Comparative charac­teristics of the growth and development of grain crops

Abstract

Purpose. To compare scales of grain crops growth and development.Results. Based on the generalization of the well-known scales of grain crops growth and development –Feekes scale, Haun scale, Zadoks scale, ВВСН, Kuperman and Semenova, Keller-Baglioni – comparative tables and correspondences between physical and biological time of plant development were worked out. The obtained information is of great importance for the creation of effective technological maps of growing crops, because it is the application of theoretical knowledge that helps in a timely and accurate manner to identify the stages of plant deve­lopment and timely perform the appropriate agrotechnical methods. In scales, standardized numerical designations are used for phases or stages of growth and development that have the same meaning, regardless of the year, region, or type (subtype, variety) of a grain crop. Digital signs have advantages over descriptive when entering information into a computer. The most common are the Feekes scale, Haun scale, Zadoks scale, and the unified extended BBCH scale.Conclusions. The Feekes scale is particularly useful between stages 6 and 10.5, which corresponds to the period from the appearance of the first node at the beginning of the stem elongation (stage 6) to the end of flowering (stage 10.5). The Haun scale is useful for the classification of the vegetative growth stages of grain crops. For the creation of precision farming systems and the actual computerization of cereal production, the unified extended BBCH scale is most suitable