scholarly journals Interactive Effects of Ammonia and Light Intensity on Hematochemical Variables in Broiler Chickens

2008 ◽  
Vol 87 (7) ◽  
pp. 1407-1414 ◽  
Author(s):  
H.A. Olanrewaju ◽  
J.P. Thaxton ◽  
W.A. Dozier ◽  
J. Purswell ◽  
S.D. Collier ◽  
...  
Keyword(s):  
Light Intensity ◽  
Broiler Chickens ◽  
Interactive Effects

Interactive Effects of Ammonia and Light Intensity on Ocular, Fear and Leg Health in Broiler Chickens

2007 ◽  
Vol 6 (10) ◽  
pp. 762-769 ◽  
Author(s):  
W. W. Miller ◽  
W. R. Maslin ◽  
J. P. Thaxton ◽  
H. A. Olanrew ◽  
W.A. Dozier, II ◽  
...  
Keyword(s):  
Light Intensity ◽  
Broiler Chickens ◽  
Interactive Effects

scholarly journals The effect of light intensity on the behavior, eye and leg health, and immune function of broiler chickens

2009 ◽  
Vol 88 (1) ◽  
pp. 20-28 ◽  
Author(s):  
R.A. Blatchford ◽  
K.C. Klasing ◽  
H.L. Shivaprasad ◽  
P.S. Wakenell ◽  
G.S. Archer ◽  
...  
Keyword(s):  
Light Intensity ◽  
Immune Function ◽  
Broiler Chickens ◽  
Effect Of Light

scholarly journals Interactive Effects of Light and Nitrogen on Pakchoi (Brassica chinensis L.) Growth and Soil Enzyme Activity in an Underground Environment

Agronomy ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1772
Author(s):  
Songsong Li ◽  
Chao Liu ◽  
Xiao Tan ◽  
Bo Tan ◽  
Yuxin He ◽  
...  
Keyword(s):  
Enzyme Activity ◽  
Light Intensity ◽  
Nitrogen Addition ◽  
Soil Enzyme ◽  
Soil Enzyme Activity ◽  
Interactive Effects ◽  
Light Conditions ◽  
Nitrogen Application ◽  
Plant Yield ◽  
Plant Microbe Interaction

Light conditions and nitrogen fertilizer are crucial for plant growth, especially in the underground situations without sunlight and nitrogen deposition. In this paper, the effects of photoperiod (12 h and 16 h lighting time per day), light intensity (200, 300 and 400 μmol m−2 s−1) and nitrogen addition (0, 0.15, 0.3 and 0.45 g N kg−1 soil) on pakchoi growth and specific soil enzyme activity were investigated. The results demonstrated that there were strong interactive effects of light intensity and nitrogen addition on plant yield. The plant yield changed parabolically with increasing nitrogen addition when a light intensity was given between 200 and 300 μmol m−2 s−1, while the yield decreased linearly with increasing nitrogen application under the light intensity of 400 μmol m−2 s−1. The combination of 16 h photoperiod, 300 μmol m−2 s−1 light intensity and 0.3 g N kg−1 soil nitrogen addition was the best for pakchoi growth. The investigation of soil enzyme showed that the activity of urease responded negatively to nitrogen addition, whereas the activity of phosphatase had positive correlation with light intensity but was not affected by nitrogen addition. Our results suggested that the toxic effect of excessive nitrogen was a better explanation for the interactive effects of light and nitrogen than the plant-microbe interaction framework. The critical toxicity level of nitrogen for pakchoi was determined and showed negative correlation with light intensity.

Evaluating vitamin D with graded levels of strontium supplementation on broiler chicken performance and mineral composition

2016 ◽  
Vol 56 (1) ◽  
pp. 70
Author(s):  
L. C. Browning ◽  
A. J. Cowieson
Keyword(s):  
Vitamin D ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Bodyweight Gain ◽  
Interactive Effects ◽  
Negative Effects ◽  
Bone Composition ◽  
Tibia Bone ◽  
Commercial Broiler ◽  
Four Levels

In order to examine the interactive effects of strontium and cholecalciferol in broiler nutrition a total of 288 male broiler chickens were fed over 28 days, eight different diets with six replicates comprising of two levels of vitamin D (5000 and 10 000 IU/kg) and four levels of strontium (0, 400, 800 and 1200 mg/kg) provided as strontium carbonate. Vitamin D and strontium produced a significant interaction on growth and feed efficiency with the addition of higher levels of vitamin D ameliorating the negative effects of strontium at 1200 mg/kg. The higher level of vitamin D also improved bodyweight gain (P < 0.05), had no effect on tibia bone composition but reduced calcium, phosphorus, potassium and magnesium retention (P < 0.05). Strontium supplementation produced no advantage to chicken performance but changed tibia bone composition. It was found that calcium and sodium maintained a ratio of ~30 : 1 in tibia bone. Vitamin D and strontium produced a significant physiological interaction and further research is required to elucidate optimum levels of supplementation for commercial broiler chicken production.

Light intensity during rearing affects the behavioural synchrony and resting patterns of broiler chickens

2009 ◽  
Vol 50 (3) ◽  
pp. 275-283 ◽  
Author(s):  
G.M. Alvino ◽  
R.A. Blatchford ◽  
G.S. Archer ◽  
J.A. Mench
Keyword(s):  
Light Intensity ◽  
Broiler Chickens

The control of color change in the Pacific tree frog, Hyla regilla

2004 ◽  
Vol 82 (6) ◽  
pp. 889-896 ◽  
Author(s):  
James C Stegen ◽  
C M Gienger ◽  
Lixing Sun
Keyword(s):  
Light Intensity ◽  
Environmental Variables ◽  
Color Change ◽  
Interactive Effects ◽  
Tree Frog ◽  
Background Color ◽  
Hyla Regilla ◽  
Background Matching ◽  
The Pacific ◽  
Initial Color

A number of environmental variables have been identified as affecting anuran color, but rarely have the interactions between these variables been investigated. In attempt to elucidate the function of color change, we conducted a within-subject, full factorial experiment designed to determine the simple and interactive effects of background, temperature, and light intensity on the rate of color change in the Pacific tree frog (Hyla regilla Baird and Girard, 1852). Color was investigated holistically, as well as by decomposing it into its constituent parts (hue, chroma, and lightness), using digital photography. The rate of color change was faster on the green versus the brown background, at 10 versus 25 °C, and at low versus high light intensity. There was also a significant effect of the interaction between background color and temperature on the rate of color change. We found increased rates of hue, chroma, lightness, and color change with increasing initial hue, chroma, lightness, and color distances between the Pacific tree frog and its background, respectively. In addition, initial color distance covaried with changes in environmental variables. After controlling for initial color distance, and thus the effects of background matching, background color and temperature still showed a significant interaction for their effects on rate of color change. These results suggest that crypsis (i.e., background matching) is not the only function of physiological color change in H. regilla. Physiological color change may also be used to hydro- and (or) thermo-regulate.

scholarly journals Effect of ambient temperature and light intensity on physiological reactions of heavy broiler chickens

2010 ◽  
Vol 89 (12) ◽  
pp. 2668-2677 ◽  
Author(s):  
H.A. Olanrewaju ◽  
J.L. Purswell ◽  
S.D. Collier ◽  
S.L. Branton
Keyword(s):  
Light Intensity ◽  
Ambient Temperature ◽  
Broiler Chickens ◽  
Physiological Reactions
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