Effect of Biocides, Organic Manure and Blue Green Algae on Yield and Yield Attributing Characteristics of Rice and Soil Productivity under Sodic Soil Condition

A field experiment was conducted under rice-wheat system grown on partially reclaimed soil to see the effect of FYM, biocides (butachlor, BHC and zirum) and BGA together with recommended doses of N, P and K on biodiversity of microbial load, biological yield, quality of rice seeds, nutrient uptake and soil productivity. There was a linear increase in yield of rice with increasing levels of FYM with highest yield otained at 10 t ha⁻¹ of FYM. Degradation of biocides was favoured with FYM. BHC was the best among the biocides tested followed by zirum and butachlor. Algalization of rice crop substantially increased rice grain yield. Maximum yield of rice was obtained with the treatment receiving 10 t FYM ha⁻¹ plus BHC and algal inoculation. Quality of seed (particularly crude protein, lipid content and total amylose percentage) was positively affected. Carry-over effects of FYM, BGA and biocides favoured the grain production of succeeding wheat crop.