 ,保护生物多样性提供了可靠手段。法国发展研究所发明的方法主要分四个步骤 ,第一步是种子干燥脱水 ,第二步是将种子缓慢冷却并快速浸入液态氮中 According to “Science Times” reported on July 6, 2000, the French Institute for Development has recently succeeded in inventing a long-term frozen storage method for small-fruit coffee seeds, thereby providing a reliable basis for establishing a small-fruit coffee seed bank and for protecting biological diversity means. The method developed by the French Institute of Development is divided into four main steps. The first step is dehydration of seeds. The second step is to slowly cool the seeds and quickly immerse them in liquid nitrogen