Air source heat pump (ASHP) is a good new energy heating system. To explore the effect of ASHP on production yellow-feather broiler chicks, 31,500 one-day-old yellow chicks were divided into three chicken houses with same building structure but different methods (ASHP, CCF, CB). During experiment, parameters time, temperature uniformity, gas concentration, weight gain, survival rate and benefit...

The NRC selenium (Se) requirement for broiler chicks is 0.15 μg Se/g diet, based primarily on weight gain and feed intake studies reported in 1986. To determine Se requirements in today's rapidly growing broiler chick, day-old male chicks were fed Se-deficient basal diets supplemented with graded levels of Se (0, 0.025, 0.05, 0.075, 0.1, 0.2, 0.3, 0.5, 0.75, and 1.0 μg Se/g) as Na2SeO3 (5/treat...

Hatchery contamination can result in ingested or inhaled microbes that may modify colonization of the intestinal and respiratory tract, with potential to influence early growth, inflammation, overall health. Six experiments were completed compare chick quality, health between two hatcheries (H1 H2). On embryonic d0, 45 eggs from same breeder flock set at each hatchery. length, abdominal height,...

S OF PAPERS 213 M72 Relationship of Hatch Time to Broiler Chick Percentage Yolk Sac and Subsequent Live Performance John Brake*1, Serdar Ozlu2, Okan Elibol2 1North Carolina State University, Raleigh, NC; 2University of Ankara, Ankara, Turkey Broiler hatching eggs from broiler breeder flocks (Ross 344 X 308SF) at 59 and 55 wk of age were used in Experiments 1 and 2, respectively. Eggs were store...

A Source of Variation in Avian Growth Studies: undigested food.--In studies of avian biology, standardized growth curves are often obtained by weighing young at regular intervals. What is measured, in fact, is the bird plus the unassimilated food in the gut, some of which will be eventually assimilated but some of which will be excreted. Food in the gut is a source of variation in weight studie...

This study consisted of two experiments, conducted to assess the impact of phase at which vegetable protein (VP) diets are introduced to broiler chicks, and preference of birds for diets based on soybean or canola meal (CM). Two hundred and ten day-old Cobb 500 chicks were randomly distributed into five dietary groups in the main experiment. One group was fed on animal protein (AP) diet all thr...

The aim of the performed investigations was to compare eggs of Japanese quail layers of different weights with regard to their shape, selected traits of the content following various times of their storage as well as the results of hatchability and body weight of one-day old chicks. Hatching eggs were divided into four groups: group S – up to 10.50 g, group M – from 10.51 to 11.50 g, group L – ...

Chicken embryos (Gallus domesticus) were injected with 0, 8, 20 or 50 ng tetrachlorodibenzo-p-dioxin (TCDD) per egg at embryonic day (ED) 4, 8 or 12 to investigate the effects of differential periods of sensitivity to TCDD exposure. At hatch, all chicks were weighed, sexed and examined macroscopically to identify possible malformations. Liver, bursa, heart and spleen masses were recorded from a...

The focus of the research was to determine how giant floater (Pyganodon grandis) worked as a feed ingredient in broiler production. A total 120 one-day-old Cobbs 500 were reared for 42 days, regardless sex. chicks weighed and brooded 14 days. distributed at random on fourteenth day four treatments with three replications, each containing ten chicks. They given varied proportions meal ingredient...

Increasing sociopolitical concerns with antibiotic use have led to investigations of potential alternatives for food safety and growth promotion. Direct-fed microbials (DFM) including spore-based probiotics are amenable to feed inclusion and are extremely stable. We isolated several Bacillus spp. from environmental and poultry sources and tested them for their ability to reduce Salmonella in vi...