大贵寺国家森林公园野生青檀檀皮纤维成分分析

分析了湖北大贵寺国家森林公园野生青檀种群64份2～3年生青檀枝条檀皮的纤维成分.结果表明,该野生青檀枝条檀皮纤维的水分、灰分、冷水抽出物、热水抽出物等指标的平均值分别为8.267％、6.273％、24.025％、26.594％；1％NaOH抽出物、苯-醇抽出物、综纤维素、酸不溶木素等指标的平均值分别为60.904％、11.011％、56.759％、9.698％；纤维素吸光值为0.373.酸不溶木素、灰分、纤维素吸光值以及1％ NaOH抽出物4个指标呈现近正态分布,其它指标的分布偏斜度较大；水分与1％ NaOH抽出物、灰分与酸不溶木素、综纤维素与酸不溶木素之间具有显著的相关性(p＜0.05)；水分与灰分、水分与热水抽出物、水分与综纤维素、苯-醇抽出物与综纤维素、苯-醇抽出物与酸不溶木素之间具有极显著的相关性(p＜0.01).平均连锁值取5.627时,可以把64个样品分为23类,说明大贵寺国家森林公园野生青檀群体檀皮纤维成分存在着较高的表型多样性,具有广阔的遗传改良前景.

Composition of Bark Fiber of Wild Pteroceltis tatarinowii in Daguisi National Forest Park

The compositions of bark fiber in 64 samples （2-3 year old branches） of wild Pteroceltis tatarinowii population in Daguisi National Forest Park, Hubei province were ana- lyzed. Results showed that the average value of moisture, ash, cold water extraction, and hot water extraction was 8. 267% ,6. 273% ,24. 025% ,and 26. 594% ,respectively;of 1% NaOH ex- traction, benzene-alcohol extraction, holocellulose, and acid accumulator insoluble lignin was 60. 904%, 11. 011%, 56. 759% and 9. 698%, respectively; cellulose absorbance value was 0.373. The distribution of four indices, namely acid accumulator insoluble lignin, ash,cellulose absorbance, and 1% NaOH extraction,was near to normal distribution, but other variables had large skewness. The inter-correlations between moisture and 1% NaOH extraction,ash and acid accumulator insoluble lignin, holocellulose and acid accumulator insoluble lignin were signifi- cant （p 〈 0.05）. The inter-correlations between moisture and ash, moisture and hot water ex- traction,moisture and holocellulose, benzene-alcohol extraction and holocellulose,benzene-al- cohol extracts and acid accumulator insoluble lignin were highly significant （p 〈 0.01 ）. The 64 samples could be divided into 23 groups with average linkage of 5. 627, which showed high phenotypic diversity in the wild Pteroceltis tatarinowii population in Daguisi National Forest Park and its broad prospect of genetic improvement.