Harmonization of the requirements for varietal purity of feed grass and legume seeds in accordance with international OECD schemes

Abstract

Purpose. In order to determine the reliability of the new method of field inspection of varietal seed crops of cereals and legumes (leguminous grasses, soybeans, fodder beans, lupine, lentils, beans, peas, chickpeas,) to conduct a comparative evaluation of methods according to the current scheme operating in Ukraine and that acting in accordance with the OECD international requirements (Organization for Economic Co-operation and Development) for the “Grass and legume seed” group and to determine the number of atypical plants in 10 m2 test plots. Methods. Field, laboratory, visual, measuring, weighing, quantitative, test reap method, economic-mathematical, statistical. Results. The normative database for the development of methods for field inspection of seed forage crops and the establishment of their varietal purity according to OECD requirements by inspecting 10 m2 test plots (10 ones per 10 hectares) has been determined. At the same time, the number of atypical plants on crops of pre-basic and basic seeds of cereal grasses should not exceed 3-4; 4-5 pcs.; for legumes, respectively – 3-10; 11-20 pcs. For certified seeds (CH1-2) of the first and second year of generation, these figures are: for cereals –10-20; 40-70 pcs, for legumes – 21-40; 41-60 pcs respectively. Conclusions. The results of the research confirm the greater informational objectivity of the methodology developed on the basis of OECD schemes, compared to the current methodology in Ukraine. Compliance with varietal purity in accordance with international requirements under the OECD scheme (regulation of additional atypical plants of the main variety) and seed growing technology in the primary stages of seed production provided production of 6.78; 5.62; 5.78 t of pre-basic and basic seeds of 4 species of 8 varieties of perennial legumes and 20.68; 12.80; 18.63 t of seeds of 9 species of 11 varieties of perennial grasses in 2016, 2017 and 2018.