关键词: 柏木, 种子, 尿素, 调节剂, 渗透

Abstract: The study dealed with the effects of PEG, urea and NH₄CL on the vigor of Cypress seeds. The results showed that among the treatments of the combination of the molecular weight of PEG and the concentration of PEG solution and time, some enchanted the seed vigor, but the others not. The concentraion and time treatment had greater effects on the seed vigor than the molecular weigh. According to the direct targets of the vigor, the effect of the concentration was larger than that of time. However, there was a contrary result according to the indirect targets of the vigor. The combination of PEG and urea had better increase than only PEG or urea. It was the best treatment to soaking the seeds with PEG before with uiea. Good results were observed in soaking the seeds with NH₄CL. Among them, that of treating for two hours was the best Subject words: Mourning Gypress, Seed vigor Osmotic Adjustment: polyethylene glycol, Urea, NH₄CL.

Key words: CHINESE WEEPING CYPRESS, SEED, UREA, REGULATOR, OSMOSIS