THE EFFECT OF INTERMITTENT FEEDING AND NUTRITIONAL SUPPLEMENTING MICROELEMENTS (CHROMIUM, ZINC) AND VITAMINS (C, E) ON THE PRODUCTIVITY OF BROILER CHICKENS GROWN UNDER HIGH AIR TEMPERATURE CONDITIONS

2019 ◽  
Vol 14 (6) ◽  
pp. 983-991 ◽  
Author(s):  
Abdelhameed Salah Mohamed ◽  
◽  
Aleksandr Lozovskiy ◽  
Keyword(s):  
Air Temperature ◽  
Broiler Chickens ◽  
Intermittent Feeding ◽  
Temperature Conditions

The influence of diets with dry corn barda and intermittent feeding mode on the productive and biological traits of broiler chickens

2020 ◽  
pp. 54-69
Author(s):  
L. Robertovich ◽  
Abdelhamid Salah Abdelhamid Mohamed
Keyword(s):  
Trace Elements ◽  
Air Temperature ◽  
Broiler Chickens ◽  
Arid Climate ◽  
Biological Traits ◽  
Biological Parameters ◽  
Feeding Mode ◽  
Intermittent Feeding ◽  
Hot Arid Climate ◽  
Different Doses

The inclusion of dry corn barda in diets helps to solve the problem of obtaining inexpensive feed protein for broilers, but the effectiveness of its use in different doses has not been studied good enough. The use of different intermittent feeding programs, as of a intermittent feeding mode can reduce the severity of heat stress in broiler chickens. However, the optimal duration of the break in feeding broiler chickens in the hottest daytime hours is not established in detail. The purpose of the researches was to determine the effect of diets with dry corn barda and intermittent feeding mode with the addition of the complex of trace elements (chromium, zinc) and vitamins (ascorbic acid, antisterility vitamin) on the productive and biological characteristics of broiler chickens at high air temperature in the hot arid climate. The productive and biological trats of broiler chickens have been determined when using 5, 10, 15 % dry corn barda in diets. Data on the productive and biological parameters of broiler chickens of the cross Ross-308 have been obtained when using intermittent feeding mode of different duration (2, 3, 4 hours). New data have been obtained on the productive and biological parameters of broiler chickens cross Ross-308 when using additives in feed of different doses of trace elements (Cr, Zn) and vitamins (C, E). The optimal parameters of the duration of intermittent feeding mode and the dose of trace elements (Cr, Zn) and vitamins (C, E) added to the feed have been revealed. It has been found that the inclusion of dry corn barda in the diet of broiler chickens and the influence of intermittent feeding mode with the addition of the complex of trace elements (Cr, Zn) and vitamins (C, E) in the feed improves the functional state of the body and increases the productivity of broiler chickens at elevated air temperature in the hot arid climate.

Studies on the storage of potatoes II. The temperature conditions inside potato clamps

1950 ◽  
Vol 40 (3) ◽  
pp. 199-226 ◽  
Author(s):  
E. M. Crook ◽  
D. J. Watson
Keyword(s):  
Air Temperature ◽  
Heat Production ◽  
First Year ◽  
Temperature Conditions ◽  
Mean Temperature ◽  
The Difference ◽  
Made In

Continuous records of the temperature of potatoes stored in clamps were made in 1942–3 (one clamp) and in 1943–4 (three clamps). In the first year, the temperatures at various positions in the clamp coverings were also recorded.The temperature at the middle of the potato heap showed a drift with time similar to that of mean air temperature. Deviations of mean air temperature from smooth trend, lasting for about a week, had no effect on the temperature of the potatoes; longerperiod deviations were reflected in the temperature of the potatoes after a lag of about a week. The difference in weekly mean temperature between potatoes and external air averaged about 1–5° C. in 1943–4. In 1942–3 it was greater, increasing to over 20° C. in April, because bacterial rotting of the potatoes following blight infection increased the rate of heat production and caused the clamp to collapse at the end of April.

scholarly journals Broiler surface temperature distribution of 42 day old chickens

2010 ◽  
Vol 67 (5) ◽  
pp. 497-502 ◽  
Author(s):  
Irenilza de Alencar Nääs ◽  
Carlos Eduardo Bites Romanini ◽  
Diego Pereira Neves ◽  
Guilherme Rodrigues do Nascimento ◽  
Rimena do Amaral Vercellino
Keyword(s):  
Temperature Distribution ◽  
Surface Temperature ◽  
Air Temperature ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Growth Period ◽  
The Body ◽  
Body Parts ◽  
Surface Temperature Distribution ◽  
Thermographic Image

Broiler chickens in Brazil are generally reared from 1 to 42 days when they are exposed to procedures such as fasting, harvesting, crating and transport to slaughter. Maintaining homeostasis is of great importance for broiler survival under harsh environment especially prior to slaughter. Heat loss varies in the distinct parts of the body during the growth period, and it is related to the air temperature of the environment and to the amount of feather covering. This research aimed to study the surface temperature distribution using infrared thermographic image processing to characterize 42 day old broiler chicken surface temperature prior to slaughter. Broilers were reared for 42 days and prior to harvest and transport to slaughter the infrared surface temperature was recorded along the day. Data from the thermograms taken in feather and featherless regions were compared during the 42nd day of growth. High correlation between featherless regions and air temperature was found showing that these areas respond fast to changes in the rearing environment. Two functions were developed for predicting both surface temperature for featherless and feather covered areas of the broiler body parts.

scholarly journals Evaluating Growth and Photosynthesis of Kimchi Cabbage According to Extreme Weather Conditions

Agronomy ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 1846
Author(s):  
Seung Hwan Wi ◽  
Hee Ju Lee ◽  
Sewoong An ◽  
Sung Kyeom Kim
Keyword(s):  
Net Photosynthetic Rate ◽  
Air Temperature ◽  
Photosynthetic Rate ◽  
Extreme Temperature ◽  
Extreme Weather ◽  
High Temperature Treatment ◽  
Growth Stages ◽  
Temperature Conditions ◽  
Extreme High Temperature ◽  
Gas Exchange System

The aim of this study was to develop and validate growth and photosynthetic models of Kimchi cabbages under extreme temperature conditions at different growth stages. Kimchi cabbage plants were subjected to low and high air temperatures 7–10 days after transplanting (DAT) and 40–43 DAT using extreme weather simulators. Except during these periods, the air temperature, relative humidity, solar radiation, and precipitation were set according to previous meteorological data. The experiments were performed over two years: in the first year, data were used to develop the models; the second-year experimental data were used for validation. The growth parameters and relative growth rate of Kimchi cabbage decreased due to low and high air temperature treatments. Photosynthetic CO2 response curves, which were measured using a portable gas exchange system, were used to calculate three biochemical parameters from measured data: photochemical efficiency, carboxylation conductance, and dark respiration. These parameters were used to develop the photosynthetic models (modified Thornley’s models) representing predictions of net photosynthetic rate by CO2 concentration and growth stage. The simulated photosynthetic rate with extreme high temperature treatment (35/31 °C) was 19.7 μmol m−2 s−1 which was evaluated approximately 3% deduction compared with control. Results of this study indicate that the growth and photosynthetic models developed here could be applied to evaluate retarded growth and net photosynthetic rate under extreme temperature conditions.

scholarly journals WATER-CONTAINING ABILITY OF COTTON LEAVES UNDER DIFFERENT TEMPERATURE CONDITIONS

2019 ◽  
pp. 164-166
Author(s):  
Alisher Muradullaevich Muradullaev
Keyword(s):  
Relative Humidity ◽  
Air Temperature ◽  
Water Holding Capacity ◽  
Relative Resistance ◽  
Cotton Variety ◽  
Temperature Conditions ◽  
Control Option ◽  
Air Temperatures ◽  
Water Holding

This article presents the results of studies on the change of the water-holding ability in leaves of some varieties and lines of cotton under the influence of various high air temperatures (I control option from +24.6 to + 35.4 °C; II option - from +36.4 to +45, 1 °C; III option - from +39.5 to + 48.4 °C). At a high air temperature of + 48.4 °C, the water-holding capacity of the leaves in varieties Surkhan-14, Istiklol-14, Bukhara-102 was 26.2; 24.6; 26.4%, which indicates the relative resistance of these varieties to high air temperatures. KEYWORDS: cotton, variety, line, high air temperature, relative humidity, water holding ability.

scholarly journals Mathematical modeling bringing the operation of air split conditioners heat pumps to the same internal temperature conditions

2021 ◽  
Vol 8 (3) ◽  
pp. 509-514
Author(s):  
V. Yo. Labay ◽  
◽  
V. Yu. Yaroslav ◽  
O. M. Dovbush ◽  
A. Ye. Tsizda ◽  
...  
Keyword(s):  
Air Temperature ◽  
Heat Pumps ◽  
Thermodynamic Efficiency ◽  
Condensation Temperature ◽  
Internal Temperature ◽  
Heating Systems ◽  
Evaporation Temperature ◽  
Temperature Conditions ◽  
Heating Capacity ◽  
The Mathematical Model

Nowadays, the use of heat pumps (HP) of air split-conditioners in air conditioning and heating systems of small industrial, public and residential facilities is becoming more common. It is known that the nominal heat capacity of HP of air split-conditioners is given in catalogs or reference literature under standard outdoor temperature conditions, namely: outdoor air temperature +7oС, indoor air temperature +21oС. At the same time, manufacturers of air split-conditioners do not ensure that, regardless of the size of heating capacity, all air split-conditioners have the same internal temperature conditions, namely: the evaporation temperature of the refrigerant and its condensation temperature. In this case, the thermodynamic efficiency, which can be best assessed by the exergetic output-input ratio (OIR) of different heating capacity of HP of air split-conditioners, is different; this, in our opinion, is incorrect. However, today there is a lack of mathematical models of bringing the operation of air split-conditioners HP to the similar internal temperature conditions, which will allow us to obtain the same exergetic OIR for different heating capacity of HP. To create the mathematical model of bringing the operation of HP of air split-conditioners to the equal internal temperature conditions, we have proposed them, namely: the evaporation temperature of the refrigerant +0.7oC and its condensation temperature +40oC. Taking these temperatures on the basis of the heat balances of the HP evaporator and HP condenser of air split-conditioners, we obtained the dependences for calculating air flow rates on the evaporator and condenser, which respectively maintain the proposed temperatures.

scholarly journals Effect of thermal environment on performance of broiler chickens using fuzzy modeling

Revista CERES ◽  
2017 ◽  
Vol 64 (4) ◽  
pp. 337-343
Author(s):  
Flávio Alves Damasceno ◽  
Déborah Cunha Cassuce ◽  
Lucas Henrique Pedrozo Abreu ◽  
Leonardo Schiassi ◽  
Ilda de Fátima Ferreira Tinôco
Keyword(s):  
Set Theory ◽  
Air Temperature ◽  
Fuzzy Set ◽  
Fuzzy Set Theory ◽  
Broiler Chickens ◽  
Thermal Environment ◽  
Second Phase ◽  
Feed Conversion ◽  
Productivity Losses

ABSTRACT This study aimed to develop a decision-support system based on fuzzy set theory, which can estimate welfare depending on the production responses of broiler chickens raised in climatic chambers. In the first phase, the influence of four different air temperature conditions on the performance of broilers was identified. Thus, the effect of air temperature on productivity was evaluated. In the second phase, a model was developed using the fuzzy set theory, in which feed intake responses, weight gain, and feed conversion were established according to age and the air temperature at which the birds were maintained, obtaining an efficient evaluation of the thermal environment. The results indicate that the proposed methodology is a promising technique for the determination of the level of thermal comfort endured by broilers, capable of assisting in making decisions on control of the thermal environment, avoiding productivity losses.

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