B.D. LOTT
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View article: Hatchery Feeding of Starter Diets to Broiler Chicks
Hatchery Feeding of Starter Diets to Broiler Chicks Open
This study examined hatchery feeding of starter diets differing in amino acid density and moisture on live performance measurements up to 37 d and processing measurements at 38 d. Eggs from a Cobb × Cobb 500 slow-feathering cross broiler s…
View article: Stocking Density and Physiological Adaptive Responses of Broilers
Stocking Density and Physiological Adaptive Responses of Broilers Open
Three trials were conducted to assess the effects of stocking density on physiological adaptive responses of broilers. Male broilers were reared in floor pens under conditions similar to those used commercially in the United States. Accept…
View article: Live performance of male broilers subjected to constant or increasing air velocities at moderate temperatures with a high dew point
Live performance of male broilers subjected to constant or increasing air velocities at moderate temperatures with a high dew point Open
This study examined the effects of varying air velocities vs. a constant air velocity with a cyclic temperature curve of 25-30-25 degrees C and a dew point of 23 degrees C on broilers from 28 to 49 d of age. Four replicate trials were cond…
View article: Stocking density effects on growth performance and processing yields of heavy broilers
Stocking density effects on growth performance and processing yields of heavy broilers Open
This study examined responses of male broilers during a 49-d production cycle to 4 placement densities in 2 trials. Trials were pooled because no treatment x trial interaction occurred. In each trial, 1,488 male chicks were randomly placed…
View article: Growth responses of male broilers subjected to increasing air velocities at high ambient temperatures and a high dew point
Growth responses of male broilers subjected to increasing air velocities at high ambient temperatures and a high dew point Open
This study examined live performance responses of male broilers to increasing air velocity of 120 and 180 m/min reared under high cyclic temperatures (25-35-25 degrees C) with a 23 degrees C dew point from 21 to 49 d. Birds were reared in …
View article: Atmospheric Ammonia is Detrimental to the Performance of Modern Commercial Broilers
Atmospheric Ammonia is Detrimental to the Performance of Modern Commercial Broilers Open
Atmospheric ammonia inhibits broiler performance. Quantified effects are based on older genetic stock with a BW of 2000 g at 7 wk. In contrast, modern genetic stock reaches 3200 g at 7 wk of age. To assess the impact on present day broiler…
View article: Development of a Water Stick to Measure Nipple Waterer Flow Rates
Development of a Water Stick to Measure Nipple Waterer Flow Rates Open
Inadequate drinking water supplies have been cited as a major reason for poor weight gain in broiler production. One of the limiting factors is nipple waterer flow rate. Research demonstrated a constant water flow rate of 25 mL/min impeded…
View article: Rearing Temperature Is Inconsequential to Broiler Phosphorus Excretion
Rearing Temperature Is Inconsequential to Broiler Phosphorus Excretion Open
A feeding trial was conducted to determine the influence of rearing temperature on P excretion by male broilers. Experimental diets were formulated with three levels of dietary available P (aP): control at 0.38% aP, control less 20% or 0.3…
View article: Total and water-soluble phosphorus in broiler litter over three flocks with alum litter treatment and dietary inclusion of high available phosphorus corn and phytase supplementation
Total and water-soluble phosphorus in broiler litter over three flocks with alum litter treatment and dietary inclusion of high available phosphorus corn and phytase supplementation Open
Three pen trials were conducted to determine the main effect of alum addition to litter on form of poultry litter P using a 2 x 2 factorial structure of the subunit treatments: diets including high available phosphorus/low phytate corn (HA…
View article: The effects of high-air velocity on broiler performance
The effects of high-air velocity on broiler performance Open
Two trials using a total of 1,484 Ross male broilers were conducted to study the effect of air velocities of 180 and 120 m/min versus still air (<15 m/min) on BW gain (BWG) and feed:gain from 3 to 7 wk of age. Broilers were raised in a com…
View article: Effects of F-strain Mycoplasma gallisepticum inoculation at twelve weeks of age on performance and egg characteristics of commercial egg-laying hens
Effects of F-strain Mycoplasma gallisepticum inoculation at twelve weeks of age on performance and egg characteristics of commercial egg-laying hens Open
The effects of F-strain Mycoplasma gallisepticum (FMG) inoculation during the pullet period on the subsequent performance and egg characteristics of commercial Single Combed White Leghorn hens were evaluated. In two trials, BW, feed consum…
View article: Chick Mortality Associated with Elevated Water Lines and Consumption of Wet Litter
Chick Mortality Associated with Elevated Water Lines and Consumption of Wet Litter Open
In a nipple waterer study, 55 (6.11%) of 900 total chicks were found dead the day after placement with another 25 to 30 chicks alive but in apparent respiratory distress. Examination of temperature and humidity records revealed no aberrati…
View article: Relating Weight Gain and Feed:Gain of Male and Female Broilers to Rearing Temperature
Relating Weight Gain and Feed:Gain of Male and Female Broilers to Rearing Temperature Open
The effects of environmental temperature on growth and feed:gain were studied in three trials each for male and female broilers. Chicks were reared in a common environment to 21 d of age. At 21 d, they were randomly allocated to 10 environ…
View article: The Effect of Nipple Height on Broiler Performance
The Effect of Nipple Height on Broiler Performance Open
Two trials, using a total of 3,200 male broilers, were conducted to compare the effects of a trough drinker versus three different heights on a nipple drinker system on body weight gain and feed:gain. The broilers were housed in temperatur…
View article: The effect of air velocity on broiler performance and feed and water consumption
The effect of air velocity on broiler performance and feed and water consumption Open
Two trials were conducted to determine the effect of air velocity on feed and water consumption at a constant temperature of 27 C and a daily cyclic temperature of 22-32-22 C. Air velocity over the broilers was <15 or 120 m/min. These temp…
View article: The effect of environmental temperature on growth and feed conversion of broilers to 21 days of age
The effect of environmental temperature on growth and feed conversion of broilers to 21 days of age Open
Temperature during rearing is a major factor in production efficiency for broilers. The objective of this research was to determine the effect of five temperature regimens on the growth, feed conversion, and mortality of broilers to 21 d o…
View article: The effect of environmental temperature and body weight on growth rate and feed:gain of male broilers
The effect of environmental temperature and body weight on growth rate and feed:gain of male broilers Open
High environmental temperatures are detrimental to the growth and feed:gain of broilers. The objective of this research was to determine the effects of incremental differences in environmental temperature on growth and feed:gain. The data …
View article: Air velocity and high temperature effects on broiler performance
Air velocity and high temperature effects on broiler performance Open
Three trials, using a total of 1,320 male broilers, were conducted to study the effect of air velocity at 125 m/min on body weight gain and feed: gain. The broilers were placed on litter in pens in a wind tunnel or on litter in floor pens …
View article: Dietary Lysine and Ascites Incidence
Dietary Lysine and Ascites Incidence Open
Two trials were conducted with male broilers to determine the effect of dietary lysine on deaths due to ascites. Starter diets contained 1.13, 1.20, 1.28, and 1.35% dietary lysine; grower diets contained 1.02, 1.09, 1.16, and 1.23% lysine.…
View article: Water consumption by broilers in high cyclic temperatures: bell versus nipple waterers
Water consumption by broilers in high cyclic temperatures: bell versus nipple waterers Open
Broilers were maintained on litter in environmental chambers to study water consumption from bell and nipple waterers. The chambers were set at high cyclic temperatures of either 24-35-24 C or 24-32-24 C daily cycles in three trials. Water…
View article: The effect of added complex carbohydrates or added dietary fiber on necrotic enteritis lesions in broiler chickens
The effect of added complex carbohydrates or added dietary fiber on necrotic enteritis lesions in broiler chickens Open
Two trials utilizing two corn diets and four wheat diets were conducted. In Trial 2, all chicks were crop-infused at 9 d of age with Eimeria acervulina. In both trials, a broth culture of Clostridium perfringens was mixed with the diets fo…
View article: The Effect of Brooding Temperature on Broiler Performance
The Effect of Brooding Temperature on Broiler Performance Open
In response to the energy crisis of the 1970s, this laboratory recommended that initial brooding temperatures for broilers be reduced to 29.4 C from 32.2 or 35 C. Because environmental temperature has been implicated in the ascites syndrom…
View article: The Effects of Nonautoclaved and Autoclaved Water-Soluble Wheat Extracts on the Growth of Clostridium perfringens
The Effects of Nonautoclaved and Autoclaved Water-Soluble Wheat Extracts on the Growth of Clostridium perfringens Open
Clostridium perfringens is the causative agent of necrotic enteritis, a commonly diagnosed disease in chickens that is also observed in turkeys and geese. Two trials were conducted to determine the in vitro effect of filter-sterilized, wat…
View article: Corn Grind Size and Broilers Reared Under Two Temperature Conditions
Corn Grind Size and Broilers Reared Under Two Temperature Conditions Open
Two trials were conducted to determine whether corn ground through a 9.53-mm hammermill screen and fed to broilers would produce the same performance as broilers fed diets containing corn ground through 6.35-mm and 3.18-mm hammermill scree…
View article: Effects of Light and Temperature on Anticipatory Feeding by Broilers
Effects of Light and Temperature on Anticipatory Feeding by Broilers Open
The objective of this research was to determine the effects of daily cycles of light intensity and temperature on anticipatory feeding by broilers. Broilers were maintained on litter in environmental chambers with feed provided for 12 h/d.…
View article: Automatic Fan Control to Reduce Fan Run Time During Warm Weather Ventilation
Automatic Fan Control to Reduce Fan Run Time During Warm Weather Ventilation Open
Every summer in the southeastern U.S., many broilers die from heat stress due to a combination of high temperature and high humidity. Managers tend to ventilate open-sided broiler houses during summer primarily with large fans that use a l…
View article: The Effect of Oxytetracycline on Water Consumption of Broilers
The Effect of Oxytetracycline on Water Consumption of Broilers Open
Two hundred forty male broilers, 22 days of age, were divided into twelve groups of twenty birds each to study the effect of two different formulations of oxytetracycline (OXY-1 and OXY-2) in the drinking water on fluid consumption. Tap wa…
View article: Effect of Periodic Feeding and Photoperiod on Anticipation of Feed Withdrawal
Effect of Periodic Feeding and Photoperiod on Anticipation of Feed Withdrawal Open
Broiler chicks obtained from a commercial hatchery were reared on litter in environmental chambers. The rearing temperature was 32 C initially, and reduced 2,8 C/wk until 24 C was reached. Water was available for ad libitum intake. The tre…
View article: The Effect of Temperature, Dietary Energy Level, and Corn Particle Size on Broiler Performance
The Effect of Temperature, Dietary Energy Level, and Corn Particle Size on Broiler Performance Open
Experiments were conducted to study the effect on broiler performance of grinding corn with different hammer mill screen openings (HMSO). Corn for Trials 1 and 2 was ground through HMSO of 3.18 or 9.59 mm and broilers were grown at 15.5 an…