A bio-economic analysis model in Tetra H hybrid raised in organic system

This paper shows a bio-economic analysis model in Tetra H hybrid, raised in organic system, in line with the protein intake and of the body weight registered during the experimental period. The mathematic model y=a/(l+bx+cx2) allows the assessment of the expenses recorded with chicken feeding depending on crude protein intake. The model also validates the possibility to simplify the chickens' nutrition technology (starting from a triphase fodder feeding to a diphase fodder feeding) and at nutritional (protein) levels adapted to the desired body weight. The indices of correlation between the expenses registered with fodder feeding and crude protein intake show us that between them there is a strongly positive correlation, thus: 0.958 (in Tl), 0.980 (in T2) and 0.972 (in T3). The indices of determination (R2) corresponding to the three experimental variants are higher, with values over 0.963, and the error percentage of the mathematical model is reduced (below 6%). Based on the results obtained in Tetra H chickens, it may be recommended a diphase fodder feeding (with starter fodder between 1-21 days and grower-finisher fodder between 22-112 days) with concentrates mixtures (CM) by 22% and 17,5% CP and 2971 and 3160 kcal ME/kg

A bio-economic analysis model in Tetra H hybrid raised in organic system

This paper shows a bio-economic analysis model in Tetra H hybrid, raised in organic system, in line with the protein intake and of the body weight registered during the experimental period. The mathematic model y=a/(l+bx+cx2) allows the assessment of the expenses recorded with chicken feeding depending on crude protein intake. The model also validates the possibility to simplify the chickens' nutrition technology (starting from a triphase fodder feeding to a diphase fodder feeding) and at nutritional (protein) levels adapted to the desired body weight. The indices of correlation between the expenses registered with fodder feeding and crude protein intake show us that between them there is a strongly positive correlation, thus: 0.958 (in Tl), 0.980 (in T2) and 0.972 (in T3). The indices of determination (R2) corresponding to the three experimental variants are higher, with values over 0.963, and the error percentage of the mathematical model is reduced (below 6%). Based on the results obtained in Tetra H chickens, it may be recommended a diphase fodder feeding (with starter fodder between 1-21 days and grower-finisher fodder between 22-112 days) with concentrates mixtures (CM) by 22% and 17,5% CP and 2971 and 3160 kcal ME/kg

Monitoring of Bee Colonies’ Activity During the Major Gatherings in 2017

The assessment of the meteorological factors, in direct correlation with the nectar release and honey production, helps beekeepers with the organization of the technological activities within the apiary (determination of the pastoral schedule, supplementary feedings, reproduction of bee colonies, honey harvest, etc.). The study was carried out between 14th of April and 20th of July 2017, on 20 Apis mellifera carpatica bee colonies, maintained in multi-layer and Dadant beehives. The bee colonies were transported in field for rape, acacia and sunflower gathering and monitored with the help of the BeeWatch Professional device. The rape and acacia gatherings were negatively influenced by low temperatures and heavy rainfall, which impeded the capitalization of the melliferous potential. The bee colonies gathered only 5 kg rape honey and 3.9 kg acacia honey/bee colony/period. As regards the sunflower, the weather conditions were optimal for gathering, and the bee colonies gathered the supplies necessary for winter and also 5 kg honey extra. The honey production obtained by the bee colonies studied was not influenced by the beehive type; it was strongly influenced by the environmental factors, temperature and humidity

Economic benefits arising from the prebiotically enhanced supplementary feeding of honeybee colonies

Addition of prebiotic (acidifying) products to the supplementary feeds provided to honeybee colonies has a positive effect on colony health through favouring the development of a beneficial intestinal microflora. It also increases queen fecundity and oviposition leading to fast colony recruitment. We report the economic benefits of using acidifying substances (cider vinegar and lactic acid) in spring feeding supplements given to colonies. Trialling was conducted at Jebel, Romania between April 15 and May 4 2011 using 30 colonies which each received 1.4 l per week of supplemental feed sugar syrup with these substances added. Acacia honey production was assessed by weight at the end of May. Production was found to be significantly higher in the treatment group compared with the control (p<0.05) resulting, for the treatment group, in a predicted economic premium ranging between 9.38 and 22.06%

Influence of the Use of Diluents in the Technique of Homogenization of Beekeeping Seminal Material - Review

Mixing bee semen is a necessary step in collecting the genetic structure from individuals with high production values, a method that serves with great success the intention of a very closed, intense and long-term selection program. Whether we talk about the technique of mechanical-gentle homogenization, more recently proposed, or the one by centrifugation, the use of diluents or extensions for the seminal material of the species Apis mellifera can significantly influence the results of instrumental insemination. The study looked at the influence of the use of diluents in relation to the adhesion, viability, mobility and density of sperm stored in the sperm deposit. The results indicate that the choice of diluent has a relative effect on optimizing the sperm mixing procedure and instrumental insemination

Research on the Productive Performance of Young Rabbit Hybrid Bred in a Household System (II)

To ease the shock of weaning, the young hybrid rabbits were held between the ages of 30 days and 37 days in a farrowing cage and than they were transferred inside growing pens (148/123 cm), where they remained until slaughter. Before slaughter, youth has undergone a finishing process. Youth received treatment with vitamins, coccidiostatics and specific vaccinations. The finishing process began when youth Hybrid reached a body mass of 1700-1900 g and consisted of removal of the ration of grain and vitamins. Youth hybrid was slaughtered to a body weight of 2500 g, weight being achieved between the ages of 107-142 days. Youth consumed between 140.86 to 663.50 g / day juicy fodder, from 806.14 to 1225.82 g / day bulky and concentrated feed. Carcasses of youth hybrid weighed between 1596.70 to 1886.40 g. Slaughter yield ranged from 50.25 to 68.67%. The average price on carcass in young hybrid rabbits, calculated at a price of 17 lei/kg carcass, ranged from 27.10 to 33.40 lei / carcass

The Influence of Climate Change on Behavior of Bee Colonies During Collection in Sunflower

Climate change can have a strong impact on plant development with negative effects on the quantity and quality of secreted nectar and changes in the entire ecosystem. The paper analyzes the implications of the evolution of meteorological factors on the behavior of bee colonies during the collection of nectar and pollen in sunflower. During June and July of the analyzed period 2018-2020, a reduction of the minimum temperature was found, with some nights that registered temperatures unsuitable for nectar secretion (7.6-9.4˚C in July 2018; 8.7-9. 5˚C in July 2019; 10.3-10.4˚C in July 2020) and periods characterized by heavy rains and storms, in a period when, normally, the maximum temperatures negatively influenced the nectar secretion in this plant. The amount of honey made by bee colonies was affected, being necessary to apply supplementary feeds to ensure the reserves for wintering

Research on the Productive Performance of Hybrid Offspring of Rabbits Reared in Household System (I)

In the experiment consisted in using 5 females hybrid which have been mated with 3 male pure-bred. Each couple was monitored for pup and mother body weight and also the consumption of succulent feed, bulky and concentrated. Both parents and offspring were kept in cages made of wood and wire mesh. Under the cages there was a tray of galvanized steel sheet for collecting manure. During the experiment, female New Zealand and the Californian Red hybrid have given birth 4 times, producing 43 cubs (cubs 10.75/birth) and 31 cubs (cubs 7.75/birth). The other 3 females gave birth only once a year. All pups survived until weaning (30 days). Weaned cubs from female New Zealand Red hybrid at time of weaning had a mean body mass of between 341.20 to 602.20 g/cubs, and those from female Californian hybrid were between 374.00 to 803.33 g/cub. At weaning, cubs from female Chinchilla Mare hybrid weighed on average 546.75 g/cub, the ones from the French hybrid female Great Silver weighed 433.00 g/cub, and those from the New Zealand Red primiparous female hybrid weighed784.00 g/weaned cubs. Between the 11th and the 30th day of lactation, most females have lost body weight, the highest being 489.00 g/lactating female