ASH CONTENT IN SEEDS OF SOME INDUSTRIAL HEMP GENOTYPES

The study analyzed the ash content in the seeds of several hemp genotypes for fiber. The experiment took place within ARDS Lovrin. The biological material was represented by six genotypes of hemp for fiber (FHG), noted in the study FHG1 to FHG6. The seeds were harvested at physiological maturity. From the seed samples of each genotype, laboratory samples were taken to determine the ash content (Ash, %). Ash was determined by calcination (Nabertherm B180 calcination furnace) at 550 °C for 5 hours. The ash content, average values, varied between 3.30±0.33% (FHG1) and 7.05±0.33% (FHG4). The data series for the ash content, average values, presented a normal distribution, according to r = 0.966. Differences between genotypes were registered, under statistical safety conditions at the level of p<0.05 (*) in the case of the FHG4 genotype compared to the FHG6 genotype, and at the level of p<0.001 (***) in the case of the other genotypes. An exception was registered in the case of FHG3 and FHG5 genotypes, where the differences did not show statistical certainty (p = 1.000). In relation to the average at the level of the experiment (Ash_m = 5.07%), positive differences were presented by the genotype FHG4 DAsh = 1.98%, and the genotype FHG6 DAsh = 1.53%. The cluster analysis facilitated obtaining the dendrogram in which the hemp genotypes were associated based on similarity, in relation to the ash content values ​​(Coph.corr. = 0.868). A cluster included genotypes FHG4 and FHG6, which recorded ash content values ​​above the average of the experiment, with the SDI level = 0.450.