Skip to Main Content
Soil CO2 evolution and root respiration in 11 year-old Loblolly Pine (Pinus taeda) Plantations as Affected by Moisture and Nutrient AvailabilityAuthor(s): Chris A. Maier; L.W. Kress
Source: Can. J. For. Res. 30: 347-359 (2000)
Publication Series: Miscellaneous Publication
PDF: View PDF (339 KB)
DescriptionWe measured soil CO2 evolution rates with (Sff) and without (Sms) the forest floor litter and root respiration monthly in 11-year-old loblolly pine (Pinus taeda L.) plantations during the fourth year of fertilization and irrigation treatments. Values of Sff ranged from less than 1 µmol·m-2·s-1 during the winter to greater than 5 µmol·m-2·s-1 in late spring. Average Sff was significantly greater in unfertilized relative to the fertilized stands; however, there was no difference in average Sms among treatments. Soil temperature and the mass of the forest floor (litter) explained most of the difference in Sms among treatments. Soil temperature and volumetric water content accounted for 70% of the seasonal variation in Sff. Annual carbon efflux from the soil averaged 14.1 Mg per year for all treatments. Most of the evolved carbon was derived from root respiration (50-73%). Net ecosystem productivity was -1.1 and 6.9 Mg C·ha-1 per year for the unfertilized and fertilized stands, respectively. At age 11, the unfertilized stands were functioning as a net carbon source, while fertilized stands were a strong carbon sink. It was concluded that fertilization could decrease the time for a young pine plantation to change from a carbon source to a carbon sink.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationMaier, Chris A.; Kress, L.W. 2000. Soil CO2 evolution and root respiration in 11 year-old Loblolly Pine (Pinus taeda) Plantations as Affected by Moisture and Nutrient Availability. Can. J. For. Res. 30: 347-359 (2000)
- Respiratory carbon use and carbon storage in mid-rotation loblolly pine (Pinus taeda L.) plantations: the effect of site resources on the stand carbon balance
- Intensive management modifies soil CO2 efflux in 6-year-old Pinus taeda L. stands
- Reduction of forest floor respiration by fertilization on both carbon dioxide-enriched and reference 17-year-old loblolly pine stands
XML: View XML