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Title: Loblolly pine productivity and water relations in response to throughfall reduction and fertilizer application on a poorly drained site in northern Florida

Abstract

Loblolly pine ( Pinus taeda L.) forests are of great ecological and economic value in the southeastern United States, where nutrient availability frequently limits productivity. The impact of fertilizer application on the growth and water relations of loblolly pine has been investigated by numerous studies; however, few field experiments have examined the effects of drought. Drought is of particular interest due to the potential for climate change to alter soil water availability. In this study, we investigated the impact of fertilizer application and a 30% reduction in throughfall on loblolly pine productivity, transpiration, hydraulic conductance, and stomatal conductance. The study was installed in a ten-year-old loblolly pine plantation on a somewhat poorly drained site in northern Florida. Throughfall reduction did not impact tree productivity or water relations of the trees. This lack of response was attributed to abundant rainfall and the ability of trees to access the shallow water table at this site. Fertilizer application increased basal area production by 20% and maximum leaf area index by 0.5 m2 m 2, but it did not affect whole-tree hydraulic conductance or the sensitivity of stomatal conductance to vapor pressure deficit. During the spring, when leaf area and vapor pressure deficit weremore » high, the fertilizer-only treatment increased monthly transpiration by 17% when compared to the control. This relationship, furthermore, was not significant during the rest of the year.« less

Authors:
 [1];  [2];  [3];  [2];  [2]; ORCiD logo [4]
  1. Univ. of Florida, Gainesville, FL (United States); Oregon State Univ., Corvallis, OR (United States)
  2. Univ. of Florida, Gainesville, FL (United States)
  3. Oregon State Univ., Corvallis, OR (United States)
  4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); North Carolina State Univ., Raleigh, NC (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1326552
Grant/Contract Number:
AC05-00OR22725
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Forests
Additional Journal Information:
Journal Volume: 7; Journal Issue: 10; Journal ID: ISSN 1999-4907
Publisher:
MDPI
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Pinus taeda; throughfall exclusion; nutrient amelioration; transpiration; stomatal conductance; sap flow

Citation Formats

Wightman, Maxwell G., Martin, Timothy A., Gonzalez-Benecke, Carlos A., Jokela, Eric J., Cropper, Jr., Wendell P., and Ward, Eric J.. Loblolly pine productivity and water relations in response to throughfall reduction and fertilizer application on a poorly drained site in northern Florida. United States: N. p., 2016. Web. doi:10.3390/f7100214.
Wightman, Maxwell G., Martin, Timothy A., Gonzalez-Benecke, Carlos A., Jokela, Eric J., Cropper, Jr., Wendell P., & Ward, Eric J.. Loblolly pine productivity and water relations in response to throughfall reduction and fertilizer application on a poorly drained site in northern Florida. United States. doi:10.3390/f7100214.
Wightman, Maxwell G., Martin, Timothy A., Gonzalez-Benecke, Carlos A., Jokela, Eric J., Cropper, Jr., Wendell P., and Ward, Eric J.. Mon . "Loblolly pine productivity and water relations in response to throughfall reduction and fertilizer application on a poorly drained site in northern Florida". United States. doi:10.3390/f7100214. https://www.osti.gov/servlets/purl/1326552.
@article{osti_1326552,
title = {Loblolly pine productivity and water relations in response to throughfall reduction and fertilizer application on a poorly drained site in northern Florida},
author = {Wightman, Maxwell G. and Martin, Timothy A. and Gonzalez-Benecke, Carlos A. and Jokela, Eric J. and Cropper, Jr., Wendell P. and Ward, Eric J.},
abstractNote = {Loblolly pine (Pinus taeda L.) forests are of great ecological and economic value in the southeastern United States, where nutrient availability frequently limits productivity. The impact of fertilizer application on the growth and water relations of loblolly pine has been investigated by numerous studies; however, few field experiments have examined the effects of drought. Drought is of particular interest due to the potential for climate change to alter soil water availability. In this study, we investigated the impact of fertilizer application and a 30% reduction in throughfall on loblolly pine productivity, transpiration, hydraulic conductance, and stomatal conductance. The study was installed in a ten-year-old loblolly pine plantation on a somewhat poorly drained site in northern Florida. Throughfall reduction did not impact tree productivity or water relations of the trees. This lack of response was attributed to abundant rainfall and the ability of trees to access the shallow water table at this site. Fertilizer application increased basal area production by 20% and maximum leaf area index by 0.5 m2 m 2, but it did not affect whole-tree hydraulic conductance or the sensitivity of stomatal conductance to vapor pressure deficit. During the spring, when leaf area and vapor pressure deficit were high, the fertilizer-only treatment increased monthly transpiration by 17% when compared to the control. This relationship, furthermore, was not significant during the rest of the year.},
doi = {10.3390/f7100214},
journal = {Forests},
number = 10,
volume = 7,
place = {United States},
year = {Mon Sep 26 00:00:00 EDT 2016},
month = {Mon Sep 26 00:00:00 EDT 2016}
}

Journal Article:
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