Real-time detection of root zone-CO2 and its potential for irrigation scheduling
- Publikations-Art
- Zeitschriftenbeitrag (peer-reviewed)
- Autoren
- Spohrer, Kluas; Zia-Khan, Shamaila; Spreer, Wolfram; Müller, Joachim
- Erscheinungsjahr
- 2015
- Veröffentlicht in
- Landtechnik
- Band/Volume
- 70/4
- DOI
- 10.15150/lt.2015.2670
- Seite (von - bis)
- 150-156
- Schlagworte
- Pflanzenwasserstatus, plant water status, root respiration, soil water content
The suitability of root zone-CO2 measurements (WR-CO2) for irrigation scheduling was investigated and evaluated. The basic assumption was that plants reduce root respiration as a
reaction to water deficit. A study with apple trees proved that measured WR-CO2 originates in large parts (56–72 %) from plant specific CO2 production (mainly root respiration). Furthermore, WR-CO2 reacts to irrigation as well as correlates with soil water content. Since WR-CO2 variations were also reflected in changes of plant water status, basic potential of WR-CO2 for irrigation demand assessment of the investigated apple trees is apparent. The transferability to other crops will be investigated.