scholarly journals Effect of hail net on the water potential of an apple orchard

2020 ◽  
pp. 109-113
Author(s):  
Andrea Szabó ◽  
Kinga Kubicza ◽  
János Tamás ◽  
Attila Nagy

 Apple production has seen a decline in yields in recent years, primarily due to ecological factors such as drought, water stress, water scarcity, uneven rainfall distribution, frost damage and hail damage. Ecological factors that are harmful to the plant can be eliminated by human intervention, irrigation or the use of hail net. In our study, we investigated the positive effects of hail net on the development of plant water potential as the vegetation progressed, in non-irrigation area with temperature and humidity. Water potential values were determined using a field osmometer. Confirmed the positive effect of the ice protection net in the apple orchard of Early Gold and Golden Reinders. Our results were supported by statistical analyzes our results.

2016 ◽  
Vol 28 (2) ◽  
pp. 125-135 ◽  
Author(s):  
Grzegorz P. Łysiak ◽  
Robert Kurlus ◽  
Anna Michalska

Abstract The aim of this research was the evaluation of whether the application of 5-ALA, which has potential as a plant growth stimulating agent with indirect anti-stress activity, can limit the damage caused by low temperatures in winter. The research was conducted on frost-sensitive apple cultivars for three years in an orchard and in a laboratory. During the vegetative seasons of each year, the trees of three apple cultivars (‘Golden Delicious’, ‘Gala’ and ‘Šampion’) were subject to 5-ALA foliar application. Three times during each winter following the field application, apple shoots were taken to the laboratory and frozen at −20°C, −25°C and −30°C. After incubation, the damage to the sensitive parts of the shoots was evaluated. The application had a positive effect on the frost resistance of all cultivars, most often at the end of dormancy, which is especially noteworthy because frost damage occurs most frequently during this period. Positive effects of the application were found in most of the experiment combinations of cultivar, year, freezing date and shoot part. Additionally, the positive influence of 5-ALA application on frost resistance was found to increase with each year of the research.


1975 ◽  
Vol 5 (1) ◽  
pp. 90-96 ◽  
Author(s):  
W. J. Davies ◽  
T. T. Kozlowski

Fraxinusamericana and Pinusresinosa seedlings were treated with 7.5% silicone or 10−4 M ABA. Plants were watered on the day following treatment and then subjected to a soil drying cycle. At frequent intervals after the compounds were applied, transpiration, net photosynthesis, leaf water potential, and soil moisture percentage were determined for treated and control plants. Transpiration and photosynthesis of control plants decreased as the soil dried. Silicone was more effective than ABA in reducing water loss of both species, and was much more effective on Pinus than on Fraxinus. Although silicone had a very positive effect on the water potential of Pinus, photosynthesis of treated plants was greatly reduced with rates of treated plants never exceeding those of control plants. As the drying cycle progressed rates of photosynthesis were higher in ABA-treated Pinus plants than in controls. ABA also significantly increased plant water potential and soil moisture percentage. In Fraxinus, as the drying cycle progressed, both ABA- and silicone-treated plants had lower water stresses than untreated plants. Rates of photosynthesis were higher than in untreated plants. The data indicated that film-forming antitranspirants may be unsuitable for use with some gymnosperms, and that compounds which very significantly decrease transpiration are not necessarily useful and practical in the long term.


2019 ◽  
Vol 3 (4) ◽  
pp. 209-222
Author(s):  
Philipp K. Görs ◽  
Henning Hummert ◽  
Anne Traum ◽  
Friedemann W. Nerdinger

Digitalization is a megatrend, but there is relatively little knowledge about its consequences for service work in general and specifically in knowledge-intensive business services (KIBS). We studied the impact of digitalization on psychological consequences for employees in tax consultancies as a special case of KIBS. We compare two tax consulting jobs with very different job demands, those of tax consultants (TCs) and assistant tax consultants (ATCs). The results show that the extent of digitalization at the workplace level for ATCs correlates significantly positively with their job satisfaction. For TCs, the same variable correlates positively with their work engagement. These positive effects of digitalization are mediated in the case of ATCs by the impact on important job characteristics. In the case of TCs, which already have very good working conditions, the impact is mediated by the positive effect on self-efficacy. Theoretical and practical consequences of these results are discussed.


2021 ◽  
Vol 13 (15) ◽  
pp. 8633
Author(s):  
Yuhan Ge ◽  
Qing Yuan ◽  
Yaxi Wang ◽  
Keunsoo Park

In today’s increasingly competitive coffee industry, the point of running a good coffee shop is no longer to run a coffee and beverage shop simply, but to focus on the quality of service and the value that customers feel as a result. Previous studies have mainly discussed the customer satisfaction and behavioral intention of restaurants, while few studies have explored the influencing factors of customer satisfaction and behavioral intention of chain coffee shops. Given that the perceived service quality theory and DINESERV model can effectively predict customer satisfaction and behavioral intention, this study took 385 consumers in the first Starbucks Reserve flagship store in China as survey objects. SmartPLS 3.0 software was used to explore the relationship among respondents’ perceived service quality, customer perceived value, satisfaction, and behavioral intention. The results show that service quality has a partially significant positive effect on perceived value. Perceived service quality and customers’ perceived value both have significant positive effects on satisfaction. Customers’ satisfaction has a significant positive effect on their behavioral intention. These results indicate that enterprises should strengthen the emotional bond between consumers and enterprises and improve the reliability, assurance, and empathy of perceived service quality to create a better emotional resonance between consumers and the Starbucks brand to improve customer satisfaction. At the same time, it should also promote the symbolic perceived value of Chinese consumers to Starbucks to realize the sustainable development of coffee-shop operation and consumer repurchase. This study expands the research on the service quality, perceived value, and behavioral intention of coffee chain enterprises in the context of non-habitual coffee-drinking countries. Moreover, it provides case support for the operation and research of regional cultural consumption habits of international catering chain enterprises.


2021 ◽  
Vol 13 (2) ◽  
pp. 579
Author(s):  
Caroline Reimann ◽  
Fernando Carvalho ◽  
Marcelo Duarte

The present investigation aims study the sustainability of the business model of the Portuguese SMEs operating in the B2B International market analyzing the influence of dynamic marketing capabilities and adaptive marketing capabilities in their international marketing performance. It will also analyze the moderating effects of Competitive Intensity within this international scenario. A quantitative study was developed, using a questionnaire as a research method. In total, 335 valid responses were collected from Portuguese SMEs in June 2020. To test the hypotheses, multiple hierarchical regressions were performed. As for the analyzes involving Competitive Intensity environments, namely low and high intensity, dummies were developed to evaluate the different effects produced by the capacities in the International Marketing Performance. This study shows the positive impact of the dynamic marketing capabilities and adaptive marketing capabilities on the international marketing performance of the surveyed companies, essentially from the product development management, supply chain management, vigilant market learning and open marketing. when in a low competitive intensity environment only dynamic marketing capabilities had a positive effect on performance, but in a high, competitive, intensity environment both dynamic marketing capabilities and adaptive marketing capabilities showed positive effects in relation to performance. This study innovates by bringing international marketing, through two marketing capacities, from the perspective of SMEs that perform B2B activities.


Animals ◽  
2019 ◽  
Vol 9 (12) ◽  
pp. 1132
Author(s):  
Sarah Schwarzkopf ◽  
Asako Kinoshita ◽  
Jeannette Kluess ◽  
Susanne Kersten ◽  
Ulrich Meyer ◽  
...  

Development of calves depends on prenatal and postnatal conditions. Primiparous cows were still maturing during pregnancy, which can lead to negative intrauterine conditions and affect the calf’s metabolism. It is hypothesized that weaning calves at higher maturity has positive effects due to reduced metabolic stress. We aimed to evaluate effects of mothers’ parity and calves’ weaning age on growth performance and blood metabolites. Fifty-nine female Holstein calves (38.8 ± 5.3 kg birth weight, about 8 days old) were used in a 2 × 2 factorial experiment with factors weaning age (7 vs. 17 weeks) and parity of mother (primiparous vs. multiparous cows). Calves were randomly assigned one of these four groups. Live weight, live weight gain and morphometry increased over time and were greater in calves weaned later. Metabolic indicators except total protein were interactively affected by time and weaning age. Leptin remained low in early-weaned calves born to primiparous cows, while it increased in the other groups. The results suggest that weaning more mature calves has a positive effect on body growth, and calves born to primiparous cows particularly benefit from this weaning regimen. It also enables a smooth transition from liquid to solid feed, which might reduce the associated stress of weaning.


2010 ◽  
Author(s):  
Vasu Udompetaikul ◽  
Shrini K Upadhyaya ◽  
David C Slaughter ◽  
Bruce D Lampinen

2012 ◽  
Vol 26 (5) ◽  
pp. 381-391 ◽  
Author(s):  
Paolo Cattapan ◽  
Mariacarmela Passarelli ◽  
Michele Petrone

This paper contributes to the literature on innovation brokerage by analysing the effects of brokerage activities on the innovation and growth of small and medium-sized enterprises (SMEs). The authors provide a detailed description of the Technology Transfer Service (TTS), credited as a European best-practice innovation broker, at Area Science Park in Italy. They then carry out an exploratory econometric analysis, the results of which show that the support provided by the TTS enables research–industry collaboration and has positive effects on product and process innovation in SMEs, but it appears not to affect the generation of new patents in SMEs. The results also suggest that the growth in innovation enabled by the support of TTS has a positive effect on the SMEs' revenue growth and job creation. However the innovation broker is more effective in relation to larger firms than it is for micro-enterprises.


Author(s):  
I. O. Pasichna ◽  
V. I. Vdovychenko

The recent scientific researches provide evidence of the important role of microbiota for human health. The microbiome is a very complex system, that exists in an equilibrium state and performs multiple functions. The intestinal microflora is disturbed under the influence of iatrogenic factors, and products of microbial origin are used to correct this. The first group of such drugs include probiotics. Their positive effect is associated with immunological and non‑immunological effects. The results of many studies proved the positive effects of probiotics in clinical practice, however publications of recent years outline their low effectiveness and transient nature of the effect, even with prolonged use. Another group of preparations refers to prebiotics, which selectively stimulate the growth of colon microflora. A combination of probiotics and prebiotics, called synbiotics, also in use. Currently, much attention is paid to metabiotics. This group includes various low molecular weight molecules with various chemical manifestations. The components of metabiotics are cellular elements, metabolites and signaling molecules of probiotic cultures. Metabiotics provide the optimal conditions of homeostasis in the contact zone, which are necessary for the normal interaction of the epithelium and microflora, as well as directly affect the physiological functions and biochemical reactions of the macroorganism. The antibacterial properties of metabiotics allow to fight pathogenic and opportunistic flora, without affecting the beneficial microorganisms of the intestine. Creation of targeted metabiotics is a novel promising direction in this area. The possibility of creating a programmed metabiotic drug is considered, depending on the type of disorders of the intestinal microbiocenosis and the peculiarities of the life of specific pathogenic or opportunistic strains.


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