Effect of the Feed Additive Clinoptilolite (ZeoFeed) on Nutrient Metabolism and Production Performance of Laying Hens
The study conducted by Miroslav Macháček and colleagues aimed to evaluate the impact of two levels of clinoptilolite (2% and 4%) on the performance, nutrient metabolism, and health of laying hens. A total of 24 Bovans Goldline hybrid laying hens were divided into three groups: two experimental groups (E1 with 2% clinoptilolite and E2 with 4% clinoptilolite) and one control group (C). The hens were housed in controlled environments and fed a complete feed mix, with clinoptilolite replacing an equivalent amount of wheat.
Over a 28-day period, the researchers monitored feed consumption, egg production, and egg weight. The results indicated that the addition of 2% clinoptilolite significantly increased the mean egg weight to 64.69 g, while the 4% addition led to a decrease in egg weight to 62.20 g. Daily feed consumption decreased in the E1 group but increased in the E2 group compared to controls. The metabolic utilization of nutrients such as fat, nitrogen-free extracts, and gross energy was slightly improved in the E1 group, while the E2 group showed a negative impact on most indicators.
Haematological tests revealed significant differences in haemoglobin levels, with lower values in the E2 group. Biochemical analyses showed no significant differences in plasma composition among groups, although lower concentrations of total protein, cholesterol, and triacylglycerols were noted in the experimental groups. The study concluded that a 2% level of clinoptilolite is optimal for improving nutrient metabolism and production performance in laying hens, while higher concentrations may adversely affect health and performance.
This research paper is significant in the field of animal nutrition, particularly in poultry management, as it provides empirical evidence on the effects of clinoptilolite as a feed additive. The findings contribute to ongoing discussions about optimizing feed formulations to enhance production performance while ensuring animal health. By identifying the optimal level of clinoptilolite, the study offers practical insights for poultry farmers seeking to improve egg production and nutrient utilization. Additionally, the research highlights the potential risks associated with higher concentrations of feed additives, which is crucial for developing safe feeding practices.
