ISSN 2285-5750, ISSN CD-ROM 2285-5769, ISSN-L 2285-5750, ISSN Online: 2393 – 2260
 

Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 1
Written by Victor ŢÎŢEI, Sergiu COŞMAN, Valentina COŞMAN, Serghei COZARI

Forage legumes are an essential component of agricultural systems in temperate regions of the world. Sainfoins (Onobrychis Mill.) are Eurasian legume perennial herbs, characterized by the highest condensed tannin content, provide beneficial effects and protect animals against bloat and increase protein absorption. In comparison with other species of fodder legumes, it is less demanding to the soil and if there is enough moisture in the soil, it produces high yields even in the poorest soils. We studied some biological peculiarities, the biochemical composition and the fodder value of a local ecotype of sand sainfoin, Onobrychis arenaria, grown in an experimental field of the National Botanical Garden (Institute), Chişinău. In the second growing season, the sand sainfoin was characterized by optimal growth rate and regenerative capacity after mowing, making it possible to cut it three times per season. It was established that the harvested green mass contained 169.6-264.5 g/kg dry matter. The concentration of nutrients in green mass dry matter was: crude protein 169.6-183.9 g/kg, crude fats 22.0-31.8 g/kg, crude cellulose 273.9-297.7 g/kg, nitrogen free extract 412.8 -447.2 g/kg, soluble sugars 34.4-73.2 g/kg, starch 15.9-23.3 g/kg, ash 74.1-83.6 g/kg, calcium 7.3-11.3 g/kg, phosphorus 2.5-2.7 g/kg, carotene 42.00-45.45 mg/kg. The hay prepared after the first and second cuts contained 163.8-167.9 g/kg crude protein, 16.5-17.0 g/kg crude fats, 315.2-366.7 g/kg crude cellulose, 377.1-413.7 g/kg nitrogen free extract, 75.5-83.6 g/kg ash, 7.7-9.9 g/kg calcium and 2.3-2.9 g/kg phosphorus, 7.86-8.66 MJ/kg metabolizable energy. The biochemical and the fodder value of the prepared haylages were: pH 4.75-5.16, lactic acid 51.5-53.0 g/kg, acetic acid 2.4-4.6 g/kg, butyric acid 0.3-0.4 g/kg, crude protein 164.9-174.9 g/kg, crude fats 26.1- 27.4 g/kg, crude cellulose 278.2-300.3 g/kg, nitrogen free extract 428.9-439.3 g/kg, sugars 14.6-25.8 g/kg, starch 16.7- 20.7 g/kg, calcium 9.3-9.9 g/kg, phosphorus 2.6-3.0 g/kg and 7.72-7.78 MJ/kg metabolizable energy.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXII, Issue 1
Written by Tsvetelina NIKOLOVA, Vera PETROVA

An analysis of the influence of climatic factors on the honey qualities of Phacelia tanacetifolia Benth was carried out by conducting the field experiments. The main objective is to study the influence of air temperature and humidity on the formation and extraction of nectar from plants flowers. Determine the impact of climatic factors on the flowering duration, the number of plant blooms, the amount of nectar, and the composition of sugars in the nectar.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXII, Issue 2
Written by Georgeta DINIȚĂ, Monica Paula MARIN, Daniel Severus DEZMIREAN, Minodora TUDORACHE, Ioan CUSTURĂ

The results of former research concerning the development of inbred lines in native silkworms breeds, established the technologic formation procedures and pointed out reduced values of inbreeding depression in the productive characteristics. The object of the present research aims are the identification and selection of the most productive inbred lines based on crossing with tester constant lines, namely the research of general combining capacity; establishing specific combining capacity by direct and reciprocal crossing and estimation of heterosis effect. The results of research emphasize that from those 14 inbreeding lines tested for combining capacity, 7 and 10 maternal lines and 3 paternal lines obtain heterosis results that demonstrate superior possibilities of turning into account the crossbreeding system in silkworms raising. The heterosis effect is obvious important foe shell weight.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 1
Written by Lorena DEDIU, Angelica DOCAN, Iulia GRECU, Mirela CRETU, Daniela IBĂNESCU, Cristian RAMNICEANU, Victor CRISTEA

The main purpose of the present experiment is to evaluate if the growth performance, feed utilization and survival rate of rainbow trout (Oncorhynchus mykiss) fingerlings are influenced by factors such as initial stocking size, stocking density, diet or their interaction. This study was based on a 3x3x2 factorial design with three rearing densities (D1 = 2.61±0.22 kg/m3, D2 = 3.90 ±0.06 kg/m3 and D3 = 4.80±0.08 kg/m3), three size classes (SC1 = 2.22±0.24 g/ex, SC2 = 4.90 ±0.18 g/ex and SC3 = 6.87±0.016 g/ex) and two levels of dietary protein (LP = 45%, HP = 50%). After an experimental period of 70 days, rainbow trout growth performance was evaluated through analysis of various technological indicators: IWG (individual weight gain), FCR (food conversion ratio), SGR (specific growth rate), Relative Growth Rate (RGR), PER (protein efficiency ratio). The statistical analysis of data showed significant differences regarding growth among variants both in terms of density and size class. Diet and fish size factors, and the interaction between these, contributed significantly to the variation in protein efficiency ratio.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 1
Written by Dănuț Nicolae ENEA, Gheorghe Emil MĂRGINEAN, Monica Paula MARIN, Carmen Georgeta NICOLAE, Ayman Abdel Mohsen HASSAN, Livia VIDU

The objective of this research was to evaluate the correlation between the conformation traits and milk production at Holstein cows in Romania. It is well known the fact that milk production is influenced by many factors like: management, genetics, nutrition, season etc. But this study wants to reveal if the milk production is correlated with the conformation traits and how they influence it. In the study were taken farms from three different areas of Romania, East, South and West, also were analyzed farms of different size (small, medium and big). The animals that took part at the study were at first, second or third lactation. For all the cows were appreciated a number of 22 characters, characters that are separated in five different groups: dairy capacity, dairy character, rump, feet & legs and mammary. All the classified animals were between 20-120 days in lactation. To avoid possible inconclusive conclusion, in the study were compared cows from same area, farm dimension and number of lactation.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXII, Issue 2
Written by Robert MIHAI, Costel MIHALASCU, Gheorghe Emil MĂRGINEAN, Monica Paula MARIN, Mirela Aurora CĂRĂTUȘ, Livia VIDU

The Montbeliarde breed became known in Romania after 2009 when several animals from France were imported. This breed is robust, has easily adapted to the growing conditions in Romania and the milk has a special quality. This study was conducted in the Didactic Farm Moara Domnească on a number of 25 dairy cows during 2017-2018. The quantitative and qualitative parameters of milk production were analyzed, based on records on the farm, as well as periodical analysis reports.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 1
Written by Cristian Romeo REVNIC, Flory REVNIC, Silviu VOINEA

Aim of study is to point out the role of charges distribution at the level of contractile proteins in Contraction and Relaxation state of skeletal and cardiac muscle cells from rats of different ages ,by means of 22Na uptake method in order to bring new arguments in the favor of swelling theory (lateral expansion of filaments network) of muscle contraction in skeletal and cardiac muscle during aging process .Material and method: The study was done on 16 male Wistar rats divided into two groups of 8 rats each: I) 6 months old and II) 37 months old. The animals were anesthetized and then sacrificed and samples from sartorius skeletal muscle and from papillary muscle from left ventricle were excised and placed in glycerol solution in order to remove cell membranes and to expose the contractile apparatus. Our Na22 uptake studies pointed out another structural aspect of functional implication of contractile proteins with modified features from 37 months old skeletal and cardiac muscle and the data concerning the charges distribution at the level of contractile proteins in Contraction and Relaxation which bring new arguments in the favor of swelling theory( lateral expansion of filaments network) of muscle contraction in skeletal and cardiac muscle during aging process.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXII, Issue 2
Written by Angelica DOCAN, Lorena DEDIU, Mirela CREȚU

Silurus glanis are an important romanian aquaculture species raised for food and sport fishing, especially in polyculture tehnology but also in the intensive semi-closed and recirculation sistems. The aim of present study was to obtain a basic knowledge of the leukocyte reaction of European catfish under the action of toxic metabolites (aflatoxin B) secreted by the mold Aspergillus flavus. The sampling of blood from the healthy and affected Silurus glanis exemplars allowed determination of white blood cell count. In order to achieve the purpose of the experiment the blood samples were immediately used to make smears which were colored with May-Gründwald Giemsa panoptic method. By studying different types of leucocytes was determined leukograma and absolute number of leukocytes. Physiological stress induced by toxic metabolites secreted by the mold is reflected in the hematological parameters - white blood cell count (significant decrease, p=<0.05). In the infected fish with aflatoxin the total number of leukocytes has been registered statistically significant changes with lymphopenia, neutrocytosisand eosinophilia. The hematological changes of infected fish led to the affect the immune defense system of the Silurus glanis specie.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Galina ILYINA, Dmitrii ILYIN, Lilia OSHKINA, Aleksandr OSTAPCHUK

The possibilities of using the vegetative mycelium of xylotrophic fungi of the varnished tinder fungus (Curt.:Fr.) P. Karst. and tinder funnel of sulfur yellow (Bull.) Murrill as food additives for poultry of the parent flock. These types of mushrooms are known as promising biotechnology producers of compounds of sterol and carbohydrate nature, carotenoids, vitamins and other substances with high biological activity. In the process of growing the mycelium was enriched with trace elements germanium, which can partially stop oxygen starvation in tissues. Powdered feed additives were fed with the main diet and allowed to increase the total blood protein of poultry against the background of fraction growth by 5-7%, and the hemoglobin content - by 7-9%. A positive effect on the immune parameters of the parent flock blood and the antioxidant status of their body were established, and a decrease in the markers of oxidative processes was shown. Feed additives allowed to increase the safety of the parent poultry flock, improve incubation rates of eggs, increase the rates of chickens by 5-6% relative to the control.

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Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 1
Written by Aurelia NICA, Mihai-Stefan PETREA, Alina MOGODAN, Ira-Adeline SIMIONOV, Victor CRISTEA

Fish shape, size and coloration are important quality indicators for determining the market value of ornamental fish species. Therefore, ornamental carp rearing technologies must target proper values of these quality indicators, while maximizing fish growth performance and profitability. The aim of present study is to evaluate the influence of administrated food type (natural diet - V1 8.8% protein vs. formulated diet - V2 55% protein) on growth performance and coloration of Japanese ornamental carp, while maintain the feed operational cost. The average specific growth rate indicates a superior fish production at V2 (formulated diet), compared to V1 (natural diet) experimental variant, while the average food conversion ratio (FCR) indicates better values for V2 (1 g feed/g biomass gain), compared to V1 (4.5 g feed/g biomass gain). The protein efficiency ratio (PER) registered higher values at V1 (2.52), compared to V2 (1.8), most probably due to protein input limited by feed operational cost restriction. The administration of the live food indicates a better fish coloration, compared with V2, where artificial feed was administrated. Therefore, natural diet can improve coloration of juvenile ornamental carp.

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© 2019 SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE. To be cited: SCIENTIFIC PAPERS. SERIES D. ANIMAL SCIENCE.

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