Drip Irrigation Levels in Chilli Based Intercropping Systems
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Date
2018-08
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University of Agricultural Sciences, Dharwad
Abstract
A field experiment was conducted to study the drip irrigation levels in chilli
based intercropping systems during kharif, 2017-18 at IWMRC Belavatgi, UAS,
Dharwad with 9 treatments. The treatment comprised of two levels of irrigations 1.0
ETo and 0.8 ETo and four intercropping systems chilli + onion, chilli + garlic, chilli +
groundnut and chilli + ginger and chilli + onion- cotton as control. The treatments were
replicated thrice in strip-plot design and intercrop yields are analyzed under ‘T’ test.
Irrigating chilli at 0.8 ETo irrigation recorded higher fruit yield (750.3 kg ha-1)
as compared with 1.0 ETo level of irrigation (665.3 kg ha-1). Intercropping systems did
not affect yield and yield parameters of chilli. Intercropping of chilli + onion with
irrigation at 0.8 ETo recorded higher yield and yield parameters of chilli as compared
to other treatment combinations and control treatment. Significantly higher water use
efficiency of 2.88 kg/ha-mm was registered in chilli + onion irrigated with 0.8 ETo and
it was on par with chilli + groundnut irrigated at 0.8 ETo (2.69 kg/ha-mm) and
significantly lower water use efficiency of 0.97 kg/ha-mm recorded in surface irrigated
control plot of chilli + onion – cotton. Non significant yield difference was found in all
intercrops (onion, garlic, groundnut and ginger) between the two levels of irrigation.
Significantly higher chilli equivalent yield (1,954 kg/ha), gross returns (` 2,93,100
ha-1), net returns (` 2,20,364 ha-1) and B:C ratio (4.03) was recorded in chilli + onion
irrigated at 0.8 ETo. The next best treatment combination was chilli + groundnut
irrigated at 0.8 ETo. Significantly lower net returns were recorded in surface irrigated
chilli + onion – cotton intercropping system (` 98,785 ha-1).