在生产实践中,常常需要评定种子的质量,这就牵涉到种子的年产度和种子的活力问题。一般地,新收获的种子活力较高,而贮藏时间长的陈种子由于劣变程度大,活力较低。因此,鉴定种子的新老程度或年产度,实际上是测定种子的活力。种子在萌发早期放出挥发性醛的量与种子的活力有关,应用3—甲基—2—苯骈噻唑(3—Methy1-2-benzothiazolonehydrazone)试法测定种子的挥发性醛量,被认为是一种简易、快速、实用的测定种子活力的方法。我们应用此法研究了几种作物种子的 In production practice, it is often necessary to assess the quality of the seed, which involves the seed’s annual yield and vigor of the seed. In general, freshly harvested seeds are more viable, whereas older seeds that are stored for longer periods have lower vigor and lower vigor. Therefore, the identification of new and old seeds of the degree or annual output, in fact, the determination of seed vigor. The amount of volatile aldehydes emitted by seeds at early germination was related to the seed vigor. The determination of the amount of volatile aldehydes in seeds by 3-Methyl-2-benzothiazolonehydrazone test was considered as one A simple, fast and practical method of determining seed vigor. We apply this method to study several crop seeds