论文部分内容阅读
本试验所用的美国海岸松(pinus contorta)种子样品,发芽率低(67%),发芽势也低(21%)。经查定,未能发芽的33%的种粒,几乎全为死亡种粒。用本文所述的IDS法。从样品中清除28%的种粒(主要是死亡种粒)后,经发芽测定,所余种子的发芽率提高到了96%。IDS法的基本原理是,培养几天(本文为15℃,3天),再行干燥,种子所吸水分的遗失速率随种子的生活力而不同。本试验中,死亡的松树种子干燥12小时,便失去了在培养过程中所吸收的全部水分;而有生活力的种子,在相同的条件下持有大量被吸收的水分。因此,干燥处理后便可用水浮选或用其它方法,将有生活力的种子同死亡种子分离开来。IDS法(I:培养,D.干燥,S:分离)不仅提高了这份美国海岸松种子的发芽率,还把发芽势从21%提高到了61%。IDS法的三个步骤,都能用x射线摄影法、切开法,以及所谓的沉降法迅速核查.
The pinus contorta seed samples used in this experiment showed low germination rate (67%) and low germinability (21%). It has been determined that 33% of the seeds that failed to germinate are almost all dead seeds. Use the IDS method described in this article. After removing 28% of the seeds (mainly dead seeds) from the sample, the germination rate of the remaining seeds was increased to 96% as determined by germination. The basic principle of IDS method is to cultivate a few days (15 ° C, 3 days), and then dry, the rate of loss of moisture absorbed by the seed varies with the viability of the seed. In this experiment, the dead pine seeds dried for 12 hours, losing all of the moisture they had absorbed during the cultivation process; whereas viable seeds held large amounts of absorbed water under the same conditions. Therefore, after the drying process, water flotation or other methods can be used to separate the viable seeds from the dead seeds. The IDS method (I: Cultivation, D. Drying, S: Separation) not only increased the germination rate of this American pine seed, but also increased the germination potential from 21% to 61%. The three steps of the IDS method can be quickly verified by x-ray photography, incision, and the so-called settlement method.