Influence of different agrochemicals on morphological and yield traits of rice (Oryza sativa L.) grown under northern dry zone of Karnataka

A field experiment was conducted at Agricultural Research Station, Gangavati, University of Agricultural Sciences, Raichur, Karnataka to study the influence of different agrochemicals on morphological parameters and yield and yield components of rice variety GNV10-89. The experiment was laid out in randomized complete block design with 3 replications during kharif season 2017. The experiment consisting of 10 different agrochemicals treatment along with a control i.e., T1: 25 % extra nitrogen (N) soil application, T2: NPK (19:19:19) @ 1.0 %, T3: triacontanol (2.0 ml l-1), T4: GA3 (50 ppm), T5: nitrobenzene (20 ppm), T6: salicylic acid (500 ppm), T7: 6-BAP (20 ppm), T8: borax (0.2 %), T9: T3 + T8 foliar applications and T10: control. The results indicated that the analysis of variance was significant for all the morphological characters except unproductive tillers by foliar as well as soil application of different agrochemicals at 65 (10 days before panicle initiation) and 85 days after transplanting (10 days after panicle initiation). The treatment T2 (NPK- 19:19:19 @ 1.0 %) recorded the significantly higher number of productive tillers per hill (17.4), more number of green leaves per hill (69.8), less number of senescent leaves per hill (7.7) and higher flag leaf length (43.7 cm) except plant height (98.2 cm). The significantly higher plant height (130.5 cm) was recorded by foliar spray of T4 (GA3-50 ppm) as compared to other treatment. T2 (NPK -19:19:19 @ 1.0 %), recorded the significantly higher grain yield (8709.8 kg ha-1) than rest of the treatment.