Hachidze A., Voloschenko V., Gogmachadze G.

Dynamics of mastering of NPK on phases of development of grain crops depending on breeds and technology of their cultivation

The purpose of the present work – to study requirement for nutrients of different breeds of winter and spring grain crops depending on their development and technologies of cultivation on the basis of the analysis of dynamics of content of nitrogen, phosphorus and potassium in them during the various periods of vegetation. Researches have been spent on experimental plots of Moscow agricultural research institute "Nemchinovka" on sod-podzol high-cultivated soil. The findings allow to calculate requirement for nutrients on each breed individually for formation of planned or maximum possible level of yield with high quality, and also to define norms of basic fertilizer and reasonability of carrying out of additional fertilizing in the course of crop vegetation.

Keywords: BREEDS of GRAIN CROPS, MINERAL NUTRITION of PLANTS, FERTILIZATION SYSTEMS