Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Leonid POPOV, Tatiana DAVID
Currently, the problem of degradation of the effective soil fertility of the Republic of Moldova is reaching a critical scale, being unsatisfactory on 90% of the agricultural land. The annual uncompensated losses of organic matter as a result of mineralization exceed the level of 700 kg/ha, and the total deficit resulting from erosional losses is 1100 kg/year. The main factors that conditioned the establishment of a negative balance of organic matter are the lack of crop rotations, the intensification of erosion processes, the increased costs of chemical fertilizers, as well as the unfavorable climatic conditions manifested by excessive droughts with annual frequency. All together lead to the intensification of chemical, physical and biological degradation processes. In this article, the results of the research are presented, regarding the influence of microbial biofertilizers from the PGPB group (plant growth promoting bacteria) on the balance of nutrients on soils with different degrees of erosion. It was demonstrated that the application of bacteria suspensions, Ps. aureofascens, Az. chroococcum and Ps. fluorescens, contributes to the more intensive accumulation of some nutritional elements, which leads to balancing plant nutrition, as well as increasing the fertility of degraded soils.
[Read full article] [Citation]
