Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

login

Log in to your personal account or through your institution.

A non-destructive field assay for soybean nitrogen fixation by acetylene reduction

R. F. DENISON, T. R. SINCLAIR, R. W. ZOBEL, M. N. JOHNSON and G. M. DRAKE
Plant and Soil
Vol. 70, No. 2 (1983), pp. 173-182
Published by: Springer
Stable URL: http://www.jstor.org/stable/42934179
Page Count: 10
  • More info
  • Cite this Item
A non-destructive field assay for soybean nitrogen fixation by acetylene reduction
Preview not available

Abstract

A system for employing open-ended root chambers to measure in situ acetylene reduction rates under field conditions is described. Gas mixtures containing about 2 mbar acetylene were continuously flowed through the chambers providing a continuous record of acetylene reduction. These chambers have been used to measure acetylene reduction rates of soybeans during three growing seasons. The system has proved to be reliable with a high degree of precision. The large amount of plant-to-plant variability observed in N₂ fixation research has been confirmed by the data collected with this system. However, such variability in physiological studies can be reduced by using a non-destructive system to compare the response of an individual plant with its rates before treatment.

Page Thumbnails

  • Thumbnail: Page 
173
    173
  • Thumbnail: Page 
174
    174
  • Thumbnail: Page 
175
    175
  • Thumbnail: Page 
176
    176
  • Thumbnail: Page 
177
    177
  • Thumbnail: Page 
178
    178
  • Thumbnail: Page 
179
    179
  • Thumbnail: Page 
180
    180
  • Thumbnail: Page 
181
    181
  • Thumbnail: Page 
182
    182