Results 61 to 70 of about 149,961 (158)
Genetics of survival in cannibalistic laying hens: The contribution of social effects [PDF]
, 2009 Mortality due to cannibalism in laying hens is a worldwide economic and welfare problem occurring in all types of commercial poultry housing systems. Due to prohibition of beak-trimming and the traditional battery system in the European Union in the near
Ellen, E.D.
core
, 2021 The study of stress in the conditions of industrial technologies of keeping laying hens and determining the level of technological stressors influence on the physiological state of poultry is a necessary condition for the development of new methods of ...
Yu. Osadcha
core +1 more source
Siliao yanjiu, 2021 The experiment studied the effect of different doses of compound Chinese herbal medicine additives on fat deposition and lipid metabolism in green-eggshell laying hens.
Jie-rui ZHOU +6 more
doaj
Dietary Sodium for Laying Hens
Poultry Science, 1977 Dietary sodium requirements of laying hens in open type and evaporatively cooled housing were determined to be 0.126 and 0.145% of the diet, respectively. The lowest level of 0.04% sodium supported average rates of production of 49.1 and 60.3% in the two houses for the 28 weeks of the study.
openaire +2 more sources
Does nest size matter to laying hens? [PDF]
, 2014 Laying hens in loose housing systems have access to group-nests which provide space for several hens at a time to lay their eggs. They are thus rather large and the trend in the industry is to further increase the size of these nests. Though practicality
Harlander, Alexandra +4 more
core +3 more sources
, 2017 This research aimed to study long-term addition natural herbal: mangosteen pericarp meal and non-herbal: vitamin E in the diet on digestive organs, accessory organs, reproductive organs, and carcass of laying hens.
Rita Mutia +9 more
core +1 more source
Siliao yanjiu, 2022 The experiment was to study the effect of Bacillus subtilis and Clostridium butyricum on produciton performance, egg quality, serum biochemical and immune indexes of laying hens.
LI An-dong +7 more
doaj
AgricultureThis study aimed to verify the potential of calcium lactate for the performance, blood index, shinbone quality, jejunal immunity, and egg quality of aged laying hens.
Kai Qiu +4 more
doaj +1 more source
Effect of body weight of laying hens on production traits of broiler parents [PDF]
Biotechnology in Animal Husbandry, 2017 Certain investigations have been conducted in two broiler breeder flocks of Ross 308 and Cobb 500 hybrids. At the beginning of the production cycle (24 weeks of age), an average laying hens' body weight of 2680.40 g was found in the case of Ross 308 ...
Đermanović Vladan +2 more
doaj
Effects of induced molting on lipid accumulation in liver of aged laying hens
Poultry ScienceAs the age of laying increases, the metabolic capacity of the liver decreases, leading to excessive lipid accumulation, which seriously affects the laying performance of laying hens.
Yibo Lv +6 more
doaj +1 more source