Polovyy V. Agroecological monitoring and soils fertility reproduction in North-West Part of Ukraine

Evolutionary changes of soil's agrochemical status and productivity in North-West Part of Ukraine depending on the farming intensification are estimated. New methodical approaches as for agrochemical monitoring are propounded. The effect of long-term fertilization and liming in crop rotations on their productivity dynamics and humus status, nutrient regime, biological and physical-chemical indexes of soddy podzolic and gray wooded soils are fixed in the stationary field experiments. The comperative appreciation of different variants of organic fertilizer system in crop rotation with integrative plant protection and without it is carrying out. It was determined that only organic fertilization system with application of 14 tons of manure and straw on 1 hectare of rotation area allow to maintain the humus and nutrient self-supporting balance in soil. As for organic fertilization system based on green manure crops and secondary crop production, it do es not guarantee supply of soil's fertility reproduction. The new fertilization systems which are differentiated by forms of organic and doses of mineral fertilizes are scientifically based, also their influence on gray wooded soils fertility, crop rotation yielding and quality of growing crops are determined. Quantitative and qualitative parameters of soils agrochemical status degradation changes by long-term land-use without fertilizes are obtained and the efficiency of measures complex as for their fertility restoring is worked out.