QUALITY ASSESMENT OF SEEDS OFFERED ON THE POLISH MARKET AND EFFECT OF SEED VIGOUR ON ROOT YIELD OF SUGAR BEET

摘要

Presented results concerning 2 groups of research a) on quality assessmentof seeds belonging to 2 Polish and 5 foreign companies, offered on Polish marketbetween 2011–2013, b) on the effect of seed vigour on yield of beet roots.This research was conducted between 2007–2013. The seeds of 58 sugar beetvarieties offered on the Polish market differed in vigour level among companies,among varieties within a single company, and years of sale. The magnitude ofplant emergence in a phytotron 12 days after seed sowing time, in compost soil(temperature 10oC and moisture content 60% Fresh Water Content fluctuatedfrom 13.3 to 83.4% depending on the seed company. The speed of one plant emergenceestimated at the end of the emergence period oscillated from 11.43–14.25days. According to the regression equation each 1% increment in a phytotron,emergence increased the yield of roots by 0.247 t·ha -1. Low vigour ofseeds belonging to 5 companies decreased the potential yield by 5.3 to 17.2 t·ha-1in relation to seeds of the 2 best seed companies. Each seed company is ableto offer seeds of the best quality on the Polish market. Sales of low qualityseeds is determined by the general sale policy of seed companies and methodsof Polish market treatment in comparison to another national seed market.