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.
Original language | English (US) |
---|---|
Pages (from-to) | 173-182 |
Number of pages | 10 |
Journal | Plant and Soil |
Volume | 70 |
Issue number | 2 |
DOIs | |
State | Published - Jun 1983 |
Externally published | Yes |
Keywords
- Acetylene reduction
- Glycine max L.
- Nitrogen fixation
- Soybean