鹽城方言屬於江淮官話洪巢片，其音系的特殊現象在於陰聲韻攝存在鼻化韻：假、蟹、止攝的某些字為 ɪ̃ 韻，果、遇、流攝的某些字為 õ 韻，與鼻化的陽聲韻合流。學界早已注意到此特殊現象並有相關報導（參見蘇曉青 1992、蘇曉青 1993、顧黔 1993、馮法強 2017：191-192）。
　　本文在前人的研究基礎上，進一步探討何以鹽城方言陰聲韻攝高達六個韻攝涉及鼻化？其演變的條件為何？透過通盤檢視鹽城方言語料，觀察語音環境，並且與其他江淮官話洪巢片方言進行比較，本文發現其演變歷程必須剖析為兩階段。階段一，假、蟹、止攝的某些字先合流為 ɪ，果、遇、流攝的某些字先合流為 o。本文也找到這些字變為 ɪ 或 o 之語音條件；階段二，ɪ 與 o 由於語音相近再進一步分別與鼻化的陽聲韻 ɪ̃ 與 õ 合流。
　　在漢語方言陰聲韻鼻化的研究脈絡下，鹽城方言的研究成果揭示了一種「與鼻化的陽聲韻合流」的類型。此類型的方言，陰聲韻攝的鼻化韻，也可以在陽聲韻攝找到同樣的韻。本文也發現泰州方言陰聲韻鼻化亦屬於此類型。

　　Yancheng is a dialect of Lower Yangtze Mandarin. It is observed that vowelending rhymes are nasalized in Yancheng dialect: ɪ̃ in Jia, Xie, Zhi rhyme groups and õ in Guo, Yu, Liu rhyme groups (See Su 1993 and Gu 1993). The aim of this paper is to generalize the rules of these sound changes. To accommodate these changes, I postulate two stages: Stage I: some words in Jia, Xie, Zhi rhyme groups and Guo, Yu, Liu rhyme groups became ɪ and o respectively. Stage II: ɪ and o merged with ɪ̃ and õ respectively due to their similarities.
　　In studies of nasalization of vowel-ending rhymes, Yancheng dialect shows a new type, called “merged with nasalized vowel from nasal-coda rhyme”. I also found that Taizhou dialect belongs to this type.

鹽城方言; 陰聲韻攝鼻化韻; 與鼻化的陽聲韻合流; 泰州方言

Yancheng dialect; nasal vowels in vowel-ending rhymes; merge with nasalized vowel from nasal-coda rhyme; Taizhou dialect