Hans Persson

Factors affecting fine root dynamics of trees

Persson H. Factors affecting fine root dynamics of trees.

Tiivistelmä

Perhaps the most important function of the fine root system of forest trees is in the uptake of water and mineral nutrients. To perform this function adequately, the root system must be extensive and active enough to meet the needs of the canopy. Literature indicates that fine root production is substantial and that the seasonal pattern of fine root production is different from that of foliage production. Carbon incorporation into the soil in the form of dead roots is an important pathway in the total carbon flow through forest ecosystems. Root growth is sensitive to various climatic factors which are often imposed or strengthened by human activities. Factors that lead to growth suspension may or may not be the same as those that result in root shedding or senescence. The use of minirhizo-trons to study fine root dynamics means that ecologists are no longer justified in claiming that below-ground production is impossible to quantify in forest ecosystems. Keywords: Carbon budget, fine root production, liming, fertilization, minirhizotron, mycorrhiza, root tip, soil temperature, soil water

Avainsanat
fertilization; Carbon budget; fine root production; liming; minirhizotron; mycorrhiza; root tip; soil temperature; soil water

Vastaanotettu 31.10.2017 Julkaistu 1.1.1992

Katselukerrat 1123

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