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五、热带林的根系分类及根量测定热带林树木根系的形态分类也许是陆生植物群落中最多的,这都是不同植物适应生存的非正常形态根,对研究了解热带林植物的进化有十分重要意义。例如:热带林兰科植物的气生根就是适应其寄生性并利用空气中的湿度,而一种兰Taeniophyllum的气生根为绿色,可以代替绿色茎进行光台作用;藤本植物为了在被缠绕植物体上固着自身而形成抱茎根(Crasping root),许多攀援的乔灌木的不定根也很多;比较肥沃土壤上的热带草本根有时很发达,并暴露于地面,生物量也很可观;有些根不是向地性,而是负向地性(如Anselli a)。从解剖特征看,主要可分两类:一是骨骼根(Skeleton root),是指有次生加厚组织的根,二是远端根或尾根(distal end-root),是指没有次生加厚组织的初生根。
V. Root Classification and Root Quantitative Analysis of Tropical Forest The morphological classification of the root system of tropical tree may be the most terrestrial plant community, which is the abnormal morphology of different plants to adapt to the survival of the root of the study to understand the evolution of tropical plantain Very important. For example, the aerial roots of tropical orchidaceae are adapted to their parasitism and utilize the humidity in the air, while the aerial root of a blue Taeniophyllum is green, which can replace the green stems for light table function. Crasping root clinging itself to many adventitious adventitious roots and shrubs; the roots of tropical herbs on more fertile soils are sometimes well developed and exposed to the ground with considerable biomass; some are not directed toward Geotropism, but negatively (eg, Anselli a). From the anatomical characteristics of view, there are two main categories: one is the root of the skeleton (Skeleton root), refers to the secondary thickening of the root tissue, the second is the distal root or distal root (distal end-root), refers to no secondary Thickening of the primary root tissue.