BIOCHAR IN CONJUNCTION WITH REDUCED DOSES OF MINERAL FERTILIZERS INCREASED YIELD ATTRIBUTES AND YIELD OF RICE (CV. BRRI DHAN29)

Abstract

Recently, biochar (BC) applied in optimized quantities has emerged as an effective organic amendment for improving the physico-chemical features of the soil along with boosting the yield attributes of cereals. In the research field of Hajee Mohammad Danesh Science and Technology University (HSTU), Dinajpur a field experiment was directed to assess the impact of BC implication united with reduced doses of recommended chemical fertilizers (RDF including N, P, K and S) on the growth and yield of rice (cv. BRRI dhan29). It was comprised of five treatments viz. T-1= Recommended doses of RDF, T-2 = BC 10 t ha(-1), T-3 = BC 10 t ha(-1) + half RDF, T-4= Biochar 7.5 t ha(-1) + half RDF and T-5 = BC 5 t ha(-1) + half RDF. The experimental design was the regular arrangement of Randomized Complete Block Design (RCBD) along with four replications. The T-1 treatment recorded the maximum plant height (103.00 cm) and the number of tillers hill(-1) (26.10) which remained statistically identical to T-3. Likewise, T-3 out performed rest of regimes by recording the highest values of panicle length (24.89 cm), grains number panicle-1 (195.40), filled grains number panicles(-1) (191.10), and 1000-grain weight (25.53 g). Moreover, the same treatment recorded for grain yield (7.82 tha(-1)) and straw yield (8.76 t ha(-1)) which was statistically at par to T-1 (7.46 and 8.72 t ha(-1), respectively). Furthermore, T3 also remained superior as for as biological yield (16.58 t ha(-1)) of rice was concerned. The outcomes of this trial reveal that BC (10 t ha(-1)) application have potential to reduce CF dose up to 50% for improving the yield attributes and grain output of rice. (cv. BRRI dhan29).