Influence of spray drying technique on survival of bradyrhizobium onto sodium alginate based carriers
2015
Buntić, Aneta V. (Institute of Soil Science, Belgrade (Serbia). Department of Microbiology) | Stajković-Srbinović, Olivera S. (Institute of Soil Science, Belgrade (Serbia). Department of Microbiology) | Rasulić, Nataša V. (Institute of Soil Science, Belgrade (Serbia). Department of Microbiology) | Kuzmanović, Đorđe Ž. (Institute of Soil Science, Belgrade (Serbia). Department of Microbiology) | Delić, Dušica I. (Institute of Soil Science, Belgrade (Serbia). Department of Microbiology) | Dimitrijević-Branković, Suzana I. (Faculty of Technology and Metallurgy, Belgrade (Serbia). Department of Biochemical Engineering and Biotechnology)
Application of microbial inoculants to the soil can improve the nutrient uptake by plants and increase the productivity of the crops. Inoculants should ensure a suitable microenvironment and long survival of bacteria in biological fertilizer and after application to seeds. The immobilization of rhizobia onto a carrier can involve the covering and protecting of the microorganisms. Spray drying is a relatively new immobilization technique for the immobilization of microorganisms onto a carrier and it is rarely used for rhizobia. The survival of bacteria during spray drying immobilization onto alginate based carriers was just 8.1 and 6.8% for Bradyrhizobium spp. strains 542 and 526. The working temperature during drying process was high (outlet 50°C) and it presents more than temperature limit for rhizobia survival. Accordingly, the obtained results were justifiably low in value. The presence of sucrose in liquid inoculant had a positive influence on the survival of rhizobia during immobilization.
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