Root temperature and calcium level effects on winter wheat forage: I. Shoot and root growth.

(...) No significant differences due to Ca levels were found for growth rates of the shoots and roots (dry weight basis), nor for root extension rates. Growth rates of the shoots and roots (dry weight basis), and root extension rates were significantly slower for plants grown at 8°C compared to those grown at 16°C. Lateral root growth, in particular, was depressed in plants grown at a cold root temperature. The mean root diameter was significantly greater at 8°C than at 16°C, apparently due to the greater proportion of main root axes with larger root diameters at a cold root temperature. (...)