Contribution Concerning the Behaviour Knowledge before Natural Swarming in Honeybees (Apis mellifera carpathica, Linnaeus)

In this study we followed the way in which evolves the behaviour of some honeybee families (Apis mellifera carpathica, Linnaeus), maintained in vertical beehives (modified Dadant type), in conditions of stationary bee keeping, having in view the natural queen cell’s build rhythm after the second acacia tree harvest (Robinia pseudoacacia L.) in Jucu area of Cluj County. There were taken into observation 20 biological units with queen bees of different ages. It was monitored the development rhythm of natural queen cells, which are in attendance by the working bees, and to put into evidence the swarming instinct strength, so in bee keeping practice to be known and to be avoided the natural swarming. The determination of occupied surfaces with covered brood and larval was effected with the Netz framework. The aim of our study was to understand how the swarming in honeybees occurs. By detailed observation, we want to describe and to explain the behaviour of honeybees before the swarming process. The obtained results are quantified in absolute values and expressed graphically in relative values, but in the next three apicultural years (2020, 2021 and 2022), the experiment will be repeated for a variance analysis, which will provide a statistical assurance. We hope that these data will give contribution for the apicultural practice, keeping attention on queen bees’ importance during active season and on careful supervision on development rhythm of the honeybee units during the natural swarming.

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Nitrogen and Phosphorus Resorption in Relation to Nutrition Limitation along the Chronosequence of Black Locust (Robinia pseudoacacia L.) Plantation

Forests ◽

10.3390/f10030261 ◽

2019 ◽

Vol 10 (3) ◽

pp. 261 ◽

Cited By ~ 4

Author(s):

Jian Deng ◽

Sha Wang ◽

Chengjie Ren ◽

Wei Zhang ◽

Fazhu Zhao ◽

...

Keyword(s):

Black Locust ◽

Robinia Pseudoacacia ◽

Nutrient Utilization ◽

Stand Age ◽

Nitrogen And Phosphorus ◽

C:N:P Stoichiometry ◽

Green Leaves ◽

Different Ages ◽

Robinia Pseudoacacia L ◽

Senesced Leaves

Plant nitrogen (N) and phosphorus (P) resorption is an important strategy to conserve N and P in the face of nutrient limitation. However, little is known about the variation of N and P resorption efficiency (NRE and PRE) and their correlation with leaves and soil C:N:P stoichiometry in black locust forests (Robinia pseudoacacia L.) of different ages. In this study, we measured C, N, and P concentrations in soil, green leaves, and senesced leaves from black locust forests of different ages (i.e, 10-, 20-, 30-, 36-, and 45-year-old), and calculated the NRE, PRE, and C:N:P stoichiometry ratios. The NRE and PRE tended to increase and then decrease with stand age, ranging from 46.8% to 57.4% and from 37.4% to 58.5%, with averages of 52.61 and 51.89, respectively. The PRE:NRE decreased with increased stand ages. The C:P and N:P of soil and green leaves increased with stand ages, indicating the increase of P limitation. In the senesced leaves, C:P and N:P were lower than in green leaves and first increased and then decreased with stand age. The PRE was significantly negatively correlated with the C:P and N:P of soil and green leaves. The NRE was significantly correlated with the C concentration of green leaves, P of the senesced leaves, and C:N. Results suggested that the NRE and PRE responded differently to soil and plant nutrients in black locust forests of different ages. In addition, the black locust plantations would alter the conservation and use strategy of nutrients in the ecosystem through a plant-mediated pathway. Future studies should elucidate the central nutrient utilization strategy of black locust in response to a nutrient-poor environment and determine how it is involved in regulating nutrient resorption.

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Characterisation of Antimicrobial Properties of Extracts of Selected Medicinal Plants

Polish Journal of Microbiology ◽

10.5604/01.3001.0010.7002 ◽

2017 ◽

Vol 66 (4) ◽

pp. 463-472 ◽

Cited By ~ 9

Author(s):

Monika Cioch ◽

Paweł Satora ◽

Magdalena Skotniczny ◽

Dorota Semik-Szczurak ◽

Tomasz Tarko

Keyword(s):

Antimicrobial Activity ◽

Inhibitory Concentration ◽

Robinia Pseudoacacia ◽

Antimicrobial Properties ◽

Positive Control ◽

Diffusion Method ◽

Yeast Saccharomyces Cerevisiae ◽

Robinia Pseudoacacia L ◽

Polyphenolic Profile

The scope of the experiments included analysis of the antimicrobial activity of ethanolic, methanolic and aqueous extracts against bacterial and fungal cultures and determination of the minimum inhibitory concentration of plant extracts tested microbial growth. Analysis of the antifungal and antibacterial activity was carried out by the disc diffusion method using paper discs. In the experiment 11 species of microorganisms – 8 bacterial and 3 fungal strains were used. The highest antimicrobial activity against the tested strains was demonstrated by black elder (Sambucus nigra L.), black locust (Robinia pseudoacacia L.) and lingonberry (Vaccinium vitis-idaea L.) extracts. The study showed the diverse morphological activity of specific parts of elderberry and quince, which is the effect of different polyphenolic profile of these plants. The yeast Saccharomyces cerevisiae, Escherichia coli, Pseudomonas putida and Bacillus subtilis showed the highest sensitivity to the effect of extracts of the analysed plants. As a positive control three antibiotics – amphotericin B, vancomycin and amoxicillin with clavulanic acid were used.

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Chemical Composition and Selected Energy Properties of Black Locust Bark (Robinia pseudoacacia L.)

Agricultural Engineering ◽

10.1515/agriceng-2016-0033 ◽

2016 ◽

Vol 20 (2) ◽

pp. 117-124

Author(s):

Artur Kraszkiewicz

Keyword(s):

Black Locust ◽

Robinia Pseudoacacia ◽

Chemical Properties ◽

Calorific Value ◽

Average Density ◽

Ash Content ◽

Poplar Wood ◽

Average Value ◽

Robinia Pseudoacacia L

AbstractThe objective of the paper was to assess the usefulness of bark of black locust trunks as an energy source based on chemical and energy properties. Material for research was collected from five forest stands of black locust (Robinia pseudoacacia L.). After determination of the bark mass, its participation in the mass of trees, the content of moisture in bark, density, calorific value, ash, content of C, H, N, S, K and P were established. In comparison to wood, bark has worse chemical properties on account of a high content of sulphur and nitrogen. In the conditions of research, black locust bark had an average density of approx. 400 kg·m−3 which is comparable to the willow and poplar wood. Average calorific value of black locust bark was by 10% higher than the average value of this parameter for bark wood.

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IgE-vermittelte Allergie gegen Robinienholz (Robinia pseudoacacia L.) – eine Fallbeschreibung

Pneumologie ◽

10.1055/s-2004-835954 ◽

2004 ◽

Vol 58 (11) ◽

Author(s):

S Kespohl ◽

R Merget ◽

M Gellert ◽

T Brüning ◽

M Raulf-Heimsoth

Keyword(s):

Robinia Pseudoacacia ◽

Robinia Pseudoacacia L

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ASSESSMENT OF HONEYBEE DRONES BREED IN THE CHUVASH REPUBLIC

АГРАРНЫЙ ВЕСТНИК ВЕРХНЕВОЛЖЬЯ ◽

10.35523/2307-5872-2019-28-3-65-73 ◽

2019 ◽

Keyword(s):

Apis Mellifera ◽

Raw Material ◽

Forest Steppe ◽

Sample Collection ◽

Annual Increase ◽

Queen Bees ◽

Binocular Microscope ◽

Chuvash Republic ◽

Regional Programs ◽

Natural Honey

One of the most important aspects of endemic populations conservation of modern honeybee breeds of is study in the field of drones morphological features identification in the apiaries, as the assessment of Queen bees’ purity breed and the potential for recovery of the populations. In this regard, studies of the honeybee drones’ breed in the Chuvash Republic (Chuvashia) are relevant and have scientific and prac-tical value. The raw material was a sample collection of drones (126000 pcs. from 4200 of the bee fami-lies) from 21 districts, which are covering all natural honey gathering zones of the Chuvash Republic: forest-steppe, forest and steppe. Three characteristics are identified: colour of the hairs on a scale of Gotze, cubital index and the length of the proboscis. The binocular microscope MBS-10 was used in the work. In the process of research, biogenetic potential of the Chuvash population of Central Russian breed (Apis mellifera mellifera) is established, in the conditions of hybridization, with the observed trend of an annual increase. Five subpopulation structures or administrative districts (Morgaushsky, Kras-noarmeysky, Krasnochetaysky, Shumerlinsky and Batyrevsky) are registered, where, the territory of "pure" breeding is stored and gradually created thanks to the selection-breeding works. The obtained re-sults prove the effectiveness of implemented local and regional programs and activities of breeding and distribution of Central Russian breed bees in the Chuvash Republic.

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Productivity and Environmental Role of Forest Shelterbelts of Robinia pseudoacacia L. of the Kuban Lowland

Lesnoy Zhurnal (Forestry Journal) ◽

10.37482/0536-1036-2020-6-88-97 ◽

2020 ◽

pp. 88-97

Author(s):

V.V. Tanyukevich ◽

◽

S.V. Tyurin ◽

D.V. Khmeleva ◽

A.A. Kvasha ◽

...

Keyword(s):

Agricultural Land ◽

Land Reclamation ◽

Poa Pratensis ◽

Robinia Pseudoacacia ◽

Average Height ◽

Middle Aged ◽

Aboveground Phytomass ◽

Robinia Pseudoacacia L ◽

Young Growth

Works on protective afforestation are carried out in order to protect agricultural land from degradation processes, as well as to improve the microclimate of land. The research purpose is to study the bioproductivity and environmental role of Robinia pseudoacacia L. forest shelterbelts in the conditions of the Kuban lowland. The approved and generally accepted methods of forest valuation, forest land reclamation, botany, and mathematical statistics were applied. Plantings were created according to the standard technology for the steppe zone of the Russian Federation. The area of forest shelterbelts is 62.4 ths ha, including 5 % of the young growth (I state class), 80 % of middle-aged forest plantings (II state class), 10 % of maturing plantings (II state class), 5 % of mature and overmature plantings (III state class). Living ground cover is formed by the following species: Koeleria pyramidata L., Poa pratensis L., Festuca pratensis H., Elytrígia repens L., Dactylis glomerata L., and Phlum pratense L. Aboveground phytomass is 100–300 g/m2; height is 25–32 cm. Plantings are characterized by the quality classes: young growth – I and II; middle-aged and maturing – III; mature and overmature – IV. At the age of natural maturity (70 years), the Robinia trunk reaches the average height of 15.1 m with the average diameter of 22.1 cm. The total stock of wood reaches 18, (ths m3), including (ths m3): young growth – 68 (ths m3); middleaged plantings – 14,871 (ths m3); maturing plantings – 2,187 (ths m3); mature and overmature plantings – 1,314 (ths m3). Aboveground phytomass in young growth is 20.2 t/ha; in mature and overmature plantings it is 391.2 t/ha. In the region it is estimated at 17,070 ths t, including (ths t): young growth – 64; middle-aged plantings – 13,753; maturing plantings – 2,032; mature and overmature plantings – 1,221. The share of stem mass reaches 84.5–80.8 %; woody greenery – 4.2–1.5 %; branches – 11.3–17.7 %. Recalculation coefficients of the stock into aboveground phytomass are the following for: young growth – 0.936; mature and overmature forest shelterbelts – 0.929. Phytosaturation of forest shelterbelts varies within 0.314–2.474 kg/m3. Forest shelterbelts have accumulated 8,534 ths t of carbon, which is estimated at 145.1 mln dollars. The sphere of application of the research results is the Krasnodar Krai forestry, which is recommended to create an additional 60 ths ha of forest shelterbelts, which will provide a normative protective forest cover of arable land of 5 % and annual carbon sequestration up to 3.4 t/ha.

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Regulation of stand density alters forest structure and soil moisture during afforestation with Robinia pseudoacacia L. and Pinus tabulaeformis Carr. On the Loess Plateau

Forest Ecology and Management ◽

10.1016/j.foreco.2021.119196 ◽

2021 ◽

Vol 491 ◽

pp. 119196

Author(s):

Xi Wei ◽

Wenjun Liang

Keyword(s):

Soil Moisture ◽

Loess Plateau ◽

Forest Structure ◽

Robinia Pseudoacacia ◽

Stand Density ◽

Pinus Tabulaeformis ◽

The Loess Plateau ◽

Pinus Tabulaeformis Carr ◽

Robinia Pseudoacacia L

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Rock-Solubilizing Microbial Inoculums Have Enormous Potential as Ecological Remediation Agents to Promote Plant Growth

Forests ◽

10.3390/f12030357 ◽

2021 ◽

Vol 12 (3) ◽

pp. 357

Author(s):

Zhaohui Jia ◽

Miaojing Meng ◽

Chong Li ◽

Bo Zhang ◽

Lu Zhai ◽

...

Keyword(s):

Plant Growth ◽

Leaf Area ◽

Ecological Restoration ◽

Root Nodules ◽

Robinia Pseudoacacia ◽

Growth Index ◽

Nodule Formation ◽

Bare Rock ◽

Mining Sites ◽

Robinia Pseudoacacia L

Anthropogenic overexploitation poses significant threats to the ecosystems that surround mining sites, which also have tremendous negative impacts on human health and society safety. The technological capacity of the ecological restoration of mine sites is imminent, however, it remains a challenge to sustain the green restorative effects of ecological reconstruction. As a promising and environmentally friendly method, the use of microbial technologies to improve existing ecological restoration strategies have shown to be effective. Nonetheless, research into the mechanisms and influences of rock-solubilizing microbial inoculums on plant growth is negligible and the lack of this knowledge inhibits the broader application of this technology. We compared the effects of rock-solubilizing microbial inoculums on two plant species. The results revealed that rock-solubilizing microbial inoculums significantly increased the number of nodules and the total nodule volume of Robinia pseudoacacia L. but not of Lespedeza bicolor Turcz. The reason of the opposite reactions is possibly because the growth of R. pseudoacacia was significantly correlated with nodule formation, whereas L. bicolor’s growth index was more closely related to soil characteristics and if soil nitrogen content was sufficient to support its growth. Further, we found that soil sucrase activity contributed the most to the height of R. pseudoacacia, and the total volume of root nodules contributed most to its ground diameter and leaf area. Differently, we found a high contribution of total soil carbon to seedling height and ground diameter of L. bicolor, and the soil phosphatase activity contributed the most to the L. bicolor’ s leaf area. Our work suggests that the addition of rock-solubilizing microbial inoculums can enhance the supply capacity of soil nutrients and the ability of plants to take up nutrients for the promotion of plant growth. Altogether, our study provides technical support for the practical application of rock-solubilizing microbes on bare rock in the future.

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