METHOD OF DIAGNOSTICS OF PLANT NEEDS IN MINERAL FERTILISER ELEMENTS Russian patent published in 2015 - IPC A01G7/00 

FIELD: agriculture.

SUBSTANCE: invention relates to the field of agriculture, in particular to crop production. The method comprises the leaf diagnostics by determining responses in the form of difference of the photochemical activity of chloroplast suspension when adding the diagnosed elements to it at levels of their presence and absence of mixtures. The elements deficient for plant nutrition are determined on responses, adjusted by neutralisation of excess elements, these elements are added to the nutrient medium at a ratio proportional to the contributions to the responses. At that, the composition of mixtures comprises the preferred fertiliser elements determined by the biological features of diagnosed plants. The mixtures of elements are made according to the matrix of full factorial experiment with the number of fertiliser elements not exceeding three and the matrix of fractional replication with the number fertiliser elements greater than three. The matrix of fractional replication is created with the condition of unmixing and mixing the effects of the elements with the effects of interactions of the elements of the highest order. When creation of the matrix of fractional replication the effects of the nutrient elements most preferred for plants are not mixed, and the order of interactions when mixed effects decreases with decreasing of the preference of the fertiliser elements.

EFFECT: method enables to increase the efficiency of use of fertiliser by improving the accuracy of diagnostics of nutrient mixture.

2 cl, 4 tbl