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Title of Journal: Ann Bot

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Abbravation: Annals of Botany

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Narnia

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DOI

10.1002/aenm.201601578

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0305-7364

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Structure and Function of an Age Series of Poplar

Authors: Lodhiyal L S Singh R P Singh S P
Publish Date: 1995/08/01
Volume: 76, Issue: 2, Pages: 201-210
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Abstract

L S Lodhiyal R P Singh S P Singh Structure and Function of an Age Series of Poplar Plantations in Central Himalaya II Nutrient Dynamics Annals of Botany Volume 76 Issue 2 August 1995 Pages 201–210 https//doiorg/101006/anbo19951088This paper elucidates nutrient dynamics in 5 to 8yearold poplar Populus deltoides clone D121 plantations previously investigated for dry matter dynamics The nutrient concentration in different layers of the vegetation were in the order tree shrub herb whereas the standing state of nutrients were in the order tree herb shrub Soil litter and vegetation respectively accounted for 8089 23 and 916 of the total nutrients in the system Considerable reductions trees 4254 shrubs 3137 and herbs 1523 in concentration of nutrients in leaves occurred during senescence The uptake of nutrients by the vegetation and also by the different components with and without adjustment for internal recycling has been calculated separately Annual transfer of litter nutrient to the soil by vegetation was 113·7137·6 N 11·614·6 P and 80·183·2 K kg ha1 year1 Turnover rate and time for different nutrients ranged between 0·720·89 year1 and 1·121·39 years respectively The high turnover rate of litter on the forest floor indicates the greater productivity of the stands which was due to the higher dry matter dynamics and nutrient release for the growing vegetation The nutrient use efficiency in poplar plantations ranged from 159175 for N 14051569 for P and 295332 for K Compared with Eucalyptus there was a higher proportion of nutrient retranslocation in poplars largely because of higher tissue nutrient concentrations this indicates lower nutrient use efficiency as compared to the eucalypt plantation Compartment models for nutrient dynamics have been developed to represent the distribution of nutrient pools and net annual fluxes within the systemCopyright 1995 1999 Academic Press

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