Czech Journal of Animal Science, 2023 (vol. 68), issue 4
Recent advances of using organic acids and essential oils as in-feed antibiotic alternative in poultry feedsReview
Nguyen Hoang Qui
Czech J. Anim. Sci., 2023, 68(4):141-160 | DOI: 10.17221/99/2022-CJAS 
Antibiotics used in animal feeds have recently been strictly regulated to avoid antibiotic resistance in humans. Thus, scientists are compelled to find new feed additives to replace antibiotics in feed. Apart from having a zero effect on human health, new alternatives may even be able to further improve production performance. Essential oils (EOs) and organic acids (OAs) stood out as powerful and useful replacements for both animal production and human population. These are added to chicken diets and drinking water to induce a favourable growth response. Hence, enhancing the nutrient digestibility, performance, and immunity of birds, OAs and...
The influence of eating and rumination time on solids content in milk and milk yield performance of cowsOriginal Paper
Radim Codl, Jaromír Ducháček, Mojmír Vacek, Jan Pytlík, Luděk Stádník, Marek Vrhel
Czech J. Anim. Sci., 2023, 68(4):161-168 | DOI: 10.17221/228/2022-CJAS
The aim of this study was to evaluate the effect of rumination time, eating time and season on milk yield and on milk component content in the context of milk recording. The experiment was carried out with two breeds – Czech Fleckvieh cattle and Holstein cattle – for one year. Vitalimetr 5P neck responders were used to monitor eating and rumination time. For statistical evaluation, the time of eating and rumination was divided into three groups according to the length of eating and ruminating, with each breed being categorised separately. The highest protein content, which was 3.6%, was calculated for the group with an average eating...
Laying hen performance, feed economy, egg quality and yolk fatty acid profiles from laying hens fed live black soldier fly larvaeOriginal Paper
Kanda Lokaewmanee, Samonporn Suttibak, Rathanit Sukthanapirat, Ramin Sriyoha, Napapat Chanasakhatana, Somchai Baotong, Unchan Trithalen
Czech J. Anim. Sci., 2023, 68(4):169-177 | DOI: 10.17221/174/2022-CJAS
The black soldier fly (Hermetia illucens) serves as an alternative source of protein in poultry production. However, there is little available information on feeding live black soldier fly larvae (LBSFL) to hens. The present study filled this gap by testing the effect of dietary LBSFL on laying hen performance, feed economy, egg quality, and yolk fatty acid composition. In total, one hundred forty-four 25-week-old Charoen Pokphand Brown laying hens were assigned to four groups. Experimental birds were provided a basal diet supplemented with 0.0 (T1), 10.0 (T2), 20.0 (T3), or 30.0 (T4) g/kg LBSFL. Our results indicated that no effects on...
Studies on the growth, immunomodulation and gut morphometry of Labeo rohita fed pectinOriginal Paper
Humaira Sehrish Hashmi, Noor Khan, Khalid Javed Iqbal, Mahroze Fatima, Khalid Mahmood Anjum, Sumaira Abbas, Muhammad Awais, Sadia Nazir, Muhammad Asghar, Mahanama De Zoysa
Czech J. Anim. Sci., 2023, 68(4):178-187 | DOI: 10.17221/132/2022-CJAS
The present study was designed to evaluate the effect of pectin supplemented feeds on the growth, gut morphology and immunology of Labeo rohita. Experimental feeds containing various concentrations of pectin including control (0%), T1 (0.5%), T2 (1.0%), T3 (2.0%), and T4 (4.0%) were administered to L. rohita twice per day at a rate of 3% body weight. There was a significant (P < 0.05) decrease in average final weight, weight gain%, net weight gain and specific growth rate observed in treatment groups in order of control > T1 > T2 > T3 > T4 while feed conversion ratio was significantly (P < 0.05) higher...