Morpho-Physiological Features and Yield Attributes of Soybean Genotypes in Acid Soil

摘要

An experiment was conducted at the experimental field of the Department of Crop Botany and Tea Production Technology, Sylhet Agricultural University, Sylhet, Bangladesh during 10 April to 25 August 2013 to evaluate the morpho-physiological attributes and yield performances of nine advanced genotypes and five varieties of soybean in acidic soil. The advanced genotypes were SBM-9, SBM-15, SBM-17, SBM-18, SBM-20, SBM-22, SBM-73, SBM-78, BAU-S/70 and varieties were Binasoybean-1, Binasoybean-2, Shohag, BARI Soybean-5 and BARI Soybean-6. The experiment was laid out in a Randomized Complete Block Design (RCBD) with three replications. The results revealed that the genotypes varied considerably in the morpho-physiological characters at all growth stages and yield also and yield attributing characters. In growth analysis, SBM-78 showed the highest TDM accumulation, AGR, CGR among the genotypes followed by BARI Soybean-5 but variety Shohag had the highest RGR. The highest yield (2.50 t ha-1) was produced by BARI Soybean-5 followed by SBM-78 (2.39 t ha-1), SBM-22 (2.32 t ha-1) and BARI Soybean-6 (2.28 t ha-1) whereas the lowest yield (1.26 t ha-1) was recordrd in genotype SBM-17 but it was statistically similar to SBM-73, SBM-15, Binasoybean-2 and SBM-9. The highest yield of BARI Soybean-5 was contributed by the highest number of branches (9.0), pods plant-1(240.4), seeds plant-1(430.3). The genotype SBM-78 had the highest seed yield plant-1(48.7 g), number of branches (8.5), pods (223.6), seeds (404.7) and 100-seed weight (13.5g). It had also higher crop growth rate. The variety BARI Soybean-5 and the advanced genotype SBM-78 showed better growth performance and produced maximum grain yield due to better adaptability and superiority of yield attributing characters under acid soil condition than those of others.