Effects of CO{sub 2} and nitrogen fertilization on soils planted with ponderosa pine

PDF Version Also Available for Download.

Description

The effects of elevated CO{sub 2} (ambient, 525, and 700 {micro}l l{sup -1})and N fertilization (0, 10, and 20 g N m{sup 2} yr{sup -1}) on soil pCO{sub 2}, CO{sub 2} efflux, soil solution chemistry, and soil C and nutrients in an open-top chamber study with Pinus ponderosa are described. Soil pCO{sub 2} and CO{sub 2} efflux were significantly greater with elevated CO{sub 2}, at first (second growing season) in the 525 {micro}l l{sup -1} and later (fourth and fifth growing seasons) in the 700 {micro}l l{sup -1} CO{sub 2} treatments. Soil solution HCO{sub 3}{sup -} concentrations were temporarily elevated ... continued below

Physical Description

37 p.

Creation Information

Johnson, D.W. December 1, 1996.

Context

This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. More information about this report can be viewed below.

Who

People and organizations associated with either the creation of this report or its content.

Provided By

UNT Libraries Government Documents Department

Serving as both a federal and a state depository library, the UNT Libraries Government Documents Department maintains millions of items in a variety of formats. The department is a member of the FDLP Content Partnerships Program and an Affiliated Archive of the National Archives.

Contact Us

What

Descriptive information to help identify this report. Follow the links below to find similar items on the Digital Library.

Description

The effects of elevated CO{sub 2} (ambient, 525, and 700 {micro}l l{sup -1})and N fertilization (0, 10, and 20 g N m{sup 2} yr{sup -1}) on soil pCO{sub 2}, CO{sub 2} efflux, soil solution chemistry, and soil C and nutrients in an open-top chamber study with Pinus ponderosa are described. Soil pCO{sub 2} and CO{sub 2} efflux were significantly greater with elevated CO{sub 2}, at first (second growing season) in the 525 {micro}l l{sup -1} and later (fourth and fifth growing seasons) in the 700 {micro}l l{sup -1} CO{sub 2} treatments. Soil solution HCO{sub 3}{sup -} concentrations were temporarily elevated in the 525 {micro}l l{sup -1} CO{sub 2} treatment during the second growing season, consistent with the elevated pCO{sub 2}. Nitrogen fertilization had no consistent effect on soil pCO{sub 2} or CO{sub 2} efflux, but did have the expected negative effect on exchangeable Ca{sup 2+}, K{sup +}, and Mg{sup 2+}, presumed to be caused by increased nitrate leaching. Elevated CO{sub 2} had no consistent effects on exchangeable Ca{sup 2+}, K{sup +}, and Mg{sup 2+}, but did cause temporary reductions in soil NO{sup 3{sup -}} (second growing season). Statistically significant negative effects of elevated CO{sub 2} on soil extractable P were noted in the third and sixth growing seasons. However, these patterns in extractable P reflected pre-treatment differences, which, while not statistically significant, followed the same pattern. Statistically significant effects of elevated CO{sub 2} on total C and N in soils were noted in the third and sixth growing seasons, but these effects were inconsistent among N treatments and years. The clearest effect of elevated CO{sub 2} was in the case of C/N ratio in year 6, where there was a consistent, positive effect. The increases in C/N ratio with elevated CO{sub 2} in year six were largely a result of reductions in soil N rather than increases in soil C. Future papers will assess whether this apparent reduction in soil N could have been accounted for by plant uptake.

Physical Description

37 p.

Notes

OSTI as DE00762781

Medium: P; Size: 37 pages

Source

  • Other Information: PBD: 1 Dec 1996

Language

Item Type

Identifier

Unique identifying numbers for this report in the Digital Library or other systems.

  • Report No.: N/A
  • Grant Number: FG03-95ER62026
  • DOI: 10.2172/762781 | External Link
  • Office of Scientific & Technical Information Report Number: 762781
  • Archival Resource Key: ark:/67531/metadc723107

Collections

This report is part of the following collection of related materials.

Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

What responsibilities do I have when using this report?

When

Dates and time periods associated with this report.

Creation Date

  • December 1, 1996

Added to The UNT Digital Library

  • Sept. 29, 2015, 5:31 a.m.

Description Last Updated

  • April 12, 2017, 2:22 p.m.

Usage Statistics

When was this report last used?

Yesterday: 0
Past 30 days: 0
Total Uses: 7

Interact With This Report

Here are some suggestions for what to do next.

Start Reading

PDF Version Also Available for Download.

International Image Interoperability Framework

IIF Logo

We support the IIIF Presentation API

Johnson, D.W. Effects of CO{sub 2} and nitrogen fertilization on soils planted with ponderosa pine, report, December 1, 1996; United States. (digital.library.unt.edu/ark:/67531/metadc723107/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.