Determining cardinal temperatures for eight cover crop species

Growing degree days (GDD) is a tool to predict plant growth and can be adapted for use in any species, including cover crops. A limitation of the GDD calculation accurate temperature parameters used development. For most crop cardinal temperatures are not well defined literature, leading less GDD. The objective this study was determine eight Austrian winter pea (Pisum sativum), balansa clover (Trifolium michelianum), barley (Hordeum vulgare), black-seeded oats (Avena sativa), common vetch (Vicia cereal rye (Secale cereale), crimson incarnatum), hairy villosa), using chamber experiment. Seven different regimes from 4 34°C were implemented, number leaves counted day 0 21. As result, data regressed estimate each species. results research identified base (2), optimum (3), maximum (8) crops that previously reported. Five determined what recorded; −4.5 24.8°C rye, 3.9 26.6°C clover, 3.4°C clover. successful identification these will allow development biomass prediction models aid termination decision support tools.