# Effect of Biostimulants on the Yield and Quality of Selected Herbs
## 3 Results and Discussion
The daily requirement for these ingredients is over 100 mg. The mineral status of plants is important not only for the nutritional value of food, but also for the growth, development, and yielding of crops [1]. Plants are exposed to the influence of adverse environmental factors, which are known as abiotic stresses, excessive soil salinity, and the absence of mineral salts [3]. The concentrations of selected macronutrients in the analyzed herb species are presented in Figure 3. Herb species had a significant effect (Table 3, Figure 3) on total N content (14.4 g kg\({}^{-1}\) DM on average). Summer savory herbage was characterized by the significantly highest total N content (18.5 g kg\({}^{-1}\) DM on average). Maximus Amino Protect had a positive influence on total N levels in the examined herb species, which reached 16.1 g kg\({}^{-1}\) DM on average. However, the observed differences are not statistically significant. The total N content of summer savory treated with Maximus Amino Protect was significantly higher (24.8 g kg\({}^{-1}\) DM) than in the remaining treatments. Lower total N concentrations were noted in lemon balm herbage in all treatments, and in summer savory treated with Calleaf Aminovital. Different total N levels were reported by [PERSON] et al. [35]--2.5-3.8% in summer savory and 2.0-2.6% in marjoram, depending on the cultivation method. [PERSON] and [PERSON] [36] found that the total N content of summer savory herbage ranged from 2.9 to 4.5% DM, depending on fertilization. In the experiment conducted by [PERSON] et al. [3], nitrogen rate and plant growth stage had a significant effect of the total nitrogen content of summer savory var. _Saturn_. Figure 3: Effect of biostimulants on the mineral composition of herbage in the analyzed herb species: a–h—various letters denote significant differences at \(p\) < 0.05 (Tukey’s test); CA—application of Calleaf Aminovital; MAP—application of Maximus Amino Protect. \begin{table}
\begin{tabular}{c c c c c c} \hline \hline
**Factor** & **N-Total** & **P** & **K** & **Mg** & **Ca** \\ \hline Treatment (A) & 0.359 & 0.211 & 0.209 & 0.586 & 0.610 \\ Species (B) & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 \\ Interaction (A \(\times\) B) & \textless{}0.001 & \textless{}0.001 & \textless{}0.001 & 0.057 & \textless{}0.001 \\ \hline \hline \end{tabular}
\end{table} 
Table 3: \(p\)-Value for ANOVA on the mineral composition of herbage in the analyzed herb species. In a study by [PERSON] et al. [35], the P content of herbage ranged from 0.97 to 1.61 g kg\({}^{-1}\) DM in _Satureja fortensis_ L. and from 1.30 to 1.47 g kg\({}^{-1}\) DM in _Origanum majorana_ L. In the present study, the P content of herbage was the lowest in summer savory treated with Maximus Amino Protect (0.97 g kg\({}^{-1}\) DM) and the highest in lemon balm in the control treatment (1.98 g kg\({}^{-1}\) DM). The average K content of herbage ranged from 1.51 g kg\({}^{-1}\) DM in lemon balm to 2.76 g kg\({}^{-1}\) DM in summer savory. An analysis of the interaction between the experimental factors revealed that summer savory treated with Maximus Amino Protect was characterized by the significantly highest K content, whereas K concentrations were lower in lemon balm herbage in all treatments. [PERSON] et al. [35] demonstrated that the levels of this macronutrient varied across species and reached 2.4-4.1% in summer savory and 1.6-2.7% in marjoram. According to [PERSON] and [PERSON] [37], the content of Mg and Ca in lemon balm, thyme, and cyenne pepper is lower than that in basil. In the present study, differences were found in Mg content between the analyzed herb species, and it was higher in lemon balm than in summer savory and marjoram. Similar results were reported by [PERSON] and [PERSON] [10; 36] for marjoram (0.15-0.31% DM) and summer savory herbage (0.32% DM to 0.46% DM).