Dried Laminaria thalli extract for stimulating germination and digestibility of oats and buckwheat

Abstract

Despite their beneficial properties, cereal crops contain a number of antinutritive substances, the amount of which can be reduced by germination. In this work, we test the hypothesis about the possibility of stimulating the germination of cereal crops (on the example of oats and buckwheat) and increasing their digestibility using a dried Laminaria thalli extract. The research was conducted using hulless oats (Avena nudisativa) for germination and hulled buckwheat grain (Fagopyrum esculentum), as well as dried Laminaria thalli. Germination was carried out at a temperature of (20±2) °C for 120 h, using drinking water (control) and drinking water with addition of 1 wt% of dried kelp thalli. The germination intensity was assessed based on the mass of 1000 grains, sprout length, and the number of germinated grains. In all samples, the mass fraction of extractive substances and dry matter digestibility with modifications were determined. It was found that the addition of dried Laminaria thalli to water in the amount of 1 wt% stimulates the germination of oats and buckwheat, as well as their digestibility, significantly. The experimental samples demonstrated an improved water absorption and an increase in the weight of 1000 grains, sprout length, and the number of germinated grains. The use of dried Laminaria thalli extract in germination of oats and buckwheat for food purposes reduces the technological process up to two days with a simultaneous increase in digestibility and minimization of losses of extractive substances.