C/N Ratio and its Effect on Biofloc Development, Water Quality, and Performance of Penaeus Vannamei Juveniles High-Density-Zero-Exchange-Outdoor Tank System

2020 ◽  
pp. 133-146
Author(s):  
Wu-Jie Xu ◽  
Timothy C. Morris ◽  
Tzachi M. Samocha
Keyword(s):  
Water Quality ◽  
High Density ◽  
Penaeus Vannamei ◽  
Density Zero ◽  
Tank System ◽  
And Performance

Effect of different biofloc levels on microbial activity, water quality and performance of Litopenaeus vannamei in a tank system operated with no water exchange

2013 ◽  
Vol 56 ◽  
pp. 59-70 ◽  
Author(s):  
Rodrigo Schveitzer ◽  
Rafael Arantes ◽  
Patrícia Fóes S. Costódio ◽  
Carlos M. do Espírito Santo ◽  
Luis Vinatea Arana ◽  
...  
Keyword(s):  
Water Quality ◽  
Microbial Activity ◽  
Litopenaeus Vannamei ◽  
Water Exchange ◽  
Tank System ◽  
And Performance

scholarly journals Intercepted Photosynthetically Active Radiation (PAR) and Spatial and Temporal Distribution of Transmitted PAR under High-Density and Super High-Density Olive Orchards

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 351
Author(s):  
Adolfo Rosati ◽  
Damiano Marchionni ◽  
Dario Mantovani ◽  
Luigi Ponti ◽  
Franco Famiani
Keyword(s):  
Spatial Variability ◽  
Photosynthetically Active Radiation ◽  
Temporal Distribution ◽  
High Density ◽  
Radiation Use Efficiency ◽  
Spatial And Temporal Distribution ◽  
Active Radiation ◽  
Use Efficiency ◽  
And Performance ◽  
Radiation Use

We quantified the photosynthetically active radiation (PAR) interception in a high-density (HD) and a super high-density (SHD) or hedgerow olive system, by measuring the PAR transmitted under the canopy along transects at increasing distance from the tree rows. Transmitted PAR was measured every minute, then cumulated over the day and the season. The frequencies of the different PAR levels occurring during the day were calculated. SHD intercepted significantly but slightly less overall PAR than HD (0.57 ± 0.002 vs. 0.62 ± 0.03 of the PAR incident above the canopy) but had a much greater spatial variability of transmitted PAR (0.21 under the tree row, up to 0.59 in the alley center), compared to HD (range: 0.34–0.43). This corresponded to greater variability in the frequencies of daily PAR values, with the more shaded positions receiving greater frequencies of low PAR values. The much lower PAR level under the tree row in SHD, compared to any position in HD, implies greater self-shading in lower-canopy layers, despite similar overall interception. Therefore, knowing overall PAR interception does not allow an understanding of differences in PAR distribution on the ground and within the canopy and their possible effects on canopy radiation use efficiency (RUE) and performance, between different architectural systems.

Design, Installation, and Performance of Percolation Lysimeters for Water Quality Sampling

1993 ◽  
Vol 36 (2) ◽  
pp. 429-435 ◽  
Author(s):  
N. L. Klocke ◽  
R. W. Todd ◽  
G. W. Hergert ◽  
D. G. Watts ◽  
A. M. Parkhurst
Keyword(s):  
Water Quality ◽  
And Performance

scholarly journals Behavior and Performance of Natural Coagulants in Polluted Water

2020 ◽  
Vol 8 (5) ◽  
pp. 1096-1100
Keyword(s):  
Water Quality ◽  
Water Sample ◽  
Water Samples ◽  
Polluted Water ◽  
Chemical Parameters ◽  
Physical And Chemical Parameters ◽  
Natural Coagulants ◽  
And Performance ◽  
Physical And Chemical ◽  
Domestic Purpose

In this project, Polluted water sample from a Pond is collected for treating it by using Natural Coagulants. The pond is located in Madarpakkam Village, near Gummudipoondi, Tamilnadu, India. There were 4 water samples collected from four different points around the pond at depth of 0.5m, 1m, 1.5m and 2m. The water samples were analyzed for physical and chemical parameters with reference to the code IS 10500-1991. The objective of this project is to reduce the level of turbidity and bacteriological contaminants from water using locally available Natural Coagulants and to reduce the concentration of particular matter such as suspended particles, parasites, bacteria, algae, virus and fungi and to make use of the treated water for domestic purpose, as it reduces cost about 30% to 70%, the usage of these Natural coagulants will be more in future. It is nontoxic and non-corrosive. So, it is safe for human health. The usage of Natural coagulants can be increased in future as it increases the Water quality.

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