%0 Journal Article
%T Rice Yield Gap Minimization in Central Bangladesh: Using and Adapting Existing Technologies
%A Md. Khairul Quais
%A Md. Mahbubur Rahman Dewan
%A Amina Khatun
%A Hasina Sultana
%J Open Access Library Journal
%V 2
%N 7
%P 1-13
%@ 2333-9721
%D 2015
%I Open Access Library
%R 10.4236/oalib.1101641
%X Rice (<i>Oryza sativa</i> L.) in the dry season (Boro) followed by rice
in the wet season (Aman) is the major cereal cropping system in Bangladesh. The
average productivity (7 Mg¡€ha<sup>©1</sup>) of this system is far below attainable
yields (14 Mg¡€ha<sup>©1</sup>) in farmers¡¯ fields, resulting in a large yield
gap mainly due to farmers¡¯ traditional management practices. Narrowing yield
gap is a vital complementary strategy in
improving rice yield and consequently enhancing food security. We evaluated
BRRI recommended management practices, BRRI recommended management
practices along with two N management options
(leaf color chart and Urea Super Granule) and farmers¡¯ crop management practices integrated with quality seed, leaf color
chart (LCC) and Urea Super Granule (USG) in farmers¡¯ fields of Kapasia,
Gazipur over 6 contiguous seasons during 2009-2012. Across years, all the management
options increased grain yields compared with the farmers¡¯ practice (FP) by 1.12
Mg¡€ha<sup>©1</sup> in Aman and 0.84 Mg¡€ha<sup>©1</sup> in Boro season. The
higher yield response (43%) occurred with BRRI recommended management practices
followed by BRRI recommended management practices in combination with Urea
Super Granule (42%) as N source (BRRI-USG). Yield advantage of 41% could be
attained by BRRI recommended management practices with leaf color chart (LCC)
aided N management (BRRI-LCC) while this was 22%, 13% and 13% higher than FP
(farmer¡¯s practice) when only quality seeds, USG and LCC were used with
farmers¡¯ management practice. BRRI Rec., BRRI-LCC and BRRI-USG¡€management
options reduce the yield gap of FP by 41%, with an average of 2.87 Mg¡€ha<sup>©1</sup>.
When farmers adopted FP-QS, FP-USG and FP-LCC management options, they reduced
the yield gap of FP by 21%, 13% and 12%, with an average of 1.49, 0.88 and 0.81
Mg¡€ha<sup>©1</sup>, respectively. The average added net returns with BRRI Rec.,
BRRI-LCC and BRRI-USG¡€management options were US$175 to US$362 ha<sup>©1</sup> in the wet season and US $158 to US $263 ha<sup>©1</sup> in the dry season. BRRI
management practices and BRRI management practices integrated with two N
management options, either LCC or USG has the potential to boost rice yield and
consequently total rice production in Bangladesh.
%K Rice-Rice Cropping System
%K Yield Gap
%K Productivity
%K Net Profit
%U http://www.oalib.com/paper/3146994