Abstract
Rose plants (Rosa hybrida 'Sonia'='Sweet Promise') were grown in heated (minimum night temperature 17°C), and unheated greenhouses with or without root heating to 21°C. These trials covered 6 growth cycles extending over two winter seasons. In the heated greenhouse, root heating did not increase yield, flower quality or plant development. In the unheated greenhouse, root-heated plants grew as well as those in the air-heated greenhouse as long as the air temperature did not fall below 6°C. When minimum night temperatures fell below 6°C, growth, yield and quality were reduced, irrespective of root temperature. Daytime plant water relations were studied in plants growing at 6 different root temperatures in the unheated greenhouse. Leaf resistance to water diffusion was lowest at optimal root temperature. Total leaf water potential was not significantly affected by root temperature.
| Original language | English |
|---|---|
| Pages (from-to) | 93-98 |
| Number of pages | 6 |
| Journal | Plant and Soil |
| Volume | 104 |
| Issue number | 1 |
| DOIs | |
| State | Published - Mar 1987 |
| Externally published | Yes |
Keywords
- air temperature
- development
- growth
- plant water relations
- root temperature
- Sonia roses
- yield