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两种黄麻种子(C.capsularis和C.olitorius)经水预浸0、3、6、12小时后,在35℃温度下脱水24小时,然后研究在水压为-0.3和-0.4毫帕的聚乙二醇(分子量为6000)溶液中种子的萌发和幼苗生长情况。脱水处理(24小时)降低了种子含水量,但延长预浸时间可以使种子含水量提到对照水平。C.olitorius种子的含水量总是高于C.capsularis种子.一般来说,两种脱水过的黄麻种子比未脱水种子吸水多,但C.olitorius种子吸水率比C.capsularis的低。不管是哪种种子在无压情况下萌发,经吸胀4、8、12小时,其脱水种子与对照种子的发芽率都没有变化,水压则大大降低了C.olitorius种子的发芽率,脱水对C.olitorius种子萌发和幼苗生长的伤害要比C.capsularis大得多,这种伤害通过水压(-0.3和-0.4毫帕)得以加强。预浸3—6小时后再脱水对两种种子的萌发和幼苗生长的损害作用最小,在水压下亦如此。进一步延长预浸时间(12和24小时),有有害作用,这种作用因水压而加剧。C.olitorius种子对脱水处理比C.capsularis敏感得多,这就加大了总电解质、可溶性碳水化合物、自由氨基酸和无机磷酸盐的渗漏量。
Two kinds of jute seeds (C. capsularis and C. olitorius) were pre-soaked in water for 0, 3, 6, and 12 hours, dehydrated at 35 ° C for 24 hours, and then studied under water pressure of -0.3 and -0.4 mPa Seed germination and seedling growth in polyethylene glycol (molecular weight 6000) solution. Dehydration treatment (24 hours) reduces seed water content, but prolonging the pre-soaking time can raise the seed moisture level to the control level. The water content of C. olitorius seeds is always higher than that of C. capsularis seeds. In general, two dehydrated jute seeds absorb more water than the non-dehydrated seeds, but the water absorption of C. olitorius seeds is lower than that of C. capsularis. Regardless of which seed germinated under no pressure, the germination rate of dehydrated seed and control seed did not change after imbibition for 4, 8 and 12 hours, and the water pressure significantly reduced the germination rate and dehydration of C. olitorius seed The damage to C. olitorius seed germination and seedling growth was much greater than that of C. capsularis, which was enhanced by water pressure (-0.3 and -0.4 mPa). Pre-soaking for 3-6 hours followed by dehydration has minimal damage to germination and seedling growth of both seeds, also under water pressure. Further prolonging the prepreg time (12 and 24 hours) has a detrimental effect which is exacerbated by water pressure. C. olitorius seeds are much more sensitive to dehydration than C. capsularis, which increases the leakage of total electrolytes, soluble carbohydrates, free amino acids and inorganic phosphates.