Boyko A.N., Sidorenko M.L., Timoshinov R.V.
Вестник Алтайского государственного аграрного университета 2018; (9): 40-46
The present-day growing food demands of the population require increased agricultural production rates. For this purpose, different fertilizers are widely applied. In addition to positive influence, this agronomic technique may also exert negative consequences on the state of soil microbiocenosis. The influence of long-term application of various fertilizers (over 20 years) on soil nitrogen content and abundance of microbial group involved nitrogen cycle was studied. The experimental design was as following: 1) control, no fertilizer application; 2) mineral fertilizer application; 3) mineral fertilizer application along with manure and lime. It was found that long-term fertilizer application changed the ratio of aminoheterotrophs and aminoautotrophs. Significant aminoheterotroph and nitrogen fixer numbers decreased along with increase of aminoautotroph microflora. In all trial plots, the reduction of available nitrogen amount was revealed against the background of the degradation of microbial pool involved in nitrogen cycle.
