Effect of feeding of chelated zinc form on security, productivity and slaughter parameters of broilers

Abstract

The results of the effect of feeding the chelated form of Zinc on the safety, productivity and slaughter parameters of broiler chickens are presented.
 The aim of this study was to determine the safety, productivity and slaughter parameters of broilers on the background of feeding chelated form of Zinc.
 Materials and methods. Experimental studies were conducted during 2020 on broiler chickens cross Cobb-500 in the vivarium of the Veterinary Faculty of Sumy National Agrarian University (Ukraine), divided into two groups on the principle of analogues (control and experimental) of 50 broilers each. The source of zinc for chickens in the control group was their sulfates. Chelated forms of Zinc were used for broiler chickens of the experimental group. All groups of broiler chickens were administered the compound with compound feed in a dose that corresponded to the daily requirement of the bird in this trace element. The duration of the experiment is 42 days. The growth and development of broilers were evaluated on the basis of determining the relevant zootechnical indicators. Live weight of birds was determined by individual weighing on scales of the VNC type with an accuracy of ±1 g at the age of 7, 14, 21, 28, 35 and 42 days. Both scientific and economic experiments also determined the preservation of livestock - daily by the number of culled and dead birds. Feed consumption was recorded daily, for each week of cultivation and for the entire period of the experiment. At the end of the experiment, the cost of feed per 1 kg of live gained weight was calculated.
 Results. According to the results of the conducted researches, it was established that feeding of the chelated form of Zinc probably increased both the average daily gain and the total live weight of broiler chickens at different age periods of rearing. The live weight of chickens at the beginning of the experiment was almost the same, but at 7 days of age it tended to increase in chickens of the experimental group, although a significant difference between groups in this indicator was not found. It was found that the weight of uneviscerated, semi-eviscerated and eviscerated chicken in poultry of the experimental group was greater than similar indicators in the young animals of the control group by 9.3, 9.2, and 9.8 %, and this difference was significant (p<0.01). The yield of semi-eviscerated carcasses was higher in ones of the experimental group (84.19 %), and the difference was significant (p<0.05).
 Conclusions. It was found that the live weight of chickens of the experimental group (consumption of feed with a chelated form of Zinc) prevailed at 7 days of age by 1.1 g; on the 14th day – on 22.1 g (p<0.01); at 21 days – 35.4 g (p<0.01); at 28 days – 94.5 g (p<0.05); at 35 days – 133.6 g (p<0.01); at 42 days – at 218.9 g (p<0.05). Preservation of young animals in the experimental group, which used chelated compounds of Zinc, was higher and amounted to 96 %, compared with the control – 92 %. By age, feed costs per unit weight gain were lower in the experiment, respectively: 0.05; 0.08; 0.12; 0.06; 0.07 and 0.05 kg, compared to the control group. Growing broiler chickens on compound feed with a chelated form of Zinc by 9.8 % (p<0.01) increases the weight of the eviscerated carcass.

Effect of additives with chelated forms of trace minerals on growth performance of broiler chickens, feed nutrient digestibility, and carcass characteristics

“…The live weight of broiler chickens on day 8 in all three groups was almost the same at 230.2-239.5 g. Over the next week, after the introduction of the additives under study into the diet, the poultry began to grow more intensively and in the second group the live weight of chickens was 97% higher (at p<0.001), in the third group -by 10.5%. The absolute increase in live weight during the period of feeding the starter feed (days [3][4][5][6][7][8][9][10][11][12][13][14][15] was 11.7% higher in the second group (p<0.01), and 12.7% higher in the third group (p<0.001) compared to the data in the control group. The relative increase in live weight, which characterises the growth rate, during this period of poultry rearing with the introduction of the additive "Kronocid-L" to the diet is 3.3 p.p.…”

Changes in the chemical composition of broiler meat when chelated compounds are added to the diet

“…Considering its dominant degree of oxidation, Zinc (Zn) (Gomathi et al, 2018) is an integral part of several biochemical pathways as a catalytic or regulatory co-factor. It also has a structural role in many other functional proteins (Fotina et al, 2021). (Mn) plays an essential role in various biological processes, being a significant co-factor of superoxide dismutase, transferase, hydrolase, and lyase (Bai et al, 2014;Xiao et al, 2014).…”

“…In research, scientists have found that the use of chelated compounds of Zinc, Copper, and Manganese, as a feed additive, stimulates an increase in the overall natural resistance of broilers, accompanied by an increase of 7.4 % bactericidal activity, 8.3 % phagocytic activity, and 6,6 % of lysozyme activity. In this regard, chelated elements should be used in industrial poultry, as they can be used as a potent immunostimulant that provides good quality products without antibiotics (Fotina et al, 2021).…”

“…Experiments have shown that using chelated compounds of Zinc, Copper, and Manganese increased the hatchability of chickens by 1.92 %, increased egg production by 5.8 %, and reduced feed conversion by almost 6 %. An increase in the ash level in the dry matter of day-old chicken bones by 4.3 % indicates an improvement in the skeletal structure of the offspring of the group where chelated compounds were used (Fotina et al, 2021).…”

Study of the efficiency of using biogenic metals for feeding calves

“…Zinc is found in several metalloenzymes such as RNA polymerase, carbonic anhydrase, and several others that affect nutrient metabolism. Zinc absorption mainly occurs in the small intestine [6]. The Zn requirement for a growing heifer is 200-300 mg and 22.8 mg/kg of ration.…”