Influence of Different Amendments on the Dynamics of Nitrogen Fixing Bacteria Free in Chernozem Soil of Dobrogea

  • Elena DELCĂ Ovidius University of Constanta, Mamaia Avenue, no. 124, 900552, Constanta
  • Tatiana PASCU National Institute of Research and Development in Soil Science, Agrochemistry and Environment – ICPA Bucharest,
Keywords: , nitrogen fixing bacteria-free, soil fertility, biofertilizatori, humus

Abstract

The paper presents preliminary data on the abundance dynamics of nitrogen fixing bacteria-free cultivation, the effect of administration of anorganic organic amendments were. Based on 7 experimental variants of cultivation was found that the total number of nitrogen fixing bacteria-free cultivation (cyanobacteria and Azotobacter species) ranged between: 39.58x105CFU/g soil in October (V6) and 326.78x105CFU/g soil in May (V3). When soil was supplemented with manure microbial density showed a significant increase 326.78x105CFU/g dry soil compared with control variant 74.17x105CFU/g soil. Inorganic fertilizers did not have a positive effect on microbial density values, being more or less similar to those reported for the control. Bacterial density increased significantly as value, too, following the administration of specific biofertilizers (Biovin, Bactofil Professional; Mycos Green), up to (V6) 319.81x105CFU/g dry soil in May.
Published
2011-10-11