Abstract:
Research and Technology Transfer Station, Chiplima, Sambalpur, Odisha in order to find out the most
remunerative irrigation regimes and nitrogen levels in aerobic rice for higher yield, water use efficiency and
economics. The experiment was laid out in split plot design with 3 replications. Main plot treatments consist of
four irrigation regimes (irrigation at 3 days interval, 5 days interval, 7 days interval and 9 days interval) and
in sub plot treatments consist of four levels of nitrogen (no nitrogen, 40 kg ha -1, 60 kg ha-1 and 80 kg ha-1). The
pooled mean result revealed that decreasing irrigation interval increased the values of growth and yield
attributes, grain yield and B:C ratio. Irrigation at 3 days interval with regards to growth and yield attributes
was significantly superior to rest other higher irrigation interval. Whereas in grain yield and B:C ratio ,
irrigation at 3 days interval was at par with irrigation at 5 days interval and significantly superior to rest other
higher irrigation interval. However, field water use efficiency was maximum at 7 days interval which was at par
with 5 days interval. The application of nitrogen at 80 kg ha -1 recorded significantly higher yield attributes,
grain yield, field water use efficiency and B:C ratio than rest other lower levels of nitrogen.
