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Drought Induced Fine Root Growth and Canopy Green-up of Tropical Dry Zone Vegetations in Sri Lanka

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dc.contributor.author Kuruppuarachchi, K. A. J. M.
dc.contributor.author Seneviratne, G.
dc.contributor.author Madurapperuma, B. D.
dc.date.accessioned 2022-03-24T04:46:10Z
dc.date.available 2022-03-24T04:46:10Z
dc.date.issued 2013
dc.identifier.citation Kuruppuarachchi, K. A. J. M., Seneviratne, G., Madurapperuma, B. D.(2013).Drought Induced Fine Root Growth and Canopy Green-up of Tropical Dry Zone Vegetations in Sri Lanka, Journal of Tropical Forestry and Environment Vol. 3, No. 01 (2013) 17-23 en_US
dc.identifier.uri http://dr.lib.sjp.ac.lk/handle/123456789/10817
dc.description.abstract Fine roots in forest soils have important implications for global carbon (C) balance, but processes underlying this C sink are not well understood. This study evaluates year round dynamics of fine roots in a tropical dry mixed evergreen forest and an arboretum in the dry zone of Sri Lanka. Monthly soil core samples (up to 25 cm depth) were collected randomly to cover a whole annual cycle of the two sites. The soils were air dried, sieved (< 2 mm), and fine roots (≤ 2 mm) were separated by handpicking coupled with a water floating technique. Then, fine root biomass and C density were calculated using oven dry weight. Annual mean fine root biomass of the dry zone forest and the arboretum were found to be 5.72 ± 0.57 t/ha and 7.88 ± 0.81 t/ha, respectively, with C densities of 2.69 ± 0.27 t/ha and 3.7 ± 0.38 t/ha, respectively. Thus, dry zone arboretum showed a higher growth and biomass, and hence a C pool of fine roots, than the dry zone forest, possibly due to a younger forest stand with fast fine root turnover rate. In both sites during the dry spell, there was an increased production of fine roots and a simultaneous leaf flush on the canopy with a green-up. The increased fine root growth during the dry season generally allows the trees to absorb more water under water-stressed situations. These events may be due to an undisclosed survival mechanism of such ecosystems under drought, which needs further studies. en_US
dc.language.iso en en_US
dc.publisher Department of Forestry and Environmental Science University of Sri Jayewardenepura en_US
dc.subject Drought, Fine root growth and canopy green-up, Tropical dry zone vegetation en_US
dc.title Drought Induced Fine Root Growth and Canopy Green-up of Tropical Dry Zone Vegetations in Sri Lanka en_US
dc.type Article en_US
dc.identifier.doi https://doi.org/10.31357/jtfe.v3i1.1119 en_US


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