%0 Journal Article
%T Urea Deep Placement in Rice as an Option for Increasing Nitrogen Use Efficiency
%A Amina Khatun
%A Hasina Sultana
%A M. A. U. Zaman
%A Shila Pramanik
%A M. A. Rahman
%J Open Access Library Journal
%V 2
%N 4
%P 1-11
%@ 2333-9721
%D 2015
%I Open Access Library
%R 10.4236/oalib.1101480
%X 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 <i>boro</i> season of 2013-2014
at the Bangladesh Rice Research Institute (BRRI) experimental farm, Gazipur and
at farmerĄ¯s field of Dhirasshram village under Gazipur Sadar Upazilla, Gazipur,
Bangladesh. Four treatments viz. 1) hand broadcasting of prilled urea as per
BRRI recommendation (T<sub>1</sub>), 2) prilled urea application by applicator (70%
of the BRRI recommended dose) (T<sub>2</sub>), 3) hand broadcasting of prilled
urea (70% of the BRRI recommended dose) (T<sub>3</sub>) and 4) N-control (T<sub>4</sub>)
were evaluated in the study. The T<sub>2</sub> treatment gave the highest grain
yield of 6.96 tĄ¤ha<sup>-1</sup> and 7.20 tĄ¤ha<sup>-1</sup> at BRRI farm and
Dhirasshram village, respectively, followed by those of T<sub>1</sub> treatment.
The highest agronomic use efficiency was obtained from T<sub>2</sub> treatment
in both the locations. Similar scenario for apparent recovery efficiency,
utilization efficiency and partial factor productivity was also observed in T<sub>2</sub> treatment. Moreover, about thirty percent prilled urea was saved due to deep
placement of urea by applicator in <i>boro</i> season.
%K Applicator
%K N Fertilizer
%K Rice (<i>Oryza sativa</i> L.)
%K N Use Efficiency
%U http://www.oalib.com/paper/3144912