Soil Water Dynamics in Subsurface DRIP Irrigation under Onion Crop

Author(s): Gopal Deokar and Sanjay Kumar

Abstract:

Micro-irrigation enhances productivity and empower cash crop as well as in some cases export oriented cultivation by using very less amount of water with better nutrient management. An experiment was conducted to study soil water dynamics under onion crop with irrigation frequencies (one, two, three and four days) and lateral spacing (45 cm and 60 cm) under subsurface drip irrigation during the spring summer season 2020 and 2021 in 2 m x 2 m micro plots, built in the field area of Department of Soil and Water Engineering, CCSHAU, Hisar, Haryana, India. At the middle of 45 cm and 60 cm lateral spacing with daily irrigation, available moisture in the root zone (0-60 cm) was 12.73 cm and 12.33 cm respectively, which was higher by 3.14% in 45 cm lateral spacing than 60 cm. Average highest (75.53 cm) and lowest (71.68 cm) plant height of two seasons was recorded in I2L45 and I4L60 treatments at 90 DAT. On the basis of soil water dynamics, superior quality and highest yield of onion in sandy loam soil, it is concluded that subsurface drip irrigation with two days irrigation interval with 45 cm lateral spacing gives better performance as compared to one, three and four days irrigation in 45 as well as 60 cm lateral spacing.

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