S. Milić, D. Banjac, J. Vasin, Jordana Ninkov, B. Pejić, I. Bajić, B. Mijic
Intensive crop cultivation systems require continuous monitoring of irrigation water quality as well as the control of physical and chemical soil properties. In view of the ongoing climate change and a dramatic decrease in soil organic matter content, the use of low quality irrigation water and its adverse effects on soil, cultivated plants and irrigation equipment must not be overlooked. The aim of this paper was to evaluate general quality of irrigation water from the different water intake sources in the Vojvodina Province. The paper presents the results of irrigation water quality, collected during 2018 and 2019. The research included 140 irrigation water samples obtained from three different intake structures which collect water from wells, canals or reservoirs. Water quality was assessed using the following parameters: pH value, electrical conductivity (EC), total dissolved solids (TDS), ionic balance, sodium adsorption ratio (SAR) and residual sodium carbonate (RSC) value. Water quality diagram given by the US Salinity Laboratory (USSL) and FAO guidelines for interpretation water quality for irrigation was used. Additionally, the Nejgebauer classification for irrigation water, developed specifically for the area of Vojvodina, was used as a third classification. Based on the results of mineralization of the irrigation water, the following values of the observed parameters were determined: average pH of the analyzed water samples were 7.89, ranged from 7.14 to 9.01, while electrical conductivity values ranged from 0.10 to 3.50 dS/m, with an average of 0.85 dS/m. TDS analysis resulted in a wide range of values, from 112 mg/l to 2,384 mg/l, with an average of 529,22 mg/l. SAR values varied between 0.04-16.52 with a satisfactory average of 1.97. The USSL water classification produced similar results as FAO classification and RSC index <0, indicating that 57% of investigating samples are without concerns for irrigation use, whereas Nejgebauers classification and RSC index 0-1.25 show that over 75% of analyzed samples are suitable and safe for irrigation and soil properties. Since the quality of irrigation water significantly affects plant productivity, as it determines the chemical and physical properties of agricultural land, monitoring of water quality for irrigation is of high importance.
{"title":"Assessment of irrigation water quality at the territory of Vojvodina Province (Serbia)","authors":"S. Milić, D. Banjac, J. Vasin, Jordana Ninkov, B. Pejić, I. Bajić, B. Mijic","doi":"10.2298/zmspn2140085m","DOIUrl":"https://doi.org/10.2298/zmspn2140085m","url":null,"abstract":"Intensive crop cultivation systems require continuous monitoring of irrigation water quality as well as the control of physical and chemical soil properties. In view of the ongoing climate change and a dramatic decrease in soil organic matter content, the use of low quality irrigation water and its adverse effects on soil, cultivated plants and irrigation equipment must not be overlooked. The aim of this paper was to evaluate general quality of irrigation water from the different water intake sources in the Vojvodina Province. The paper presents the results of irrigation water quality, collected during 2018 and 2019. The research included 140 irrigation water samples obtained from three different intake structures which collect water from wells, canals or reservoirs. Water quality was assessed using the following parameters: pH value, electrical conductivity (EC), total dissolved solids (TDS), ionic balance, sodium adsorption ratio (SAR) and residual sodium carbonate (RSC) value. Water quality diagram given by the US Salinity Laboratory (USSL) and FAO guidelines for interpretation water quality for irrigation was used. Additionally, the Nejgebauer classification for irrigation water, developed specifically for the area of Vojvodina, was used as a third classification. Based on the results of mineralization of the irrigation water, the following values of the observed parameters were determined: average pH of the analyzed water samples were 7.89, ranged from 7.14 to 9.01, while electrical conductivity values ranged from 0.10 to 3.50 dS/m, with an average of 0.85 dS/m. TDS analysis resulted in a wide range of values, from 112 mg/l to 2,384 mg/l, with an average of 529,22 mg/l. SAR values varied between 0.04-16.52 with a satisfactory average of 1.97. The USSL water classification produced similar results as FAO classification and RSC index <0, indicating that 57% of investigating samples are without concerns for irrigation use, whereas Nejgebauers classification and RSC index 0-1.25 show that over 75% of analyzed samples are suitable and safe for irrigation and soil properties. Since the quality of irrigation water significantly affects plant productivity, as it determines the chemical and physical properties of agricultural land, monitoring of water quality for irrigation is of high importance.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373801","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}
M. Bogavac, Jovana Mišković, Nenad Krsmanovic, M. Rakić, M. Karaman
Multidrug resistance of human isolates of bacteria that cause vaginal infections is one of most recent topics in scientific investigations along with the search for novel antimicrobial drugs originating from nature. Monitoring of antimicrobial activity of traditionally used herbal essential oils may give us basic perspective and directions for future studies design. Antimicrobial activity of commercial essential oil (EO) of Origanum vulgare against human clinical isolates of bacteria and Candida was determined by microdilution method, obtaining minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC) (CLSI protocol). Both investigated strains of Candida as well as all bacterial strains, except P. aeruginosa, showed susceptibility to investigated EO. The most susceptible strain was Gram positive S. aureus1 strain unlike S. aureus2 which indicates strain specificity. Both Gram negative E. coli isolates (E. coli1 and E. coli2) showed resistance to all tested antibiotics in this study, and susceptibility to oregano EO at 12.5 ?l/ml. GC/MS analysis identified a total of 35 components (96.13%) in commercial oregano EO, with the most dominant phenol carvacrol (64.12%). Our data suggest that oregano EO possess potent antimicrobial activity and that human vaginal isolates shows strain specificity in antimicrobial susceptibility.
{"title":"Origanum vulgare L. essential oil effects on microbial pathogens causing vaginitis","authors":"M. Bogavac, Jovana Mišković, Nenad Krsmanovic, M. Rakić, M. Karaman","doi":"10.2298/zmspn2141107b","DOIUrl":"https://doi.org/10.2298/zmspn2141107b","url":null,"abstract":"Multidrug resistance of human isolates of bacteria that cause vaginal infections is one of most recent topics in scientific investigations along with the search for novel antimicrobial drugs originating from nature. Monitoring of antimicrobial activity of traditionally used herbal essential oils may give us basic perspective and directions for future studies design. Antimicrobial activity of commercial essential oil (EO) of Origanum vulgare against human clinical isolates of bacteria and Candida was determined by microdilution method, obtaining minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC) (CLSI protocol). Both investigated strains of Candida as well as all bacterial strains, except P. aeruginosa, showed susceptibility to investigated EO. The most susceptible strain was Gram positive S. aureus1 strain unlike S. aureus2 which indicates strain specificity. Both Gram negative E. coli isolates (E. coli1 and E. coli2) showed resistance to all tested antibiotics in this study, and susceptibility to oregano EO at 12.5 ?l/ml. GC/MS analysis identified a total of 35 components (96.13%) in commercial oregano EO, with the most dominant phenol carvacrol (64.12%). Our data suggest that oregano EO possess potent antimicrobial activity and that human vaginal isolates shows strain specificity in antimicrobial susceptibility.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68374121","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}
The seed accelerated ageing test is one of the most important tests for testing seed vigour, which provides the determination of the degree of preservation for germination and the determination of the duration of the seed storage. The aim of this study was to observe effects of two different production methods (organic and conventional) on seed vigour of soybean cultivar Kaca, by the application of the seed accelerated ageing test. The seeds were exposed to stress conditions for 72 h (temperature of 45?C and air humidity of 100%). After the test was applied, the number of non-germinated seeds of organically produced soybean increased, which resulted in the reduction of the germination percentage. Compared to the standard laboratory method, after the seed accelerated ageing test was applied, the length of the seedling above-ground part (121.63 mm), fresh weight of the seedling above-ground part (8.9 g) and dry weight of the seedling above-ground part (1,05 g) were higher. Moreover, the length (100.25 mm), fresh (1.26 g) and dry weight (0.1 g) of the root were also higher. After the test was applied, the percentage of the off-type seedlings (10.75%) and non-germinated seeds (26%) was higher in conventionally produced soybean seeds, while the length of the seedling above-ground part (100.63 mm), root length (106.75 mm) and root fresh weight (1.39 g) were lower.
{"title":"Effects of production methods on seed vigour of soybean seeds","authors":"Jelena Golijan, D. Jovičić, S. Lekić, M. Sečanski","doi":"10.2298/zmspn2141059g","DOIUrl":"https://doi.org/10.2298/zmspn2141059g","url":null,"abstract":"The seed accelerated ageing test is one of the most important tests for testing seed vigour, which provides the determination of the degree of preservation for germination and the determination of the duration of the seed storage. The aim of this study was to observe effects of two different production methods (organic and conventional) on seed vigour of soybean cultivar Kaca, by the application of the seed accelerated ageing test. The seeds were exposed to stress conditions for 72 h (temperature of 45?C and air humidity of 100%). After the test was applied, the number of non-germinated seeds of organically produced soybean increased, which resulted in the reduction of the germination percentage. Compared to the standard laboratory method, after the seed accelerated ageing test was applied, the length of the seedling above-ground part (121.63 mm), fresh weight of the seedling above-ground part (8.9 g) and dry weight of the seedling above-ground part (1,05 g) were higher. Moreover, the length (100.25 mm), fresh (1.26 g) and dry weight (0.1 g) of the root were also higher. After the test was applied, the percentage of the off-type seedlings (10.75%) and non-germinated seeds (26%) was higher in conventionally produced soybean seeds, while the length of the seedling above-ground part (100.63 mm), root length (106.75 mm) and root fresh weight (1.39 g) were lower.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373774","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}
M. Ćirić, J. Krizmanić, B. Dojčinović, B. Gavrilović, D. Marinković
Alkaline saline ponds and lakes are habitats with unique biodiversity. The green alga of the genus Botryococcus was accidentally discovered during a micro-algal survey of these habitats in Serbia. Species B. terribilis was found and identified for the first time in Serbia in the small sandpit lake of the Rusanda Nature Park. The first sampling was incomplete due to the unknown origin of the orange-red surface scum. After the identity of the species had been confirmed, three additional samplings were conducted aiming to collect phytoplankton and water samples for physical and chemical analyses. Major anions and cations were analysed in order to characterize the chemical type of sandpit lake, as well as nutrient content. Sandpit lake is an alkaline water body that belongs to sodium bicarbonate chemical type. Morphometric analysis of B. terribilis was performed using light and transmission electron microscopy. B. terribilis was found to be numerous in the phytoplankton community in late autumn and winter. Species from the genus Botryococcus are known as a rich source of different lipids and this discovery can be the first step in the further biotechnological application of this species in sustainable biofuel production.
{"title":"Occurrence of Botryococcus terribilis Komárek & Marvan in a small sandpit lake: The first report from Serbia","authors":"M. Ćirić, J. Krizmanić, B. Dojčinović, B. Gavrilović, D. Marinković","doi":"10.2298/zmspn2140045c","DOIUrl":"https://doi.org/10.2298/zmspn2140045c","url":null,"abstract":"Alkaline saline ponds and lakes are habitats with unique biodiversity. The green alga of the genus Botryococcus was accidentally discovered during a micro-algal survey of these habitats in Serbia. Species B. terribilis was found and identified for the first time in Serbia in the small sandpit lake of the Rusanda Nature Park. The first sampling was incomplete due to the unknown origin of the orange-red surface scum. After the identity of the species had been confirmed, three additional samplings were conducted aiming to collect phytoplankton and water samples for physical and chemical analyses. Major anions and cations were analysed in order to characterize the chemical type of sandpit lake, as well as nutrient content. Sandpit lake is an alkaline water body that belongs to sodium bicarbonate chemical type. Morphometric analysis of B. terribilis was performed using light and transmission electron microscopy. B. terribilis was found to be numerous in the phytoplankton community in late autumn and winter. Species from the genus Botryococcus are known as a rich source of different lipids and this discovery can be the first step in the further biotechnological application of this species in sustainable biofuel production.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373478","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}
Gordana Petrović, T. Živanović, R. Stikic, Z. Nikolić, D. Jovičić, G. Tamindžić, D. Milošević
Germination and seedling growth of seven genotypes of field pea (Pisum sativum L.) were studied in PEG-6000 solution having osmotic potentials -0.1 and -0.2 MPa. A study was undertaken to evaluate the influence of different osmotic potentials (MPa) on seed germination percentage (GP) and mean germination time (MGT). Results show that the percentage of germination decreased with a decrease in osmotic potential, while mean germination time increased. Variety Javor is much more sensitive than the other varieties at all levels of osmotic stress. By contrast, the lowest sensitivity of germination and MGT was found in varieties Mraz and Trezor. Seed germination tests at -0.1 to -0.2 MPa have the potential to be used as tests in field pea. Osmotic stress exposure and its duration significantly affected the growth of seedlings (shoot and root) and the accumulation of biomass, while its effect was more prominent on the growth of the shoot than on root growth, which was also confirmed by the root tolerance index.
{"title":"Effects of drought stress on germination and seedling growth of different field pea varieties","authors":"Gordana Petrović, T. Živanović, R. Stikic, Z. Nikolić, D. Jovičić, G. Tamindžić, D. Milošević","doi":"10.2298/zmspn2140059p","DOIUrl":"https://doi.org/10.2298/zmspn2140059p","url":null,"abstract":"Germination and seedling growth of seven genotypes of field pea (Pisum sativum L.) were studied in PEG-6000 solution having osmotic potentials -0.1 and -0.2 MPa. A study was undertaken to evaluate the influence of different osmotic potentials (MPa) on seed germination percentage (GP) and mean germination time (MGT). Results show that the percentage of germination decreased with a decrease in osmotic potential, while mean germination time increased. Variety Javor is much more sensitive than the other varieties at all levels of osmotic stress. By contrast, the lowest sensitivity of germination and MGT was found in varieties Mraz and Trezor. Seed germination tests at -0.1 to -0.2 MPa have the potential to be used as tests in field pea. Osmotic stress exposure and its duration significantly affected the growth of seedlings (shoot and root) and the accumulation of biomass, while its effect was more prominent on the growth of the shoot than on root growth, which was also confirmed by the root tolerance index.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373598","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}
I Aleh Rodzkin, V Euhenia Charnenok, Borivoj Krstic Dj.
The goal of this research is an assessment of the possible use of peatlands biomass and straw for the production of mixed bio-pellets. Peaty soils are a specific type of soils formed as the result of wetlands drainage. Peat mining is completed by the factory if the layer of the peat is less than 1-2 meters and not enough deep for effective mechanical excavation. After the peat excavation is finished, the biggest problem is the use of these lands for other purposes. One of the perspective directions is rewetting of post-mining peatlands to stimulate the growth of common reed, cattail, fescue, sedge, and other grasses which may grow in natural conditions, and also improve conditions for the cultivation of other plants, including trees. The yield of wetland grass in Belarus varies from 8.1 to 14 DM g ha-1 per year. The yield of willow wood can reach 8-10 of DM g ha-1 per year. The highest prime cost of biomass is obtained for willow wood, but it will be lower with the enlargement of the plantation area. Pellets with a high content of wood residues (sawdust) have the best technological parameters including calorific value when compared to pellets from only peat and peat plus straw. Biomass production on degraded peaty soils has also an ecological effect. The cost of carbon quotas on the market varies from 20 to 25 euro per ton, and biomass production can provide additional profit in the case of CO2 emissions trading depending on the biomass content in the fuel.
{"title":"The use of degraded peatlands for biomass production","authors":"I Aleh Rodzkin, V Euhenia Charnenok, Borivoj Krstic Dj.","doi":"10.2298/zmspn2140103r","DOIUrl":"https://doi.org/10.2298/zmspn2140103r","url":null,"abstract":"The goal of this research is an assessment of the possible use of peatlands biomass and straw for the production of mixed bio-pellets. Peaty soils are a specific type of soils formed as the result of wetlands drainage. Peat mining is completed by the factory if the layer of the peat is less than 1-2 meters and not enough deep for effective mechanical excavation. After the peat excavation is finished, the biggest problem is the use of these lands for other purposes. One of the perspective directions is rewetting of post-mining peatlands to stimulate the growth of common reed, cattail, fescue, sedge, and other grasses which may grow in natural conditions, and also improve conditions for the cultivation of other plants, including trees. The yield of wetland grass in Belarus varies from 8.1 to 14 DM g ha-1 per year. The yield of willow wood can reach 8-10 of DM g ha-1 per year. The highest prime cost of biomass is obtained for willow wood, but it will be lower with the enlargement of the plantation area. Pellets with a high content of wood residues (sawdust) have the best technological parameters including calorific value when compared to pellets from only peat and peat plus straw. Biomass production on degraded peaty soils has also an ecological effect. The cost of carbon quotas on the market varies from 20 to 25 euro per ton, and biomass production can provide additional profit in the case of CO2 emissions trading depending on the biomass content in the fuel.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373857","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}
D. Tomanić, Z. Kovačević, D. Stojanovic, B. Belic, N. Stojanac, I. Stančić, I. Galić
Ever since their discovery, antimicrobials have helped in controlling and treating infections in both humans and animals. The control of infectious diseases is endangered by the rise of microorganisms that are resistant to this group of drugs. Limited availability of authorized veterinary drugs leads to prescription of human approved drugs. The aim of our study was to describe metronidazole use patterns and its accordance with scientific literature in Serbia. Results have shown that majority of prescriptions were written to dogs, while 27.1% prescriptions were for cats. Most common general conditions were dental and digestive disorders. Our study shows that metronidazole is available in oral and injectable form, while cats were only treated with injectable formulation. Even though pre?scription of human approved drugs for companion animals is allowed by Law, there is no official record of data on the extent or nature of off-label use in Serbia. Such information is essential for guiding antimicrobial use policy in small animal veterinary practice as well as for assessing the risk of transmission of antimicrobial resistance to humans. Recognizing the importance of antimicrobial resistance and ensuring more judicious use of antibiotics are key elements to any strategy for maintaining the usefulness of antimicrobial drugs in animals and humans.
{"title":"Metronidazole in the prophylaxis and treatment of dogs and cats","authors":"D. Tomanić, Z. Kovačević, D. Stojanovic, B. Belic, N. Stojanac, I. Stančić, I. Galić","doi":"10.2298/zmspn2141095t","DOIUrl":"https://doi.org/10.2298/zmspn2141095t","url":null,"abstract":"Ever since their discovery, antimicrobials have helped in controlling and treating infections in both humans and animals. The control of infectious diseases is endangered by the rise of microorganisms that are resistant to this group of drugs. Limited availability of authorized veterinary drugs leads to prescription of human approved drugs. The aim of our study was to describe metronidazole use patterns and its accordance with scientific literature in Serbia. Results have shown that majority of prescriptions were written to dogs, while 27.1% prescriptions were for cats. Most common general conditions were dental and digestive disorders. Our study shows that metronidazole is available in oral and injectable form, while cats were only treated with injectable formulation. Even though pre?scription of human approved drugs for companion animals is allowed by Law, there is no official record of data on the extent or nature of off-label use in Serbia. Such information is essential for guiding antimicrobial use policy in small animal veterinary practice as well as for assessing the risk of transmission of antimicrobial resistance to humans. Recognizing the importance of antimicrobial resistance and ensuring more judicious use of antibiotics are key elements to any strategy for maintaining the usefulness of antimicrobial drugs in animals and humans.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373702","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}
O. Jakovljevic, Sladjana Popovic, I. Živić, K. Stojanović, J. Krizmanić
Temporal analysis of epilithic diatom community was studied within four seasons per year at five sampling sites in the Mlava River. A trout fish farm was built in the upper part of the river (between the first (ML1) and the second sampling site (ML2)). The highest diversity was noticed in spring (159 diatom taxa), while the lowest in the period of autumn (89). A total number of taxa that were dominant (relative abundance greater than 5% at least at one sampling site) during four seasons was 13. Conspicuous temporal dynamics was shown using canonical correspondence analysis (CCA). Large number of taxa was identified in more than two seasons; some were, however, specific to only one season. Many of them were found only in the winter, while a slightly smaller number of taxa were characteristic only for spring or summer.
{"title":"Temporal dynamics of diatoms in the Mlava River","authors":"O. Jakovljevic, Sladjana Popovic, I. Živić, K. Stojanović, J. Krizmanić","doi":"10.2298/zmspn2141009j","DOIUrl":"https://doi.org/10.2298/zmspn2141009j","url":null,"abstract":"Temporal analysis of epilithic diatom community was studied within four seasons per year at five sampling sites in the Mlava River. A trout fish farm was built in the upper part of the river (between the first (ML1) and the second sampling site (ML2)). The highest diversity was noticed in spring (159 diatom taxa), while the lowest in the period of autumn (89). A total number of taxa that were dominant (relative abundance greater than 5% at least at one sampling site) during four seasons was 13. Conspicuous temporal dynamics was shown using canonical correspondence analysis (CCA). Large number of taxa was identified in more than two seasons; some were, however, specific to only one season. Many of them were found only in the winter, while a slightly smaller number of taxa were characteristic only for spring or summer.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373955","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}
D. Banjac, Jordana Ninkov, S. Milić, S. Jakšić, M. Zivanov, B. Radović, M. Malićanin
Nickel (Ni) is an essential nutrient for animals and it has an important role in many physiological and biochemical processes in higher plants. At the same time, it belongs to the group of potentially toxic elements (PTEs). The aim of this study is to determine Ni concentrations in the soil-plant relationships between the main crops and agricultural land in Central Serbia. A total of 71 bulked soil samples are taken from the topsoil at the depth of 0-30 cm in an area belonging to 6 statistical districts of Central Serbia. A total of 71 seed samples are collected during harvest as an average sample of seed from each observed plot, of which 26 are corn, 19 sunflower, 17 wheat, and 9 soybean samples. Analysis of the collected samples includs the main soil parameters and Ni total and available concentrations in soil, as well as Ni total concentration in seeds. The median value of total Ni concentration in soil is 44.8 mg kg-1, close to MAC. The median nickel concentration in wheat and corn seeds is 0.5 mg kg-1, while soybean and sunflower seeds have higher median Ni content of 8.40 and 10.26 mg kg-1, respectively. Bioaccumulation factors in seeds (BAF) in the present study ranges from 0.013 (corn) to 0.256 (soybean). According to statistically significant differences, all crops have equal total NiT concentration in soil, while the available NiA concentration differs in soils under corn and sunflower cultivars. Based on Ni concentration in seed and BAF, two groups are distinguished ? the group of soybeans and sunflowers with higher Ni content and the group of wheat and corn with lower Ni content in seed. The obtained differences confirm that plant species have a significant role in the bio?accumulation of Ni. The determined BAF parameter is in a statistically significant negative correlation with the total Ni content in soil in all observed crops except maize. However, the BAF parameter for maize alone is in a statistically significant negative correlation with the readily available Ni concentration in the soil. The obtained correlations indicate that higher Ni concentration in soil causes lower Ni concentration in seeds, which might be due to the activation of plant defense mechanism to preserve the reproductive organs ? seeds ? from harmful effects. Based on the obtained results, Ni concentration in seeds of the main field crops in Central Serbia is safe for feed and food usage. Increased content of Ni found in agricultural soils in Central Serbia requires constant monitoring for maintaining sustainable agriculture production.
{"title":"Nickel content in field crop seeds and agricultural soil in Central Serbia","authors":"D. Banjac, Jordana Ninkov, S. Milić, S. Jakšić, M. Zivanov, B. Radović, M. Malićanin","doi":"10.2298/zmspn2141081b","DOIUrl":"https://doi.org/10.2298/zmspn2141081b","url":null,"abstract":"Nickel (Ni) is an essential nutrient for animals and it has an important role in many physiological and biochemical processes in higher plants. At the same time, it belongs to the group of potentially toxic elements (PTEs). The aim of this study is to determine Ni concentrations in the soil-plant relationships between the main crops and agricultural land in Central Serbia. A total of 71 bulked soil samples are taken from the topsoil at the depth of 0-30 cm in an area belonging to 6 statistical districts of Central Serbia. A total of 71 seed samples are collected during harvest as an average sample of seed from each observed plot, of which 26 are corn, 19 sunflower, 17 wheat, and 9 soybean samples. Analysis of the collected samples includs the main soil parameters and Ni total and available concentrations in soil, as well as Ni total concentration in seeds. The median value of total Ni concentration in soil is 44.8 mg kg-1, close to MAC. The median nickel concentration in wheat and corn seeds is 0.5 mg kg-1, while soybean and sunflower seeds have higher median Ni content of 8.40 and 10.26 mg kg-1, respectively. Bioaccumulation factors in seeds (BAF) in the present study ranges from 0.013 (corn) to 0.256 (soybean). According to statistically significant differences, all crops have equal total NiT concentration in soil, while the available NiA concentration differs in soils under corn and sunflower cultivars. Based on Ni concentration in seed and BAF, two groups are distinguished ? the group of soybeans and sunflowers with higher Ni content and the group of wheat and corn with lower Ni content in seed. The obtained differences confirm that plant species have a significant role in the bio?accumulation of Ni. The determined BAF parameter is in a statistically significant negative correlation with the total Ni content in soil in all observed crops except maize. However, the BAF parameter for maize alone is in a statistically significant negative correlation with the readily available Ni concentration in the soil. The obtained correlations indicate that higher Ni concentration in soil causes lower Ni concentration in seeds, which might be due to the activation of plant defense mechanism to preserve the reproductive organs ? seeds ? from harmful effects. Based on the obtained results, Ni concentration in seeds of the main field crops in Central Serbia is safe for feed and food usage. Increased content of Ni found in agricultural soils in Central Serbia requires constant monitoring for maintaining sustainable agriculture production.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68374030","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}
Laetiporus sulphureus BEOFB 1040 has shown the capacity to produce ligninolytic enzymes and consequently degrade eight common agroforestry residues. The highest activities of Mn-dependent and Mn-independent peroxidases (2079.55 U/L and 492.42 U/L, respectively) were detected after treatment of plum and oak sawdust, while laccases synthesis was inhibited by all tested residues. However, despite laccase absence this brown-rot species was not only a good depolymerizer of cellulose and hemicellulose but also an effective delignifier of selected residues. The highest level of lignin content reduction of 43.09% along with high degradation of holocellulose (35.24% of cellulose and 38.42% of hemicellulose) was noted in raspberry sawdust. On the other hand, a selectivity index of even 4.55 was achieved on wheat straw where only 20.27% of lignin was degraded. Consequently, the highest and the lowest dry matter loss (21.25% and 5.83%) were noted on raspberry sawdust and wheat straw, respectively. These results indicate that L. sulphureus BEOFB 1040 is a mushroom with a strong potential for different biotechnological applications and certainly deserves further studies.
{"title":"“Green” approach in utilization of common agroforestry residues by Laetiporus sulphureus enzymes’ cocktail","authors":"Milica Galić, M. Stajić, Jasmina Ćilerdžić","doi":"10.2298/zmspn2141049g","DOIUrl":"https://doi.org/10.2298/zmspn2141049g","url":null,"abstract":"Laetiporus sulphureus BEOFB 1040 has shown the capacity to produce ligninolytic enzymes and consequently degrade eight common agroforestry residues. The highest activities of Mn-dependent and Mn-independent peroxidases (2079.55 U/L and 492.42 U/L, respectively) were detected after treatment of plum and oak sawdust, while laccases synthesis was inhibited by all tested residues. However, despite laccase absence this brown-rot species was not only a good depolymerizer of cellulose and hemicellulose but also an effective delignifier of selected residues. The highest level of lignin content reduction of 43.09% along with high degradation of holocellulose (35.24% of cellulose and 38.42% of hemicellulose) was noted in raspberry sawdust. On the other hand, a selectivity index of even 4.55 was achieved on wheat straw where only 20.27% of lignin was degraded. Consequently, the highest and the lowest dry matter loss (21.25% and 5.83%) were noted on raspberry sawdust and wheat straw, respectively. These results indicate that L. sulphureus BEOFB 1040 is a mushroom with a strong potential for different biotechnological applications and certainly deserves further studies.","PeriodicalId":30148,"journal":{"name":"Zbornik Matice Srpske za Prirodne Nauke","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68373675","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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