种子寿命,是指种子的生命力在一定环境条件下,能够保持的最长限度,不同植物的种子,寿命长短差别很大,比如杨树种子,只能活30—40天,可莲子竞能活百年以上。原因是植物本身的遗传性不同,种类不同即决定了种子的寿命也不一样,象蚕豆、绿豆、小豆、甜莱、棉花、芝麻、白莱、萝卜等作物和蔬莱种子,寿命都比较长,因为这些种子有一层结实的种皮,能很好的保护种子胚部;特别是硬壳种子,种皮不透水,不透气,呼吸作用也 Seed life, refers to the vitality of seed under certain environmental conditions, to maintain the longest limit, the seeds of different plants, the length of life vary greatly, such as poplar seeds, can only live 30-40 days, lotus seeds can compete to survive A hundred years or more. The reason is that the heredity of plants is different. The types of seeds determine the longevity of seeds. The seeds and vegetables such as fava bean, mung bean, adzuki bean, sweet rice, cotton, sesame, white radish and radish have longer life span , Because these seeds have a layer of strong seed coat, can well protect the seed embryo; especially the hard shell seed, the seed coat impermeable, airtight, respiration also