Thermal use efficiency in Brassica species under different nitrogen levels.

摘要

In a field trial in Haryana in winter 1995/96, Brassica juncea, B. carinata, B. campestris and B. napus were given 0, 40, 80 or 120 kg N/ha. Cumulative heat units during crop growth were recorded, and thermal use efficiency (dry matter/heat units) of the crops with different N rates was calculated. Yield and thermal use efficiency were highest in B. juncea and lowest in B. napus, and increased with increasing N rate.