关键词: 燕麦, 等离子体活化水, 种子萌发, 幼苗生长, 主成分分析

Abstract: Using distilled water without plasma treatment as the control（CK），atmospheric pressure argon cold plasma at 2 and 3 kV was used to activate distilled water for 5，10，and 15 min，resulting in six types of plasma‑activated water（PAW）. These types of PAW were then used to irrigate oat seeds to investigate the effects of PAW on oat seed germination and seedling growth. A comprehensive evaluation of different PAW treatments was conducted using the membership function method and principal component analysis，so as to provide a theoretical basis for the application of PAW in enhancing the growth potential of oat seeds. The results showed that the NO₂⁻ content of F（PAW produced by 3 kV atmospheric pressure argon cold plasma treatment for 15 min） treatment was the highest. Compared with CK，all PAW treatments generally improved the germination vigor，germination rate，germination index，and vigor index of oat seeds，with E（PAW produced by 3 kV atmospheric pressure argon cold plasma treatment for 10 min）showing the greatest increase. E and F treatments also improved seedling plant height，root length，number of rootlets，fresh weight，dry weight，and contents of chlorophyll，carotenoid，and soluble protein，with E treatment being more effective. Comprehensive evaluation indicated that E treatment had the best promoting effect on oat seed germination and seedling growth，followed by F treatment.In conclusion，PAW produced by 3 kV atmospheric pressure argon cold plasma treatment for 10 min has the best promoting effect on oat seed germination and seedling growth.

Key words: Oat, Plasma activated water, Seed germination, Seedling growth, Principal component analysis