INFLUENCE OF ALTERNATE WETTING AND DRYING IRRIGATION REGIMES AND NITROGEN MANAGEMENT PRACTICES ON GROWTH AND YIELD ATTRIBUTING CHARACTERS OF RICE
Journal Title: International Journal of Agriculture Sciences - Year 2017, Vol 9, Issue 3
Abstract
A field study was conducted to investigate the effect of different alternate wetting and drying irrigation regimes to nitrogen management practices on the growth attributes, yield attributes and yield of Rice. The experiment was laid out in a split –plot design with three replications. Main plots were assigned with five irrigation regimes as i.e., I1- Conventional practice of Irrigation (CI) (5 cm depth of irrigation one day after the disappearance of previously ponded water), I2, I3, I4- i.e., AWDI at 10, 15 and 20 cm drop of below surface water using monitoring device field tube and I5- SRI irrigation practice (2.5 cm depth of irrigation and reirrigation given after the formation of hair line cracks). The sub plots were experimented with nitrogen management practices viz., N1-two equal split application of 100 % RDN at basal and Panicle Initiation (PI) stages, N2- four equal split application of 100 % RDN at basal, Active Tillering (AT), PI and heading stages, N3- three equal split application of 75 % RDN at AT, PI and heading stages and N4- LCC based N application. Among the irrigation regimes SRI method of irrigation practice on bar with AWDI at 10 cm and CI recorded higher growth attributing characters viz., Plant height, Root length, LAI, Dry Matter production, total tillers m 2 and yield attributing characters viz., panicles m 2, panicle length, number of grains panicle 1, ill-filled grains percentage, grain and straw yield. The nitrogen management practices also strong influence on the growth and yield. The four equal split application of 100 % RDN fertilizer at basal, AT, PI and heading stages and LCC based N application to be the better managements among the nitrogen management treatments. And also the higher water use efficiency was recorded in AWDI at 15 cm drop of water table it because of the maintenance of optimum level of yield.
Authors and Affiliations
V. KANNAN
Keywords
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