原产地与引种地厚壁毛竹竹材成分质量分数比较

对原产地和引种地厚壁毛竹Phyllostachys edulis‘Pachyloen’竹材的9种化学成分和12种营养元素进行了测定与分析.结果表明:原产地竹材的冷水抽出物、热水抽出物、10.0 g·kg-1氢氧化钠抽出物、苯醇抽出物、木质素、纤维素、戊聚糖、灰分、二氧化硅质量分数分别为0.055 3,0.064 6,0.298 2,0.027 7,0.290 0,0.395 6,0.260 3,0.015 7,0.001 5 g·g-1.引种地竹材中热水抽出物、木质素、纤维素、戊聚糖、灰分、二氧化硅质量分数略高于原产地.原产地竹材营养元素按质量分数高低排列为钾(6.41 g·kg-1)＞氮(3.03 g·kg-1)＞磷(0.43 g·kg-1)＞锰、硫(0.39 g·kg-1)＞铁(161.52 mg·kg-1)＞钙(132.99 mg· kg--1)＞锰(82.43 mg· kg-1)＞铝(17.31 mg·kg 1)＞锌(10.47 mg· kg-1)＞铜(5.58 mg·kg-1)＞硼(0.52 mg· kg-1),但引种地竹材硫(0.34 g·kg-1)＞锰(0.25 g·kg-1)＞钙(186.23g·kg-1)＞铁(112.23 g·kg-1).引种地与原产地间的竹材营养元素存在显著性差异(P＜0.05),但化学成分差异未达到检验显著性水平.

Comparing composition of Phyllostachys edulis ＇ Pachyloen＇ in native and introduced habitats

Nine chemical components and twelve mineral elements in bamboo wood of Phyllostachys edulis ＇Pachyloen＇ from native and introduced habitats were studied. The diversity of bamboo wood among native and introduced habitats were revealed by two-tail variance analysis, meanwhile, bamboo age was referred to as an accessory factor in taking the significance test. Results from the native and introduced habitats showed signifi cant differences for mineral elements （P 〈 0.05） but not for the main chemical components. Content （in g·kg^-1） from,the native habitat was as follows： lignin （0.290 0）, cellulose （0.395 6）, pentosan （0.260 3）, cold wa- ter extract （0.055 3）, hot water extract （0.064 6）, benzene-ethanol extract （0.027 7）, ash （0.015 7）, and SiO2 （0.001 5） as well as 10.0 g·kg^-1 NaOH extract （0.298 2）. The sequence of mineral element content was K 〉 N 〉 P 〉 S=Mg 〉 Fe 〉 Ca 〉 Mn 〉 A1 〉 Zn 〉 Cu 〉 B in the native habitat, buts 〉 Mg 〉 Ca 〉 Fe in the native habitat. The main chemical components in bamboo wood from introduced habitat were consistent to native habitat values, which affirm that the genetic stability of Phyllostachys edulis ＇Pachyloen＇. Ch, 2 tab. 17 ref.]