Effect of organic sources of nutrients on growth physiology and yield components of scented rice (Oryza sativa L.)

Abstract

A field experiment was conducted to evaluate the effect of different organic sources of nutrientson growth physiology and yield components of scented rice, variety KetekiJoha at Regional Agricultural Research Station, AAU, Titabor during 2017 and 2018. Eight treatments were evaluated in randomized block design with three replications. The results revealed that the application of different proportion of organic sources of nutrients significantly improved the growth physiology and yield parameters of scented rice over the control. Among the treatments,the application of green manure (2.5 t ha-1) + Vermicompost (2.5 t ha-1) + Azolla (20 kg ha-1) + biofertilizer consortium (4 kg ha-1 seedling) as root dip + rock phosphate (17 kg ha-1) recorded the highest grain yield (38.05 qha-1) with significant increase in yield components of the crop.Application of green manure + Vermicompost + Azolla + biofertilizer consortium as root dip + rock phosphate significantly produced higher plant height (78.5cm), leaf area index (4.3), flag leaf area (35.3cm-2), total Chlorophyll content (3.5mgg-1fwt), panicles m-2 (304.3), panicle length (28.2 cm), grains panicle-1(108.4),panicle weight (2.7 g), harvest index (35.2 %) and 1000 grain weight(23.6 g). The organic treatments also significantly enhanced the growth physiology viz., crop growth rate, specific leaf weight and net assimilation rate of the plant.