Document


Title

Effects of fire, mowing and nitrogen addition on root characteristics in tall-grass prairie
Document Type: Journal
Author(s): T. L. Benning ; T. R. Seastedt
Publication Year: 1997

Cataloging Information

Keyword(s):
  • Andropogon gerardii
  • Andropogon scoparius
  • below-ground biomass
  • biomass
  • decay
  • fire management
  • foliage
  • forbs
  • Kansas
  • mowing
  • nitrogen
  • plant growth
  • range management
  • rhizome
  • root growth
  • root window
  • roots
  • Sorghastrum nutans
  • Sweden
  • tallgrass prairies
Region(s):
Record Maintained By:
Record Last Modified: June 1, 2018
FRAMES Record Number: 47373
Tall Timbers Record Number: 23301
TTRS Location Status: In-file
TTRS Call Number: Fire File
TTRS Abstract Status: Okay, Fair use, Reproduced by permission

This bibliographic record was either created or modified by the Tall Timbers Research Station and Land Conservancy and is provided without charge to promote research and education in Fire Ecology. The E.V. Komarek Fire Ecology Database is the intellectual property of the Tall Timbers Research Station and Land Conservancy.

Description

Root harvests and root windows were used to study the influence of fire, mowing and nitrogen additions on root lengths, biomass, and nitrogen content in tall-grass prairie. Four years of nitrogen additions (10 g m2 yr-1) increased below-ground mass by 15% and nitrogen concentration in that mass by 77%. In general, live roots and rhizomes exhibit greater increases in nitrogen concentrations than detrital roots and rhizomes. After four years of treatment, live roots and rhizomes immobilized an additional 1.5 to 5 g/m2 of nitrogen, depending upon specific treatment, while dead roots and rhizomes immobilized an additional 3 to 3.5 g/m2. Average root growth parameters, as measured with root windows, were positively correlated with above-ground peak foliage biomass; however, the only significant correlation was between average new root growth and above-ground peak foliage biomass (r = 0.73, p £ 0.04). Root growth and decay, as measured by annual mean values for eight root windows over a four year interval, were insensitive to climatic and treatment effects. © IAVS; Opulus Press Uppsala. Printed in Sweden.

Citation:
Benning, T. L., and T. R. Seastedt. 1997. Effects of fire, mowing and nitrogen addition on root characteristics in tall-grass prairie. Journal of Vegetation Science, v. 8, no. 4, p. 541-546. 10.2307/3237205.