Impact of Water Management on Rice Varieties (Oryza Sativa L.), Yield and Water Use Efficiency under Alternate Wetting and Drying Method in Puddled Soil
M Sharath Chandra1 and K Avil Kumar2
1Department of Agronomy, College of Agriculture, Professor Jayashanakar Telangana State Agricultural University, Rajendranagar, Hyderabad – 500 030, Telangana, INDIA
2Regional Agricultural Research Station Palem- 509 215 Nagar Kurnool District. PJTSAU, Telangana, INDIA
Keywords: AWD-alternate wetting and drying, Rice varieties, Yield, WUE-Water use efficiency
https://doi.org/10.37273/chesci.cs20510118 • PDF
This study was aimed to investigate water saving strategies in the paddy field and to evaluate the performance of some newly released rice varieties. Alternate wetting and drying method is a water saving method to improve yield and water use efficiency (WUE). A field experiment was conducted on sandy clay soil at Agricultural College farm, PJTSAU, Rajendranagar, Hyderabad during kharif, 2016 in a split plot design with three replications. The treatments comprised of three irrigation regimes (irrigation of 5 cm when water level falls below 5 cm from soil surface in field water tube i.e alternate wetting and drying irrigation -AWDI, irrigation of 5 cm, at one day after disappearance of water on the surface of the soil- DADSW and recommended submergence of 2-5 cm water level as per crop stage) as main treatments and four rice varieties (Telangana sona, KunaramSannalu, Bathukamma and Sheethal) as sub plots treatments. The data recorded indicate that recommended submergence of 2-5 cm water level recorded significantly higher grain and straw yield over AWDI of 5 cm and was at par with AWDI of 5 cm at one DADSW. Water productivity was higher with irrigation of 5 cm at one DADSW and was at par with irrigation of 5cm when water level falls below 5cm.Bathukamma produced higher grain yield, straw yield and water productivity as compare to KunaramSannalu, Sheethal and Telangana Sona. Based on the results, it can be concluded that among four rice varieties, Bathukamma recorded higher yield with recommended submergence and water productivity was higher with irrigation of 5 cm at one DADSW. There was no significant interaction effect between different rice varieties and irrigation regimes on yield and water use efficiency.
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