Pub Date : 2019-10-02DOI: 10.19137/semiarida.2019(01).33-41
M. Alende, G. Lascano, T. Jenkins, J. Andrae
El objetivo de este experimento fue evaluar los efectos de la adicion de fructosa cristalina y urea a una dieta basada en raigras anual sobre la sintesis de proteina microbiana, la fermentacion y la digestibilidad de los nutrientes, usando fermentadores de flujo continuo. Se usaron seis fermentadores de flujo continuo en un arreglo factorial 3x2, con tres niveles de hidratos de carbono solubles (WSC) obtenidos por la adicion de fructosa cristalina (21, 24 y 27 g.100 g MS1; LWSC, MWSC y HWSC, respectivamente) y dos niveles de proteina bruta (CP) obtenidos por la adicion de urea (14,6 y 18,6 g.100 g MS1, LCP y HCP, respectivamente). Se corrieron sucesivamente cuatro periodos de 10d (7d para adaptacion, 3d para muestreo). La sintesis de proteina microbiana se estimo por la relacion purinas: N. Hubo una interaccion significativa entre niveles de WSC y CP para sintesis de proteina microbiana (P<0,001). El nivel de WSC no afecto el pH, la concentracion de amonio ni la concentracion de acidos grasos volatiles (VFA). Niveles mas altos de CP aumentaron la proporcion de acido acetico y tendieron a aumentar la relacion acetico propionico, mientras que el nivel de WSC no afecto las proporciones de VFA. Los tratamientos no afectaron la digestibilidad de los nutrientes. Concluimos que la adicion de fructosa cristalina a dietas basadas en raigras anual aumento la sintesis de proteina microbiana a los niveles mas altos de CP en la dieta.
{"title":"CONTRASTING LEVELS OF FRUCTOSE AND UREA ADDED TO AN ANNUAL RYEGRASS BASED DIET: EFFECTS ON MICROBIAL PROTEIN SYNTHESIS, NU TRIENT DI GESTI B ILI TY AND FERMENTAT ION PARAMETER S IN CONTI NUO US CULTURE FERMENTERS","authors":"M. Alende, G. Lascano, T. Jenkins, J. Andrae","doi":"10.19137/semiarida.2019(01).33-41","DOIUrl":"https://doi.org/10.19137/semiarida.2019(01).33-41","url":null,"abstract":"El objetivo de este experimento fue evaluar los efectos de la adicion de fructosa cristalina y urea a una dieta basada en raigras anual sobre la sintesis de proteina microbiana, la fermentacion y la digestibilidad de los nutrientes, usando fermentadores de flujo continuo. Se usaron seis fermentadores de flujo continuo en un arreglo factorial 3x2, con tres niveles de hidratos de carbono solubles (WSC) obtenidos por la adicion de fructosa cristalina (21, 24 y 27 g.100 g MS1; LWSC, MWSC y HWSC, respectivamente) y dos niveles de proteina bruta (CP) obtenidos por la adicion de urea (14,6 y 18,6 g.100 g MS1, LCP y HCP, respectivamente). Se corrieron sucesivamente cuatro periodos de 10d (7d para adaptacion, 3d para muestreo). La sintesis de proteina microbiana se estimo por la relacion purinas: N. Hubo una interaccion significativa entre niveles de WSC y CP para sintesis de proteina microbiana (P<0,001). El nivel de WSC no afecto el pH, la concentracion de amonio ni la concentracion de acidos grasos volatiles (VFA). Niveles mas altos de CP aumentaron la proporcion de acido acetico y tendieron a aumentar la relacion acetico propionico, mientras que el nivel de WSC no afecto las proporciones de VFA. Los tratamientos no afectaron la digestibilidad de los nutrientes. Concluimos que la adicion de fructosa cristalina a dietas basadas en raigras anual aumento la sintesis de proteina microbiana a los niveles mas altos de CP en la dieta.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"14 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82716010","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 : 2019-10-01DOI: 10.19137/semiarida.2019(01).11-17
Picca Aurora, Mirta Castaño, Julián Isasti, Maria Clementina Pereyra Cardozo, M. Fernández, Enzo Ferrari, R. Domínguez
The production of ethanol from grain sorghum was investigated in the present work, in response to the need of exploring other materials to obtain alcohol by fermentation. A laboratory experimental protocol was designed in order to evaluate ethanol yield, from grain in 7 genotypes. The ethanol production varied from 428,13 to 481,5 ml.kg MS1 at 68 hours of fermentation. INTA Blanco and Antel INTA genotypes significantly differed in ethanol yield. Through this research it was not possible to determine the impact of particular grain properties on bioconversion. The high ethanol yield demonstrated that grain sorghum can be an alternative for different regions, since it is a crop that adapts to different soil types and climate.
{"title":"BIOETHANOL PRODUCTION FROM GRAIN SORGHUM (Sorghum bicolor L. Moench) AT LABORATORY SCALE","authors":"Picca Aurora, Mirta Castaño, Julián Isasti, Maria Clementina Pereyra Cardozo, M. Fernández, Enzo Ferrari, R. Domínguez","doi":"10.19137/semiarida.2019(01).11-17","DOIUrl":"https://doi.org/10.19137/semiarida.2019(01).11-17","url":null,"abstract":"The production of ethanol from grain sorghum was investigated in the present work, in response to the need of exploring other materials to obtain alcohol by fermentation. A laboratory experimental protocol was designed in order to evaluate ethanol yield, from grain in 7 genotypes. The ethanol production varied from 428,13 to 481,5 ml.kg MS1 at 68 hours of fermentation. INTA Blanco and Antel INTA genotypes significantly differed in ethanol yield. Through this research it was not possible to determine the impact of particular grain properties on bioconversion. The high ethanol yield demonstrated that grain sorghum can be an alternative for different regions, since it is a crop that adapts to different soil types and climate.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90404475","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 : 2019-10-01DOI: 10.19137/semiarida.2019(01).53-62
Alexandra Dillchneider, Ileana Frasier, D. Funaro, R. Fernández, A. Quiroga
The objective of this work was to evaluate the influence of nitrogen fertilization on the expression of yield and grain protein content in wheat in different environments of the semiarid Pampa region. The field experiments were carried out in Embajador Martini, Macachín and Anguil. The treatments were: control (0N), fertilization at seeding with 40 kg N.ha (40+0) and 80 kg N.ha (80+0), delayed fertilization with 40 kg N.ha (between Z3.9 and Z5.0) (0+40) and divided fertilization (40+40). The treatments were arranged in a completely randomized block design with four replicates. Five filed experiments were carried out in each site and yield, grain protein content, water use efficiency and nitrogen use efficiency were determined. The sites with IMO> 4,5% had more response to yields in comparation with control, than the sites with IMO>4,5%. The soils with >50% A+L had grater soil potential fertility, and there were significant differences between the control and 80 kg.ha at seeding o divided fertilization. Instead, the soils with <50% A+L did not show significant differences in the yields between treatments. The lowest yields in these soils were translated in higher protein grain content, reaching 11%. More soil nitrogen content increases the grain nitrogen content but decreases nutrient use efficiency. Although, rainfalls are the main restriction of this region, with a good water availability, the wheat productivity is limited by low nitrogen content.
本研究旨在探讨氮肥对半干旱潘帕地区不同环境下小麦产量和籽粒蛋白质含量表达的影响。实地试验在马提尼大使、Macachín和安吉尔进行。处理为:对照(0氮)、播种施肥40 kg N.ha(40+0)和80 kg N.ha(80+0)、延迟施肥40 kg N.ha (Z3.9 ~ Z5.0)(0+40)和分施肥(40+40)。处理采用完全随机区组设计，设4个重复。每个基地进行5个大田试验，测定产量、籽粒蛋白质含量、水分利用效率和氮素利用效率。与对照相比，IMO> 4.5%的站点对产量的响应更大。>50% A+L的土壤肥力潜力较大，与80 kg对照差异显著。这是播种和分开施肥的结果。而A+L <50%的土壤在不同处理间产量差异不显著。这些土壤的最低产量转化为较高的蛋白粒含量，达到11%。土壤含氮量增加，籽粒含氮量增加，但养分利用效率降低。虽然降雨是该地区的主要制约因素，但在水分有效度良好的情况下，低氮含量限制了小麦的产量。
{"title":"NITROGEN FERTILIZATION STRATEGIES TO INCREASE YIELD AND PROTEIN OF WHEAT IN THE PAMPEAN SEMIARID REGION","authors":"Alexandra Dillchneider, Ileana Frasier, D. Funaro, R. Fernández, A. Quiroga","doi":"10.19137/semiarida.2019(01).53-62","DOIUrl":"https://doi.org/10.19137/semiarida.2019(01).53-62","url":null,"abstract":"The objective of this work was to evaluate the influence of nitrogen fertilization on the expression of yield and grain protein content in wheat in different environments of the semiarid Pampa region. The field experiments were carried out in Embajador Martini, Macachín and Anguil. The treatments were: control (0N), fertilization at seeding with 40 kg N.ha (40+0) and 80 kg N.ha (80+0), delayed fertilization with 40 kg N.ha (between Z3.9 and Z5.0) (0+40) and divided fertilization (40+40). The treatments were arranged in a completely randomized block design with four replicates. Five filed experiments were carried out in each site and yield, grain protein content, water use efficiency and nitrogen use efficiency were determined. The sites with IMO> 4,5% had more response to yields in comparation with control, than the sites with IMO>4,5%. The soils with >50% A+L had grater soil potential fertility, and there were significant differences between the control and 80 kg.ha at seeding o divided fertilization. Instead, the soils with <50% A+L did not show significant differences in the yields between treatments. The lowest yields in these soils were translated in higher protein grain content, reaching 11%. More soil nitrogen content increases the grain nitrogen content but decreases nutrient use efficiency. Although, rainfalls are the main restriction of this region, with a good water availability, the wheat productivity is limited by low nitrogen content.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91230412","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 : 2019-10-01DOI: 10.19137/semiarida.2019(01).19-32
M. Fernández, O. Zingaretti, D. Riestra
Winter cereals are important in agrosystems of the drysubhumid Pampas region. Environmental factors such as rainfall and temperature dominant in the definition of grain yield, there is usually a great interaction with the genotype. The triticale (X Triticosecale Wittmack) and durum wheat (Triticum durum Desf.) may be alternatives to bread wheat (Triticum aestivum L.) to stabilize the grain yields of winter cereals. The study was conducted in the Faculty of Agronomy of UNLPam Experimental Field, located at 36o 46 'S and 64o 17' W, 210 m above sea level. The tests were conducted for eight years, which compared the three species, (five varieties of bread wheat, four of durum wheat and two of triticale), with two fertility conditions. The two triticale`s genotypes and bread wheat “Buck guaraní” had greater grain yield, while durum wheats showed average to low yields. The grain yield stability was not exclusive of one species, since triticale “Eronga 83”, bread wheat “ACA 601” and durum wheat “Ciccio” were stable, and bread wheat “Abate” and durum wheat “Buck cristal” were unstable. The CVi of Francis and Kannemberg and VEP of AMMI methods showed a good description of the clasification stability`s including all methods. The grain yield stability was not associated with higher yield potential.
{"title":"THE STABILITY OF GRAIN YIELD IN WINTER CEREALS IN THE DRYSUBHUMID PAMPAS REGION","authors":"M. Fernández, O. Zingaretti, D. Riestra","doi":"10.19137/semiarida.2019(01).19-32","DOIUrl":"https://doi.org/10.19137/semiarida.2019(01).19-32","url":null,"abstract":"Winter cereals are important in agrosystems of the drysubhumid Pampas region. Environmental factors such as rainfall and temperature dominant in the definition of grain yield, there is usually a great interaction with the genotype. The triticale (X Triticosecale Wittmack) and durum wheat (Triticum durum Desf.) may be alternatives to bread wheat (Triticum aestivum L.) to stabilize the grain yields of winter cereals. The study was conducted in the Faculty of Agronomy of UNLPam Experimental Field, located at 36o 46 'S and 64o 17' W, 210 m above sea level. The tests were conducted for eight years, which compared the three species, (five varieties of bread wheat, four of durum wheat and two of triticale), with two fertility conditions. The two triticale`s genotypes and bread wheat “Buck guaraní” had greater grain yield, while durum wheats showed average to low yields. The grain yield stability was not exclusive of one species, since triticale “Eronga 83”, bread wheat “ACA 601” and durum wheat “Ciccio” were stable, and bread wheat “Abate” and durum wheat “Buck cristal” were unstable. The CVi of Francis and Kannemberg and VEP of AMMI methods showed a good description of the clasification stability`s including all methods. The grain yield stability was not associated with higher yield potential.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87673156","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 : 2019-06-01DOI: 10.19137/SEMIARIDA.2018(02).45-50
J. Maldonado, M. S. Agüero, Facundo Iturmendi, M. Buglione
{"title":"EFFECT OF AMENDMENT WITH COMPOST OF PEAR POMACE ON FORAGE PRODUCTION OF Setaria italica (L.) P. Beauv.","authors":"J. Maldonado, M. S. Agüero, Facundo Iturmendi, M. Buglione","doi":"10.19137/SEMIARIDA.2018(02).45-50","DOIUrl":"https://doi.org/10.19137/SEMIARIDA.2018(02).45-50","url":null,"abstract":"","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"52 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90606848","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 : 2019-06-01DOI: 10.19137/SEMIARIDA.2018(02).9-15
M. Martin, E. Morici, H. Petruzzi
Rangelands can be managed ecologically so that they remain productive and environmentally sta ble. Cattle movement in pastures is directly related to the size of the paddock and the water source location. Grazing, even with moderate stocking rates, produce important floristic gradient with a re duction in the number of forage species nearby to the water source areas. The seed bank plays an important role in population plant maintenance and pasture recovery after a disturbance. The aim of this study was to evaluate how grazing time and distance to the water supply (near, middle and far), affects some population parameters of Piptochaetium napostaense and seed bank. The longer the grazing time, the more affected the population parameters (crown diameter, number of stems and seeds per plant) are, as well as the number of propagules in the bank. Extended grazing times in areas near the water source will benefit the seed bank of nonforage warm season rhizomatous spe cies.
{"title":"EFFECT OF GRAZING TIME ON GRASLAND SEEDBANK AND Piptochaetium napostaense's STRUCTURAL PARAMETERS","authors":"M. Martin, E. Morici, H. Petruzzi","doi":"10.19137/SEMIARIDA.2018(02).9-15","DOIUrl":"https://doi.org/10.19137/SEMIARIDA.2018(02).9-15","url":null,"abstract":"Rangelands can be managed ecologically so that they remain productive and environmentally sta ble. Cattle movement in pastures is directly related to the size of the paddock and the water source location. Grazing, even with moderate stocking rates, produce important floristic gradient with a re duction in the number of forage species nearby to the water source areas. The seed bank plays an important role in population plant maintenance and pasture recovery after a disturbance. The aim of this study was to evaluate how grazing time and distance to the water supply (near, middle and far), affects some population parameters of Piptochaetium napostaense and seed bank. The longer the grazing time, the more affected the population parameters (crown diameter, number of stems and seeds per plant) are, as well as the number of propagules in the bank. Extended grazing times in areas near the water source will benefit the seed bank of nonforage warm season rhizomatous spe cies.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73126215","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 : 2019-06-01DOI: 10.19137/SEMIARIDA.2018(02).35-44
F. Fritz, Fernando Ramonda, E. Baudino
The work`s aims were to identify both harmful and helpful insect species for safflower crop and to study their distribution along time in relation to plant phenological state. The insect species iden tified as harmful were: Uroleucon jaceae L., Capitophorus elaeagni, Frankliniella occidentalis P., Di chelops furcatus (F.), Athaumasthus haematicus (Stål), Nezara viridula (L.), Nysius simulans Stål, Edessa meditabunda (F.), Piezodorus guildinii (W.), Helicoverpa zea B., Epicauta adspersa K., Spo doptera frugiperda (J. E. Smith), Chauliognathus scriptus (Germ.), Pantomorus auripes H. and Ra chiplusia nu (G.). Regarding aphids, their highest density was observed at the beginning of November, when crop was in the state of branching, with invasion mainly of the upper third of plants: leaves, young shoots and flower heads. Among all harmful true bugs found in the crop, red bug Athaumastus haematicus (Stål) comprised the highest proportion and was detected before aphids attacks, when stem elongation of plants was just beginning. As for beneficial species, the six insects detected in sufflower crop were Hippodamia convergens G., Eriopis connexa G., Harmonia axyridis (P.), Nabis sp., Ophion sp. and Apis melifera L., besides various spider species. The coccinellids Hippodamia convergens; Eriopis connexa and Harmonia axydiris performed as the main natural control agents at crop.
{"title":"HARMFUL AND BENEFICIAL INSECTS FOR SAFFLOWER CROP IN THE SEMIARID PAMPEAN REGION","authors":"F. Fritz, Fernando Ramonda, E. Baudino","doi":"10.19137/SEMIARIDA.2018(02).35-44","DOIUrl":"https://doi.org/10.19137/SEMIARIDA.2018(02).35-44","url":null,"abstract":"The work`s aims were to identify both harmful and helpful insect species for safflower crop and to study their distribution along time in relation to plant phenological state. The insect species iden tified as harmful were: Uroleucon jaceae L., Capitophorus elaeagni, Frankliniella occidentalis P., Di chelops furcatus (F.), Athaumasthus haematicus (Stål), Nezara viridula (L.), Nysius simulans Stål, Edessa meditabunda (F.), Piezodorus guildinii (W.), Helicoverpa zea B., Epicauta adspersa K., Spo doptera frugiperda (J. E. Smith), Chauliognathus scriptus (Germ.), Pantomorus auripes H. and Ra chiplusia nu (G.). Regarding aphids, their highest density was observed at the beginning of November, when crop was in the state of branching, with invasion mainly of the upper third of plants: leaves, young shoots and flower heads. Among all harmful true bugs found in the crop, red bug Athaumastus haematicus (Stål) comprised the highest proportion and was detected before aphids attacks, when stem elongation of plants was just beginning. As for beneficial species, the six insects detected in sufflower crop were Hippodamia convergens G., Eriopis connexa G., Harmonia axyridis (P.), Nabis sp., Ophion sp. and Apis melifera L., besides various spider species. The coccinellids Hippodamia convergens; Eriopis connexa and Harmonia axydiris performed as the main natural control agents at crop.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79335047","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 : 2019-06-01DOI: 10.19137/SEMIARIDA.2018(02).25-33
N. Juan, L. Fontana, M. A. Ruiz, F. Babinec
{"title":"USE OF WHITE SWEET CLOVER (Melilotus albus Medik.) AS A GREEN FERTILIZER, EFFECT ON SOIL CONDITIONS AND PRODUCTIVITY OF SUBSEQUENT CULTIVATION","authors":"N. Juan, L. Fontana, M. A. Ruiz, F. Babinec","doi":"10.19137/SEMIARIDA.2018(02).25-33","DOIUrl":"https://doi.org/10.19137/SEMIARIDA.2018(02).25-33","url":null,"abstract":"","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"54 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77190441","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 : 2019-06-01DOI: 10.19137/SEMIARIDA.2018(02).17-24
M. A. Ruiz, G. Blain, R. Ernst, José Stemphelet, N. Juan, L. Fontana
{"title":"ACCUMULATION AND FORAGE QUALITY OF WHEATGRASS SPECIES DURING IMPLANTATION STAGE UNDER DIFFERENT SEEDING DENSITY","authors":"M. A. Ruiz, G. Blain, R. Ernst, José Stemphelet, N. Juan, L. Fontana","doi":"10.19137/SEMIARIDA.2018(02).17-24","DOIUrl":"https://doi.org/10.19137/SEMIARIDA.2018(02).17-24","url":null,"abstract":"","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"99 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89962693","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 : 2018-06-01DOI: 10.19137/semiarida.2018(02).51-58
S. Echaniz, A. Vignatti
The main source of fluoride in superficial or groundwater is the solubilization of fluorinated mineral com pounds. Although it is an oligonutrient, its excess can be toxic to organisms. In La Pampa there is informa tion about its concentrations in groundwater, the main source of many cities and towns. The information referred to superficial waters is scarce, which makes it difficult to estimate their possible effects on aquatic organisms. The objective was to know the fluoride concentrations in pampean aquatic ecosystems and analyze if they are superior to the guide levels for biota protection. Samples were taken between 2002 and 2017 in 27 aquatic ecosystems. Flouride determinations were made with the SPANDS colorimetric method. Concentrations varied between 0.2 and 13.89 mg.L and exceeded the national guideline for aquatic biota protection (1.4 mg.L) in 22 ecosystems. There was a correlation with salinity, since higher concentrations were registered in saline shallow lakes. No regional distribution pattern was detected but the highest con centrations (>9 mg.L) were recorded in northern lakes. The values of La Pampa, slightly higher than those of most of the water bodies in the province of Buenos Aires, were similar to those of Chasicó Lake, in the southwest of that province.
{"title":"FLUORIDE IN SUPERFICIAL WATERS OF LA PAMPA PROVINCE","authors":"S. Echaniz, A. Vignatti","doi":"10.19137/semiarida.2018(02).51-58","DOIUrl":"https://doi.org/10.19137/semiarida.2018(02).51-58","url":null,"abstract":"The main source of fluoride in superficial or groundwater is the solubilization of fluorinated mineral com pounds. Although it is an oligonutrient, its excess can be toxic to organisms. In La Pampa there is informa tion about its concentrations in groundwater, the main source of many cities and towns. The information referred to superficial waters is scarce, which makes it difficult to estimate their possible effects on aquatic organisms. The objective was to know the fluoride concentrations in pampean aquatic ecosystems and analyze if they are superior to the guide levels for biota protection. Samples were taken between 2002 and 2017 in 27 aquatic ecosystems. Flouride determinations were made with the SPANDS colorimetric method. Concentrations varied between 0.2 and 13.89 mg.L and exceeded the national guideline for aquatic biota protection (1.4 mg.L) in 22 ecosystems. There was a correlation with salinity, since higher concentrations were registered in saline shallow lakes. No regional distribution pattern was detected but the highest con centrations (>9 mg.L) were recorded in northern lakes. The values of La Pampa, slightly higher than those of most of the water bodies in the province of Buenos Aires, were similar to those of Chasicó Lake, in the southwest of that province.","PeriodicalId":34010,"journal":{"name":"Semiarida","volume":"31 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72763556","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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