RESPONSE OF RICE (Oryza sativa L.) CULTIVARS TO THE POPULATION DYNAMICS UNDER AEROBIC METHOD
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Date
2007-09-17
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University of Agricultural Sciences GKVK, Banglore
Abstract
A field experiment entitled "Response of rice cultivars to the
population dynamics under aerobic method" was conducted at Agronomy
Field Unit, University of Agricultural Sciences, Bangalore, during Kharif
2006 in red sandy loam soil (Alfisols). The experiment was laid out in
split plot design with 15 treatment combinations consisting five
genotypes viz., KRH-2, MTU-1001, THANU, MAS-26 and MAS-946 and
three plant spacings viz., 20 cm x 10 cm, 25 cm x 25 cm, 45 cm x 20 cm
spacing.
Among plant spacings 45 cm x 20 cm recorded significantly higher
grain yield and straw yield (57.31 q ha-^ and 6.89 t ha-i respectively),
which was significantly superior over the 25 cm x 25 cm (50.57 q ha-^
and 6.44 t ha-i), and the lowest grain and straw yield was recorded with
20 cm X 10 cm (40.90 q ha-i and 5.72 t ha-^). The increased grain yield
was due to the increased growth parameters like plant height, number of
leaves per plant, leaf area, leaf area index, total dry matter and yield
parameters at a spacing of 45 cm x 20 cm.
Among rice genotypes KRH-2 recorded significantly higher grain
and straw yield (57.53 q ha-^ and 7.17 t ha-i respectively) over the MTU-
1001 (52.62 q ha-i and 6.54 t ha"i). Where as MTU-1001 was onpar with
THANU, followed by MAS-26 and MAS-946.
The study concluded that genotype KRH-2 hybrid recorded higher
grain yield over other genotypes but in case of varieties MTU-1001
recorded higher grain yield which was onpar with THANU, when grown at
45 cm X 20 cm spacing
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