scholarly journals About flowering phase of local pear sorts and their wild forms spread in Sheki-Zagatala region

2021 ◽  
pp. 21-23
Author(s):  
Dzhoshgun Israfil ogly Mamedov
Keyword(s):  
Early Spring ◽  
Flowering Period ◽  
Medium Term ◽  
Mass Flowering ◽  
Late Flowering ◽  
Flowering Phase ◽  
National Selection ◽  
Positive Effect ◽  
Pollination And Fertilization

In the article it is informed about typical characteristics of local pear sorts and their wild forms spread in Sheki-Zagatala region of Azerbaijan in flowering phase. During the research it was known that national selection sorts and wild forms of the pear devided into three groups for mass flowering period: quick flowering, medium term flowering, late flowering sorts. It was discovered that quick flowering sorts bloomed late, late flowering sorts bloomed quickly. Early spring months considered risky period of pollination and fertilization because of the changeable weather. Productivity depends on the level of pollination directly. The diversity of beginning and duration period on sort and forms has a positive effect to the productivity in Sheki-Zagatala region.

scholarly journals The Impact of B Corp Certification on Growth

2021 ◽  
Vol 13 (13) ◽  
pp. 7191
Author(s):  
Valerie Paelman ◽  
Philippe Van Cauwenberge ◽  
Heidi Vander Bauwhede
Keyword(s):  
Regression Analysis ◽  
Propensity Score ◽  
Panel Regression ◽  
Medium Term ◽  
Difference In Differences ◽  
Dual Purpose ◽  
Full Effect ◽  
The Impact ◽  
Positive Effect ◽  
Over Time

We empirically test whether B Corp certification affects the short- and medium-term growth rates of sustainable enterprises. These businesses are growing in popularity and prevalence but, due to their hybrid nature, often suffer from external credibility issues and competing internal logics. Because of the rigorous and time-involving audit procedure, B Corp certification potentially sends a credible signal about the sustainable nature of the enterprise to its stakeholders. In addition, the B Corp label could help to straighten out internal tensions and align the company towards its dual purpose. Hence, B Corp certification could contribute to company success. We observe 129 firms that were certified between 2013 and 2018 over a period between six years prior and five years post-certification. Using propensity score matching, we identify 129 non-certified matching companies. On this sample, we conduct a difference-in-differences panel regression analysis to investigate the effect of certification. Our dataset allows us to study how the effects of B Corp certification evolve over time, which was previously untested. Our study documents a positive effect of B Corp certification on turnover growth and also that this effect increases with the time since certification, implying that certification requires some time for its full effect to become apparent.

scholarly journals Foraging Preference of Giant Honeybee, Apis dorsata F., to Selected Horticultural Crops

2006 ◽  
Vol 27 ◽  
pp. 87-92 ◽  
Author(s):  
KR Neupane ◽  
DD Dhakal ◽  
RB Thapa ◽  
DM Gautam
Keyword(s):  
Raphanus Sativus ◽  
Cucurbita Pepo ◽  
Citrus Limon ◽  
Apis Dorsata ◽  
Flowering Period ◽  
Late Flowering ◽  
Horticultural Crops ◽  
Summer Squash ◽  
Foraging Preference ◽  
Bottle Brush

Foraging preference of giant honeybee, Apis dorsata Fab. to selected horticultural crops, litchi, Litchi chinensis Sonner, lemon, Citrus limon (Lin.) Burm. f., bottlebrush, Callistemon citrinus (Curtis) Skeels, cucumber, Cucumis sativus Lin., radish, Raphanus sativus Lin., and summer squash, Cucurbita pepo L., was studied during their blooming time at IAAS, Rampur, Chitwan, Nepal, 2001. The flowering of all six species of experimental plants started in the first week of March and lasted for two months with a peak flowering from 15 March to 5 April. Foraging preference of bees at 7.30, and 11.00 am and 3.00 pm and 5.30 pm during early, mid and late periods of flowering was assessed. Honeybees foraging at different times of day during early, mid and late flowering periods differed significantly. The highest mean number (8.04/min/m2) of A. dorsata workers was recorded on bottle brush flowers at 7.30 am during early flowering period followed by litchi, summer squash and the lowest (0.25/min/m2) on citrus at 5.30 pm during late flowering period. The bees never visited to the flowers of radish and cucumber. Pollen was preferentially collected from bottlebrush, summer squash and citrus in the morning and nectar from litchi and bottlebrush flowers throughout the day. Pollen foragers spent less time (2.9±1 sec/flower) and visited more flowers (17.9±6/min) when bees collected both pollen and nectar from the same plant. The number of outgoing and incoming foragers were the highest (59.0±14, 44.0±15/min/colony) at 7.30 am during mid flowering period and the lowest (17.6±7, 17.0±2/min/colony) at 5.30 pm during late flowering period, respectively. Key words: Foraging preference, Apis dorsata, horticultural crops J. Inst. Agric. Anim. Sci. 27:87-92 (2006)

scholarly journals The role of sexual versus asexual recruitment of <i>Artemisia wudanica</i> in transition zone habitats between inter-dune lowlands and active dunes in Inner Mongolia, China

2016 ◽  
Author(s):  
Yongcui Wang ◽  
Busso Carlos Alberto ◽  
Deming Jiang ◽  
Musa Ala ◽  
Xuehua Li ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Transition Zone ◽  
Asexual Reproduction ◽  
Wind Erosion ◽  
Environmental Parameters ◽  
Northern China ◽  
Early Spring ◽  
Sexual And Asexual Reproduction ◽  
Negative Effect ◽  
Positive Effect

Abstract. Artemisia wudanica is an endemic, perennial, pioneering psammophyte species in the sand dune ecosystems of western Horqin Sand Land in northern China. However, no studies have addressed how sexual and asexual reproduction modes of A. wudanica perform at the transitional zones between active dune inter-dune lowlands and active dunes. In early spring, quadrats were randomly set up in the study area to monitor surviving seedling and/or ramet density and frequency coming from sexual/asexual reproduction of A. wudanica. Iron sticks were also inserted near each quadrat to determine wind erosion (WE) intensity. Additionally, soil samples were collected nearby each quadrat to test for soil moisture (SM) and organic matter (OM) contents, and pH, respectively. Surviving seedlings of A. wudanica showed an inverse response in comparison with ramets to SM, OM and WE. Soil moisture showed the most positive effect, and WE the negative effect, on surviving, sexual reproduction seedlings. Contrarily, WE had the most positive effect, and SM the negative effect, on asexual reproduction ramets. This suggests that increases in SM and decreases in WE should benefit recruitment of A. wudanica seedlings. On the contrary, ramets coming from asexual reproduction showed a different response to environmental factors in transition zone habitats. While SM was not a key constraint for the survival of seedlings, they showed a better, positive response to wind erosion environments. Overall, various study environmental parameters could be improved to foster A. wudanica invasion and settlement in the plant community through different reproductive modes, thereby promoting vegetation restoration and rehabilitation.

scholarly journals Taxon-specific temporal shifts in pollinating insects in mass-flowering crops and field margins in Ireland

2021 ◽  
Vol 28 ◽  
pp. 90-107
Author(s):  
Irene Bottero ◽  
Simon Hodge ◽  
Jane Stout
Keyword(s):  
Agricultural Landscapes ◽  
Floral Resources ◽  
Field Margins ◽  
Flowering Period ◽  
Field Margin ◽  
Mass Flowering ◽  
Insect Abundance ◽  
Insect Pollinators ◽  
Pollinating Insects ◽  
Hover Flies

In intensively cropped agricultural landscapes, the vegetation in edges and hedges (henceforth “field margins”) represents an important semi-natural habitat providing fundamental resources for insect pollinators. We surveyed the pollinating insects associated with two mass-flowering crops, apple and oilseed rape, and compared the insect fauna of the main crop with that in the field margins in the grass-dominated agricultural landscapes of Ireland. Different insect groups responded differently to the presence of the flowering crop, with honey and bumble bees more abundant in crops than margins during crop flowering, but more hover flies and butterflies in margins throughout. The composition of the insect assemblage also shifted over time due to taxon-specific changes in abundance. For example, solitary bees were most abundant early in the season, whereas hover flies peaked, and butterflies declined, in mid-summer. The temporal shift in insect community structure was associated with parallel changes in the field margin flora, and, although we found no relationship between insect abundance and abundance of field margin flowers, Bombus abundance and total insect abundance were positively correlated with floral diversity. After the crop flowering period, floral abundance and diversity was maintained via margin plants, but by late summer, floral resources declined. Our results confirm the importance of field margins for insect pollinators of entomophilous crops set within grass-dominated landscapes, even during the crop flowering period, and provide additional support for agri-environment schemes that protect and/or improve field margin biodiversity. The results also demonstrate that although shifts in insect and plant communities may be linked phenologically there may not always be simple relationships between insect and floral abundance and richness. 

QUANTITATIVE DETERMINATION OF TANNIN IN NETTLE BY SPECTROPHOTOMETRIC AND CHROMATOGRAPHIC METHODS

2021 ◽  
Vol 55 (1 (254)) ◽  
pp. 12-15
Author(s):  
Svetlana H. Apoyan ◽  
Samvel M. Vardapetyan ◽  
Anahit M. Hovhannisyan ◽  
Gohar F. Mkrtchyan
Keyword(s):  
Quantitative Determination ◽  
High Performance ◽  
Chromatographic Method ◽  
High Performance Liquid Chromatographic ◽  
Stinging Nettle ◽  
Mass Flowering ◽  
Maximum Accumulation ◽  
Flowering Phase ◽  
Liquid Chromatographic

The amount of tannins in the leaves of stinging nettle was determined depending on the phenological phase (budding phase, mass flowering phase and fruiting phase). UV spectrophotometric and high performance liquid chromatographic (HPLC) methods were used to quantify tannins in the plant. It was found that the maximum accumulation of this group of substances in nettle leaves occurs in the fruiting phase. Based on the results of the study, the chromatographic method is optimal for the analysis of tannins in nettle leaves.

scholarly journals Peanut Responses to Imposed-Drought Conditions in Southern Ontario

1988 ◽  
Vol 15 (2) ◽  
pp. 85-89 ◽  
Author(s):  
R. C. Roy ◽  
D. P. Stonehouse ◽  
B. Francois ◽  
D. M. Brown
Keyword(s):  
Moisture Stress ◽  
Loamy Sand ◽  
Flowering Period ◽  
Southern Ontario ◽  
Late Flowering ◽  
Yield And Quality ◽  
Period 2 ◽  
Full Flowering ◽  
Drought Conditions ◽  
Short Season

Abstract The effects of moisture stress on Valencia peanut (hypogaea L.) yields were evaluated on Fox loamy-sand soils (Typic Hapudalf or Brunisolic Gray Brown Luvisols); of southwestern Ontario. Drought-imposed irrigation experiments were conducted in 1980 and 1981 by withholding water over all possible combinations of three peanut growth periods, as follows: Period I, early and full flowering; Period 2, late flowering and pod formation; Period 3, pod filling. Generally, the results indicated that the period of late flowering and pod formation is most sensitive to moisture and that moisture stress in growth periods 2 and 3 reduced yields more than stress in periods 1 and 2. Year-to-year variations indicated that, at least in this short-season growing area, factors other than moisture stress alone were influencing peanut yield and quality.

scholarly journals Effect of a puzzle on the process of students' learning about cardiac physiology

2016 ◽  
Vol 40 (3) ◽  
pp. 425-431 ◽  
Author(s):  
Lais Tono Cardozo ◽  
Aline Soares Miranda ◽  
Maria José Costa Sampaio Moura ◽  
Fernanda Klein Marcondes
Keyword(s):  
Cardiac Cycle ◽  
Lower Number ◽  
Control Group ◽  
Cardiac Physiology ◽  
Medium Term ◽  
Short Term ◽  
Class 1 ◽  
Formed Part ◽  
Physiology Students ◽  
Positive Effect

The aim of the present study was to evaluate the effects of using a puzzle to learn about cardiac physiology. Students were divided into control and game groups. In class 1, the control group had a 2-h theoretical class about cardiac physiology, including a detailed description of the phases of the cardiac cycle, whereas the game group had a 50-min theoretical class without the description of the cardiac cycle. In class 2, the control group did an assessment exercise before an activity with the cardiac puzzle and the game group answered questions after the above-mentioned activity. While solving the puzzle, the students had to describe the cardiac cycle by relating the concepts of heart morphology and physiology. To evaluate short-term learning, the number of wrong answers and grades in the assessment exercise were compared between the control and game groups. To evaluate medium-term learning, we compared the grades obtained by students of the control and game groups in questions about cardiac physiology that formed part of the academic exam. In the assessment exercise, the game group presented a lower number of errors and higher score compared with the control group. In the academic exam, applied after both groups had used the puzzle, there was no difference in the scores obtained by the control and game groups in questions about cardiac physiology. These results showed a positive effect of the puzzle on students' learning about cardiac physiology compared with those not using the puzzle.

scholarly journals Medium-term effect of fertilizer, compost, and dolomite on cocoa soil and productivity in Sulawesi, Indonesia

2021 ◽  
pp. 1-18
Author(s):  
Thomas Fungenzi ◽  
Ruben Sakrabani ◽  
Paul J. Burgess ◽  
Smilja Lambert ◽  
Peter McMahon
Keyword(s):  
Water Availability ◽  
Management Practices ◽  
C:N Ratio ◽  
Organic Amendments ◽  
Term Effect ◽  
Medium Term ◽  
Future Studies ◽  
South Sulawesi ◽  
Physical Changes ◽  
Positive Effect

Abstract In Indonesia, management practices that reduce soil fertility could be limiting cocoa (Theobroma cacao L.) production. To address this, we investigated the effects of fertilizers and organic amendments comprising different combinations of NPK + urea, dolomite, and manure-based compost on soil properties and cocoa productivity. We extended an existing field experiment in South Sulawesi, Indonesia, to assess these treatments’ effects on cocoa trees from the age of 2.9 years to 7.4 years. The treatments were first applied 5 months after planting and subsequently twice a year. Soil analyses were performed before planting, after 3 years, and finally after 7 years. Productivity was assessed yearly between the age of 3.5 and 7.4 years. The highest yields were obtained from the plots receiving compost, although the yield benefits diminished over time. Inorganic fertilizer alone doubled the yield compared to the control, while the yields with compost and compost + fertilizer were three times that of the control. With dolomite alone, the yield cumulated over 4 years was 41% higher than the control. The positive effect of compost on cocoa yields can potentially be attributed to (1) physical changes increasing soil water availability, (2) the chemical improvement of nutrient availability, and (3) biologically, by promoting the activity of beneficial organisms. The application of dolomite increased soil pH, Ca, and Mg contents. Soil organic carbon greatly declined in the composted treatments, even though 10 kg of compost was applied per tree per year, probably because of the low C:N ratio of the compost. Future studies should assess different fertilizer formulations and combinations with organic inputs and explore the mechanisms by which compost promotes cocoa productivity.

scholarly journals COMPARATIVE PHARMACOGNOSTIC RESEARCH OF CENTAUREA SCABIOSA L. WILD-GROWING AND CULTI-VATED IN THE CONDITIONS OF TOMSK

2020 ◽  
pp. 119-126
Author(s):  
Il'ya Petrovich Kaminskii ◽  
Tatiana Vladimirovna Kadyrova ◽  
Galina Ilinichna Kalinkina ◽  
Maria Sergeevna Larkina ◽  
Elena Vasilievna Ermilova ◽  
...  
Keyword(s):  
Raw Materials ◽  
Sesquiterpene Lactones ◽  
Maximum Amount ◽  
Cultivated Plants ◽  
Additional Source ◽  
Mass Flowering ◽  
Vegetative Organs ◽  
Flowering Phase ◽  
Beginning Of Flowering ◽  
Flowering Onset

The purpose of this study is: on the basis of a comparative study of the biological characteristics and chemical composition of Centaurea scabiosa L. wild-growing and cultivated, to assess the prospects for its introduction into culture as an additional source of raw materials for the anthelmintic drug development. It has been established that the Centaurea scabiosa L. cultivated under the conditions of the Tomsk city in terms of developmental phenology is close to a wild-growing plant. The vegetative organs ratios of wild-growing and cultivated plants were determined: leaves constitute 10% and 24%; baskets – 37% and 24%; stems up to 0.5 cm of thick –18% and 20%; stems with a thickness of more than 0.5 cm – 34% and 31%, respectively (beginning of flowering phase). The cultivated Centaurea scabiosa L. is comparable to a wild-growing plant according to the sesquiterpene lactones content in separated organs. The sesquiterpene lactones maximum amount accumulates in the budding phase, decreases slightly at the beginning of flowering, and significantly decreases at the mass flowering phase. The Centaurea scabiosa L. harvesting periods (the leafiest shoots with a stem diameter of not more than 0.5 cm) are experimentally substantiated – the phase of flowering onset.

scholarly journals Colecția genului Spiraea L., în Grădina Botanică Națională (Institut) “Alexandru Ciubotaru”

2021 ◽  
Author(s):  
Tatiana Tanachi ◽  
◽  
Ion Rosca ◽  
Elisaveta Onica ◽  
Alina Cutcovschii-Mustuc ◽  
...  
Keyword(s):  
New Taxa ◽  
Small Groups ◽  
Growing Season ◽  
Early Spring ◽  
Early Summer ◽  
Special Care ◽  
Appropriate Technology ◽  
Flowering Period ◽  
Shape And Size

Fourteen new taxa have been added to the collection of the genus Spiraea L. The researched new taxa are resistant to drought, frost, pollutants and do not need special care, they only need pruning to ob-tain the desired shape and the observance of the appropriate technology throughout the growing season. The researched shrubs are particularly beautiful in early spring due to their abundant flowering and the attractive diverse colours of the flowers (white, pink, red, red-purple), the abundance of flowering and the long flowering period, but also in early summer – due to the colour of the foliage, the shape and size of the plants. It is recommended for use in landscaping, preferably in the foreground in small groups, together with oth-er species at the edges of stands and for hedges of different heights.

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