种子的生活力:指种子有生命现象及其能力而言。也就是说,在满足种子萌发条件后,能萌发并长出健壮的幼苗的能力。种子生活力的大小,通常用发芽率来表示,但有休眠现象的种子,种子不能正常萌发,萌发率难以确切地表示种子生活能力的人小,故通常采用其他方法来测定,国际上最常用的方法为四氮(石坐)速测法。稀树干草原生态系统型:(萨玉纳生态系统型)是地球表 Seed vitality: refers to the seed has the phenomenon of life and ability. That is, the ability to germinate and grow robust seedlings after seed germination conditions are met. Seed size, usually with the germination rate to indicate, but there are dormant seeds, the seeds can not germinate, the germination rate is difficult to accurately represent the ability of people to live small, it is usually measured by other methods, the most commonly used internationally The method for the four nitrogen (stone sitting) rapid test. Savanna Steppe Ecosystem Type: (Sauna Ecosystem Type) is the Earth Table