Akademik Veri Yönetim Sistemi
International Symposium on "Soil Science and Plant Nutrition", Samsun, Türkiye, 8 - 09 Aralık 2023, ss.113-117
In this study analyzed, with a greenhouse test, the impact of Azotobacter chroococcum indigenous isolate inoculation on the microbial respiration and microbial biomass C content of soils with different organic waste added. For this purpose, wheat straw, rice straw, tobacco waste, soybean stem were used as organic waste while RK49 race was used as the indigenous A.chroococcum isolate. 5% over dry weight doses of organic wastes was added to loamy soil within pots of 5 kg, and afterwards, the soils were inoculated adding 10 ml of A.chroococcum isolate from liquid culture (109 CFU/ml). The seeds of wheat (Triticum aestivum) were planted manually to each pot (15 pieces/pot). The test lasted for 124 days. The microbial respiration (BSR) and microbial biomass C (Cmic) contents of soil samples obtained from each pot was determined at the end of harvest, and changes in microbiological characteristics of soils caused by the applications were analyzed. At the end of the experiment, it was determined that the BSR and Cmic content of the soils increased considerably as a result of the application of different organic materials. It was also determined that the BSR and Cmic content increase of the soils inoculated with A.chroococcum RK49 isolate besides different organic wastes was higher than that of soils without inoculation. While the highest BSR content was attained in tobacco waste application in soils without A.chroococcum RK49 isolate inoculation, the highest Cmic content was determined where A.chroococcum RK49 was inoculated with tobacco waste.
Key words: Organic waste, Azotobacter chroococcum, soil
respiration, microbial biomass carbon