Skip to page content
USDA Forest Service
  
Treesearch

Research & Development Treesearch

 
Treesearch Home
About Treesearch
Contact Us
Research & Development
Forest Products Lab
International Institute of Tropical Forestry
Northern
Pacific Northwest
Pacific Southwest
Rocky Mountain
Southern Research Station
Help
 

Science.gov - We Participate


USA.gov  Government Made Easy


Global Forest Information Service

US Forest Service
P.O. Box 96090
Washington, D.C.
20090-6090

(202) 205-8333

You are here: Home / Search / Publication Information
Bookmark and Share

Publication Information

View PDF (1.2 MB)

Title: Analyzing the uncertainties in use of forest-derived biomass equations for open-grown trees in agricultural land

Author: Zhou, Xinhua; Schoeneberger, Michele M.; Brandle, James R.; Awada, Tala N.; Chu, Jianmin; Martin, Derrel L.; Li, Jihong; Li, Yuqiang; Mize, Carl W.;

Date: 2014

Source: Forest Science 60(2015)

Publication Series: Scientific Journal (JRNL)

Description: Quantifying carbon in agroforestry trees requires biomass equations that capture the growth differences (e.g., tree specific gravity and architecture) created in the more open canopies of agroforestry plantings compared with those generally encountered in forests. Whereas forest-derived equations are available, equations for open-grown trees are not. Data from destructively sampled open-grown trees in the Northern Great Plains were used to examine the uncertainties in the use of forest-derived equations for open-grown trees. Three species, representative of major morphological types of agroforestry trees, were studied: green ash, Austrian pine, and eastern redcedar. Forest-derived equations provided good estimates of trunk biomass at lower diameter ranges but, as diameter increased, resulted in overestimation up to 40% for individual trees. Across the full diameter ranges, individual tree branch biomass was underestimated by 29–82%, depending on species and equation source (regional or nonregional). Although open-grown trunk and branch biomass curves diverged down and up, respectively, from their forest-derived counterparts, those for the whole tree tended to converge, albeit significantly above the forest-derived curves. Whole-tree biomass for individual trees was underestimated by at least 18%. To correct the biases, we studied the adjustment factor of forest- to open-grown tree biomass. It shows a power function with diameter. On a whole-tree basis, it was evaluated as a constant (1.2) independent of species and diameters. Application of this constant factor adjusted the biomass underestimation of three-species-mixed plantation by forest-derived equations from 21 to 4.6%, providing a cost-efficient approach to use forest-derived equations for open-grown trees in agriculture land.

Keywords: agroforestry, Austrian pine, carbon sequestration, eastern redcedar, green ash, windbreak

Publication Notes:

  • 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.

XML: View XML

Citation:


Zhou, Xinhua; Schoeneberger, Michele M.; Brandle, James R.; Awada, Tala N.; Chu, Jianmin; Martin, Derrel L.; Li, Jihong; Li, Yuqiang; Mize, Carl W. 2014. Analyzing the uncertainties in use of forest-derived biomass equations for open-grown trees in agricultural land. Forest Science. Society of American Foresters. 18 p.

 


 [ Get Acrobat ]  Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility

USDA logo which links to the department's national site. Forest Service logo which links to the agency's national site.