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林业科学 ›› 2010, Vol. 46 ›› Issue (5): 133-140.doi: 10.11707/j.1001-7488.20100522

• 论文 • 上一篇    下一篇

欧美杨107杨苗人工倾斜树干应拉木形成特征及其解剖特性

刘亚梅,刘盛全   

  1. 安徽农业大学林学与园林学院 合肥230036
  • 收稿日期:2009-07-06 修回日期:1900-01-01 出版日期:2010-05-25 发布日期:2010-05-25
  • 通讯作者: 刘盛全

Formation and Anatomical Characteristics of Tension Wood in Stem of Poplar I-107 Seedlings(Populus × euramericana cv. “74/76”) Inducted by Artifical Inclination

Liu Yamei;Liu Shengquan   

  1. School of Forestry and Landscape Architecture,Anhui Agricultural University Hefei 230036
  • Received:2009-07-06 Revised:1900-01-01 Online:2010-05-25 Published:2010-05-25

摘要:

以60株1年生的欧美杨107杨幼苗为研究对象,在生长季节开展人工倾斜树干试验,将幼苗分成5组(每组12株)后倾斜成不同的角度(0°,15°,30°,45°和60°),苗木生长4个月后在次生木质部取样,观测横切面宏观和微观特征,分应拉区和对应区对其解剖特性进行测定分析。结果表明:1)随着倾斜角度的增加,横截面轮廓由圆形向椭圆形转变,年轮偏宽及起毛区域比例也随着角度增加而增大,方差分析表明不同倾斜角度对年轮偏宽及起毛区域比例影响显著;2)应拉木横切面双染色后随倾斜角度的增加导管数目减少,直径增加,胶质层厚度和区域增大,细胞腔表面由平整变为袖套状起伏,其形状由规则变为不规则;3)纤维长度、宽度和双壁厚随角度增加呈波动变化,应拉区比对应区纤维长度短,双壁厚厚,纤维宽度不同区域无明显变化模式,方差分析表明倾斜角度对纤维长度、宽度和双壁厚影响不显著,不同单株和区域对其影响显著;4)组织比量随倾斜角度的增加,应拉区胶质纤维比量增加明显,其他比量变化不明显,方差分析表明倾斜角度对应拉木组织比量影响不显著,不同单株和区域对其影响显著。

关键词: 欧美杨107杨, 苗木, 人工倾斜, 应拉木, 解剖特性

Abstract:

Sixty oneyearold saplings of poplar I107(Populus × euramericana cv. “74/76”) which were divided into five groups were planted in spring and artificially inclined at the angles of 0°,15°,30°,45°and 60° from the vertical. The samples were collected from secondary xylem three months later, and then anatomical characteristics of wood which separated as tension wood area(TW)and opposite wood area(OW)were analyzed, the following conclusions were drawn:1)Along with the increase of inclined angles, the eccentric and woolly area proportion became obvious, the shape of cross section changed from round to ellipsoidal, the eccentric growth and woolly area percent became bigger. The ANOVA results revealed that there were significant effects of inclined angle on eccentric and woolly proportion. 2)Characteristics of cross section view of tension wood were:the number of vessels decreased and the diameter of vessels increased along with the increase of inclined angle, the thickness and number of gelatinous increased;the surface of lumen became wavy and the shape of lumen became irregular. 3)Fiber length, width and double wall thickness fluctuated with the increase of inclined angle, the fiber length of TW were shorter than that of OW, the double wall thickness of TW were thicker than that of OW, The width didn’t present different between TW and OW. The ANOVA results revealed that there weren’t significant effects of inclined angle on fiber length;width and double wall thickness, but there were significant effects of tree and area on fiber length, width and double wall thickness. 4)Gfiber proportion of TW increased with inclined angle, other proportions didn't change obviously with inclined angle, The ANOVA results revealed that there weren't significant effects of inclined angle on tissue proportions;there were significant effects of tree and area on tissue proportions.

Key words: poplar clone I-107, seedling, artificial inclination, tension wood, anatomical characteristics