Productivity and profitability of rice varieties grown and nurtured organically on a 5 year old zero chemical applied soil base

Abstract

A field experiment entitled “Productivity and profitability of rice varieties grown and nurtured organically on a 5 year old zero chemical applied soil base” was conducted at Agricultural Research Station, Faculty of Agricultural Sciences, (IAS), SOADU, Bhubaneswar, Odisha in Kharif, 2022. The experiment was laid out in spilt plot design with three replications and included six varieties, three from high yielding (Maudamani, Naveen and Kalinga Dhan 1201) and three from traditional groups (Kamal, Poornabhog and Nua Chhinikamini) were allocated to main plots whereas four organic manure treatments were assigned to sub plots alongwith no manure treatment(Mo). Application of manures was based on recommended dose of nitrogen (RDN) of respective varieties with 50 % N(M₁) and 100% N(M₂) applied half each through FYM and Vermicompost. Treatment M₃ was devoted to application of organic liquid formulations. Across the treatments variety Poornbhog was significantly superior with respect to grain yield (3250 kg ha^-1) and associate characters EBT/m² (234), number of filled grains(114), panicle length(25.5 cm) and panicle weight(2.8 g) along with highest net return (Rs.1,33703/ ha) and B-C ratio(2.2). Among the HYV Naveen was significantly superior over Kalinga Dhan 1201.Students‘t’ test showed no significant difference in mean yield of varieties of both the groups. Treatment M₃ produced significantly higher yield (3235kg/ ha along with maximum NR (Rs.94514/ ha) over others. All the verities under organics showed almost similar plant height test weight and duration though Poornabhog and Kalinga Dhan 1201 matured earlier by 10 days than their basic varietal characters. Interaction was significant and all the varieties produced their best under M₂ treatments. Application of organic liquid formulations showed favourable effect on yield over M₀.Partial factor productivity and recovery efficiency was higher at lower level of N application.