Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.011
M. Drabek, P. Syrovátka
This article focuses on the differentiated estimations of industry multipliers in relation to Price-Book Value ratio (P/BV) with applying for the Czech brewing industry. Differentiation of estimates brings better approximation of these sector-wide multipliers to the defined groups companies within the given markets and thus increases the accuracy of the method of relative business valuation. Due to the absence of market data on privately held companies, the market value was assessed using the DCF method, while the book value was taken from the enterprise's accounts. The assumption of the linearity of the market-book value relationship for the subsequent calculations and differentiation of P/BV estimations was verified using regression analysis. The differentiation of P/BV ratio was made according to the size of entities, but mainly based on equality of market and book value, respectively according to the equality P/BV = 1. Then our results were supplemented by the calculation of industry P/BV ratio using P/EAT ratio and ROE decomposition. Using this additional method, the brewing industry was compared with other relevant industries in the Czech Republic.
{"title":"Differentiated Estimates of Valuation Multipliers based on Price-to-Book Ratio for the Czech Brewing Industry","authors":"M. Drabek, P. Syrovátka","doi":"10.11118/actaun.2022.011","DOIUrl":"https://doi.org/10.11118/actaun.2022.011","url":null,"abstract":"This article focuses on the differentiated estimations of industry multipliers in relation to Price-Book Value ratio (P/BV) with applying for the Czech brewing industry. Differentiation of estimates brings better approximation of these sector-wide multipliers to the defined groups companies within the given markets and thus increases the accuracy of the method of relative business valuation. Due to the absence of market data on privately held companies, the market value was assessed using the DCF method, while the book value was taken from the enterprise's accounts. The assumption of the linearity of the market-book value relationship for the subsequent calculations and differentiation of P/BV estimations was verified using regression analysis. The differentiation of P/BV ratio was made according to the size of entities, but mainly based on equality of market and book value, respectively according to the equality P/BV = 1. Then our results were supplemented by the calculation of industry P/BV ratio using P/EAT ratio and ROE decomposition. Using this additional method, the brewing industry was compared with other relevant industries in the Czech Republic.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42044824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.014
S. Derevianko, A. Vasylchenko, V. Kaplunenko, Maxym Kharchuk, O. Demchenko, M. Spivak
According to the results of the study, the threshold limit values (TLVs) of CeO 2 , and Ce nanoparticles (NPs) for the culture of swine kidney embryonic cell line (SKECL) have been estimated. The TLVs are 0.1 μg/cm 3 for Ce NPs, and 1 μg/cm 3 for CeO 2 NPs. All NPs were non-toxic for white mice at concentration of 2000 mg/kg, which opens up a perspective for the further use of these NPs in the development of antiviral substances. CeO 2 , and Ce NPs have decreased the titer of Teschovirus by 1.46–2 lg 10 TCD 50 / cm 3 at TLVs at all stages of virus reproduction. Sensitivity of the strain Dniprovskyi-34 of species Teschovirus A, serotype Porcine teschovirus 1 (PTV-1), to solvents, proteolytic enzyme trypsin under the presence of CeO 2 , and Ce NPs has been studied. Under the presence of solvents, and trypsin, NPs decreased the infectious titer of the virus slightly by only 0.23 lg 10 TCD 50 /cm 3 . CeO 2 , and Ce NPs have not shown antiviral activity under heating to 50 ° C, either with the addition of 1 M solution of MgCl 2 or without it, and did not cause significant decrease of infectious activity of the virus under pH values 2.0, 7.2, and 11.0 within 10 minutes exposition. Ability of CeO 2 , and Ce NPs to interact with viral particles, change their morphology, which can affect infective activity of the virus significantly, has been shown. Addition of CeO 2 , and Ce NPs to the antigen has caused the decrease of the titer of virus-neutralizing antibodies, though it remained high. The results of the studies can be used in development of disinfectants, and antiviral drugs. strain of Teschovirus of Porcine teschovirus -1 serotype under the influence of CeO 2 , and Ce NPs according to prophylactic, therapeutic, and virucidal plots been studied in experiments using SKECL cell culture. It was found that according to the prophylactic plot CeO 2 , and Ce NPs have caused a decrease in the virus titer by 2.0 lg TCD 50 /cm 3 , according to the treatment plot - by 1.5 lg TCD 50 /cm 3 . CeO 2 and Ce NPs have reduced the virus titer by 1.46, and 2.0 lg TCD 50 /cm 3 , respectively, according to virucidal plot.
根据研究结果，对猪肾胚胎细胞系（SKECL）培养的CeO2和Ce纳米粒子的阈值（TLV）进行了估算。Ce NPs和CeO2 NPs的TLV分别为0.1μg/cm3和1μg/cm3。在2000 mg/kg的浓度下，所有NP对小白鼠都是无毒的，这为这些NP在抗病毒物质的开发中的进一步应用开辟了前景。在病毒繁殖的所有阶段，CeO2和Ce-NPs在TLV处使Teschovirus的滴度降低了1.46–2 lg 10 TCD 50/cm3。研究了在CeO2和Ce-NPs存在下，猪特氏病毒1型（PTV-1）的特氏病毒A株Dniprovskyi-34对溶剂、蛋白水解酶胰蛋白酶的敏感性。在溶剂和胰蛋白酶存在下，NPs仅使病毒的感染滴度略微降低0.23 lg 10 TCD 50/cm3。CeO2和Ce-NPs在加热至50°C下，无论添加还是不添加1M MgCl2溶液，都没有显示出抗病毒活性，并且在暴露10分钟内，在pH值2.0、7.2和11.0下，病毒的感染活性没有显著降低。CeO2和Ce-NPs与病毒颗粒相互作用、改变其形态的能力已被证明，这可以显著影响病毒的感染活性。向抗原中添加CeO2和Ce-NPs导致病毒中和抗体的滴度降低，尽管其仍然很高。研究结果可用于消毒剂和抗病毒药物的开发。在SKECL细胞培养的实验中，研究了在CeO2和Ce-NPs的影响下，根据预防、治疗和杀毒图的猪破伤风病毒-1血清型的毒株。结果发现，根据预防图，CeO2和Ce-NPs使病毒滴度降低了2.0 lg TCD 50/cm3，根据治疗图，降低了1.5 lg TCD 50/cm3。根据杀毒图，CeO2和Ce-NPs分别使病毒滴度降低了1.46和2.0 lg TCD 50/cm3。
{"title":"Antiviral Properties of Cerium Nanoparticles","authors":"S. Derevianko, A. Vasylchenko, V. Kaplunenko, Maxym Kharchuk, O. Demchenko, M. Spivak","doi":"10.11118/actaun.2022.014","DOIUrl":"https://doi.org/10.11118/actaun.2022.014","url":null,"abstract":"According to the results of the study, the threshold limit values (TLVs) of CeO 2 , and Ce nanoparticles (NPs) for the culture of swine kidney embryonic cell line (SKECL) have been estimated. The TLVs are 0.1 μg/cm 3 for Ce NPs, and 1 μg/cm 3 for CeO 2 NPs. All NPs were non-toxic for white mice at concentration of 2000 mg/kg, which opens up a perspective for the further use of these NPs in the development of antiviral substances. CeO 2 , and Ce NPs have decreased the titer of Teschovirus by 1.46–2 lg 10 TCD 50 / cm 3 at TLVs at all stages of virus reproduction. Sensitivity of the strain Dniprovskyi-34 of species Teschovirus A, serotype Porcine teschovirus 1 (PTV-1), to solvents, proteolytic enzyme trypsin under the presence of CeO 2 , and Ce NPs has been studied. Under the presence of solvents, and trypsin, NPs decreased the infectious titer of the virus slightly by only 0.23 lg 10 TCD 50 /cm 3 . CeO 2 , and Ce NPs have not shown antiviral activity under heating to 50 ° C, either with the addition of 1 M solution of MgCl 2 or without it, and did not cause significant decrease of infectious activity of the virus under pH values 2.0, 7.2, and 11.0 within 10 minutes exposition. Ability of CeO 2 , and Ce NPs to interact with viral particles, change their morphology, which can affect infective activity of the virus significantly, has been shown. Addition of CeO 2 , and Ce NPs to the antigen has caused the decrease of the titer of virus-neutralizing antibodies, though it remained high. The results of the studies can be used in development of disinfectants, and antiviral drugs. strain of Teschovirus of Porcine teschovirus -1 serotype under the influence of CeO 2 , and Ce NPs according to prophylactic, therapeutic, and virucidal plots been studied in experiments using SKECL cell culture. It was found that according to the prophylactic plot CeO 2 , and Ce NPs have caused a decrease in the virus titer by 2.0 lg TCD 50 /cm 3 , according to the treatment plot - by 1.5 lg TCD 50 /cm 3 . CeO 2 and Ce NPs have reduced the virus titer by 1.46, and 2.0 lg TCD 50 /cm 3 , respectively, according to virucidal plot.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48017360","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.019
Amal El Khaddari, Amina El Ouazzani Touhami, Soumaya El Gabardi, Jalila Aoujdad, Mohammed Ouajdi, B. Kerdouh, Salwa El Antry, A. Douira, J. Dahmani
In Morocco, Tetraclinis articulata is one of the species of great socio-economic value. Improving the resistance and survival of thuya to sometimes extreme environmental conditions is a concern of managers. For this, the use of arbuscular mycorrhizal fungi can promote the good growth of this species. We aim to study the effect of a native endomycorrhizal inoculum on the growth of T. articulata plants under nursery conditions. Our results showed that after eighteen months of inoculation, there was a significant effect on the growth of the mycorrhizal plants as compared to the non-mycorrhizal plants. Concerning the root fresh weight (8.58 g), the root system length (34 cm), the collar diameter (5.44 mm), and the number of branches (27) of the mycorrhizal plants are higher than those observed in the non-mycorrhizal plants, 7.67 g, 30 cm, 4.13 mm, and 24, respectively. However, the results of the height and the fresh weight of the shoot part of the non-mycorrhizal plant are superior to those observed in the mycorrhizal plants. The number of spores formed in the rhizosphere of plants inoculated was 135/100 g of soil. And they were represented by 29 endomycorrhizal species belonging to ten different genera: Glomus (6 species), Acaulospora (8 species), Rhizophagus (3 species), Diversispora (1 species), Funneliformis (3 species), Septoglomus (2 species), Scutellospora (2 species), Claroideoglomus (1 species), Entrophospora (1 species) and Gigaspora (2 species). Diversispora versiformis is the most abundant species; its frequency of occurrence reached 30%. The results of this inoculation study highlight the importance of native endomycorrhizal fungi isolated from the rhizosphere of Aderj in increasing the root system and improving the growth of T. articulata plants.
{"title":"Impact Of Inoculation by Native Endomycorrhizal Fungi Associated with Tetraclinis Articulata on Plant Growth and Mycorrhizal Diversity in the Forest Nursery","authors":"Amal El Khaddari, Amina El Ouazzani Touhami, Soumaya El Gabardi, Jalila Aoujdad, Mohammed Ouajdi, B. Kerdouh, Salwa El Antry, A. Douira, J. Dahmani","doi":"10.11118/actaun.2022.019","DOIUrl":"https://doi.org/10.11118/actaun.2022.019","url":null,"abstract":"In Morocco, Tetraclinis articulata is one of the species of great socio-economic value. Improving the resistance and survival of thuya to sometimes extreme environmental conditions is a concern of managers. For this, the use of arbuscular mycorrhizal fungi can promote the good growth of this species. We aim to study the effect of a native endomycorrhizal inoculum on the growth of T. articulata plants under nursery conditions. Our results showed that after eighteen months of inoculation, there was a significant effect on the growth of the mycorrhizal plants as compared to the non-mycorrhizal plants. Concerning the root fresh weight (8.58 g), the root system length (34 cm), the collar diameter (5.44 mm), and the number of branches (27) of the mycorrhizal plants are higher than those observed in the non-mycorrhizal plants, 7.67 g, 30 cm, 4.13 mm, and 24, respectively. However, the results of the height and the fresh weight of the shoot part of the non-mycorrhizal plant are superior to those observed in the mycorrhizal plants. The number of spores formed in the rhizosphere of plants inoculated was 135/100 g of soil. And they were represented by 29 endomycorrhizal species belonging to ten different genera: Glomus (6 species), Acaulospora (8 species), Rhizophagus (3 species), Diversispora (1 species), Funneliformis (3 species), Septoglomus (2 species), Scutellospora (2 species), Claroideoglomus (1 species), Entrophospora (1 species) and Gigaspora (2 species). Diversispora versiformis is the most abundant species; its frequency of occurrence reached 30%. The results of this inoculation study highlight the importance of native endomycorrhizal fungi isolated from the rhizosphere of Aderj in increasing the root system and improving the growth of T. articulata plants.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48785015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.012
F. Hasanov, Elchin Suleymanov, H. Aliyeva, Hezi Eynalov, Sa’d Shannak
The development of the agricultural sector is essential for any economy, including Azerbaijan, the largest economy in the South Caucasus, as it plays an important role in food security, rural development, and environmental protection. For Azerbaijan, as an oil-dependent economy, it is also important for diversification of the non-oil sector. For this reason, the Azerbaijani government has adopted several programs and materialized massive investments to promote agricultural growth. This study examines the role of the production factors in the development of the sector using annual time series data for the period 1995–2017. Econometric analysis, mainly Autometrics - a cutting edge machine learning modeling algorithm- with super saturation, and Growth Accounting lead us to conclude that: (i) land, labor, and capital have statistically significant positive long-run impacts on agriculture output; (ii) the growth of the sector and the contributions of land and capital formation slowed down sharply, while the contributions of total factor productivity (TFP) and labor increased in 2009–2017 compared to the pre-2009 period; (iii) in the pre-2009 period, the sector's growth was hugely contributed by capital followed by TFP, labor and land; (iv) in 2009–2017 period, TFP followed by capital and labor contributed to the sector's growth, while the contribution of land was negative. The results are robust to different econometric methods and specifications. Overall, policymakers are recommended to consider that value-added and other key indicators of agriculture have grown less in 2009–2017 period compared to the pre-2009 period, given that one should expect more growth in the former period as numerous government programs and massive investments were materialized. They may also consider that the contributions of labor and land were quite small and negative, respectively. Lastly, policies leading to TFP growth should be supported.
{"title":"What Drives the Agricultural Growth in Azerbaijan? Insights from Autometrics with Super Saturation","authors":"F. Hasanov, Elchin Suleymanov, H. Aliyeva, Hezi Eynalov, Sa’d Shannak","doi":"10.11118/actaun.2022.012","DOIUrl":"https://doi.org/10.11118/actaun.2022.012","url":null,"abstract":"The development of the agricultural sector is essential for any economy, including Azerbaijan, the largest economy in the South Caucasus, as it plays an important role in food security, rural development, and environmental protection. For Azerbaijan, as an oil-dependent economy, it is also important for diversification of the non-oil sector. For this reason, the Azerbaijani government has adopted several programs and materialized massive investments to promote agricultural growth. This study examines the role of the production factors in the development of the sector using annual time series data for the period 1995–2017. Econometric analysis, mainly Autometrics - a cutting edge machine learning modeling algorithm- with super saturation, and Growth Accounting lead us to conclude that: (i) land, labor, and capital have statistically significant positive long-run impacts on agriculture output; (ii) the growth of the sector and the contributions of land and capital formation slowed down sharply, while the contributions of total factor productivity (TFP) and labor increased in 2009–2017 compared to the pre-2009 period; (iii) in the pre-2009 period, the sector's growth was hugely contributed by capital followed by TFP, labor and land; (iv) in 2009–2017 period, TFP followed by capital and labor contributed to the sector's growth, while the contribution of land was negative. The results are robust to different econometric methods and specifications. Overall, policymakers are recommended to consider that value-added and other key indicators of agriculture have grown less in 2009–2017 period compared to the pre-2009 period, given that one should expect more growth in the former period as numerous government programs and massive investments were materialized. They may also consider that the contributions of labor and land were quite small and negative, respectively. Lastly, policies leading to TFP growth should be supported.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":"13 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41293527","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.017
T. Atmowidi, Luthfika Canta, Selly Sahara Hasibuan, Ni Wayan Sri Utari, Dorly Dorly, T. S. Prawasti
Stingless bees (Apidae: Meliponinae) are eusocial insects that distributed in the tropics and subtropics. Stingless bees are pollinators for various plant species. Foraging activities of worker stingless bees collect pollens, nectar, resin or water as nutrients for individuals and colony needed. This study aimed to measures pollen load and pollen composition carried by four species of stingless bees, i.e., Tetragonula laeviceps , Lepidotrigona terminata , Heterotrigona itama , and Geniotrigona thoracica in urban area at Bogor, Indonesia. Acetolysis method was used for pollens preparation and pollens were counted by using hemacytometer under light microscope embedded with camera. The study showed that the highest pollen load occurred in H. itama (59181 pollen grains), followed by L. terminata (27806 pollen grains), T. laeviceps (20816 pollen grains), and G. thoracica (11775 pollen grains). The number of pollens collected by T. laeviceps, L. terminata , and H. itama positively correlated with body size. Thirteen types of pollen were identified on the body of stingless bees. Pollen composition collected by T. laeviceps were dominated by Chlorantaceae (50%) and Polygonaceae (20%), L. terminata and H. itama were dominated by Asteraceae (70.19% and 62.76%) and Arecaceae (22.87% and 29.65%), while in G. thoracica was dominated by Apocynaceae (53.53%) and Acanthaceae (34.32%). Lepidotrigona terminata and H. itama carried of small pollen-size and G. thoracica carried moderate pollen-size.
{"title":"The Pollen Load on Stingless Bees (Apidae: Meliponinae) Foraged in Urban Area","authors":"T. Atmowidi, Luthfika Canta, Selly Sahara Hasibuan, Ni Wayan Sri Utari, Dorly Dorly, T. S. Prawasti","doi":"10.11118/actaun.2022.017","DOIUrl":"https://doi.org/10.11118/actaun.2022.017","url":null,"abstract":"Stingless bees (Apidae: Meliponinae) are eusocial insects that distributed in the tropics and subtropics. Stingless bees are pollinators for various plant species. Foraging activities of worker stingless bees collect pollens, nectar, resin or water as nutrients for individuals and colony needed. This study aimed to measures pollen load and pollen composition carried by four species of stingless bees, i.e., Tetragonula laeviceps , Lepidotrigona terminata , Heterotrigona itama , and Geniotrigona thoracica in urban area at Bogor, Indonesia. Acetolysis method was used for pollens preparation and pollens were counted by using hemacytometer under light microscope embedded with camera. The study showed that the highest pollen load occurred in H. itama (59181 pollen grains), followed by L. terminata (27806 pollen grains), T. laeviceps (20816 pollen grains), and G. thoracica (11775 pollen grains). The number of pollens collected by T. laeviceps, L. terminata , and H. itama positively correlated with body size. Thirteen types of pollen were identified on the body of stingless bees. Pollen composition collected by T. laeviceps were dominated by Chlorantaceae (50%) and Polygonaceae (20%), L. terminata and H. itama were dominated by Asteraceae (70.19% and 62.76%) and Arecaceae (22.87% and 29.65%), while in G. thoracica was dominated by Apocynaceae (53.53%) and Acanthaceae (34.32%). Lepidotrigona terminata and H. itama carried of small pollen-size and G. thoracica carried moderate pollen-size.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41700606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.018
L. Hájková, M. Mozny, Veronika Oušková, Petra Dížková, L. Bartošová, Z. Žalud
Strength and direction of the potential effect of climate change on walnuts is regionally specific (Gauthier and Jacobs, 2011) as climate change will probably affect the spatial distribution of the walnut. This paper evaluated the long-term phenological series (1961–2012) of the beginning of flowering, end of flowering and duration of flowering in walnut tree ( Juglans regia ) at two phenological stations located in different geographical locations of the Czech Republic but in the same climatic conditions (warm region). Phenological stages were analyzed in relation to growing degree days and to spring frosts occurrence. Onset of the beginning and end of flowering occurred earlier at Velké Pavlovice station (-2.1 and -1.3 days), and conversely occurred later at Doksany station (+1.8 and +1.0). Period of flowering shortened at Doksany station (-0.8 day) and prolonged at Velké Pavlovice station (+1.2 day). The occurrence of days with minimum air temperature < 0 °C during walnut tree flowering was more frequent at Doksany station (in total, 29 days) with absolute minimum value -5.5 °C. At Velké Pavlovice station 5 days with minimum air temperature below 0 °C were found during examined period with absolute minimum value -3.8 °C. The negative trend in number of frost days occurrence during flowering period was found at both stations. Pearson correlation coefficient between phenophase onset (and flowering period) and sums of growing degree days was stronger at Velké Pavlovice station, and the highest value was between period of flowering and temperature sums (0.782). The results confirmed our hypothesis of changes in phenophase onsets and duration of flowering including spring frosts occurrence according to west-east gradient (maritime climate-continental climate).
{"title":"Evaluation of Walnut Tree Flowering and Frost Occurrence Probability During 1961-2012","authors":"L. Hájková, M. Mozny, Veronika Oušková, Petra Dížková, L. Bartošová, Z. Žalud","doi":"10.11118/actaun.2022.018","DOIUrl":"https://doi.org/10.11118/actaun.2022.018","url":null,"abstract":"Strength and direction of the potential effect of climate change on walnuts is regionally specific (Gauthier and Jacobs, 2011) as climate change will probably affect the spatial distribution of the walnut. This paper evaluated the long-term phenological series (1961–2012) of the beginning of flowering, end of flowering and duration of flowering in walnut tree ( Juglans regia ) at two phenological stations located in different geographical locations of the Czech Republic but in the same climatic conditions (warm region). Phenological stages were analyzed in relation to growing degree days and to spring frosts occurrence. Onset of the beginning and end of flowering occurred earlier at Velké Pavlovice station (-2.1 and -1.3 days), and conversely occurred later at Doksany station (+1.8 and +1.0). Period of flowering shortened at Doksany station (-0.8 day) and prolonged at Velké Pavlovice station (+1.2 day). The occurrence of days with minimum air temperature < 0 °C during walnut tree flowering was more frequent at Doksany station (in total, 29 days) with absolute minimum value -5.5 °C. At Velké Pavlovice station 5 days with minimum air temperature below 0 °C were found during examined period with absolute minimum value -3.8 °C. The negative trend in number of frost days occurrence during flowering period was found at both stations. Pearson correlation coefficient between phenophase onset (and flowering period) and sums of growing degree days was stronger at Velké Pavlovice station, and the highest value was between period of flowering and temperature sums (0.782). The results confirmed our hypothesis of changes in phenophase onsets and duration of flowering including spring frosts occurrence according to west-east gradient (maritime climate-continental climate).","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46741940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.016
Kartika Marta Djakaria, T. Atmowidi, W. Priawandiputra
Insect pollination has been reported to have a better yield quality and quantity than artificial pollination. Wild bees, including stingless bees contribute to effective and efficient pollination on okra ( Abelmoschus esculentus L.: Malvaceae). However, previously no report about okra pollination by native Indonesian stingless bees, which can be potential as pollinators. Therefore, this research aims to compare foraging activities of three species of stingless bees ( Heterotrigona itama , Tetragonula laeviceps, and T. clypearis ) on okra plants and fruits quality and quantity parameters among four pollination treatments (three stingless bee species and without pollinator). Four cages with 50 okra plants were used for pollination treatments. The foraging observation of different stingless bee species on okra was conducted in the cages, and the okra yield from each treatment was compared. Our results showed the foraging activities of three stingless bee species were higher in the morning than those in the afternoon. In the morning, the number of visits of T. clypearis and T. laeviceps were negatively correlated with visit duration. The current study also showed that size and weight of pod, the number of seeds, and the percentage of fruit set of okra were enhanced by pollination of three stingless bee species. Unfortunately, the pollination of stingless bee species did not affect the seed germination and flavonoid content of fruits. The native of Indonesian stingless bees are good pollinators to improve pod quality and quantity.
{"title":"The Foraging Activity and Pollination Services of Three Stingless Bee Species to Enhance Fruit Quality and Quantity of Okra (Abelmoschus Esculentus L.)","authors":"Kartika Marta Djakaria, T. Atmowidi, W. Priawandiputra","doi":"10.11118/actaun.2022.016","DOIUrl":"https://doi.org/10.11118/actaun.2022.016","url":null,"abstract":"Insect pollination has been reported to have a better yield quality and quantity than artificial pollination. Wild bees, including stingless bees contribute to effective and efficient pollination on okra ( Abelmoschus esculentus L.: Malvaceae). However, previously no report about okra pollination by native Indonesian stingless bees, which can be potential as pollinators. Therefore, this research aims to compare foraging activities of three species of stingless bees ( Heterotrigona itama , Tetragonula laeviceps, and T. clypearis ) on okra plants and fruits quality and quantity parameters among four pollination treatments (three stingless bee species and without pollinator). Four cages with 50 okra plants were used for pollination treatments. The foraging observation of different stingless bee species on okra was conducted in the cages, and the okra yield from each treatment was compared. Our results showed the foraging activities of three stingless bee species were higher in the morning than those in the afternoon. In the morning, the number of visits of T. clypearis and T. laeviceps were negatively correlated with visit duration. The current study also showed that size and weight of pod, the number of seeds, and the percentage of fruit set of okra were enhanced by pollination of three stingless bee species. Unfortunately, the pollination of stingless bee species did not affect the seed germination and flavonoid content of fruits. The native of Indonesian stingless bees are good pollinators to improve pod quality and quantity.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47573029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-07-01DOI: 10.11118/actaun.2022.015
D. Modrý, B. Červená, B. Pafčo, Ilona Pšenková, Kamil Malát, J. Ježková, P. Václavek
Dynamic changes in the farming practices, growing numbers of beef farmers and geographic distribution of beef cattle herds in the Czech Republic impact on helminth parasites of cattle and vice versa. We summarize in a brief form results of parasitological examination of samples collected by farmers from range of beef cattle farms across the whole Czech Republic in order to provide baseline data for parasite control and to report occurrence of an invasive rumen fluke Calicophoron daubneyi in the country.
{"title":"Results of Parasitological Monitoring of Beef Cattle Herds in the Czech Republic, With First Description of the Occurrence of Invasive Rumen Fluke Calicophoron daubneyi in Beef Herds","authors":"D. Modrý, B. Červená, B. Pafčo, Ilona Pšenková, Kamil Malát, J. Ježková, P. Václavek","doi":"10.11118/actaun.2022.015","DOIUrl":"https://doi.org/10.11118/actaun.2022.015","url":null,"abstract":"Dynamic changes in the farming practices, growing numbers of beef farmers and geographic distribution of beef cattle herds in the Czech Republic impact on helminth parasites of cattle and vice versa. We summarize in a brief form results of parasitological examination of samples collected by farmers from range of beef cattle farms across the whole Czech Republic in order to provide baseline data for parasite control and to report occurrence of an invasive rumen fluke Calicophoron daubneyi in the country.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48485103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-01DOI: 10.11118/actaun.2022.010
E. Afrida, Koko Tampubolon
The deficiency of primary macronutrients can inhibit the vegetative growth of the plants. The study aimed to obtain the influence of nutrient omission techniques fertilization (NOTF) on the agronomic characteristics, nutrient uptake and to determine the growth limiting factors for maize. This research was located on the farmer field in Padang Bulan, Medan Baru, North Sumatra, Indonesia, from December 2020 to March 2021. This research was applied the Randomized Block Design within the single factor through NOTF that has been converted (urea: superphosphate: KCl = 0.15: 0.10: 0.025 g kg -1 ). The treatment using F0 = control; F1 = N + P + K; F2 = P + K; F3 = N + K; F4 = N + P within three replications. The parameters were processed using ANOVA and continued by a Duncan Multiple Range Test (DMRT) at P < 0.05. The F1–F4 treatments significantly increased plant height, number of leaves, leaf area, fresh weight of root and shoot, and dry weight of root and shoot for maize. It was found in the highest plant height, the number of leaves, and the dry weight of root at the N + P fertilization. However, the N + P + K fertilization increased leaf area, fresh weight, and dry weight of shoot. It showed the highest concentration and uptake nutrient of total-N, total-P, and total-K. The novelty of this study found the limiting factor that inhibited the maize growth was the non-fertilization of nitrogen.
初级宏量营养素缺乏会抑制植物的营养生长。本研究旨在了解营养遗漏技术施肥(NOTF)对玉米农艺性状、养分吸收的影响，确定玉米生长限制因素。该研究于2020年12月至2021年3月在印度尼西亚北苏门答腊岛棉兰巴鲁的巴东Bulan农民田间进行。本研究采用单因素随机区组设计，通过NOTF转化(尿素:过磷酸钙:氯化钾= 0.15:0.10:0.025 g kg -1)。处理采用F0 =对照;F1 = n + p + k;F2 = p + k;F3 = n + k;3次重复F4 = N + P。参数采用方差分析处理，并继续采用Duncan多元极差检验(DMRT)， P < 0.05。F1-F4处理显著提高了玉米株高、叶片数、叶面积、根冠鲜重和根冠干重。施氮+ P处理后的最高株高、叶片数和根系干重均有显著差异。N + P + K处理增加了地上部叶面积、鲜重和干重。全氮、全磷和全钾的浓度和养分吸收量最高。本研究的新颖之处在于发现不施氮是抑制玉米生长的限制因素。
{"title":"Limiting Factors of Agronomic Characteristics for Maize Through Nutrient Omission Techniques","authors":"E. Afrida, Koko Tampubolon","doi":"10.11118/actaun.2022.010","DOIUrl":"https://doi.org/10.11118/actaun.2022.010","url":null,"abstract":"The deficiency of primary macronutrients can inhibit the vegetative growth of the plants. The study aimed to obtain the influence of nutrient omission techniques fertilization (NOTF) on the agronomic characteristics, nutrient uptake and to determine the growth limiting factors for maize. This research was located on the farmer field in Padang Bulan, Medan Baru, North Sumatra, Indonesia, from December 2020 to March 2021. This research was applied the Randomized Block Design within the single factor through NOTF that has been converted (urea: superphosphate: KCl = 0.15: 0.10: 0.025 g kg -1 ). The treatment using F0 = control; F1 = N + P + K; F2 = P + K; F3 = N + K; F4 = N + P within three replications. The parameters were processed using ANOVA and continued by a Duncan Multiple Range Test (DMRT) at P < 0.05. The F1–F4 treatments significantly increased plant height, number of leaves, leaf area, fresh weight of root and shoot, and dry weight of root and shoot for maize. It was found in the highest plant height, the number of leaves, and the dry weight of root at the N + P fertilization. However, the N + P + K fertilization increased leaf area, fresh weight, and dry weight of shoot. It showed the highest concentration and uptake nutrient of total-N, total-P, and total-K. The novelty of this study found the limiting factor that inhibited the maize growth was the non-fertilization of nitrogen.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48543878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-05-01DOI: 10.11118/actaun.2022.009
F. Gregor, H. Šefrová, A. Laštůvka, Z. Laštůvka
Species independence of Phyllonorycter cerris (Gregor, 1952) is evidenced by differences in coloration, results of molecular analysis, and trophic specialization. The differences between P. cerris and P. quercifoliella (Zeller, 1839) lie in the basic appearance of the forewings, and in the location and shape of some strigulae. The genetic distance (COI) between Phyllonorycter cerris and P. quercifoliella is 2.5%. The larva of Phyllonorycter cerris mines only Quercus cerris L. in central Europe, P. quercifoliella mines oligophagously Quercus spp. of the section Robur Reich. Phyllonorycter cerris is redescribed, data on biology, population densities, and distribution are added. Occurrence in Czechia is analysed in detail, the first precise faunistic data from Bohemia are given.
{"title":"Phyllonorycter cerris (Gregor), Taxonomy, Biology and Distribution (Lepidoptera: Gracillariidae)","authors":"F. Gregor, H. Šefrová, A. Laštůvka, Z. Laštůvka","doi":"10.11118/actaun.2022.009","DOIUrl":"https://doi.org/10.11118/actaun.2022.009","url":null,"abstract":"Species independence of Phyllonorycter cerris (Gregor, 1952) is evidenced by differences in coloration, results of molecular analysis, and trophic specialization. The differences between P. cerris and P. quercifoliella (Zeller, 1839) lie in the basic appearance of the forewings, and in the location and shape of some strigulae. The genetic distance (COI) between Phyllonorycter cerris and P. quercifoliella is 2.5%. The larva of Phyllonorycter cerris mines only Quercus cerris L. in central Europe, P. quercifoliella mines oligophagously Quercus spp. of the section Robur Reich. Phyllonorycter cerris is redescribed, data on biology, population densities, and distribution are added. Occurrence in Czechia is analysed in detail, the first precise faunistic data from Bohemia are given.","PeriodicalId":7174,"journal":{"name":"Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41991778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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