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Title: Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings (Pinus taeda L. )

Abstract

Nitrogen and phosphorus content and uptake rates were determined in loblolly pine grown at two CO[sub 2] levels (35 and 65 Pa) and three nutrient levels (7 mM NM[sub 4]NO[sub 3] + 1 mM PO[sub 4]; 7 mM NH[sub 4]NO[sub 3]+ 0.2 mM PO[sub 4]; 1 mM NH[sub 4]NO[sub 3] + 1 mM PO[sub 4]) over one growing season. Neither N uptake nor P uptake rates (on a root weight basis) were affected by CO[sub 2] enrichment in any of the nutrient treatments. Nutrient limitations by either N or P reduced the uptake rates of both N and P by seedlings. As the growing season progressed, leaf N and P concentrations decreased, and with nonlimiting soil N, leaf N was diluted by elevated CO[sub 2]. Leaf P was unaffected by CO[sub 2] enrichment as were concentrations of both N and P in stems and roots. Under nonlimiting N, almost 70% of total plant N was allocated to needles. Greater N was allocated to roots at the expense of leaf N under conditions of low soil N and this was enhanced by CO[sub 2] enrichment. With limiting P, there was almost no change in allocation of N or P, and onlymore » a marginal effect of CO[sub 2] enrichment on P allocation. Stimulation of biomass production by elevated CO[sub 2] with no increase in nutrient uptake rates indicates an increase in nutrient use efficiency by the seedlings.« less

Authors:
;  [1]
  1. Duke Univ., Durham, NC (United States)
Publication Date:
OSTI Identifier:
6396514
Report Number(s):
CONF-930798-
Journal ID: ISSN 0012-9623; CODEN: BECLAG
Resource Type:
Conference
Journal Name:
Bulletin of the Ecological Society of America; (United States)
Additional Journal Information:
Journal Volume: 74:2; Conference: 78. annual Ecological Society of America (ESA) meeting, Madison, WI (United States), 31 Jul - 4 Aug 1993; Journal ID: ISSN 0012-9623
Country of Publication:
United States
Language:
English
Subject:
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.; CARBON DIOXIDE; BIOLOGICAL EFFECTS; NUTRIENTS; AVAILABILITY; PINES; UPTAKE; NITROGEN; PHOSPHORUS; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CONIFERS; ELEMENTS; NONMETALS; OXIDES; OXYGEN COMPOUNDS; PINOPHYTA; PLANTS; TREES; 560300* - Chemicals Metabolism & Toxicology

Citation Formats

Thomas, R B, and Strain, B R. Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings (Pinus taeda L. ). United States: N. p., 1993. Web.
Thomas, R B, & Strain, B R. Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings (Pinus taeda L. ). United States.
Thomas, R B, and Strain, B R. 1993. "Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings (Pinus taeda L. )". United States.
@article{osti_6396514,
title = {Interactive effects of carbon dioxide and nutrient availability on nutrient uptake, allocation and accretion in loblolly pine seedlings (Pinus taeda L. )},
author = {Thomas, R B and Strain, B R},
abstractNote = {Nitrogen and phosphorus content and uptake rates were determined in loblolly pine grown at two CO[sub 2] levels (35 and 65 Pa) and three nutrient levels (7 mM NM[sub 4]NO[sub 3] + 1 mM PO[sub 4]; 7 mM NH[sub 4]NO[sub 3]+ 0.2 mM PO[sub 4]; 1 mM NH[sub 4]NO[sub 3] + 1 mM PO[sub 4]) over one growing season. Neither N uptake nor P uptake rates (on a root weight basis) were affected by CO[sub 2] enrichment in any of the nutrient treatments. Nutrient limitations by either N or P reduced the uptake rates of both N and P by seedlings. As the growing season progressed, leaf N and P concentrations decreased, and with nonlimiting soil N, leaf N was diluted by elevated CO[sub 2]. Leaf P was unaffected by CO[sub 2] enrichment as were concentrations of both N and P in stems and roots. Under nonlimiting N, almost 70% of total plant N was allocated to needles. Greater N was allocated to roots at the expense of leaf N under conditions of low soil N and this was enhanced by CO[sub 2] enrichment. With limiting P, there was almost no change in allocation of N or P, and only a marginal effect of CO[sub 2] enrichment on P allocation. Stimulation of biomass production by elevated CO[sub 2] with no increase in nutrient uptake rates indicates an increase in nutrient use efficiency by the seedlings.},
doi = {},
url = {https://www.osti.gov/biblio/6396514}, journal = {Bulletin of the Ecological Society of America; (United States)},
issn = {0012-9623},
number = ,
volume = 74:2,
place = {United States},
year = {Tue Jun 01 00:00:00 EDT 1993},
month = {Tue Jun 01 00:00:00 EDT 1993}
}

Conference:
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