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任何一种蔬菜种子，都有其安全有效使用期限，只有在安全有效使用期内使用，才能确保全苗壮苗，获得蔬菜优质丰产。现介绍几种蔬菜种子的安全有效使用期：白菜籽：安全有效使用期为２年。韭菜籽：必须是当年的新种子才能确保出苗，陈种子不易出苗，出苗也难成活。黄瓜籽：安全
Any kind of vegetable seeds, have their safe and effective use of the term, only in the safe and effective use of the period in order to ensure strong seedlings all seedlings, access to high-quality vegetables. Now introduce several kinds of vegetable seeds safe and effective use of: cabbage: safe and effective use of 2 years. Leek seed: must be the new seed of the year to ensure that the emergence of Chen seed is not easy to emergence, seedling is also difficult to survive. Cucumber seeds: safe