Forage productivity evaluation in cocksfoot (Dactylis glomerata L.) accessions
Keywords:
Cocksfoot accessions; DMP (Dry Mass Productivity); forage productivity; variation coefficientAbstract
The aim of the study is to evaluate productivity of cocksfoot accessions by estimating the mean arithmetic values of Dry Mass Productivity (DMP, g) and ecological stability (CV, %). During the period 2017-2018, in Institute of Forage Crops – Pleven, a collection of cocksfoot was studied in field non-irrigated conditions on leached black soil, by block method, with a total of 8 accessions, individually arranged plants, by seedlings at a distance of 50 / 50 cm. Each accession is represented by 25 individual plants. The forage productivity rating is performed on dry mass productivity, determined by the ratio of fresh to dry mass, and presents mean, minimum, maximum values, standard deviations on growths and years, total average for the collection. Francis and Kannenberg (1978) was used with average Dry Mass Productivity parameters (DMP, g) and average variation coefficient (CV, %) selected genotypes of each variety exceeding the average values for the collection in the two consecutive years. It has been established that the forage productivity vary depending on the genotype - variety or ecotype, maturity group; seasonal variations (growths and years), as well as growing conditions (fertilization, drought, cold, low and high temperatures, etc.). The highest average annual yield of dry mass and ecological stability for both years is taken into account in the cocksfoot accessions Dabrava, Topolovgrad and BGR1120.
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