种子的使用价值在于它的生命力,而生命力又主要表现为遗传性和发芽力。为了在较长时期内保持种子的发芽力,对种子必须进行科学贮存。种子的贮藏蔬菜种子的贮藏期,应包括种子在植株上成熟直至播种这一完整过程,因此,要延长种子的贮藏寿命,就必须了解影响种子寿命的内外因素,以便采取相应的措施。影响种子寿命的主要因素有: 1、完熟前的障碍:受精后母株如果缺乏氮、磷、钾、钙等营养元素,以后种子的生活力减退就快;种子发育期间如遭遇高温多湿及病虫、霜冻等危害,也将导致发芽力减退。因此,为了提高种子的发芽力,对制种田和留种地应加强田间管理。 2、种子的活力和成熟度:适熟期收获的种子,其活力比未达熟期即收获的强,寿命也更长。 3、收获调制过程:收获、脱粒、干燥等过程中如果损伤了种子,会缩短种子寿命;种子进 The use value of seeds lies in its vitality, and vitality is mainly manifested as heredity and germination. In order to maintain seed germination for a longer period of time, the seeds must be scientifically stored. Seed storage Vegetable seeds should be stored for a period of time that includes the maturation of the seed until it is sown. Therefore, to extend the shelf life of the seed, it is necessary to understand the internal and external factors that affect seed life so that appropriate measures can be taken. The main factors affecting the seed life are: 1, before the completion of the obstacle: after fertilization mother plant if the lack of nitrogen, phosphorus, potassium, calcium and other nutrients, after the seed subsidence soon; seed development such as high temperature and humidity and pest , Frost and other hazards, will also lead to decreased germination. Therefore, in order to improve the germination of seeds, field management should be strengthened for farming and planting. 2, the vitality and maturity of seeds: Harvest maturity of seeds, the vitality than the less mature that is harvested, longer life expectancy. 3, the harvest modulation process: harvest, threshing, drying and other processes if the damage to the seeds, will shorten the seed life; seeds into