<正>对10年生马占相思木材酸碱性质和抽提物含量进行了测定和相关分析,结果表明:马占相思木材平均pH为5.34,呈酸性,其酸缓冲容量和碱缓冲容量分别为0.142mmol和0.053mmol,两者的比值为2.68,其冷水、热水、1%NaOH和苯-醇的抽提物含量平均值分别为4.84%,5.75%,15.98%和6.09%;心材的酸缓冲容量和冷水、热水、1%NaOH及苯-醇的抽提物含量明显高于边材,并随着树干高度的增加而减小;而pH和碱缓冲容量则低于边材,并随着树干高度的增加而增大;pH与酸缓冲容量及热水、1%NaOH和苯-醇的抽提物含量呈负相关,而与碱缓冲容量和冷水抽提物含量呈正相关。

The content of extractive and acid-alkali property of Acacia mangium Willd woods were analyzed and their relationships were discussed.The result shows:(1)Acacia mangium Willd wood shows acidity and its pH is 5.34,the acid buffering capacity and alkali buffering capacity are 0.142 mmol and 0.053 mmol respectively,the extractive contents of cold-water,hot-water,1% NaOH and benzene-alcohol are 4.84%,5.75%,15.98% and 6.09% respectively.(2)the heartwood acid buffering capacities,the heartwood extractive contents of cold-water,hot-water,1% NaOH and benzene-alcohol are higher than sapwood,and decreased with the trunk height,the heartwood pH and alkali buffering capacity are lower than sapwood,and increased with the trunk height.(3)the pH shows negative correlation with the acid buffering capacity,the extractive contents of hot-water,1% NaOH and benzene-alcohol,and positive correlation with alkali buffering capacity and extractive content of cold-water.