RESPONSE OF COHON GENOTYPES TO PLANTING PATTERN, METHODS AND SCHEDULING OF IRRIGATION IN GLBC AREA OF KARNATAKA
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Date
2007-10-01
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University of Agricultural Sciences GKVK, Banglore
Abstract
Three field experiments were conducted to study the "Response of
cotton genotypes to planting pattern, methods and scheduling of irrigation
under GLBC area in medium black soils of Agricultural Research StaUon.
Arabhavi, Belgaum (Dist.) during 1998-99 and 1999-2000.
Drip irrigation (DI) gave significantly higher seed cotton yield
(2787 kg ha-9 which was 12.20 per cent higher than alternate furrow
irrigation (2484 kg ha 9- Among the cotton genotypes, ACP-71 (2839 kg
ha-9 recorded significantly higher seed cotton yield over other genotypes
viz., JK-276-8-2 (2659 kg ha-9. AH-107 (2575 kg ha 9 and DHH-11
(2470 kg ha-9. The yield increase in ACP-71 genotype was to the extent of
6.77. 10.25 and 14.94 per cent over JK-276-8-2, AH-107 and DHH-11.
respectively. Among the interaction effects, ACP-71 with drip irrigation
gave significantly higher seed cotton yield (3031 kg ha 9 over other
treatments. This was due to higher total dry matter production and yield
parameters. TTie net returns in DI with ACP-71, AH-107 and JK-276-8-2,
which were 5.87, 5.62 and 4.67 per cent higher than alternate furrow
irrigation, respectively.
Drip irrigation at 50% PE recorded significantly higher seed cotton
yield (2644 kg ha 9 tlian other treatments, which gave 25.60 and 13.08
per cent higher seed cotton yield over DI at 100% PE and DI at 75% PE
(TCGP). The maximum net returns and B: C ratio were recorded with DI at
50% PE (Rs. 42215 ha-i and 2.98).
Significantly higher seed cotton yield obtained in paired row
planting (45-135-45 x 60 cm) with drip irrigation (2349 kg ha-9. which
gave 33.39 and 24.10 per cent higher yield over furrow irrigation
( 1761 kg ha-9 and alternate furrow irrigation (1893 kg ha-9 respectively.
Paired row planting recorded significantly higher net returns
(Rs. 35636/ha) over surface irrigation (Rs. 25369/ha).
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