Vol. 7, Issue 4 (2019)
Effect of different irrigation methods and saline water on soil properties in tomato (Solanum lycopersicum) crop under vertisols of Tungabhadra project command
Author(s): Rajkumar RH, Nemichandrappa M, Anilkumar T Dandekar, Ayyanagowdar MS, Polisgowdar BS, Satyanarayana Rao and Vishwanatha J
Abstract: The experiment was conducted at Agricultural Research station, Gangavathi (Karnataka) during 2018-19 and 2019-20 to study the effect of three (Furrow-M0, Surface drip-M1 and Subsurface drip-M2) different irrigation techniques and five (0.65 dS m-1-S0 normal water, 2 dS m-1-S1, 3 dS m-1-S2, 4 dS m-1-S3 and 5 dS m-1-S4) different irrigation water salinity levels on soil properties viz., soil pH and soil salinity in tomato (Solanum lycopersicum) crop under Vertisols of Tungabhadra Project Command. The soil pH was maximum at the top surface during after harvest in first year and decreased in second year during before sowing under all the treatments. In subsurface drip technique the pH at the 15-30 cm was less as compared to 0-15 cm because of buried drip laterals to a depth of 20 cm. In case of surface drip the top surface (0-15 cm) was having slightly less pH as compared to (15-30 cm) after harvest because of frequent application of water at the top surface through drippers. In case of surface drip, more salt were present at 20 cm distance apart from the dripper at 0-15 and 15-30 cm depths. In case of subsurface drip irrigation, accumulation of salts was more at the soil surface but it was lesser at near and below the buried dripper but increased with distance from the dripper. Due to upward capillary action, more salts accumulated on the top surfaces and at periphery of the water front outside the root zone and less at the root zone of the crop because of continuous salt leaching downwards under subsurface drip. More salt accumulation was observed as salinity level increases. The soil salinity for tomato crop in the active root zone varies within a narrow range. Hence, the salinity was not much affected to the plant roots (20 cm depth). Therefore subsurface drip irrigation can be preferred over furrow irrigation whenever saline water is used under drip irrigation upto a threshold limit of 2 dS m-1.
Pages: 2952-2957 | 285 Views 84 Downloads
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How to cite this article:
Rajkumar RH, Nemichandrappa M, Anilkumar T Dandekar, Ayyanagowdar MS, Polisgowdar BS, Satyanarayana Rao, Vishwanatha J. Effect of different irrigation methods and saline water on soil properties in tomato (Solanum lycopersicum) crop under vertisols of Tungabhadra project command. Int J Chem Stud 2019;7(4):2952-2957.
