Effect of Attractants and Micronutrient Biofortification on the Yield and Quality of Red Clover (Trifolium pratense L.) Seeds

Abstract

The aim of the research was to develop an innovative technique in the seed production of red clover. The research was carried out in 2013–2016, in Felin (51°22′ N, 22°65′ E), in a dependent arrangement (split-split-plot) in four replications. The first order factor was the use of an attractant: (1) control object, with pure water spraying, (2) attractant used in the 60 BBCH phase, (3) attractant applied twice—in the 60 and 65 phase, in the BBCH scale. The factor of the second order was fertilization: (a) standard object with PK fertilization; (b) fertilization with microelements (B + Mo) against the background of constant PK fertilization. The use of attractant ‘Pollinus’ preparation in the cultivation of red clover, both once and twice, in the form of spraying on plants, contributed to an increase in the seed yield, number of heads, share of seeds in the head, thousand seeds weight, and seed germination capacity, compared to the control object. Elements of the red clover yield structure achieved more favorable values with foliar feeding (B + Mo) compared to the standard one. Under the influence of plant biofortification with boron and molybdenum, the number of seeds infected with fungal pathogens and abnormally germinating decreased.