Application of methionine-containing complexes and their composites with clinoptilolite in poultry nutrition

A premix and its composite with clinoptilolite were prepared to study physiological activity of chelate compounds and natural zeolite -clinoptilolite, which was used to balance formula feed for poultry layers. Experiment lasted 60 days on three groups: control group was given a feed used generally at the factory, I experimental group was given a feed balanced by premix prepared on the base of biometals (Mn, Zn, Fe, Co, Ca, Mg, Cu) and chelate compounds of sulfur-containing amino acid, methionine, while that of the II experimental group - by clinoptilolite and the same formulation premix composite. Observations were made over poultry development, egg-laying intensity and physical properties of eggs (egg yolk, white, shell mass et al). The role of amino acids, namely methionine, on the one hand, and that of biometals, on the other hand, is known in poultry and animal nutrition. Therefore, simultaneous presence of methionine and biometals in chelate form should provide sharp increase of their biological activity, decrease of toxicity and high grade of assimilation. It was proved by analysis of the obtained data. In particular, researches showed that live mass increase in the I group reached 6.7%, in the II group – 7.33%, while in the control one – 5.13%. Poultry preservation index in the I group equaled to 93.75%, in the II group – 95.06, while in the control -81.3%. Productivity of layers, egg-laying capacity and egg quality and physical characteristics (egg mass, egg length, width, white mass, yolk mass, shell mess and others) were increased. The obtained results are conditioned by biometals in chelate form (I exp. group) and simultaneous presence of these chelate forms and clinoptilolite (II exp. group), which provided better assimilation of biometals and improvement of metabolism in experimental poultry.