Terra Latinoamericana最新文献

{"title":"Fertilización foliar con nanopartículas de ZnO y su efecto en la producción, calidad biofísica y nutraceútica en frutos de nogal pecanero (Carya illinoinensis)","authors":"Karla Lucero Estrada-Arellano, Cirilo Vázquez-Vázquez, Rebeca Betancourt-Galindo, María Dolores Muy-Rangel, Luis Manuel Valenzuela-Núñez, José Luis García-Hernández, Miguel Ángel Gallegos-Robles","doi":"10.28940/terra.v41i0.1585","DOIUrl":"https://doi.org/10.28940/terra.v41i0.1585","url":null,"abstract":"El nogal pecanero (Carya illinoinensis) es uno de los cultivos más importantes de la Comarca Lagunera. La deficiencia de zinc (Zn) es uno de los principales problemas que limitan su productividad. La nanotecnología incluye materiales nutrimentales con los que se pueden sustituir fertilizantes convencionales con variado efecto en rendimiento, calidad biofísica y nutracéutica en el fruto. Los efectos de la aplicación foliar de nanopartículas de ZnO en nogal pecanero variedad Western fueron evaluados mediante dosis de Zn con los siguientes tratamientos: control, 4000 (ZnSO4), 2000 (nps ZnO), y 4000 (nps ZnO) mg L-1. El diseño experimental fue en bloques al azar con cuatro repeticiones. Las variables evaluadas en fruto y árbol fueron: rendimiento, número de nueces kg-1, largo y ancho de nuez, concentración de Zn en foliolos, ácidos grasos, proteína cruda, porcentaje de grasa y humedad. Se observó diferencia significativa en rendimiento y nivel de Zn en los foliolos, donde el mejor tratamiento fue 4000 mg L-1 de nanopartículas de ZnO, mientras que para la variable largo de nuez se observó diferencia significativa, siendo inferior el tratamiento de 4000 mg L-1 de ZnSO4. En las variables nutracéuticas, el contenido de ácidos grasos evaluado mediante el contenido de grasas saturadas (C16:0 y C18:0) mostró cambios altamente significativos, siendo el tratamiento con la dosis de 4000 mg L-1 de nanopartículas el que tuvo mayor porcentaje. Los ácidos grasos insaturados (C18:1 y C18:3) mostraron diferencias significativas, siendo los tratamientos evaluados con nanopartículas los que tuvieron un porcentaje inferior. El contenido de proteína también mostró diferencias altamente significativas, siendo el tratamiento control y el químico a base de ZnSO4 los tratamientos superiores. Las nanopartículas pueden ser usadas para mejorar el rendimiento y abastecer el contenido de Zn al cultivo, pero la calidad de fruto se ve afectada desde el punto de vista nutricional.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135607994","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}

{"title":"Relaciones entre riqueza de plantas vasculares y tipos funcionales: Modelos riqueza-área y especies-tipos funcionales","authors":"Fernando Paz-Pellat, Alma Velázquez-Rodríguez, Cristóbal Sánchez-Sánchez, Martín A. Bolaños-González","doi":"10.28940/terra.v41i0.1614","DOIUrl":"https://doi.org/10.28940/terra.v41i0.1614","url":null,"abstract":"La relación riqueza de especies – área es considerada una de leyes generales en ecología. A través de la riqueza de tipos funcionales se amplía el alcance de la riqueza de especies hacia enfoques de evaluación de la redundancia funcional de la vegetación en plantas vasculares. El objetivo de la investigación fue desarrollar y evaluar de un modelo de la relación riqueza-área y riqueza-especies y tipos funcionales. Para la relación riqueza-área en la literatura abundan los modelos empíricos, donde sobresalen el potencial y el logarítmico. Estos modelos, además de un modelo polinómico de segundo orden, pueden ser utilizados para definir la relación riqueza de especies (S) y de tipos funcionales (Sg). Un modelo propuesto por los autores se basa en la cinética de orden n, en el cual el modelo logarítmico y el potencial son casos particulares. En el análisis de los ajustes estadísticos de los modelos considerados, se utilizó una base de datos de la relación riqueza de especies y de tipos funcionales con relación al área de muestreo (A). Los resultados de la aplicación de regresiones no lineales muestran que el modelo de cinética de orden n resultó ser el modelo con mejor ajuste experimental, aunque los modelos potencial y logarítmico se consideran viables.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135607853","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}

{"title":"Remediación de suelos contaminados con hidrocarburos empleando sustancias húmicas de vermicomposta","authors":"Marcia E. Ojeda-Morales, Yolanda Córdova-Bautista, Juan G. Álvarez-Ramírez, José de los S. López-Lázaro, Gabriel Martínez-Pereyra, Carlos M. Morales-Bautista","doi":"10.28940/terra.v41i0.1656","DOIUrl":"https://doi.org/10.28940/terra.v41i0.1656","url":null,"abstract":"La biorremediación utilizando sustancias húmicas es una de las técnicas recientes y prometedoras para la restauración de suelos contaminados por hidrocarburos, pero existe poca información sobre su comportamiento en los diversos tipos de suelo. Por estas razones, esta investigación tuvo como objetivo evaluar la remoción de hidrocarburos totales del petróleo o HTP en tres suelos con diferentes texturas (S1, S2 y S3) y tratados con enmiendas orgánicas de vermicomposta (cascarillas de cacao, Theobroma cacao; arroz, Oriza sativa; bagazo de caña, Saccharum of ficinarum; estiércol de vaca) y sustancias húmicas comerciales (humato de potasio). Se planteó un diseño experimental multifactorial aleatorio (3 × 3 × 2), constituido por tipo de suelo, enmienda orgánica (sin vermicomposta, con vermicomposta orgánica, con sustancias húmicas comerciales), y carga microbiana (con microorganismos, sin microorganismos). Los resultados fueron analizados mediante las pruebas ANOVA-Tukey en el programa Statgraphics Centurion TM V.18 (α = 0.05) con el fin de evaluar diferencias significativas entre los tratamientos. Los resultados muestran que S2 con vermicomposta orgánica tuvo la mayor remoción (86% de HTP) luego de 60 días de incubación, en comparación con el tratamiento con sustancias húmicas comerciales, relacionándose con la baja biodisponibilidad de microorganismos. Este comportamiento también se observó en S3, el cual tuvo un porcentaje de remoción de HTP de 77.52 y 63.4%. Finalmente, la tasa de crecimiento celular fue mejor en S2 con sustancias húmicas comerciales. Se obtuvo un crecimiento promedio de 94×104 UFC g-1 de suelo durante los 60 días de evaluación del experimento, y un máximo de 98×105 UFC g-1 de suelo a los 45 días de tratamiento. Se concluye que el uso de vermicomposta es adecuada para suelos arcillosos, ya que las tasas de degradación son mayores en ellos. Además, representan una alternativa de menor costo que los tratamientos sintéticos y de revalorización de residuos orgánicos.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-07-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135607852","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}

{"title":"The potential of Mimosa pigra to restore contaminated soil with anthracene and phenanthrene","authors":"V. Pérez-Hernández, L. Ventura-Canseco, F. Gutiérrez-Miceli, I. Pérez-Hernández, Mario Hernández-Guzmán, S. Enciso-Sáenz","doi":"10.28940/terra.v38i4.603","DOIUrl":"https://doi.org/10.28940/terra.v38i4.603","url":null,"abstract":"Pérez-Hernández, V., L. M. C. Ventura-Canseco, F. A. Gutiérrez-Miceli, I. Pérez-Hernández, M. Hernández-Guzmán, and S. Enciso-Sáenz. 2020. The potential of Mimosa pigra to restore contaminated soil with anthracene and phenanthrene. Terra Latinoamericana 38: 755-769. DOI: https://doi.org/10.28940/terra.v38i4.603 Received: August 30, 2019. Accepted: May 21, 2020. Published in Terra Latinoamericana 38: 755-769. The potential of Mimosa pigra to restore contaminated soil with anthracene and phenanthrene Potencial de Mimosa pigra para restaurar suelos contaminados con antraceno y fenantreno","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"86 1","pages":"755-769"},"PeriodicalIF":0.0,"publicationDate":"2020-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74201050","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}

{"title":"Grain yield and population densities of new corn hybrids released by the INIFAP and UNAM for the High Valleys of Mexico†","authors":"Margarita Tadeo-Robledo, A. Espinosa-Calderón, Enrique I. Canales-Islas, C. López-López, Benjamín Zamudio-González, A. Turrent-Fernández, N. Gómez-Montiel, M. Sierra-Macías, A. Martínez-Gutiérrez, Roberto Valdivia-Bernal, P. Andrés-Meza","doi":"10.28940/terra.v38i3.557","DOIUrl":"https://doi.org/10.28940/terra.v38i3.557","url":null,"abstract":"In Mexico, corn (Zea mays L.) is one of the most important cereals from the alimentary, industrial, social, political, and cultural points of view. It is grown in different agroecological niches, water regimes, and management systems. The objective of the present research work was to study the optimum plant density per area unit and its effect on grain yield and agronomical characteristics of different corn hybrids. Six corn hybrids (H-51 AE, H 53 AE, H 47 AE, H 49 AE, Tsiri PUMA, and H-48) and three plant densities (50 000, 65 000, and 80 000 plants ha-1) were evaluated. Sowing was done during the spring-summer season, 2015, in field owned by the FESC-UNAM and CEVAMEX-INIFAP. A completely randomized block design was used with four replicates. Significant differences (P ≤ 0.05) were detected for genotypes (G) in the variables of grain yield, plant height, ear height, days to male and female flowering, volumetric weight, grain weight, ear length, and grains per ear. Moreover, the effect of the environment (E) was significant (P ≤ 0.05) for the same variables, with the exception of ear length. No significant differences (P ≥ 0.05) were registered for the densities factor (D). Only the G×E interaction had significant differences (P ≤ 0.05) in the grain yield trait. The better environment was CEVAMEX, with a mean yield of 5497 kg ha-1. The Tsiri PUMA hybrid had the best grain yield with 5856 kg ha-1. Although there were no differences for the studied interactions, the 65 000 plants ha-1 population density was the most appropriate. The densities factor did not affect the performance of the evaluated hybrids. Therefore, we recommend using 65 000 plants ha-1 to avoid investing in large amounts of seeds.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"40 1","pages":"507-515"},"PeriodicalIF":0.0,"publicationDate":"2020-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79968352","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}

{"title":"Dinámica de carbono en agregados del suelo con diferentes tipos de usos de suelo en el monte Tláloc, Estado de México","authors":"Edgar Barrales-Brito, Fernando Paz-Pellat, J. Etchevers-Barra, C. Hidalgo-Moreno, A. Velázquez-Rodríguez","doi":"10.28940/TERRA.V38I2.680","DOIUrl":"https://doi.org/10.28940/TERRA.V38I2.680","url":null,"abstract":"Changes in land use influence the carbon dynamics in ecosystems given these modify the soil structure and increase the mineralization rates of organic matter. In this study, we evaluated the effect of soil use, depth and size of aggregates on carbon (C) and soil respiration (CO2) content emitted by the mineralization of C in soils with different land uses (forestry, acahual, grassland and agricultural) in Mount Tlaloc. Soil C was higher in forest ecosystems (over 100 g C kg-1 of soil) than in soils with agricultural, acahual and grassland use with 20, 30 and 50 g C kg-1 of soil, respectively. In sites with forest land use, mean weighted diameter values were larger than 1.5 mm and a greater percentage of macroaggregates (>2 mm; >25%) was found, which indicated a better soil structure in the first 30 cm depth with respect to the site with agricultural use, where microaggregates were predominant (< 0.5 mm) with percentages higher than 50%, and a lower amount of C (less than 10 g C kg-1 of soil) was detected, as well as a higher amount of CO2 emitted by respiration (greater than 40 g CO2 kg-1 of soil). The soil structure stability influenced the dynamics of C, given that a better soil structure presented a higher content of C and a decrease of CO2 emissions of the soil.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"11 1","pages":"275-288"},"PeriodicalIF":0.0,"publicationDate":"2020-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91156863","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}

{"title":"Efectos de medicamentos homeopáticos en indicadores fisiológicos y del desarrollo inicial del frijol Yorimón (Vigna unguiculata L., Walp.)","authors":"José Manuel Mazón Suástegui, Carlos Michel Ojeda, Milagro Ramona García Bernal, Daulemys Batista Sánchez, Alonso Daniel Gurrola Mesa, Erika Mesa Zavala","doi":"10.28940/terra.v38i1.581","DOIUrl":"https://doi.org/10.28940/terra.v38i1.581","url":null,"abstract":"La medicina homeopatica es una disciplina de la ciencia medica universal, con aplicacion creciente en humanos, animales y plantas. La aceptacion de la homeopatia agricola se incrementa por la inocuidad y probada efectividad de sus medicamentos ultradiluidos y agitados, para estimular la germinacion, crecimiento, desarrollo y produccion de varias especies vegetales. El presente trabajo tuvo como objetivo evaluar el efecto de medicamentos homeopaticos en indicadores f isiologicos y del desarrollo, en frijol Yorimon (Vigna unguiculata L., Walp.) var. Pacena. Se uso un diseno completamente al azar con dos tratamientos homeopaticos, Manganum metallicum 31CH (MnM-31CH), Magnesium-manganum phosphoricum 3CH (MaMnP-3CH) y como tratamiento control agua destilada (AD), con seis replicas por tratamiento. Se evaluo tasa fotosintetica, transpiracion, clorof ila total, area foliar y biomasa fresca y seca de raiz, tallo y hojas. Se aplico un analisis de varianza y cuando hubo diferencia signif icativa entre tratamientos, una comparacion de medias (Tukey HSD, P ≤ 0.05). Los resultados revelaron un incremento signif icativo para todas las variables evaluadas con respecto al tratamiento control (AD), en las plantas que recibieron tratamientos homeopaticos (MnM-31CH y MaMnP-3CH). La biomasa fresca de raiz fue la variable de respuesta con mayor incremento porcentual (111.2%) y se registro en las plantas tratadas con MnM-31CH, comparado con las plantas del grupo control, sin medicacion homeopatica (AP). Igualmente, en las plantas tratadas (MnM-31CH y MaMnP-3CH) se registro un incremento superior al 40% en clorof ila total y en fotosintesis. Esto conf irma la efectividad de los tratamientos aplicados y el potencial de la homeopatia agricola para incrementar ef iciencia en el cultivo de V. unguiculata.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"17 1","pages":"125-135"},"PeriodicalIF":0.0,"publicationDate":"2020-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74284855","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}

{"title":"Respuesta del frijol común (Phaseolus vulgaris L.) variedad Quivicán a la aplicación de medicamentos homeopáticos","authors":"Milagro Ramona García Bernal, Carlos Michel Ojeda Silvera, Daulemys Batista Sánchez, Fernando Abasolo Pacheco, José Manuel Mazón Suástegui","doi":"10.28940/terra.v38i1.583","DOIUrl":"https://doi.org/10.28940/terra.v38i1.583","url":null,"abstract":"Se evaluo la respuesta de Phaseolus vulgaris L. variedad Quivican, a la aplicacion de medicamentos homeopaticos como promotores del crecimiento durante su desarrollo vegetativo inicial. Se aplico un diseno experimental completamente al azar con tres tratamientos homeopaticos: TH1 [MgM-31CH (Magnesium metallicum 31 CH)], TH2 [MaMnP-3CH (Magnesium-Manganum phosphoricum)], TH3 [TH1 + TH2), y agua destilada como Control. Los analisis mostraron los mejores resultados en las plantas que recibieron TH3, con incrementos signif icativos (P ≤ 0.05) respecto al control en las siguientes variables de respuesta: longitud del tallo (47.14%) y de raiz (30.27%); biomasa fresca de raiz (13.57%), de hojas (68.36%) y tallo (11.88%); biomasa seca de hojas (84.72 %) y tallo (36.11%); area foliar (21.74%); diametro del tallo (39.54%) y numero de hojas (16.66%). Estos resultados conf irman que la homeopatia agricola es una alternativa eco-amigable y tecnologicamente viable para el cultivo de frijol, porque al estimular el crecimiento permite la obtencion de plantas mas vigorosas con mayor potencial productivo y menos dependientes de los agroquimicos. En virtud de que los medicamentos homeopaticos son inocuos, tambien se mejora el equilibrio del agroecosistema, logrando un impacto positivo a corto, mediano y largo plazo; aplicable en la produccion agricola convencional y organica.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"33 1","pages":"137-147"},"PeriodicalIF":0.0,"publicationDate":"2020-02-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89188699","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}

{"title":"Plant-available water, stem diameter variations, chlorophyll fluorescence, and ion content in Pistacia lentiscus under salinity stress","authors":"M. A. Castillo-Campohermoso, F. Broetto, A. M. Rodríguez-Hernández, L. A. A. Soriano-Melgar, O. Mounzer, M. J. Sánchez-Blanco","doi":"10.28940/terra.v38i1.510","DOIUrl":"https://doi.org/10.28940/terra.v38i1.510","url":null,"abstract":"The aim of this study was to investigate the physiological and hydric adaptability of Pistacia lentiscus (lentisco) to saline irrigation conditions. Plants of lentisco were subjected to four salinity treatments in the irrigation water (0, 50, 100 y 150 mM NaCl) during three months in a growth chamber in order to identify possible tolerance mechanisms to salinity stress. The results showed a reduction of aerial growth parameters, mainly in the 150 mM of NaCl treatment. The root biomass did not change; however, the root hydraulic conductivity was modif ied. This behavior was related with decreases in leaf water potential values both at morning and midday. With the increase of salinity in the irrigation water, the radial growth of stem of the plants was proportionally decreased, and Cl- and Na+ content at minimum and maximum illumination in leaves and roots increased. Stomatal conductance decreased in the plants with higher salinity level, although chlorophyll content and fluorescence were not affected by the salinity treatments. Although the growth rates were statistically affected in all the treatments, the plants were able to resist the salt stress through changes in the leaf structures, related to a reduction of water losses via transpiration.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"95 1","pages":"103-111"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73836617","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}

{"title":"Evaluation of two remediation techniques applied to a site impacted by petroleum production waters","authors":"A. Gómez-Mellado, C. M. Morales-Bautista, I. M. De la Garza-Rodríguez, S. Torres-Sánchez, Irma Sánchez-Lombardo","doi":"10.28940/terra.v38i1.564","DOIUrl":"https://doi.org/10.28940/terra.v38i1.564","url":null,"abstract":"Salinity in soils is a problem that has increased in recent years, in the Mexican southeast one of the main sources associated with these effects is the oil production water, affected congenital water. Although the chemical composition changes between one site and another, it is documented that its components can cause harmful effects on health and ecosystems. To recover the vocation to use recovery areas, different treatments have been established that eliminate standardized parameters, but others that may influence soil quality are not considered. Therefore, two treatment techniques of a soil contaminated experimentally with congenital waters were evaluated, these were; cation exchange and natural attenuation, the evaluation consists in comparing the physical and chemical properties of the control soil, treated and treated after one year, some heavy metals are also determined in all of them. In the results, it is modif ied that the pollutant causes changes in the soil, such as, pH reduction (neutral to acid), porosity (20%), f ield capacity (50%) and organic matter (50%), as well as an increase in salinity (without saline to saline) and densities (10%), it is also increased that the concentrations of Pb, Zn, Ni increase. Na, Fe and V and Ca and K were reduced. Both treatments reduce salinity, but natural attenuation shows better results than cation exchange, mainly in pH, f ield capacity and textures, but with higher concentrations of sodium with respect to the witness in both cases, the metals are below the regulatory limit before and after the treatment, but when compared with control soils a level of increase in V and Pb is noted, because the area is immersed in oil activities, it is advisable to carry out long-term bioaccumulation studies.","PeriodicalId":52301,"journal":{"name":"Terra Latinoamericana","volume":"179 1","pages":"77-89"},"PeriodicalIF":0.0,"publicationDate":"2020-01-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75371121","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}