National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
A field experiment was carried out at the Instructional-cum-Research (ICR) Farm, Assam Agricultural University, Jorhat during 2017 to develop the irrigation schedule of direct seeded early ahu rice under medium land situation and to find out the suitable nutrient management practices for direct seeded early ahu rice to suit the variability in rainfall pattern. The treatments consisted of four irrigation regimes viz. irrigation at 80% available water till onset of pre-monsoon rain (I1), irrigation at 70% available water till onset of pre-monsoon rain (I2), irrigation at 60% available water till onset of pre-monsoon rain (I3) and rainfed (I4) as main plot and three nutrient management treatments viz. full P as basal + ½ N and ½ K at 20 days after sowing (DAS) + ½ N and ½ K at 40 DAS (N1), full P as basal, 1/3 N and 1/3 K as basal + 1/3 N and 1/3 K at 20 DAS + 1/3 N and 1/3 K at 40 DAS (N2) and full P as basal, ½ N and ½ K as basal + ¼ N and ¼ K at 20 DAS + ¼ N and ¼ K at 40 DAS (N3) as sub plot and control (transplanted early ahu rice with recommended water and fertilizer management practices). Experimental findings revealed that irrigation at 80% available water till onset of pre monsoon rain (I1) recorded the highest values for all the morphological and physiological parameters along with the yield and yield attributing characters of the crop. The highest grain yield (39.83 q/ha) and straw yield (90.96 q/ha) were recorded at irrigation at 80% available water (I1). Among the nutrient management practices, the highest values of all the morphological and physiological parameters along with the yield and yield attributing characters of the crop were recorded under full P as basal + ½ N and ½ K at 20 DAS + ½ N and ½ K at 40 DAS (N1). This treatment also recorded the highest grain yield (34.16 q/ha) and straw yield (83.45 q/ha). The experiment did not show any significant difference between direct seeded crop and transplanted crop with respect to growth parameters, yield attributes and yield. Direct seeded crop recorded the higher net return and benefit-cost ratio over the transplanted rice.
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