Ecology, Environment and Conservation Paper

Vol 21, Issue 1, 2015; Page No.(251-255)

IRRIGATION AND FERTIGATION STUDY UNDER GRAVITY FED DRIP IRRIGATION FOR OKRA (ABELMOSCHUS ESCULENTUS) CROP

Yogesh Kumar Joshi, H.K. Mittal, S.R. Bhakar and S.S. Lakhawat

Abstract

Field experiment was conducted at Plasticulture Farm, Udaipur, Rajasthan during kharif season 2013-14 to maximize the water and fertilizer use efficiency in okra crop. The experiments was laid out in factorial randomized block design with elevan treatment combinations of three irrigation levels 100, 80 and 60% of evapotranspiration (ET) and three fertigation levels, viz. 100, 75 and 50% of recommended N and K fertigation through drip irrigation and one control (Surface irrigation at 1.0 IW/CPE ratio + 100% RDF through farmer’s practice) and one treatment (100% RDF through Farmer’s practice + drip irrigation) replicated thrice. In Okra, the highest yields (21776.45 kg ha-1) were recorded in treatment drip irrigation at 80% of ET with fertigation of 75% of recommended N and K. The highest water use efficiency of 3.16 kg/m3 recorded in drip irrigation at 80% of ET with fertigation of 75% of recommended dose of N and K. Fertilizer use efficiency was recorded in drip irrigation at 60% of ET with fertigation of 50% of recommended dose of N and K doses. The maximum benefit-cost ratio (2.61) was estimated in drip irrigation at 80% of ET with fertigation of 75% of recommended dose of N and K.

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