Nutritional value of the grain of Kunitz-free soybean cultivars

Abstract

Utilization of the raw beans for food and feed is prohibited by the presence of protease inhibitors. Breeding soybean cultivars for reduced amount of anti nutritional factors at Maize Research Institute Zemun Polje resulted in development of two new Kunitz-free cultivars - Lana and Laura. Feeding trials with pigs in different growth stages were conducted to compare the response of growing and finishing pigs to diets containing either raw or extruded standard and KTI-free (Kunitz trypsin inhibitor-free) soybean cultivars. The greatest improvement in growth performance was noted for the group fed extruded KTIfree soybean. This group achieved highest daily weight gain and gain per feed unit. Growth parameters for group of pigs fed raw soybean Kunitz-free cultivar were slightly reduced.

Upotreba zrnastih mahunarki u sirovom stanju u ishrani ljudi i domaćih životinja ograničena je prisustvom inhibitora proteaza u zrnu. Oplemenjivanje soje na smanjen sadržaj antihranljivih materija u Institutu za kukuruz Zemun Polje rezultiralo je stvaranjem dve nove sorte soje bez Kunitz tripsin inhibitora - Lana i Laura. U cilju upoređivanja efekata ishrane koja sadrži sirovo ili ekstrudirano zrno soje standardnog kvaliteta zrna i soje bez Kunitz tripsin inhibitora, postavljeni su ishranbeni ogledi sa svinjama u različitim fazama tova. Najveći napredak u pogledu brzine porasta je ostvaren kod grupe hranjene ekstrudiranim zrnom soje bez Kunitz tripsin inhibitora. Ova grupa postigla je najveće vrednosti prosečnog dnevnog porasta i porasta po jedinici konzumiranog hraniva. Parametri rasta kod grupe svinja hranjene sirovim zrnom soje bez Kunitz tripsin inhibitora bili su blago umanjeni u odnosu na ostale ispitivane grupe.