Effect of foliar and soil application of different agrochemicals on phenology, physiological parameters and productivity of rice (Oryza sativa L.)

Abstract

The experiment was carried out to study the influence of different agrochemicals on yield and yield components of rice variety GNV10-89 at Agricultural Research Station, Gangavati, UAS, Raichur, Karnataka. The experiment was laid out in a randomized complete block design with three replications during kharif 2017. The experiment consisting of 10 treatment along with 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 revealed that the yield and yield attributes of rice was differed significantly 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). Foliar spray ofT2 (NPK- 19:19:19 @ 1.0 %) recorded the significantly higher Phenology and physiological parameters, number of filled spikelets per panicle (232.9), percent increase of filled spikelet’s over control (33.6), least number of unfilled spikelets per panicle (61.3), less per cent of chaffyness (20.9 %), 1000 grain weight (23.6 g), the highest grain yield (8709.8 kg ha-1) and percent increase of grain yield over T10 (control) (22.9 %) as compared to rest of the treatments. Soil application of T1 (N- 25 % extra) was the third highest among 10 different treatments.