Improving Acacia auriculiformis seedlings using microbial inoculant(Beneficial Microorganisms)

作     者：Bayezid M.Khan M.K.Hossain M.A.U.Mridha 

作者机构：Assistant ProfessorInstitute of Forestry & Environmental SciencesUniversity of Chittagong Institute of Forestry & Environmental SciencesUniversity of Chittagong Plant Production DepartmentKing Saud University 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2014年第25卷第2期

页      面：359-364页

核心收录：

学科分类：0710[理学-生物学] 1007[医学-药学(可授医学、理学学位)] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 100705[医学-微生物与生化药学] 0907[农学-林学] 07[理学] 0829[工学-林业工程] 0901[农学-作物学] 071005[理学-微生物学] 10[医学] 

主　　题：Microbial inoculant (EM) germination seedling vigor leaf's pigment nodulation status. 

摘      要：A microbial inoculant, known as effective microorganisms （EM）, was applied to determine its efficacy on seed germination and seedling growth in the nursery of Acacia auriculiformis A Curm. ex Benth. The seedlings were grown in a mixture of sandy soil and cow dung （3：1） and kept in polybags; EM was poured at different concentra- tions （0.1%, 0.5%, 1%, 2%, 5% and 10%）. Seed germination rate and growth parameters of seedlings - shoot and root lengths, fresh and dry weights of shoots and roots, vigor, volume, and quality indices and stur- diness - were measured. The nodulation status influenced by EM was also observed, along with the measurement ofpigrnent contents in leaves. The highest germination rate （72%） was observed in 2% EM solution while the lowest （55%） was found in control treatment. The highest shoot and root lengths （30.6 cm and 31.2 cm respectively） were recorded in 2% EM and were significantly （p 〈0.05） different from control. Both fresh and dry weights of shoots were maximum （8.66 g and 2.99 g respectively） in 2% EM, whereas both fresh and dry weights of root were maximum （2.56 g and 1.23 g respectively） in 5% EM solution. Although the highest vigor index, volume index, and sturdiness （4450, 628 and 67.5 respec- tively） were found in 2% EM, the highest quality index （0.455） was found in 5% EM solution. The nodule number was higher at a very low （0.5%） concentration of EM but it normally decreased with the increase of concentration. The contents of chlorophyll a, chlorophyll b, and carotenoid were maximum （43.26 mg.L-1, 13.56 mg.L-1 and 17.99 mg.L-1 respectively） in 2% EM. Therefore, low concentration of EM （up to 2%）can be recommended for getting maximum seed germination and seed- ling development ofA. auriculiformis in the nursery.