摘要
通过对春榆（Ｕｌｍｕｓｐｒｏｐｉｎｇｑｕａｋｏｉｄｚ，），裂叶榆（ＵｌｍｕｓｌａｃｉｎｉａｌａＭａｙｒ，），家榆（ＵｌｍｕｓｐｕｍｉｌａＬ．）和黄榆（Ｕｌ－ｍｕｓｍａｃｒｏｃａｒｐａＨａｎｃｅ）４种木材的解剖特征、物理性能、ｐＨ值、酸、碱缓冲容量以及脲醛树脂胶凝时间进行系统测试，结果表明，４种榆木均适合做胶合板用材，从而可以扩大胶合材用材树种，４种榆木的ｐＨ值、酸缓冲容量明显高于水曲柳（Ｆｒａｘ－ｉｎｕｓｍａｎｄｓｈｕｒｉｃａＲｕｐｒ．）、椴木（ＴｉｌａａｍｕｒｅｎｓｉｓＲｕｐｒ）寻常用胶合板材树种。建议生产榆木胶合板应该使用混合型固化剂．
By the system test of anotomy characters,physics properties,the pH value,buffering ca-pacity of acid and alkaline and gelation time of urea formaldehyde resin to four species such as Ulmuspropinqua,U.laciniata Mayr,U. pumila L.and U.macrocapa Hance,the results show that four specieselm are all suitable as the materials of plywood.Their pH value and acid buffering capacity are obvioustaller than the common tree species,such as Fraxinus mandshurica Rupr,and Tila amurenisis Rupr.So,the mixed nadening agent should be used in the production of elm plywood.
