人工林泡桐木材不同生长部位材色的差异性

Color Differences of Paulownia Species in Different Growth Position

测定了甘肃兰考泡桐、湖北毛泡桐、湖南白花泡桐、河南兰考县的兰考泡桐、山东楸叶泡桐和山东豫林泡桐的不同干位、盘位的颜色指标,对其亮度、变红度、变黄度、总色差和白度进行分析。结果表明:6种泡桐的顶部材色质量最优,中部优于底部;顶部亮度的平均值为65.82,比中部高1%,比下部高3%;顶部的白度平均值为62.37,比中部高1%,比下部高3%;顶部的总色差最小,变红度最大,变黄度适中。湖南白花泡桐心材和中材材色相差不大,甘肃兰考泡桐心材较优,其它4种泡桐边材较优。干位、盘位的5种材色指标均达到极显著水平。

We measured five color parameters of brightness,red degree,yellow degree,general chromatism and whiteness in different growth position in six Paulownia species involving P. elongata from Gansu Province,P. tomentosa Steud from Hubei Province,P. fortunei from Hunan Province,P. elongata from Henan Province,P. catalpifolia and P. ‘Yulin＇from Shandong Province. These parameters of top stem were optimal,and middle stem were better than bottom stem among the six species. The average brightness of top stem was 65.82,which was 1% higher than that of middle stem,and 3% higher than that of bottom stem. The average whiteness of top stem was 62.37,which was 1% higher than that of middle stem,and3% higher than that of bottom stem. The general chromatism of top stem was minimum,and the red degree was the highest with moderate yellow degree. The difference between heart wood and sapwood was not significant in P. fortunei. The heart wood of P. elongata from Gansu Province was better than that of sapwood,while the sapwood of other four species were optimal. The difference of five color parameters in different growth position reached significant level.