Results 71 to 80 of about 818,236 (379)

Indoor Concentration Distributions of Ammonia and Sulfur-Based Odorous Substances According to Types of Laying Hen Houses in South Korea

Atmosphere
In South Korea, environmental complaints related to livestock odors continue to increase, and various efforts are underway to overcome them. An objective of this study is to monitor indoor concentrations of ammonia and sulfur-based odorous substances ...
Ki-Youn Kim, Jung-Kon Kim
doaj   +1 more source

Response of three laying hen genotypes to two feed calcium levels

Czech Journal of Animal Science, 2019
The present study aimed to evaluate the effect of two dietary Ca levels (3.00% vs 3.50%) in three hen genotypes (ISA Brown, Bovans Brown and Moravia BSL) on their laying performance and quality of their eggs.
Mohamed Ketta, Eva Tumova, Darina Chodova   +2 more
doaj   +1 more source

Potential of LCA for designing technological innovations – the case of organic eggs [PDF]

, 2009
Ecological sustainability in agriculture is a concept that contains various environmental problems, which are caused by emission of pollutants and unsustainable use of limited resources, during different processes along the food chain.
Aarnink, A.J.A., Boer, I.J.M., de, Dekker, S.E.M., Groot Koerkamp, P.W.G.   +3 more
core  

Effects of Dietary Modification on Laying Hens in High-Rise Houses: Part I – Emissions of Ammonia, Hydrogen Sulfide and Carbon Dioxide [PDF]

, 2008
Dietary manipulation can substantially lower ammonia (NH3) emissions from laying-hen houses or manure storage. Recent lab studies showed a reduction of 40–60% in ammonia emissions for an experimental (EcoCalTM) diet as compared the standard or control ...
Bregendahl, Kristjan, Burns, Robert, Li, Hong, Roberts, Stacey, Xin, Hongwei, Xin, Hongwei   +5 more
core   +3 more sources

Interpretability and Representability of Commutative Algebra, Algebraic Topology, and Topological Spectral Theory for Real‐World Data

Advanced Intelligent Discovery, EarlyView.
This article investigates how persistent homology, persistent Laplacians, and persistent commutative algebra reveal complementary geometric, topological, and algebraic invariants or signatures of real‐world data. By analyzing shapes, synthetic complexes, fullerenes, and biomolecules, the article shows how these mathematical frameworks enhance ...
Yiming Ren, Guo‐Wei Wei
wiley   +1 more source

Search for the ideal laying hen for organic and free range systems [PDF]

, 2011
Since 1960 the majority of commercial layers are housed in cages. Non-cage housing started to appear again from 1980 onwards and increases in importance. It is questionable if birds bred to perform in cages are also suited for free range housing.
Bestman, Monique, Galea, Fabien, Leenstra, Ferry, Maurer, Veronika, Reuvekamp, Berry, van Niekerk, Thea, van Sambeek, Frans, Zeltner, Esther   +7 more
core  

Effects of cassava pulp fermented with Aspergillus oryzae as a feed ingredient substitution in laying hen diets

Journal of Applied Poultry Research, 2017
SUMMARY This study was conducted to investigate the effects of using cassava pulp fermented with Aspergillus oryzae as feed ingredient substitution to improve nutritive values in laying hen diets.
S. Okrathok, P. Pasri, R. Thongkratok, W. Molee, S. Khempaka   +4 more
semanticscholar   +1 more source

Dual Functions of Dietary Rubber Seed Oil Supplementation: Enriching N‐3 Polyunsaturated Fatty Acids and Enhancing Antioxidant Capacity in Pekin Ducks

Animal Research and One Health, EarlyView.
Dietary RSO supplementation improved growth performance, simultaneously enriched n‐3 polyunsaturated fatty acids (n‐3 PUFA), and enhanced antioxidant capacity in Pekin ducks, which suggested that RSO has the potential to be a novel n‐3 PUFA source and an antioxidant for Pekin ducks to generate animal functional foods.
Lei Zhuang, Yongbao Wu, Zitao Zhao, Junting Cao, Yanhong Guo, Zhanyue Wu, Qimeng Wang, Peilong Yang, Sen Wu, Zhiguo Wen, Shuisheng Hou   +10 more
wiley   +1 more source

Drying, a practical technology for reduction of poultry litter (environmental) pollution: methods and their effects on important parameters

Poultry Science
: Poultry farming generates significant poultry litter (broiler litter and laying hen manure), posing environmental and human health risks. Heat treatment, particularly through drying, can mitigate these adverse effects.
Mehdi Khodadadi, Aminolah Masoumi, Morteza Sadeghi   +2 more
doaj   +1 more source

Effects of Observed Incubation Behavior on Egg Production in Laying Hens of a Commercial Chicken Breed and Detection of Single-Nucleotide Polymorphisms Associated with the Incubation Behavior

The Journal of Poultry Science, 2022
Upon contact with laid eggs, avians initiate incubation behavior and stop laying additional eggs. This phenomenon suggests that the productivity of laying hens in free-range facilities may decrease because of frequent contact with laid eggs.
Yuichiro Yonetani, Atsushi J. Nagano, Hideki Ueno, Tomoko Amano   +3 more
doaj   +1 more source