Yield and quality of soybean seeds inoculated with Bacillus subtilis strains

ABSTRACT The use of growth-promoting bacteria can increase the yield and quality of seeds of several annual crops, such as soybean. Based on that, the present study aimed to evaluate the effects of the inoculation of Bacillus subtilis strains on seed treatment, evaluating the yield and quality of seeds of two soybean cultivars. The experiment was conducted in a conventional system, in an Oxisol of clayey texture, in a crop under sprinkler irrigation. The experimental design was randomized blocks, arranged in split plots with four repetitions. Treatments were composed, in the plots, of two soybean cultivars: M7110 IPRO and Brasmax Desafio RR. Within the levels of subplots, the treatments consisted of inoculation and doses of inoculant: Bacillus subtilis Pant001 strain at doses of 0, 2, 3, 4 and 5 mL kg-1, and QST713 strain at the recommended dose of 2 mL kg-1. Inoculation with the strains Pant001 and QST713 increased the yield of both soybean cultivars tested, besides improving seed quality due to the increase in the concentration of total storage proteins, seedling emergence percentage and seed vigor by the accelerated aging test.

摘要 促生菌的施用可提升多种一年生作物（如大豆）的种子产量与品质。基于此，本研究旨在探究枯草芽孢杆菌（Bacillus subtilis）菌株接种用于种子处理的效果，并评估两个大豆品种的种子产量与品质。本试验于粘质氧化土田块开展，采用常规耕作体系，作物实施喷灌管理。试验采用随机区组裂区设计，共设4次重复。主区处理为两个大豆品种：M7110 IPRO与Brasmax Desafio RR；裂区处理则为接种剂及其施用剂量：枯草芽孢杆菌Pant001菌株设置0、2、3、4、5 mL·kg⁻¹五个剂量梯度，以及QST713菌株，其推荐施用剂量为2 mL·kg⁻¹。结果表明，接种Pant001与QST713菌株均可提升供试两个大豆品种的产量，同时通过提高种子总贮藏蛋白含量、出苗率以及经加速老化试验测得的种子活力，改善了种子品质。