International Journal of Agriculture, Environment & Biotechnology
Citation: IJAEB: 7(4): 817-824 December 2014
DOI Number: 10.5958/2230-732X.2014.01392.8
©2014 New Delhi Publishers. All rights reserved
AGRONOMY
Growth, yield components and yield of hybrid rice as
influenced by nitrogen levels and time of
Homo-Brassinolide application
Ranjan Kumar Dey 1 , K. Pramanik 2 , T. Saha 1 and C.K. Kundu 1
1 Department of ASEPAN, Institute of Agriculture, Visva-Bharati, Sriniketan, West Bengal-731 236, India
2 Department of Agronomy, Bidhan Chandra Krishi Vishvavidyalaya, Mohanpur, Nadia, West Bengal, India
Corresponding author: kalipada.pramanik@visva-bharati.ac.in
Paper No. 273
Received : 14 September, 2014
Accepted : 17 November, 2014
Published : 20 December, 2014
Abstract
A field experiment was conducted on hybrid rice during the kharif season of 2011 at the farm of Palli
Siksha Bhavana (Institute of Agriculture), Visva Bharati, Sriniketan, West Bengal to study the effect of
nitrogen and homo-brassionlide on growth and productivity of hybrid rice. The experiment was laid
out in FRBD with five levels of nitrogen viz. N 0 , N 60 , N 120 , N 180 and 240 kg ha -1 and three levels spraying
of homo-brassionlide viz. active tillering (AT), active tillering +panicle initiation (PI) and active tillering
+panicle initiation + flowering (FL). The results showed that hybrid rice responded well to fertilizer
application. Application of 180 kg N improved all the growth attributes such as plant height, number
of tillers m -2 and dry matter accumulation and increased the yield attributes like number of panicles
m -2 , panicle length, number of grains panicle -1 , percentage of filled grain and test weight that ultimately
led to high crop productivity. The spray of homo-brassinolide has a significant effect on plant height,
number of tillers m -2 and dry matter accumulation and increased the yield attributes like number of
panicles m -2 , panicle length, number of grains panicle -1 , percentage of filled grain and test weight that
ultimately led to high crop productivity. Among the spraying, thrice spraying of homo-brassinolide i.e.
at AT+PI + FL recorded significantly higher yield parameters and yield as compared to AT, MT+PI. The
study advocated cultivating hybrid rice 180 kg N with for its high productivity.
Highlights
significantly higher growth attributes, yield attributes crop productivity.
Keywords: Hybrid rice, nitrogen, homo-brassinolide, yield attributes, productivity
Rice is one of the most important food grain produce
yielding commercial varieties (Chaturvedi, 2005).
and consume all over the world. More than 90% of the
Nitrogen is one of the most important nutrients for
world rice is produced and consumed in Asia which
plant growth and a major factor that limits crop
is a home for 60% of the earth population. The world
yields (Elena and Rodrigo, 2008; 2002; Dai et al., 2009).
demand for rice in 2025 is estimated to be about 765
At present, both production and consumption
mt. Introduction of hybrid rice is an important step
of nitrogen fertilizer occupy the first place in the
towards amplification of rice yield. Yield of hybrid
agricultural production all over the world. The
rice is about 15-20% more than the promising high-
deficiency of nitrogen (N) is one of the most vital