The effect of growth regulator Tytanit dose on Medicago x varia T. Martin and Trifolium pratense L. yield and nutritional value

The aim of the research was to evaluate the effect of foliar application of different doses of Tytanit as a biostimulant on the yield and nutritional value of Medicago × varia T. Martin and Trifolium pratense L. It was assumed that titanium application during any life cycle of alfalfa hybrid and red clover would contribute to their growth, digestibility, and total protein content. In addition, it was expected that increasing doses of Tytanit up to 0.6 dm³ ha⁻¹ would improve the yield and quality of forage plants. Different doses of Tytanit in different ways affected the yield. However, the largest dose of 0.6 dm³ turned out to be the most effective. It contributed to a 38% increase in the yield of hybrid alfalfa and to a 31% increase in the red clover yield. Individual doses of Tytanit in different ways affected accumulation of protein and crude fibre in the dry matter. Used at 0.4 and 0.6 dm³ doses it increased the amounts of protein and crude fibre relative to control. The smallest dose had no significant effect on these parameters. Tytanit did not improve dry matter digestibility, and there was no statistically significant variation as a result of its application. Foliar application of the biostimulant resulted in an increase in the concentration of phosphorus, potassium, and magnesium in plant dry matter. High content of calcium in the plant species before Tytanit application increased further as a response to 0.2 and 0.4 dm³ doses, with a slight increase in the ratio of K: (Ca + Mg) and an excessive growth of the Ca: P ratio, which reduced hybrid alfalfa and red clover nutritional values. Thus, Tytanit doses used in the experiment significantly increased hybrid alfalfa and red clover yields, but the nutritional value of the plants did not improve.