IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.5

Talison Eugenio Da Costa, Vitor R. Oliveira Maia, Jorge A. Da Silva Neto, Rosecleide Maia Da Silva, A. M. Paiva Negreiros, Rui Sales Júnior, Ioná S. Araújo Holanda

{"title":"Response of melon cultivars to infection by Macrophomina pseudophaseolina isolates and its effect on protein expression","authors":"Talison Eugenio Da Costa, Vitor R. Oliveira Maia, Jorge A. Da Silva Neto, Rosecleide Maia Da Silva, A. M. Paiva Negreiros, Rui Sales Júnior, Ioná S. Araújo Holanda","doi":"10.51372/bioagro353.5","DOIUrl":"https://doi.org/10.51372/bioagro353.5","url":null,"abstract":"It was studied the pathogenicity of Macrophomina pseudophaseolina isolates in melon seedlings and their influence on protein expression of the crop. For this purpose, two isolates of the fungus were inoculated in Golden and Cantaloupe melon seedlings using the toothpick method. Thirty days after inoculation, disease incidence and severity were assessed using pre-established scales; additionally, stem and root length and fresh weight was evaluated. Protein extraction from plant tissues was performed using the phenol/SDS precipitation method and quantification by the Bradford method. The protein samples were subjected to denaturing polyacrylamide gel electrophoresis (SDS-PAGE). Then, the existence of polymorphism and molecular weight of bands detected in the samples were evaluated. M. pseudophaseolina isolates caused root rot in all inoculated melon seedlings. However, the two isolates exhibited different degrees of aggressiveness to the seedlings. The isolates CMM-4801 and CMM-4771 caused an average symptom severity of 3.40 and 2.60, respectively, in both cultivars. The disease negatively affected seedling development by reducing root length, and stem and root fresh weight. Different polypeptide band patterns were verified between inoculated and control seedlings, indicating different protein expression due to biotic stress caused by the fungus. Moreover, different protein expression patterns were found between the inoculated seedlings, indicating a correlation between pathogen aggressiveness and host response.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48368326","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}

引用次数: 0

Geographic variation in total phenol content and specific leaf area, as antioxidant indicators, of maqui in central Chile 智利中部马奎酒总酚含量和比叶面积作为抗氧化指标的地理变化

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.6

Enrique Misle A., Estrella Garrido G., Hugo Contardo P., Besma Kahlaoui

{"title":"Geographic variation in total phenol content and specific leaf area, as antioxidant indicators, of maqui in central Chile","authors":"Enrique Misle A., Estrella Garrido G., Hugo Contardo P., Besma Kahlaoui","doi":"10.51372/bioagro353.6","DOIUrl":"https://doi.org/10.51372/bioagro353.6","url":null,"abstract":"The high content of antioxidants of maqui (Aristotelia chilensis (Mol.) Stuntz) has recently motivated an increase in the research on this species. This study evaluates the variation in phenolic antioxidants of maqui leaves in the Chilean province of Curicó according to geographical location and sun exposure, using total phenol content (TP) and specific leaf area (SLA) as indicators. Leaves were collected from natural populations inside the province, sampling 15 leaves and three replicates per geographic location. The relationships between SLA and TP, SLA and geographical location, and TP content and geographical location, were assessed in 20 locations within the province. TP varied from 118.36 to 201.9 mg∙g-1 (GAE) and SLA from 76.8 to 188.2 cm2∙g-1. In general, north facing plants exhibited the highest TP and the lowest SLA. When grouping sampled populations according exposure (north facing, south facing and valley), only north facing points resulted in a significant negative correlation with longitude (r= -0.980, P≤0.05), implicating that moving westward less phenol content would be found. TP and SLA varied according to exposure and geographical location. Correlation analysis revealed a significant negative relationship between SLA and TP (r = -0.56, P≤0.05), suggesting the use of this parameter as practical indicator of phenolic antioxidants in maqui.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43832423","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}

引用次数: 0

Estimation of genetic gains by different selection criteria in biofortified mini lettuce genotypes 利用不同选择标准估算生物强化迷你生菜基因型的遗传增益

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.1

Ana Carolina P. Jacinto, R. Castoldi, I. G. da Silva, Glecia J. Dos S. Carmo, G. Maciel, É. A. Moreira, Hamilton César De O. Charlo, R. R. Finzi

{"title":"Estimation of genetic gains by different selection criteria in biofortified mini lettuce genotypes","authors":"Ana Carolina P. Jacinto, R. Castoldi, I. G. da Silva, Glecia J. Dos S. Carmo, G. Maciel, É. A. Moreira, Hamilton César De O. Charlo, R. R. Finzi","doi":"10.51372/bioagro353.1","DOIUrl":"https://doi.org/10.51372/bioagro353.1","url":null,"abstract":"The development of mini lettuce genotypes with good agronomic characteristics are fundamental to launch new cultivars. Thus, the objective was to compare the variability of biofortified mini lettuce genotypes by analyzing its principal components and hierarchical clusters and evaluate different selection indices to estimate selection gain. The experiment was carried out at the Federal University of Uberlândia in a randomized block design implemented with 11 treatments (10 genotypes of mini lettuce generation F5:6 and one mini lettuce commercial cultivar) and four repetitions. The following variables were evaluated: chlorophyll content (SPAD índex), stem diameter and length, plant diameter and height, number of leaves per plant, fresh mass of the aerial part, and bolting tolerance. The data were submitted to analysis of variance and genotypes were compared using the Scott-Knott test (P≤0.05). Additionally, principal components, hierarchical clusters, and correlation were evaluated (P≤0.05). The best genotypes were chosen by appropriate direct and indirect selection and the main indices: William’s index, selection index from Smith and Hazel, and Mulamba y Mock index. There were five groups and a significant negative correlation of all agronomic characteristics evaluated with resistance to bolting, except stem length. William’s index provided a balanced distribution of genetic gains by selecting the genotypes UFU 66#8, UFU 215#2, UFU 215#7 and UFU 215#13.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43326572","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}

引用次数: 0

Hospedantes en frutales de importancia económica asociados a patógenos foliares del duraznero (Prunus persica L.) 桃子叶病原菌(Prunus persica L.)在具有重要经济意义的果树上的寄主

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.9

Ángel R. Ceballos-Chávez, Glenda J. Lizárraga-Sánchez, Karla Y. Leyva-Madrigal, Diana M. Mc Caughey-Espinoza, Leidy E. Chávez-García, Fernando A. Valenzuela- Escoboza, Blanca E. López-Valenzuela

{"title":"Hospedantes en frutales de importancia económica asociados a patógenos foliares del duraznero (Prunus persica L.)","authors":"Ángel R. Ceballos-Chávez, Glenda J. Lizárraga-Sánchez, Karla Y. Leyva-Madrigal, Diana M. Mc Caughey-Espinoza, Leidy E. Chávez-García, Fernando A. Valenzuela- Escoboza, Blanca E. López-Valenzuela","doi":"10.51372/bioagro353.9","DOIUrl":"https://doi.org/10.51372/bioagro353.9","url":null,"abstract":"En México, la presencia de hongos fitopatógenos ocasiona severos daños en frutos de durazno (Prunus persica L.), después de la cosecha, causando disminución en la exportación de productos procesados y en vida de anaquel. El objetivo de este trabajo fue describir el rango de hospedantes de hongos foliares en frutos de manzano (Malus domestica Borkh), fresa (Fragaria spp.), ciruela (Prunus domestica L.), pera (Pyrus communis L.) y membrillo (Cydonia oblonga Mill.), y en hojas de variedades de durazno. Para la prueba de patogenicidad se utilizó la técnica de aspersión y las enfermedades se valoraron mediante la escala de severidad de 5 grados de 0 a ≥75 % de presencia de síntomas sobre el fruto y del 10 a ≥60% para hoja desprendida y porcentaje de incidencia. Se inocularon conidios de Fusarium spp, Alternaria spp, Epicoccum spp, Collectotrichum spp y Monilinia spp., en todos los frutos y las hojas de las variedades de durazno amarillo, prisco y blanco, con siete repeticiones, dejando un testigo con agua destilada estéril para cada uno de los tratamientos; se colocaron en cámara húmeda en condiciones asépticas, a 27°C ± 1 y se sometieron a regímenes de 14 horas oscuridad y 10 horas luz, por 4, 7, 10 y 12 días. Los datos se sometieron a un análisis de varianza utilizando la comparación de medias de Tukey (P≤0.05). La variedad amarillo de durazno presentó mayor susceptibilidad a todos los hongos, los cuales fueron patogénicos a los hospedantes con severidad de 0 a 97,14 %.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47764362","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}

引用次数: 0

Germination and biomass partitioning in creole varieties of cowpea (Vigna unguiculata (L.) Walp.) under salinity conditions 豇豆克里奥尔变种的发芽和生物量分配在盐度条件下

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.3

Francisco H. Alves de Andrade, Ronimeire Torres da Silva, M. D. F. De Queiroz Lopes, M. A. Barbosa Neto, Antonia D. C. De Lima Ferreira, Maria I. Batista Clemente, Erisvaldo Silva de Oliveira

{"title":"Germination and biomass partitioning in creole varieties of cowpea (Vigna unguiculata (L.) Walp.) under salinity conditions","authors":"Francisco H. Alves de Andrade, Ronimeire Torres da Silva, M. D. F. De Queiroz Lopes, M. A. Barbosa Neto, Antonia D. C. De Lima Ferreira, Maria I. Batista Clemente, Erisvaldo Silva de Oliveira","doi":"10.51372/bioagro353.3","DOIUrl":"https://doi.org/10.51372/bioagro353.3","url":null,"abstract":"Saline soils can limit seedling germination and growth of the crops. This research sought to identify whether the cowpea varieties Pingo-de-ouro and Coruja are tolerant to salinity in terms of germination and biomass partitioning. A completely randomized design in a 2 x 4 factorial arrangement, totaling eight treatments with four replications was used. The treatments consisted of two varieties of cowpea in addition to NaCl salinity with four levels of electric conductivity (0.0, 3.3, 6.6 and 9.9 dS∙m-1). The variables analyzed were percentage of germination (PG), first germination count (FGC), germination speed index (GSI), average germination time (AGT), percentage of seedling (PSB), shoot (PSHB), root (PRB) and cotyledon (PCotB) biomass, PCotB/PSB ratio and salinity tolerance index (STI). The Pingo-de-ouro variety showed tolerance to 3.3 dS∙m-1 displaying an increase in PSB and PSHB, while the Coruja variety tolerated 6.6 dS∙m-1 with a more significant investment in PRB. Both displayed no significant statistical reduction in percentage of G, FGC, GSI, AGT, and STI up to 3.3 dS∙m-1 for the Pingo-de-ouro variety and 6.6 dS∙m-1 for the Coruja one. Thus, those genetic materials can be used to breed tolerant plants. The present research also provides results for further studies at physiological, molecular, and field conditions.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45003755","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}

引用次数: 0

Divergencias fenotípicas y variación entre acervos genéticos de tomate (Solanum lycopersicum L.) con base en heterogeneidad y ambiente 基于异质性和环境的番茄(Solanum lycopersicum L.)遗传收集的表型差异和变异

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.8

C. A. Guerrero-Ortíz, J. C. Carrillo-Rodríguez, J. L. Chávez-Servia, Aracely M. Vera-Guzmán, J. R. Enríquez-del Valle, E. N. Aquino-Bolaños, Jimena E. Alba Jiménez, Y. Villegas-Aparicio

{"title":"Divergencias fenotípicas y variación entre acervos genéticos de tomate (Solanum lycopersicum L.) con base en heterogeneidad y ambiente","authors":"C. A. Guerrero-Ortíz, J. C. Carrillo-Rodríguez, J. L. Chávez-Servia, Aracely M. Vera-Guzmán, J. R. Enríquez-del Valle, E. N. Aquino-Bolaños, Jimena E. Alba Jiménez, Y. Villegas-Aparicio","doi":"10.51372/bioagro353.8","DOIUrl":"https://doi.org/10.51372/bioagro353.8","url":null,"abstract":"Las variedades mejoradas homogéneas presentan escasa diversidad genética; en cambio, las variedades tradicionales poseen alta heterogeneidad en caracteres agronómicos, composición de fruto y se utilizan en mejoramiento genético. El objetivo fue evaluar la variación y divergencia fenotípica de tres grupos de acervos genéticos con diferente magnitud de heterogeneidad, en respuesta a dos ciclos de producción en invernadero. Se sembraron catorce híbridos triples inter-poblacionales, cuatro líneas avanzadas y cuatro híbridos comerciales, bajo un diseño de bloques al azar con cuatro repeticiones. Se evaluó la altura de la planta a los 30, 60, y 90 ddt (días después del trasplante), días a floración, fructificación y maduración del primer y quinto racimo, diámetro polar y ecuatorial, peso medio, número de frutos y rendimiento al quinto racimo. Se realizaron análisis de varianzas y comparación de medias según la prueba Tukey. Entre acervos genéticos fue similar el comportamiento de líneas avanzadas e híbridos inter-poblacionales en altura de planta, caracteres fisiológicos y de fruto, con diferencias significativas favorables respecto a los híbridos comerciales. Entre genotipos, los días a floración, fructificación y maduración de frutos del primer a quinto racimo se incrementaron en el ciclo septiembre 2017-marzo 2018 respecto al ciclo marzo-julio 2017. En la interacción de ciclo-acervo genético, respecto al diámetro ecuatorial, fue sobresaliente la respuesta de los híbridos inter-poblaciones H-76, H-77, H-79, H-90 y H-98 al poseer frutos de tipo riñón. Los resultados señalan que el efecto del ambiente, o ciclos de evaluación, representó la mayor proporción de la varianza fenotípica total, seguida del efecto de grupos de acervos genéticos y genotipos dentro de acervos.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44344391","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}

引用次数: 0

The effect of vermicompost treatments on yield and yield components of peanut (Arachis hypogaea L.) 蚯蚓堆肥处理对花生产量及产量构成的影响

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.4

Mustafa YILMAZ

{"title":"The effect of vermicompost treatments on yield and yield components of peanut (Arachis hypogaea L.)","authors":"Mustafa YILMAZ","doi":"10.51372/bioagro353.4","DOIUrl":"https://doi.org/10.51372/bioagro353.4","url":null,"abstract":"This study was conducted to determine the effects of vermicompost treatments on yield and yield components of peanut (Arachis hypogaea L.) under Osmaniye ecological conditions, in Türkiye, in 2020-2021. It was designed according a complete randomized block with three replications. The NC-7 peanut variety was treated with eight different treatments of vermicompost plus a control. The treatments T1 through T4 included soil and leaves applications at different plant development stages, and treatments T5 through T8 were similar to the previous four but included only application to leaves. The number of pods per plant, pod weight per plant, 100-pod and seed weight, shelling percentage, first quality pod ratio, first quality pod weight ratio, protein content, and pod yield were determined. The number of pods per plant varied between 23.3 (control) and 33.4 (T1). The lowest pod weight per plant was 37.7 g in control treatment, and the highest in T1 (51.4 g). Pod yield was between 3579 kg∙ha-1 (control) and 4873 kg∙ha-1 in T1. The 100-pod weight was the lowest from the control treatment (208.4 g) and the highest from the T6 treatment (254.2 g); the weight of 100 seeds was minimum in the control treatment with 88.5 g and maximum in T5, with 102.3 g. The protein content varied between 24.11% (control) and 26.01% (T5). These results indicate that under the ecological conditions of Osmaniye province, there is a significant effect of vermicompost on most productive and quality variables of peanut.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42400837","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}

引用次数: 0

Cadmium uptake and mycorrhization by cacao clones in agroforestry and monoculture systems of Peruvian Amazon 秘鲁亚马逊农林业和单一栽培系统中可可无性系对镉的吸收和菌根作用

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.7

G. Vallejos-Torres, Nery Gaona-Jimenez, Alberto Alva Arevalo, Christopher Paredes, Andi Lozano, Jorge Saavedra-Ramírez, Luis A. Arévalo, Keneth Reátegui, Wilfredo Mendoza-Caballero, César Marín

{"title":"Cadmium uptake and mycorrhization by cacao clones in agroforestry and monoculture systems of Peruvian Amazon","authors":"G. Vallejos-Torres, Nery Gaona-Jimenez, Alberto Alva Arevalo, Christopher Paredes, Andi Lozano, Jorge Saavedra-Ramírez, Luis A. Arévalo, Keneth Reátegui, Wilfredo Mendoza-Caballero, César Marín","doi":"10.51372/bioagro353.7","DOIUrl":"https://doi.org/10.51372/bioagro353.7","url":null,"abstract":"The production system influences the cadmium (Cd) content and mycorrhization in cocoa plantations. The objective of this study was to determine the effects of different production systems on Cd uptake and the presence of mycorrhizas in cacao clones in field conditions, in the Peruvian Amazon. Twelve subplots of 108 m2 were selected in representative cocoa cultivation systems under agroforestry (AF) and monoculture (MON), with the cocoa clones ICS and CCN. Significant differences and data distribution were evaluated using ANOVA, principal component analysis, and Tukey's tests. Mycorrhizal colonization was higher in the AF_ICS system (71.11%) while the length of the extraradical mycelium was higher in the AF_CCN system (17.23%). The highest Cd content in soils was found under the AF_CCN and AF_ICS systems, both with 0.39 mg kg-1. The Cd content in cacao roots, leaves, and beans were higher in the MON_CCN system with 1.87, 2.06, and 1.12 mg kg-1 respectively. Cocoa monocultures (with both clones) generally showed lower levels of mycorrhizal colonization than agroforestry systems, which in turn (also for both clones) presented higher Cd content in beans, even exceeding the limit established by the world health authorities.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":"1 1","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41357819","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}

引用次数: 0

Efecto del sombreado durante el establecimiento de Megathyrsus maximus cv Mombaza en asociación con Arachis pintoi Krapov en Ecuador 在厄瓜多尔与Arachis pintoi Krapov合作建立Megathyrsus maximus cv Mombaza期间遮荫的影响

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-08-31 DOI: 10.51372/bioagro353.2

L. Jácome-Gómez, Rosa Coromoto Razz-García, J. Jácome-Gómez

{"title":"Efecto del sombreado durante el establecimiento de Megathyrsus maximus cv Mombaza en asociación con Arachis pintoi Krapov en Ecuador","authors":"L. Jácome-Gómez, Rosa Coromoto Razz-García, J. Jácome-Gómez","doi":"10.51372/bioagro353.2","DOIUrl":"https://doi.org/10.51372/bioagro353.2","url":null,"abstract":"Esta investigación se realizó con el objetivo de evaluar el efecto del sombreado durante el establecimiento del pasto Megathyrsus maximus cv. Mombaza en asociación con Arachis pintoi Krapov, en Santo Domingo de los Tsáchilas, Ecuador. Se utilizó un diseño experimental de bloques completos al azar, con arreglo de tratamientos en parcelas divididas con tres repeticiones, donde se evaluaron tres factores en estudio: Sombra 40 %, 24 %, 10 % y sin sombra, monocultivo de Mombaza y en asociación con Arachis (70 y 30 %, respectivamente) y épocas del año (lluviosa y seca). Las variables evaluadas fueron: rendimiento de materia seca, relación hoja-tallo y contenido de proteína cruda. Los resultados muestran que la condición de establecimiento (monocultivo o asociado) no afectó (P>0,05) el desempeño del pastizal. Durante la época de lluvias se registró el mayor (P≤0,05) rendimiento de materia seca con 4,39 Mg∙ha-1∙corte-1 en comparación a la seca (3,77 Mg∙ha-1∙corte-1), mientras que existió una reducción significativa (P≤0,05) del rendimiento con un nivel de sombra del 40 %. Los mejores valores de la relación hoja:tallo se observaron con un nivel de sombra del 24 % en la época de lluvias con 2,87. El mayor contenido de proteína se observó en la época seca (11,7 %), en asociación con maní forrajero (11,9 %) y un promedio de 12,27 % bajo sombra. El cultivar Mombaza puede ser establecido en sistemas silvopastoriles con niveles medios de sombra que no afectan el rendimiento, pero mejoran su calidad.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42748233","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}

引用次数: 0

Residualidad y disipación de lufenuron aplicado en arveja en una zona semiárida e índice de peligro y riesgo por ingesta Lufenuron在半干旱地区应用于豌豆的残留和耗散以及摄入的危险和风险指数

IF 0.8 4区农林科学

Bioagro Pub Date : 2023-05-01 DOI: 10.51372/bioagro352.6

Jorge Álvarez-Vilca, Guido Sarmiento-Sarmiento, Laydy Mena-Chacón, Luis Lipa-Mamani

{"title":"Residualidad y disipación de lufenuron aplicado en arveja en una zona semiárida e índice de peligro y riesgo por ingesta","authors":"Jorge Álvarez-Vilca, Guido Sarmiento-Sarmiento, Laydy Mena-Chacón, Luis Lipa-Mamani","doi":"10.51372/bioagro352.6","DOIUrl":"https://doi.org/10.51372/bioagro352.6","url":null,"abstract":"La aplicación frecuente de pesticidas en cultivos hortícolas puede generar residuos con consecuencias adversas en la salud de los consumidores. El objetivo de este trabajo fue determinar la residualidad y disipación de lufenuron aplicado en arveja (Pisum sativum L.) y su índice de peligro y riesgo por ingesta. La investigación se realizó en campo de una zona semiárida ubicado en Arequipa–Perú. Los tratamientos fueron la aplicación de tres dosis del ingrediente activo lufenuron (12, 24 y 30 g·ha-1) en dos oportunidades (cada 4 y 8 días), conformándose seis tratamientos aplicados vía foliar en diseño completamente al azar, con tres repeticiones y 18 unidades experimentales. La detección de residuos en vainas y granos de arveja se efectuó mediante HPLC en muestras recolectadas a 4, 8 y 16 días después de la última aplicación. Se calculó la cinética de disipación, vida media, índice de peligro por ingesta o de riesgo para la salud (HI). Los mayores valores de vida media fueron 13,4 días en vainas y 4,8 días en granos con la dosis 24 g ha-1 y frecuencia de 8 días. La frecuencia de aplicación fue más relevante que la dosis de lufenuron, y la diferencia se detectó a los 4 días después de la última aplicación. Se obtuvo que los residuos de lufenuron en granos a 4 días de muestreo superaron los límites máximos de residuos en todos los tratamientos; no obstante, bajo las condiciones del ensayo, la ingesta de granos de arveja con residuos de lufenuron no representarían peligro y riesgo para la salud de la población.","PeriodicalId":55985,"journal":{"name":"Bioagro","volume":" ","pages":""},"PeriodicalIF":0.8,"publicationDate":"2023-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44927677","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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