52 research outputs found
ВЛИЯНИЕ НА СРОКА НА СЪХРАНЕНИЕ НА РАЗПЛОДНИТЕ ЯЙЦА ВЪРХУ ИНКУБАЦИОННИТЕ ПОКАЗАТЕЛИ ПРИ ЯПОНСКИ ПЪДПЪДЪЦИ
No full textThe purpose of the present study was to establish the effect of the prolonged storage of Japanese quail hatching eggs upon the incubation performance and the quality of hatched quail chicks.
The duration of egg storage prior to their incubation had a weak negative effect on the weight loss from incubation day 0 to day 15. Eggs stored for 1-3 days exhibited a statistically signifi cantly higher weight loss than eggs stored for 8-11 days prior to incubation (PЦелта на настоящото проучване е да провери влиянието на продължителното съхранение на разплодните яйца от Японски пъдпъдъци върху резултатите от инкубацията и качеството на излюпените пъдпъдъци. Продължителността на съхранение на яйцата преди инкубацията оказва слаб, отрицателен ефект върху
загубата на маса през инкубационния период от 0 до 15 дни. Загубата на маса при яйцата, съхранявани 1-3 дни е достоверно по-висока от тази при яйцата, съхранявани 8-11 дни преди инкубацията (
ВЛИЯНИЕ НА ЗАМЯНАТА НА ТРУПНО БРАШНО ВЪВ ФУРАЖНАТА СМЕСКА С БРАШНО ОТ КАКАВИДИ НА КОПРИНЕНАТА ПЕПЕРУДА (BOMBYX MORI L.) ВЪРХУ РАСТЕЖА НА ЯПОНСКИТЕ ПЪДПЪДЪЦИ
No full textA study is carried out with two groups of japanese quails in order to check the possibility to substitute cocoon meal (B.mori L.) for meat meal as well as to evaluate a growth potential in these conditions. The forage mixture of control group contains 7% meat meal. The experimental forage mixture contains 7% cocoon meal and has equal nutritive value. The substitution of meat meal with the cocoon meal in quails food results in better growth development during
first days of their life. Both sexes have higher body weight - 11.1%; 8.7% and 9.8% respectively in 7th, 14th and 21 day of life. Feed conversion ratio (FCR) during the period from 0 to 35th day as well as the fi nal body weight of birds in two groups is equal. The cocoon meal can be the suitable constitutor in starter forage mixture for quails guaranteed equivalent growth and FCR.Проведено е проучване с две групи японски пъдпъдъци с цел да се установят възможностите за заместване на трупното брашно с брашно от какавиди на копринената пеперуда (Bombyx mori L.) и да се оценят растежните способности на пъдпъдъците при това. Фуражната смеска на контролната група съдържаше 7% трупно
брашно, а на опитната - 7% какавидено, при еднакъв хранителен състав. Заместването на трупното брашно с какавидено в смеските за пъдпъдъци е свързано с по-добро тегловно развитие на птиците през първите дни от живота им. Общо за двата пола живото тегло на птиците от опитната група е било достоверно по-високо с 11,1; 8,7 и 9,8% съответно на 7-, 14- и 21-дневна възраст. Конверсията на фураж за периода 0-35 дни, както и
крайното живо тегло на птиците от двете групи са практически еднакви. Какавиденото брашно може успешно да замени трупното в стартерните смески за пъдпъдъци, като гарантира равностоен растеж и конверсия на фуража
INFLUENCE OF SUBSTITUTION OF COCOON MEAL (BOMBYX MORI L.) FOR MEAT MEAL IN FORAGE MIXTURES ON JAPANESE QUAILS GROWTH
No full textA study is carried out with two groups of japanese quails in order to check the possibility to substitute cocoon meal (B.mori L.) for meat meal as well as to evaluate a growth potential in these conditions. The forage mixture of control group contains 7% meat meal. The experimental forage mixture contains 7% cocoon meal and has equal nutritive value. The substitution of meat meal with the cocoon meal in quails food results in better growth development during first days of their life. Both sexes have higher body weight - 11.1%; 8.7% and 9.8% respectively in 7th, 14th and 21 day of life. Feed conversion ratio (FCR) during the period from 0 to 35th day as well as the fi nal body weight of birds in two groups is equal. The cocoon meal can be the suitable constitutor in starter forage mixture for quails guaranteed equivalent growth and FCR
INFLUENCE OF HATCHING EGGS STORAGE PERIOD UPON THE INCUBATION PARAMETERS IN JAPANESE QUAILS
No full textThe purpose of the present study was to establish the effect of the prolonged storage of Japanese quail hatching eggs upon the incubation performance and the quality of hatched quail chicks. The duration of egg storage prior to their incubation had a weak negative effect on the weight loss from incubation day 0 to day 15. Eggs stored for 1-3 days exhibited a statistically signifi cantly higher weight loss than eggs stored for 8-11 days prior to incubation (P<0.001). Eggs stored for up to 8 days showed a tendency towards statistically signifi cant (P<0.05) longer period of incubation. The relationship between incubation period length and egg storage term was moderate, curvilinear and the effect of egg storage term was estimated at 14.3% оf the total dispersion of the trait. Despite the egg storage term prior to incubation, quails with high relative weight had a statistically signifi cant shorter period of incubation. The analysis of the combined effects of egg storage term and relative weight at hatching on incubation length showed that both factors complemented each other and even enhanced their effects upon the determination of the studied trait. The strength of these factors’ effects was estimated at 13.1% of the total dispersion of the incubation period length (P<0.001), with a leading role of the factor relative weight of hatched quail chicks
Methods for introduction of objective criteria for bioconversion of energy and nutrients along the feed-animal products chain in meat-type poultry farming
No full textThe authors propose a new approach for the determination of the conversion of energy and nutrients from the consumed feed (primary unit) to animal products (secondary unit). For this purpose, specific criteria for the conversion of energy and nutrients (“Clarke of distribution of the energy” and “Clarke of transformation of the protein/amino acids”) are introduced, so as an exemplary methodology for their calculation is shown. In the model calculations data from real experiments with Japanese quails are used. Although the proposed criteria are not economic, the authors suggest that their input will be a good basis for selection and technology assessment in the meet poultry breeding
Assessment of Water Quality as a Key Component in the Water–Energy–Food Nexus
No full textThe intensive economic activity along the Bulgarian Black Sea coast is causing serious changes in the quality of the river water. In view of the topicality of the problem, the main goal of this article is to emphasize the water quality as a necessary key component in the water–energy–food nexus by determining the status of the surface waters of selected Bulgarian Black Sea tributaries from the point of view of their physicochemical characteristics. The research is based on the Water Framework Directive (WFD)—2000/60/EU and the relevant national legislation. In the present study, the Canadian Complex Water Quality Index (CCME, WQI) was applied to determine the quality of river waters. The novelty in the present study is a definite and necessary emphasis on the opinion that the analysis and assessment of water quality should become an integral part of all studies of the water–energy–food nexus
Territorial features and dynamics in the water quality change in the Topolnitsa and Luda Yana rivers
No full textIn this article the current changes in the water quality of rivers Topolnitsa and Luda Yana have been analyzed and evaluated. The river basins are under the significant anthropogenic impact of various origins and nature. The main sources of pollution, the emitted substances and the spatiotemporal features of the change of the water quality are determined. Several indices for complex assessment of river waters have been used to assess the status of water - (Water Quality Index - Canada; Water Pollution Index - Russia; Chemical Index for River Water Quality (CJ) - Germany)
Безконтактно измервателно устройство за определяне масата на птичи яйца
No full textIn this article a possibility of application of the non-contact method for prediction the poultry eggs weight in storage period of 21 days was researched. A prediction assessment was made by shape features, capacitance, resistance and conductance of eggs. Feature vectors were selected and reduced data by principal component and partial least squares regression methods were used. A non-contact device was proposed and developed to determine the egg weight by video sensor and measurement cell. In order to obtain data for post-processing, a software application was designed. The developed algorithms and procedures were applied to determine the eggs weight, whereby that parameter of eggs could be predicted with the lowest relative error. The survey results show that the eggs weight could be predicted by the
proposed system for contactless measurement with accuracy of 94-98%.В тази статия е проучена възможността за прилагане на безконтактен метод за прогнозиране масата на птичи яйца в период на съхранение от 21 дни. Направена е оценка на възможността за прогнозиране по признаци на формата, капацитет, електрическо съпротивление и електрическа проводимост на яйцата. Избрани са
характеристични вектори и са използвани редуцирани данни при регресия по главни компоненти (PCR) и метод частична регресия на най-малките квадрати (PLSR). Предложено и разработено е безконтактно устройство за определяне масата на яйца чрез видео сензор и измервателна клетка. За получаване на данни за последваща обработка, е създадено програмно приложение. Разработените алгоритми и процедури са приложени за определяне масата на яйца, при което този параметър може да се прогнозира с най-ниската относителна грешка. Резултатите от изследването показват, че масата на яйцата може да се прогнозира чрез предложената система за безконтактно измерване с точност от 94-98%
INVESTIGATION ON THE WATER CONSUMPTION BY LAYING JAPANESE QUAILS (COTURNIX COTURNIX JAPONICA)
No full textRaman Spectroscopy of Mackinawite FeS in Anodic Iron Sulfide Corrosion Products
No full textRaman spectroscopy in a confocal microscope was used to study electrochemically synthesized corrosion products from sour gas experiments. When exposed to oxygen-containing atmosphere, the initial mackinawite FeS corrosion product transformed under laser irradiation to hematite, Fe2O3. Measurements with a thin water layer on top of the corrosion products prevented the transformation, as drying was prevented. In situ Raman measurements of mackinawite formation avoided the problem of transformation completely. In situ and operando, the initially formed mackinawite showed two Raman peaks in the wavenumber range > 180 cm− 1 centered around 200–215 cm− 1 and 285–300 cm− 1. On an empirical basis, these modes were assigned to a B1g mode of the iron sublattice and an A1g mode of the sulfur sublattice, respectively. A comparison with a literature assignment for aged mackinawite suggests that the aging observed involves significant changes in the sulfur sublattice.© The Author(s) 2016. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (CC BY, http://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse of the work in any medium, provided the original work is properly cited
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