USING BBCH SCALE AND GROWING DEGREE DAYS TO IDENTIFY THE GROWTH STAGES OF WINTER OILSEED RAPE GENOTYPES IN THE SKOPJE REGION

  • Igor Iljovski
  • Ile Canev
  • Daniela Todevska
  • Zlatko Arsov

Abstract

Identifying the growth stages on oilseed rape accurately is essential for effective crop management. Two commonly used methods for identifying growth stages are growing degree days (GDD) and BBCH scale, by measuring the heat accumulation on daily temperatures and describes the growth stages of plants. The main goal of this research is using a combination of these methods, where can identify the growth stages in production period. The three-year field experiments 2015/16 - 2017/18 were located in the Skopje Region, with two genotypes in 30 variants and 4 replications. Sowing was on October 1, with 8 kg ha-1 seeding rate. BBCH scale for oilseed rape was used to register the stages of development. Growing degree days - GDD were determined by the formula with corrections for Tmax and Tmin values calculated. Germination (09 BBCH), was 7 days in the first and third year and 79 0C - 65 0C GDD and 8 days in the second year - 65 0C GDD. The flowering (63 BBCH), begins at 202 days in the first, - 809 0C GDD, 199 days in the second year – 649 0C GDD, and 198 days third year with 633 0C GDD. Senescence (BBCH 97), began on days 254, with accumulate 1530 0C GDD, days 258 – 1577 0C GDD, and days 265 with 1542 0C GDD in 3, 1 and 2 years. All data obtained from the research are aimed at meeting the needs of producers and researchers related to rapeseed production in order to ensure optimal production.

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Published
2023-08-10