Effect of Water Management, Systems of Cultivation on Grain Yield and Energy Budget of Rice Varieties
G. V. Venkataravana Nayaka *
Department of Agronomy, ICAR-Indian Institute of Rice Research, Hyderabad-500030, Telangana, India.
G. Prabhakara Reddy
Acharya N. G. Ranga Agricultural University, Agricultural College, Mahanandi-518583, Andhra Pradesh, India.
R. Mahender Kumar
Department of Agronomy, ICAR-Indian Institute of Rice Research, Hyderabad-500030, Telangana, India.
*Author to whom correspondence should be addressed.
Abstract
Aims of Study: This research focused on assessing the grain yield and energy performance of four rice cultivars under different irrigation regimes and systems of cultivation for suitability of Andhra Pradesh and Telangana.
Experiment Design: The split-split plot design with three replications was performed for this study. The treatment comprised of two irrigation regimes viz., Alternate Wetting and Drying (AWD) and saturation as the main plot treatments, three systems of cultivation viz., System of Rice Intensification (SRI), Drum Seeding (DS) and Normal Transplanting (NTP) as the subplot treatments, and four cultivars namely DRR Dhan 42, DRR Dhan 43, MTU-1010, and NLR-34449 as the sub-sub plot treatments.
Place and Duration of Study: An experiment was conducted at the Indian Institute of Rice Research, Hyderabad, during the Autumn 2017 and 2018.
Result: Among the irrigation regimes, AWD recorded higher grain yield than saturation, Gross output energy, and net energy as compared to saturation. SRI significantly recorded higher grain yield over the NTP method. Among the different rice cultivars, DRR Dhan 43 registers remarkably higher grain yield than other cultivars during 2017 and 2018. The cultivar DRR Dhan 43 recorded higher gross output energy, net energy compared to other rice cultivars.
Keywords: Rice, input energy, net energy, energy use efficiency, grain and straw yield