Biosafety of the application of biogenic nanometal powders in husbandry

Abstract

Effects of iron and copper nanopowders (particle size of 20-40 nm) were investigated on rabbits of 1 month age and heifers of 6 months. For introduction of nanometals into the animal's ration, the mixed fodder was treated with the nanometal powder suspension in such a way: 0.08 mg of nanoiron per kg of animal's body weight and 0.04 mg kg −1 for nanocopper. The weight gain of the heifers who received nanoiron and nanocopper after 8 months was 22.4 and 10.7% higher than that of the control, respectively. For the rabbits who received nano Fe and Cu after 3 months, the weight gain was 11.7 and 7.3% compared to the control, respectively. Under the action of metal nanopowders morphological indices of blood were changed in comparison with the control: after 8 months the quantity of erythrocytes increased by 19.6%, hemoglobin by 17.1% and leukocytes by 7.6%. There was a realignment in leukocytic formula: the quantity of lymphocytes increased by 9% compared to the control. Biogenic metals in superdispersive state were able to stimulate immune, enzymatic and humoral systems of the animal's organism, promoting metabolism. Adding Co and Cu metal nanopowders to the bull-calves' fodder rations increased content of Ca by 31.8 and 0%, Fe by 38.8 and 37.5%, K by 19.2 and 15.3%, Mg by 17.6 and 23.5%, Mn by 9.8 and 45% and Na by 20.5 and 8.8%, respectively, compared to control. Metal nanopowders improved the quality indices and meat productivity of black-white bull-calves, expressed in intensive growth of muscle, tissue and more nutritious meat. The conducted veterinary-sanitary expertise showed that the supplements based on iron, cobalt and copper nanopowders can be used as safe bioactive supplements in animal husbandry.

Peculiarities of Mineral Metabolism of Holstein Heifers’ Diet Supplemented with Copper Nanopowders

“…An alternative to traditional forms of micronutrients can be nanopreparations containing metals (iron, cobult and copper) in the form of nanosized particles. The Scientific and Educational Center "Nano-and Biotechnologies" at Ryazan State Agrotechnological University, Russia, is studying the biological activity of metal nanopowders in various agricultural sectors (Polischuk et al, 2015a;Polischuk et al, 2018;Churilov et al, 2019), including the feeding of highly productive animals with the ability to catalyze biochemical processes in the body and increase metabolism (Nazarova et al, 2014;Miroshnikova et al, 2015;Sizova et al, 2016). With this background in mind, The aim of current study was to avaluate the effect of copper nanopowder on the mineral metabolism indicators during growth process of Holstein heifers.…”

Physiological and Biochemical Parameters of Holstein Heifers when Adding to their Diet Bio-Drugs Containing Cuprum and Cobalt Nanoparticles

“…Bio-drugs with Fe, Co, Cu nanoparticles can be such an alternative. The Center of nanotechnologies and nanomaterials for agro-industrial complex (FSBEI HE RSATU) studies biological activity of nanomaterials including nanodispersed metals powders in different areas of agriculture [3,4,5].…”

Physiological and Biochemical Grounding of Different Nanomaterials Use WhenGrowing Corn Seeds

“…The long-term investigations of the Center of Nanotechnologies and Nanomaterials for the RF Agro-Industrial Complex (FSBEI HPE RSATU) have shown that bio-drugs based on different nanomaterials can be alternative to modern drugs and activate biochemical and physiological processes in plants to increase the agricultural crops yield and quality (Kutskir, Nazarova, Polishchuk, 2012, pp. 135-152;Nazarova, Polishchuk, Stepanova, Churilov, 2014;Golubeva, Ivanycheva, Nazarova, Polishchuk, Churilov, 2013;Polishchuk, Nazarova, Zheglova, 2013, pp. 9-12).…”