Simulated biomass and soil carbon of loblolly pine and cottonwood plantations across a thermal gradient in southeastern United States
Journal Article
·
· Forest Ecology and Management
- ORNL
Changes in biomass and soil carbon with nitrogen fertilization were simulated for a 25-year loblolly pine (Pinus taeda) plantation and for three consecutive 7-year short-rotation cottonwood (Populus deltoides) stands. Simulations were conducted for 17 locations in the southeastern United States with mean annual temperatures ranging from 13.1 to 19.4 C. The LINKAGES stand growth model, modified to include the "RothC" soil C and soil N model, simulated tree growth and soil C status. Nitrogen fertilization significantly increased cumulative cottonwood aboveground biomass in the three rotations from a site average of 106 to 272 Mg/ha in 21 years, whereas the equivalent site averages for loblolly pine were unchanged at 176 and 184 Mg/ha in 25 years. Location results, compared on the annual sum of daily mean air temperatures above 5.5 C (growing-degree-days), showed contrasts. Loblolly pine biomass increased whereas cottonwood decreased with increasing growing-degree-days, particularly in cottonwood stands receiving N fertilization. The increment of biomass due to N addition per unit of control biomass (relative response) declined in both plantations with increase in growing-degree-days. Average soil C in loblolly pine stands increased from 24.3 to 40.4 Mg/ha in 25 years and in cottonwood soil C decreased from 14.7 to 13.7 Mg/ha after three 7-year rotations. Soil C did not decrease with increasing growing-degree-days in either plantation type suggesting that global warming may not initially affect soil C. Nitrogen fertilizer increased soil C slightly in cottonwood plantations and had no significant effect on the soil C of loblolly stands.
- Research Organization:
- Oak Ridge National Laboratory (ORNL)
- Sponsoring Organization:
- SC USDOE - Office of Science (SC)
- DOE Contract Number:
- AC05-00OR22725
- OSTI ID:
- 936277
- Journal Information:
- Forest Ecology and Management, Journal Name: Forest Ecology and Management Journal Issue: 3 Vol. 254; ISSN FECMDW; ISSN 0378-1127
- Country of Publication:
- United States
- Language:
- English
Similar Records
Changes in ecosystem carbon and nitrogen in a loblolly pine plantation over the first 18 years
Managing forests for biomass energy and nutrient-cycling concerns in the Atlantic coastal plain
Mulching improves the growth and internal moisture status of loblolly pine and yellow-poplar in an intensively managed biomass plantation
Journal Article
·
Mon Sep 01 00:00:00 EDT 2003
· Soil Science Society of America Journal
·
OSTI ID:978227
Managing forests for biomass energy and nutrient-cycling concerns in the Atlantic coastal plain
Conference
·
Thu Dec 31 23:00:00 EST 1981
·
OSTI ID:6875459
Mulching improves the growth and internal moisture status of loblolly pine and yellow-poplar in an intensively managed biomass plantation
Conference
·
Sat Dec 31 23:00:00 EST 1983
·
OSTI ID:6042709