Thermal requirements for barley maturation and leaf development in interior Alaska |
| |
| Institution: | 1. US Department of Agriculture (USDA)?Agricultural Research Services (ARS), Great Basin Rangelands Research Unit, Reno, NV 89512, USA;2. Rangeland Management Specialist, USDA-ARS, Great Basin Rangelands Research Unit, Reno, NV 89512, USA;3. Planner & Environmental Specialist, Medford/Ashland BLM, Medford, OR 97504, USA;4. Rangeland Scientist Technician, USDA-ARS, Great Basin Rangelands Research Unit, Reno, NV 89512, USA;5. Agricultural Science Research Technician, USDA-ARS, Great Basin Rangelands Research Unit, Reno 89512, NV, USA.;2. Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Summerland, British Columbia, V0H 1Z0 Canada;3. Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Quebec, Canada;4. Department of Forest and Conservation Sciences, The University of British Columbia, Vancouver, British Columbia, Canada |
| |
| Abstract: | Spring barley (Hordeum vulgare L.) is well adapted to the cool and short growing season of interior Alaska but little is known about thermal requirements for development and maturation of barley at such latitudes. Air temperature and barley development were monitored over the course of six growing seasons at Fairbanks (65°N) and Delta Junction (64°N), Alaska. These data were used to assess the base temperature (Tb) in the linear, thermal-unit model using the least variable, x-intercept, and regression coefficient methods. These methods indicated a range in Tb from 0°C to 1.5°C. At a Tb of 0°C, barley required nearly 1100°C d to mature. The phyllochron differed between early and late sowings and averaged 75°C d leaf?1. Sowing date appeared to influence the phyllochron during early vegetative growth due to differences in daylength as well as temperature. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
