Wood Structure and Environment (Springer Series in Wood by Fritz Hans Schweingruber

By Fritz Hans Schweingruber

The first goal of wooden constitution and setting is to bare the hidden ecological richness in stems and roots from timber, shrubs and herbs. The particular, lucid textual content will motivate researchers to think about the anatomic microcosm of wooden vegetation and use it as a retrospective resource of data, fixing difficulties on the topic of ecophysiology, festival, website stipulations, inhabitants biology, earth technology, wooden caliber or even human heritage.

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Wood Structure and Environment (Springer Series in Wood Science)

The first objective of wooden constitution and surroundings is to bare the hidden ecological richness in stems and roots from timber, shrubs and herbs. The designated, lucid textual content will motivate researchers to contemplate the anatomic microcosm of wooden crops and use it as a retrospective resource of knowledge, fixing difficulties on the topic of ecophysiology, pageant, website stipulations, inhabitants biology, earth technological know-how, wooden caliber or even human background.

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When the cambium dies locally, whole bunches of discontinuous rings evolve that form fluted stems (Fig. 28). Intra-annual growth inhibition gives rise to discontinuous latewood (Fig. 29), as well as discontinuous density variations or lignification zones (Fig. 30). Especially in stems of irregular growth, discontinuous marginal bands indicate variable growing conditions (Fig. 31) Discontinuous intra-annual bands with thickwalled ground tissue cells are shown in Figs. 11. In ring-porous species with minimal resources, especially under bad light conditions 24 Growth Zones and Stems in Relation to Genetic Ecological Factors Fig.

The Relationship Between Growth Rings ecological importance of narrow rays is not known. in Herbaceous Plants and Site Conditions Narrow ring widths are typical. 85 mm (Fig. 61). In temEven very small differences in the site condition perate and Mediterranean regions, they rarely go influence growth. Under limited growing condi- above 1 mm. tions, for example, on wind-exposed sites, in snow pockets, on permafrost or on underground stems in bogs, radial growth is very slow. 7 sites, the growth rings can hardly be distinguished Outlook from each other.

It is, therefore, not surprising that the structural differences within a tree are much greater than those between stems of different trees. Most of this book deals with the anatomy of adult stems, but this chapter will concentrate on juvenile structures and the anatomical conditions in root and crown. I am well aware that by doing so only certain aspect of the topic “tree architecture” will be covered (Gruber 1992). The structures at the initial point of the ramification of branches and roots have not been considered.

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