郑玄“爻辰”易例与古代乐律论探析

Analysis of ZHENG Xuan's Yao-chen theory and Chinese ancient musicology

"爻辰",是东汉易学家郑玄所倡的重要易学条例。"爻辰"说承西汉京房《易》例而立,以乾、坤两卦的十二爻,与子、丑、寅、卯、辰、巳、午、未、申、酉、戌、亥十二辰相值配,并运用十二辰属相及其所值五行、方位、时令、二十八宿等各类物象解《易》,兼有诸多旁涉性的运用,其中,将"爻辰"与十二律吕相值配,乃接绪京房援《易》立律的思想,对后世的相关论说产生较大的影响,是两汉至魏晋隋唐时期音律理论发展、演变过程中重要的一环。本文对"爻辰"与十二律吕相值配的体系进行梳理、探析,探究其学说渊源,并揭示其思想文化的深沉意蕴。

Yao-chen is an important exegetical formula advocated by ZHENG Xuan, a famous Yi-ologist in the Eastern Han dynasty. ZHENG＇s Yao-chen theory was developed from the Western Han Yi-ologist JING Fang＇s hermeneutics, which correlates the twelve lines of the two hexagrams of Qian and Kun to the twelve earthly branches, and interprets the Zhouyi with the five elements, eight positions, four seasons and twentyeight constellations and so on, and so much so that many collateral agents were related, of which correlating the twelve earthly branches to the twelve pitch pipes succeeded JING Fang＇s thought of applying Yi to musicology. As an important link bridging the development of musicology of the Han dynasty and the Wei, Jin, Sui, as well as the Tang dynasties, ZHENG＇s Yao-chen theory exerted significant influence on later related theories. This paper tries to clarify the system correlating Yao-chen to the twelve pitch pipes, probe its theoretical origin, and reveal its profound cultural implications.