为了更好地确定蓖麻秆人造板的制造工艺，研究了蓖麻秆及其不同部位的pH和酸碱缓冲容量。利用SAS软件分析了蓖麻秆的酸碱性与抽提物含量、灰分含量的相关关系。结果表明，蓖麻秆不同部位及整秆的pH、酸碱缓冲容量和缓冲容量都不相同，与蓖麻秆的抽提物和灰分含量具有一定的相关关系，随抽提物含量和灰分含量的变化而变化。蓖麻秆整秆的pH为(5.26±0.01)，呈酸性，酸缓冲容量为(19.5±1)，碱缓冲容量为(48.5±1)；蓖麻秆与木材的酸碱性较接近，适宜以脲醛树脂为胶黏剂生产人造板。

To establish a better manufacture craftwork for making castor stalks based board, the pH and acidalkali buffering capacity of the castor stalks and its different parts were examined. Besides, the relationship among pH, acid alkali buffering capacity and the extracts content, ash content was analyzed with SAS software. The results showed that the pH and the buffering capacity of the castor oil plant and its different parts were different. There was some relation between them and the extracts content and ash content. Furthermore the pH and the buffering capacity changed with the extracts and ash content changed. The pH of the castor oil plant was (5.26±0.01), acidity, the acid buffering capacity was (19.5±1) and the alkali buffering capacity was (48.5±1) of the stalks. So their acid alkali character was near to the character of the wood and it was feasible to make castor stalks based with ureaformaldehyde resin.