Pub Date : 2023-07-26DOI: 10.47280/revfacagron(luz).v40.n3.04
Lissy Rosabal, Francisco Guevara Hernández, Víctor Ruiz, M. La O, Deb Raj, Mariela Reyes
The use of microbial consortia as biofertilizers allows improving crop productivity and the quality of agricultural soils, by incorporating microorganisms that facilitate the availability of nutrients for plants and change the soil physicochemical conditions. In order to evaluate the effect of microbial consortia on maize yield, inoculums from different environments were used in the maize crop of Villa Corzo and Villaflores municipalities, Chiapas. Six treatments with different consortia were defined: three from agricultural plots and three from mountains “La Frailescana”, “Cerro Nambiyugua” and Biosphere Reserve “La Sepultura”-, and one control, under a randomized block experimental design with four replications. The application of the microbial consortia was made directly to the soil at 20, 40 and 60 days after sowing of the crop. The effect of the consortia on maize yield was determined using a design with nested effects in which the effects of the origin of the microbial consortia were controlled, and the nested treatments in the environments. The association between the physicochemical components of the consortia and the culture yield was evaluated using Pearson’s correlation (p ≤ 0.05). Only the mountain consortiums from “La Sepultura” were the ones that showed maize yield increase. However, both the mountain and plot consortiums have the potential to be used as biofertilizers in maize cultivation, when combined with another source of organic fertilization, such as poultry manure.
{"title":"Effect of microbial consortia on maize yield in Chiapas, Mexico","authors":"Lissy Rosabal, Francisco Guevara Hernández, Víctor Ruiz, M. La O, Deb Raj, Mariela Reyes","doi":"10.47280/revfacagron(luz).v40.n3.04","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n3.04","url":null,"abstract":"The use of microbial consortia as biofertilizers allows improving crop productivity and the quality of agricultural soils, by incorporating microorganisms that facilitate the availability of nutrients for plants and change the soil physicochemical conditions. In order to evaluate the effect of microbial consortia on maize yield, inoculums from different environments were used in the maize crop of Villa Corzo and Villaflores municipalities, Chiapas. Six treatments with different consortia were defined: three from agricultural plots and three from mountains “La Frailescana”, “Cerro Nambiyugua” and Biosphere Reserve “La Sepultura”-, and one control, under a randomized block experimental design with four replications. The application of the microbial consortia was made directly to the soil at 20, 40 and 60 days after sowing of the crop. The effect of the consortia on maize yield was determined using a design with nested effects in which the effects of the origin of the microbial consortia were controlled, and the nested treatments in the environments. The association between the physicochemical components of the consortia and the culture yield was evaluated using Pearson’s correlation (p ≤ 0.05). Only the mountain consortiums from “La Sepultura” were the ones that showed maize yield increase. However, both the mountain and plot consortiums have the potential to be used as biofertilizers in maize cultivation, when combined with another source of organic fertilization, such as poultry manure.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"36 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83485824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-23DOI: 10.47280/revfacagron(luz).v40.n3.05
Luis Cedeño-Sares, Raúl Díaz-Torres, Thayana Núñez-Quezada, Gabriela Armijos-Cabrera, Luis Cruz-Viera
Ascorbic acid is a beneficial component for health, but it is degraded during the thermal pasteurization of food products. The aim of this research was to determine the influence of temperature on the thermal degradation of ascorbic acid in peach nectar at 75, 85 and 95 °C, evaluating this effect at 0, 30, 60, 90 and 120 minutes. The degradation of ascorbic acid follows a first order reaction model with rate constants that vary between 5.5 to 10.9 x 10-3 min-1. D-Values ranged from 211.28 to 418.73 min, while Z value was 69.4 oC. The values of the free energy of inactivation ranged between 112.63 and 117.17 kJ.mol-1, while for the activation enthalpy the values varied between 25.37 and 25.54 kJ.mol-1 and the range for the activation entropy was from -249.36 to -250.15 J.mol-1.K-1.It can be concluding that the reaction is endothermic and does not occur spontaneously. The knowledge of these values is important not only to explain the loss of ascorbic acid, but also to design and optimize thermal processes aimed at preserving the nutritional quality of peach nectar.
{"title":"Degradation kinetics of ascorbic acid in peach nectar during thermal processing","authors":"Luis Cedeño-Sares, Raúl Díaz-Torres, Thayana Núñez-Quezada, Gabriela Armijos-Cabrera, Luis Cruz-Viera","doi":"10.47280/revfacagron(luz).v40.n3.05","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n3.05","url":null,"abstract":"Ascorbic acid is a beneficial component for health, but it is degraded during the thermal pasteurization of food products. The aim of this research was to determine the influence of temperature on the thermal degradation of ascorbic acid in peach nectar at 75, 85 and 95 °C, evaluating this effect at 0, 30, 60, 90 and 120 minutes. The degradation of ascorbic acid follows a first order reaction model with rate constants that vary between 5.5 to 10.9 x 10-3 min-1. D-Values ranged from 211.28 to 418.73 min, while Z value was 69.4 oC. The values of the free energy of inactivation ranged between 112.63 and 117.17 kJ.mol-1, while for the activation enthalpy the values varied between 25.37 and 25.54 kJ.mol-1 and the range for the activation entropy was from -249.36 to -250.15 J.mol-1.K-1.It can be concluding that the reaction is endothermic and does not occur spontaneously. The knowledge of these values is important not only to explain the loss of ascorbic acid, but also to design and optimize thermal processes aimed at preserving the nutritional quality of peach nectar.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"2 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88776412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-18DOI: 10.47280/revfacagron(luz).v40.n3.03
A. Oulmi, Amor Bencheikh, Walid Mamache, Asma Gharzouli, Meriem Barkahoum Daichi, N. Rouag
The in vitro and growth chamber, tests were conducted in order to assess the effects of B. amyloliquefaciens B18 and B. subtilis S8 strains each alone and in combination with tebuconazole against F. culmorum (FC) isolate responsible of Fusarium crown rot (FCR) in durum wheat. The in vitro growth of B18 and S8 strains was unaffected by 30 µg.mL-1 tebuconazole. The Bacillus strains (at 106 CFU.mL-1) and tebuconazole, each alone, reduced the mycelial growth, this effect was significantly improved when they were combined (inhibition of more than 92 %). In growth chamber experiments, efficacy against FCR was significantly higher when integrating Bacillus strains and tebuconazole than by either alone; control efficacy of tebuconazole at 30 µg.mL-1 in combination with S8 and B18 strains reached 90.91 and 95.45 %, respectively. The obtained results indicated that combination of tebuconazole with the biocontrol agents B18 and S8 synergistically improved control efficiency of the fungicide against FCR of wheat.
{"title":"Study of synergistic effect of combined application of tebuconazole with two biocontrol agents for management of Fusarium crown rot in durum wheat","authors":"A. Oulmi, Amor Bencheikh, Walid Mamache, Asma Gharzouli, Meriem Barkahoum Daichi, N. Rouag","doi":"10.47280/revfacagron(luz).v40.n3.03","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n3.03","url":null,"abstract":"The in vitro and growth chamber, tests were conducted in order to assess the effects of B. amyloliquefaciens B18 and B. subtilis S8 strains each alone and in combination with tebuconazole against F. culmorum (FC) isolate responsible of Fusarium crown rot (FCR) in durum wheat. The in vitro growth of B18 and S8 strains was unaffected by 30 µg.mL-1 tebuconazole. The Bacillus strains (at 106 CFU.mL-1) and tebuconazole, each alone, reduced the mycelial growth, this effect was significantly improved when they were combined (inhibition of more than 92 %). In growth chamber experiments, efficacy against FCR was significantly higher when integrating Bacillus strains and tebuconazole than by either alone; control efficacy of tebuconazole at 30 µg.mL-1 in combination with S8 and B18 strains reached 90.91 and 95.45 %, respectively. The obtained results indicated that combination of tebuconazole with the biocontrol agents B18 and S8 synergistically improved control efficiency of the fungicide against FCR of wheat.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"32 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85139810","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
According to the REDD + Program, it is necessary to monitor, quantify and report the forest system status of protected areas. Having this in mind the objective of this work is to delimit the growing seasons of Chaco Semi-arid Forest (FCHS) in Copo National Park (CNP), Santiago del Estero, Argentina, in the 2000-2022 period using time series of NDVIMODIS., and to quantify their Seasonally Integrated Aboveground Net Primary Productivity (SI-ANPP), its trend, and Rain Use Efficiency (RUE), and relate them to integrated seasonal rainfall (SR). The NDVIMODIS time series and the 0.5 NDVIRATIO thresholds made it possible to delimit the growth season, and quantify the SI-ANPP of FCHS with high efficiency. Significant differences were found (T = -3.49; p = 0.0006) in the SI-ANPP of FCHS. The SI-ANPP evidences high sensitivity to negative anomalies of seasonal rainfalls. The nonlinear regression model obtained (R2 = 0.73; p < 0.0001) provides unedited information at the local level on the efficiency of the SI-ANPP in terms of the SR. Seasonal rainfall >700 mm could be considered a threshold (or boundary) in the efficient water use of FCHS. The large positive trend of SI-ANPP of the FCHS CNP in the period 2000-2022 (slope = 462.43; T = 25.64; p <0.0001) evidenced the high stability of the forest system. The results obtained reaffirm the importance of creating legally protected areas, such as national parks, for the preservation of forest systems in the region.
{"title":"Above-ground net primary productivity and rain use efficiency of Chaco Semi-arid Forest in 1 Copo National Park, Santiago del Estero, Argentina","authors":"J. Tiedemann, Andreise Moreira","doi":"10.24215/16699513e120","DOIUrl":"https://doi.org/10.24215/16699513e120","url":null,"abstract":"According to the REDD + Program, it is necessary to monitor, quantify and report the forest system status of protected areas. Having this in mind the objective of this work is to delimit the growing seasons of Chaco Semi-arid Forest (FCHS) in Copo National Park (CNP), Santiago del Estero, Argentina, in the 2000-2022 period using time series of NDVIMODIS., and to quantify their Seasonally Integrated Aboveground Net Primary Productivity (SI-ANPP), its trend, and Rain Use Efficiency (RUE), and relate them to integrated seasonal rainfall (SR). The NDVIMODIS time series and the 0.5 NDVIRATIO thresholds made it possible to delimit the growth season, and quantify the SI-ANPP of FCHS with high efficiency. Significant differences were found (T = -3.49; p = 0.0006) in the SI-ANPP of FCHS. The SI-ANPP evidences high sensitivity to negative anomalies of seasonal rainfalls. The nonlinear regression model obtained (R2 = 0.73; p < 0.0001) provides unedited information at the local level on the efficiency of the SI-ANPP in terms of the SR. Seasonal rainfall >700 mm could be considered a threshold (or boundary) in the efficient water use of FCHS. The large positive trend of SI-ANPP of the FCHS CNP in the period 2000-2022 (slope = 462.43; T = 25.64; p <0.0001) evidenced the high stability of the forest system.\u0000The results obtained reaffirm the importance of creating legally protected areas, such as national parks, for the preservation of forest systems in the region.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44297793","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-07-01DOI: 10.47280/revfacagron(luz).v40.n3.02
J. Conde, Sara Castillo, Leonor Rivera, Paola Gálvez
Agriculture is the economic sector that consumes around 70 % of the total water extracted globally, considering itself a victim of its own inefficiency. The present work was oriented to look for irrigation alternatives that allow a greater productivity of water. The trial was carried out at the Faculty of Agricultural Sciences, Technical University of Machala, Ecuador. The amount of water applied to the corn crop through furrow and drip irrigation was evaluated. The treatments were: furrow irrigation, superficial drip irrigation and subsurface drip irrigation at 20 cm. The trial had a surface area of 450 m2, in a completely randomized block experimental design with three treatments and three repetitions. The control of the irrigation regime was carried out through tensiometers installed for each treatment. The volume of water applied and the dry grain yield in irrigation by furrows was 3,484 m3.ha-1 and 9,175 kg.ha-1, for surface drip irrigation of 1,452 m3.ha-1 and 10,200 kg.ha-1, and for subsurface drip irrigation it was 1,237 m3.ha-1 and 10,181.2 kg.ha-1. The water productivity for the furrow irrigation treatment was 2.63 kg.m-3, for surface drip irrigation it was 7.02 kg.m-3 and for subsurface drip irrigation at 20 cm it was 8.23 kg.m-3 being the highest productivity.
{"title":"Water productivity using furrow and drip irrigation in hybrid maize","authors":"J. Conde, Sara Castillo, Leonor Rivera, Paola Gálvez","doi":"10.47280/revfacagron(luz).v40.n3.02","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n3.02","url":null,"abstract":"Agriculture is the economic sector that consumes around 70 % of the total water extracted globally, considering itself a victim of its own inefficiency. The present work was oriented to look for irrigation alternatives that allow a greater productivity of water. The trial was carried out at the Faculty of Agricultural Sciences, Technical University of Machala, Ecuador. The amount of water applied to the corn crop through furrow and drip irrigation was evaluated. The treatments were: furrow irrigation, superficial drip irrigation and subsurface drip irrigation at 20 cm. The trial had a surface area of 450 m2, in a completely randomized block experimental design with three treatments and three repetitions. The control of the irrigation regime was carried out through tensiometers installed for each treatment. The volume of water applied and the dry grain yield in irrigation by furrows was 3,484 m3.ha-1 and 9,175 kg.ha-1, for surface drip irrigation of 1,452 m3.ha-1 and 10,200 kg.ha-1, and for subsurface drip irrigation it was 1,237 m3.ha-1 and 10,181.2 kg.ha-1. The water productivity for the furrow irrigation treatment was 2.63 kg.m-3, for surface drip irrigation it was 7.02 kg.m-3 and for subsurface drip irrigation at 20 cm it was 8.23 kg.m-3 being the highest productivity.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"19 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85285182","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Verónica Chillo, Paola Pizzingrilli, Maria Noel Szudruk Pascual, Leila Heinzle
La producción de fruta fina de forma orgánica y/o agroecológica en la Comarca Andina del Paralelo 42º se encuentra con el problema de escasa información local sobre prácticas de manejo de la sanidad de los cultivos, lo que impacta directamente en la producción actual y en la posibilidad de transiciones agroecológicas futuras. El objetivo de este trabajo fue evaluar el efecto de diferentes prácticas de manejo sobre la biodiversidad taxonómica y funcional de artrópodos en cultivos orgánicos de frambuesa en chacras de El Bolsón, Río Negro. Encontramos que una mayor frecuencia de desmalezado manual, la fertilización con abono local y el no uso de control químico de plagas favorecen una mayor riqueza, diversidad y equitatividad de morfoespecies, así como una heterogeneidad en la composición de la comunidad respecto de hábitos alimenticios y de importancia agrícola de artrópodos. Esta mayor diversidad no implica un aumento en la abundancia o dominancia de las potenciales plagas, sino por el contrario, se ve un aumento en los potenciales controladores biológicos (depredadores y parasitoides). Estos resultados permite pensar en el diseño de prácticas de control biológico que permitan cultivos sin vegetación espontánea, pero queda por definir la importancia de la cercanía con ambientes naturales y de diversidad agrícola dentro de la chacra.
{"title":"Efecto de diferentes prácticas de manejo orgánico en frambueso sobre la diversidad de artrópodos de importancia agrícola en El Bolsón, Río Negro","authors":"Verónica Chillo, Paola Pizzingrilli, Maria Noel Szudruk Pascual, Leila Heinzle","doi":"10.24215/16699513e119","DOIUrl":"https://doi.org/10.24215/16699513e119","url":null,"abstract":"La producción de fruta fina de forma orgánica y/o agroecológica en la Comarca Andina del Paralelo 42º se encuentra con el problema de escasa información local sobre prácticas de manejo de la sanidad de los cultivos, lo que impacta directamente en la producción actual y en la posibilidad de transiciones agroecológicas futuras. El objetivo de este trabajo fue evaluar el efecto de diferentes prácticas de manejo sobre la biodiversidad taxonómica y funcional de artrópodos en cultivos orgánicos de frambuesa en chacras de El Bolsón, Río Negro. Encontramos que una mayor frecuencia de desmalezado manual, la fertilización con abono local y el no uso de control químico de plagas favorecen una mayor riqueza, diversidad y equitatividad de morfoespecies, así como una heterogeneidad en la composición de la comunidad respecto de hábitos alimenticios y de importancia agrícola de artrópodos. Esta mayor diversidad no implica un aumento en la abundancia o dominancia de las potenciales plagas, sino por el contrario, se ve un aumento en los potenciales controladores biológicos (depredadores y parasitoides). Estos resultados permite pensar en el diseño de prácticas de control biológico que permitan cultivos sin vegetación espontánea, pero queda por definir la importancia de la cercanía con ambientes naturales y de diversidad agrícola dentro de la chacra.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":" ","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47607911","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-27DOI: 10.47280/revfacagron(luz).v40.n3.01
Lianet Brizuela-Fuentes, R. Holguín-Peña, E. Macías, Wilson Ceiro-Catasú
Tobacco is a crop of economic importance in tropical countries; it generates significant income in small agricultural areas. Within the agrotechnical activities that are carried out on this plant, biofertilization with Autochthonous Microorganisms (AM) represents a viable option for production with low inputs. Therefore, the objective of the research was to determine the biofertilizer effect of AM on black tobacco cv. Havana-2000. The experiment was carried out on a farm located in Los Cayos, Yara, Granma, Cuba, during the period November-February/2021. For this, the yield variables and the components were measured in the field. Statistical processing was performed using ANOVA and principal component analysis. The AM recorded four groups of microbes: bacteria (7x1012 CFU.mL-1) Lactobacillus sp. and Rhodopseudomonas sp., the fungi (3x1011 CFU.mL-1) Trichoderma sp., Aspergillus sp. and Penicillium sp., the yeasts (2x1011 CFU.mL-1) Saccharomyces sp. and Candida sp. and the actinomycete Streptomyces sp. (1x1010 CFU.mL-1). In the field, the AM biostimulated between 15 - 82 % of the yield and the components, achieving the best results at the dose of 36 L.ha-1. Finally, the importance of using AM as an organic alternative for tobacco biofertilization is demonstrated.
{"title":"Autochthonous microorganisms as an alternative for biofertilization of Nicotiana tabacum L.","authors":"Lianet Brizuela-Fuentes, R. Holguín-Peña, E. Macías, Wilson Ceiro-Catasú","doi":"10.47280/revfacagron(luz).v40.n3.01","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n3.01","url":null,"abstract":"Tobacco is a crop of economic importance in tropical countries; it generates significant income in small agricultural areas. Within the agrotechnical activities that are carried out on this plant, biofertilization with Autochthonous Microorganisms (AM) represents a viable option for production with low inputs. Therefore, the objective of the research was to determine the biofertilizer effect of AM on black tobacco cv. Havana-2000. The experiment was carried out on a farm located in Los Cayos, Yara, Granma, Cuba, during the period November-February/2021. For this, the yield variables and the components were measured in the field. Statistical processing was performed using ANOVA and principal component analysis. The AM recorded four groups of microbes: bacteria (7x1012 CFU.mL-1) Lactobacillus sp. and Rhodopseudomonas sp., the fungi (3x1011 CFU.mL-1) Trichoderma sp., Aspergillus sp. and Penicillium sp., the yeasts (2x1011 CFU.mL-1) Saccharomyces sp. and Candida sp. and the actinomycete Streptomyces sp. (1x1010 CFU.mL-1). In the field, the AM biostimulated between 15 - 82 % of the yield and the components, achieving the best results at the dose of 36 L.ha-1. Finally, the importance of using AM as an organic alternative for tobacco biofertilization is demonstrated.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"151 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76247807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-10DOI: 10.47280/revfacagron(luz).v40.n2.12
Abdelmadjid Chelli, A. Oudjiane, R. Zebsa, S. Razi, F. Boussad, S. Boudalia
In response to alerts from farmers in Bejaia region (central-north Algeria) about the decline of their fig trees, a survey was conducted between 2019 and 2021 in the main localities known for fig crops. Hypocryphalus scabricollis (Eichhoff) (Coleoptera, Curculionidae: Scolytinae) was identified as the causal agent of fig tree decline in the region. This species is reported for the first time in Algeria. Here, a morphological description and main biological traits of this species are given. Distribution of H. scabricollis in the Bejaia region is illustred, and an overview of its behaviour, symptoms and damage caused to the host plant, and their potential impact in commercial fig production is discussed. This work aims to provide a preliminary database to the scientific community about this xylophagous pest of fig trees and to alert regional and national policy makers to take it seriously and address emerging bark beetle problems before it is too late.
{"title":"Fig tree xylophagous pest’s effects in the Bejaia region (central-north Algeria)","authors":"Abdelmadjid Chelli, A. Oudjiane, R. Zebsa, S. Razi, F. Boussad, S. Boudalia","doi":"10.47280/revfacagron(luz).v40.n2.12","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n2.12","url":null,"abstract":"In response to alerts from farmers in Bejaia region (central-north Algeria) about the decline of their fig trees, a survey was conducted between 2019 and 2021 in the main localities known for fig crops. Hypocryphalus scabricollis (Eichhoff) (Coleoptera, Curculionidae: Scolytinae) was identified as the causal agent of fig tree decline in the region. This species is reported for the first time in Algeria. Here, a morphological description and main biological traits of this species are given. Distribution of H. scabricollis in the Bejaia region is illustred, and an overview of its behaviour, symptoms and damage caused to the host plant, and their potential impact in commercial fig production is discussed. This work aims to provide a preliminary database to the scientific community about this xylophagous pest of fig trees and to alert regional and national policy makers to take it seriously and address emerging bark beetle problems before it is too late.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"217 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73799895","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-06DOI: 10.47280/revfacagron(luz).v40.n2.09
María Palomeque, A. Urdaneta, Rosana Meleán
This research analyzed production management of 74 agricultural production units, belonging to the Coast Banana Farmers Association (ASOAGRIBAL) from El Oro province - Ecuador. Latent variables were specified such as situational analysis, planning and control and support technology in processes. It were added profitability as a key indicator, considering the financial point of view in this type of organization. The research was positivist, quantitative, analytical, non-experimental, with a transectional and field data design. The data collection instrument designed was the questionnaire, applied through the survey technique. Descriptive results indicate that the variables situational analysis (3.56), planning and control processes (3.40) and production technology platform (3.51) obtained statistical means that allowed them to be classified as good, while the mean value of profitability (3.36) classifies it as regular, far from the classification of excellence. The estimated correlations showed that none of the dimensions under study reached levels of excellence. Results of structural equations model analysis showed a high degree of linear association and positive dependence between the four latent variables; that is, they vary jointly with respect to their average. It is necessary to work on the integration of production tasks as a mechanism to achieve higher levels of profitability, which result in the economic-financial well-being of agricultural companies.
{"title":"Production management in banana production units, El Oro province - Ecuador","authors":"María Palomeque, A. Urdaneta, Rosana Meleán","doi":"10.47280/revfacagron(luz).v40.n2.09","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n2.09","url":null,"abstract":"This research analyzed production management of 74 agricultural production units, belonging to the Coast Banana Farmers Association (ASOAGRIBAL) from El Oro province - Ecuador. Latent variables were specified such as situational analysis, planning and control and support technology in processes. It were added profitability as a key indicator, considering the financial point of view in this type of organization. The research was positivist, quantitative, analytical, non-experimental, with a transectional and field data design. The data collection instrument designed was the questionnaire, applied through the survey technique. Descriptive results indicate that the variables situational analysis (3.56), planning and control processes (3.40) and production technology platform (3.51) obtained statistical means that allowed them to be classified as good, while the mean value of profitability (3.36) classifies it as regular, far from the classification of excellence. The estimated correlations showed that none of the dimensions under study reached levels of excellence. Results of structural equations model analysis showed a high degree of linear association and positive dependence between the four latent variables; that is, they vary jointly with respect to their average. It is necessary to work on the integration of production tasks as a mechanism to achieve higher levels of profitability, which result in the economic-financial well-being of agricultural companies.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"2 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78605407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-06-02DOI: 10.47280/revfacagron(luz).v40.n2.10
F. Ruiz-Espinoza, J. Reyes-Pérez, F. Beltrán-Morales, B. Murillo-Amador, J. Rodríguez-Ortiz, P. Arce-Amezquita
Legumes are used as fodder and green manures, because of fix nitrogen biologically. The objective of this study was to determine the emergence capacity and the early growth of four legume species treated with different NaCl-stress concentrations. The experiment was established in a completely randomized design with a factorial arrangement, where the first factor was the four legumes’ species (Vigna unguiculata L. Walp., Lablab purpureus (L.) Sweet, Clitoria ternatea L. and Canavalia ensiformis L. DC.) and the second factor was NaCl concentrations (0.25, 50, and 75 mM) with 16 treatments and four replications. The variables evaluated were emergence rate and percentage, stem and root length, fresh and dry weight of stem+leaves and root, stem and root length, stem diameter and the ratio of stems+leaves dry weight and roots dry weight (plant balance). The results showed that all variables expressed significant differences between species, NaCl and the species × NaCl interaction. A differential response between legumes to NaCl stress was observed. The most tolerant species to NaCl were Vigna unguiculata and Canavalia ensiformis showed a higher tolerance with respect to Lablab purpureus and Clitoria ternatea.
{"title":"Emergence capacity and seedlings early growth of four legumes in arid zones under NaCl-stress","authors":"F. Ruiz-Espinoza, J. Reyes-Pérez, F. Beltrán-Morales, B. Murillo-Amador, J. Rodríguez-Ortiz, P. Arce-Amezquita","doi":"10.47280/revfacagron(luz).v40.n2.10","DOIUrl":"https://doi.org/10.47280/revfacagron(luz).v40.n2.10","url":null,"abstract":"Legumes are used as fodder and green manures, because of fix nitrogen biologically. The objective of this study was to determine the emergence capacity and the early growth of four legume species treated with different NaCl-stress concentrations. The experiment was established in a completely randomized design with a factorial arrangement, where the first factor was the four legumes’ species (Vigna unguiculata L. Walp., Lablab purpureus (L.) Sweet, Clitoria ternatea L. and Canavalia ensiformis L. DC.) and the second factor was NaCl concentrations (0.25, 50, and 75 mM) with 16 treatments and four replications. The variables evaluated were emergence rate and percentage, stem and root length, fresh and dry weight of stem+leaves and root, stem and root length, stem diameter and the ratio of stems+leaves dry weight and roots dry weight (plant balance). The results showed that all variables expressed significant differences between species, NaCl and the species × NaCl interaction. A differential response between legumes to NaCl stress was observed. The most tolerant species to NaCl were Vigna unguiculata and Canavalia ensiformis showed a higher tolerance with respect to Lablab purpureus and Clitoria ternatea.","PeriodicalId":54470,"journal":{"name":"Revista De La Facultad De Agronomia De La Universidad Del Zulia","volume":"38 1","pages":""},"PeriodicalIF":0.2,"publicationDate":"2023-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87064261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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