Effect of Azotobacter chroococcum application type on microorganisms in the rhizosphere and sugar beet yield

• Published in: Ratarstvo i povrtarstvo Vol. 47; no. 2; pp. 599 - 606
• Main Authors: Mrkovački, N., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia), Čačić, N., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia), Kuzevski, J., Institut za primenu nauke u poljoprivredi, Beograd (Serbia), Kovačev, L., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia), Mezei, S., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia), Nagl, N., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia), Bjelić, D., Institut za ratarstvo i povrtarstvo, Novi Sad (Serbia)
• Format: Journal Article
• Language: English; Serbian
• Published: Institute of field and vegetable crops, Novi Sad 2010
• Subjects: AZOTOBACTER; Azotobacter chroococcum; BETA VULGARIS; BIOFERTILISANT; BIOFERTILIZANTES; BIOFERTILIZERS; CARBOHYDRATE CONTENT; CONTENIDO DE CARBOHIDRATOS; CROP YIELD; http://www.fao.org/aos/agrovoc#c_10176; http://www.fao.org/aos/agrovoc#c_1298; http://www.fao.org/aos/agrovoc#c_24975; http://www.fao.org/aos/agrovoc#c_36167; http://www.fao.org/aos/agrovoc#c_6569; http://www.fao.org/aos/agrovoc#c_752; http://www.fao.org/aos/agrovoc#c_890; MICRO-ORGANISME DU SOL; MICROORGANISMOS DEL SUELO; RENDEMENT DES CULTURES; RENDIMIENTO DE CULTIVOS; RHIZOSPHARE; RHIZOSPHERE; RIZOSFERA; root yield; SOIL MICROORGANISMS; sugar beet; sugar content; TENEUR EN GLUCIDES; total microbial number; yield
• ISSN: 1821-3944; 2217-8392

Plant growth promoting rhizobacteria (PGPR) are a group of diverse soil bacteria which stimulate the growth of the host plant. It has been shown that Azotobacter chroococcum may be used as biofertilizer for increasing the yield and improving technological characteristics of sugar beet. The effect of three different ways of inoculation of sugarbeet with Azotobacter chroococcum on the production features of sugar beet and microbiological status of rhizosphere soil has been tested. One variety of sugar beet, Drena, was included in the tests in the region Rimski Šančevi, Novi Sad (Serbia), during 2008 and 2009. Five strains of Azotobacter chroococcum (1, 5, 8, 10 and 14) were used as microbiological fertilizers. There were three variations of inoculation: (A) incorporation in the soil, (B) before the fi rst cultivation, and (C) applying the liquid culture of strain on the seed before sowing. The highest increase in yield of sugar beet roots 6.25 t/ha and yield of white sugar 0.91 t/ha was achieved with strain 10 with variant of inoculation of soil before the fi rst cultivation. In both years, a positive effect of Azotobacter chroococcum was observed on the total number of microorganisms in the rhizosphere.