摘要
利用光镜和扫描电镜对海垦1（HAI－KENG1）、PR107、GT1、RRIM600和PB865种不同抗风力的橡胶树品系的木材结构进行解剖学观察，描述木材结构的特征。以橡胶树木材的13个主要组成分子特征─—胶质纤维的分布及数量、导管长度、复孔率、导管弦径、导管密度、射线频率、单列射线高度、多列射线高度与宽度、纤维长度和宽度等因子，对不同抗风力的橡胶树进行比较，阐述了木材解剖特征与橡胶树抗风能力的关系。结果表明，5种不同橡胶品系之间木材部分组成分子存在明显差异；胶质纤维分布均匀和数量增加，有利于提高木材的韧性，增强抗风力；纤维长度与抗风力正相关；导管密度和抗风力负相关。
The wood structures of five wind - resistant clones,PR107,Haiken1,GT1,PB86and RRIM600 of Hevea brasiliensis Muell Arg. were studied by means of light microscopyand scanning electron microscopy. The wind -resistance was compared among the 5 clonesbased on 13 xy1em anatomical elements,e. g. amount and distribution of gelatinous fibres,vessel member length,percentage of multip1e pore -vesse1s,vessel density,ray frequency,height of uniseriate,height of multiseriate,width of multiseriate,percentage of mu1tiseriate,and length and width of fibres. The relationship between the wood anatomical characteristics and wind -resistance of the c1ones were observed. Resu1ts disc1osed distinct differencein some xylem compositions among the five clones. The even distribution and largerquantity of gelatinous fibre increased wood toughness and,as a resulte,improved wind resistance of the trees. The fibre length was found positively correlated with wind resistanceand the vessel density negatively with wind resistance.
出处
《热带作物学报》
CSCD
1998年第4期25-33,T001,3,共11页
Chinese Journal of Tropical Crops
关键词
橡胶树
抗风力
木材解剖
木材结构
Hevea brasiliensis
wind resistance
wood anatomy
gelatinous fibre of reaction wood
