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Effect of irrigation regimes and colored plastic mulches on growth and yield of sweet corn (Zea mays var. saccharata) in Tamil Nadu 


Citation :- Effect of irrigation regimes and colored plastic mulches on growth and yield of sweet corn (Zea mays var. saccharata) in Tamil Nadu. Crop Res. 61: 269-275
SHALINI C, SARAVANA KUMAR M, RAJESHKUMAR A, RAMADASS S, RAJASEKAR M AND MARY AMRIDHA SHIVANI A saravanm14@srmist.edu.in
Address : SRM College of Agricultural Sciences, SRM Institute of Science and Technology, Baburayanpettai, Chengalpattu-603201, Tamil Nadu, India
Submitted Date : 12-05-2026
Accepted Date : 12-06-2026

Abstract

Sweet corn productivity is limited by water scarcity and inefficient irrigation practices in semi-arid regions. Drip irrigation and plastic mulching can improve water use efficiency and crop growth. However, their combined effects under different mulch colours and irrigation regimes are not well understood under Tamil Nadu conditions. Therefore, a field experiment was conducted to evaluate the effect of different irrigation levels and coloured plastic mulches on the growth, physiological, and root parameters of sweet corn (Zea mays var. saccharata) during summer season of 2026 in Department of Agronomy, SRM College of Agricultural Sciences, SRM Institute of Science and Technology, Baburayanpettai, Chengalpattu 603 201, Tamil Nadu. The study carried out with Randomized Block Design comprising eleven treatments with three replications involving three irrigation levels (75%, 100%, and 125% ETc) combined with black, silver-on-black, and white-on-black plastic mulches, along with control and farmers’ practice. The results revealed that growth, physiological attributes and yield of sweet corn were significantly influenced by irrigation regimes and mulch types. Drip irrigation at 125% ETc combined with silver-on-black plastic mulch recorded the highest plant height (77.3 and 186.2 cm at 30 and 60 DAS), stem girth (5.9 and 8.1 cm), internodal length (8.7 and 22.1 cm), leaf area index (1.74 and 3.67), SPAD value (40.68 and 42.68), root length (20.1 and 36.6 cm), dry matter production (103.57 and 780.21 g/m²), cob yield (19,260 kg/ha) and fodder yield (38,640 kg/ha). The superior performance was attributed to improved soil moisture availability, favourable microclimatic conditions and enhanced photosynthetic activity. The study concludes that drip irrigation at 125% ETc in combination with silver-on-black plastic mulch is an effective strategy for improving growth, physiological performance and productivity of sweet corn.

Keywords

Drip irrigation leaf area index plastic mulch sweet corn yield  


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