TITLE:
Urea Deep Placement in Rice as an Option for Increasing Nitrogen Use Efficiency
AUTHORS:
Amina Khatun, Hasina Sultana, M. A. U. Zaman, Shila Pramanik, M. A. Rahman
KEYWORDS:
Applicator, N Fertilizer, Rice (Oryza sativa L.), N Use Efficiency
JOURNAL NAME:
Open Access Library Journal,
Vol.2 No.4,
April
22,
2015
ABSTRACT: Prilled urea applicator is a nitrogen saving technology. Aiming to find
out the efficiency of BRRI prilled urea applicator, a field experiment was
conducted during boro season of 2013-2014
at the Bangladesh Rice Research Institute (BRRI) experimental farm, Gazipur and
at farmer’s field of Dhirasshram village under Gazipur Sadar Upazilla, Gazipur,
Bangladesh. Four treatments viz. 1) hand broadcasting of prilled urea as per
BRRI recommendation (T1), 2) prilled urea application by applicator (70%
of the BRRI recommended dose) (T2), 3) hand broadcasting of prilled
urea (70% of the BRRI recommended dose) (T3) and 4) N-control (T4)
were evaluated in the study. The T2 treatment gave the highest grain
yield of 6.96 t·ha-1 and 7.20 t·ha-1 at BRRI farm and
Dhirasshram village, respectively, followed by those of T1 treatment.
The highest agronomic use efficiency was obtained from T2 treatment
in both the locations. Similar scenario for apparent recovery efficiency,
utilization efficiency and partial factor productivity was also observed in T2 treatment. Moreover, about thirty percent prilled urea was saved due to deep
placement of urea by applicator in boro season.