Comparative Analysis of Stalk and Fiber Yield in Several Hemp Genotypes

Abstract

Stalk and technical fiber yields was comparatively analyzed for several genotypes of hemp for fiber. Field research, in comparative crops, was carried out under ARDS Lovrin conditions, during 2022 – 2023 agricultural years. Ten hemp genotypes for fiber (Hg_721 to Hg_730) were analyzed, under non-irrigated crop conditions. Stalk yield (SY, kg ha^-1) and technical fiber yield (TFY, kg ha^-1) values ​​were determined. Based on the recorded values, the SY/TFY ratio was calculated. In the case of stalk production, the mean value recorded at the experiment level was = 12477.20 kg ha^-1. In the case of technical fiber yield, the mean value calculated at the experimental level was = 3815.55 kg ha^-1. In the case of the SY parameter, the yield increase was DSY = 45.3 kg ha^-1 (Hg_723) to DSY = 591.8 kg ha^-1 (Hg_723), with statistically significant differences in the case of the genotypes Hg_722, Hg_728 and Hg_730 (p<0.01). Negative differences were recorded in the genotypes Hg_724 (p<0.01) and Hg_729 (p<0.05). In the case of the TFY parameter, the yield increase was DTFY = 111.95 kg ha^-1 (Hg_727) to DTFY = 425.95 kg ha^-1 (Hg_728), with statistically significant differences in the case of the Hg_722 (p<0.05) and Hg_728 (p<0.001) genotypes. Negative differences were recorded for genotypes Hg_723, Hg_724, Hg_725, Hg_726, and Hg_729 at p<0.05 level. The share of technical fiber production (TFY, %), compared to stalk yield (SY) was between TFY = 29.29% in the case of the Hg_723 genotype, and TFY = 32.70% in the case of the Hg_728 genotype. Cluster analysis showed similarity-based association of industrial hemp genotypes, in relation to SY (Coph.corr. = 0.893) and TFY (Coph.corr. = 0.835).