Revista Facultad Nacional de Agronomia Medellin最新文献_第4页

Epidemiological study of Colletotrichum spp. associated with Enterolobium cyclocarpum (Jacq.) Griseb. and Platymiscium pinnatum (Jacq.) Dugand in the Colombian Caribbean Region 与环状肠杆菌相关炭疽菌的流行病学研究Griseb。白颈白颈(jackq .)哥伦比亚加勒比海地区的Dugand

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2022-01-01 DOI: 10.15446/rfnam.v75n1.94723

Julian David Restrepo Leal, Deimys Friset Rada González, Alberto Rafael Páez Redondo

{"title":"Epidemiological study of Colletotrichum spp. associated with Enterolobium cyclocarpum (Jacq.) Griseb. and Platymiscium pinnatum (Jacq.) Dugand in the Colombian Caribbean Region","authors":"Julian David Restrepo Leal, Deimys Friset Rada González, Alberto Rafael Páez Redondo","doi":"10.15446/rfnam.v75n1.94723","DOIUrl":"https://doi.org/10.15446/rfnam.v75n1.94723","url":null,"abstract":"Epidemiological analyzes of foliar diseases associated with Colletotrichum spp. in Enterolobium cyclocarpum and Platymiscium pinnatum were performed under field conditions and without any type of intervention. At the Universidad del Magdalena (Santa Marta, Colombia), four trees for each species and four equidistant monitoring sites per tree were established. The incidence and severity were recorded for 33 weeks (March to November 2016), including two follow-up periods: dry and rainy season. Disease development curves were elaborated. Moreover, the development rate (r) and the area under the disease progress curve (AUDPC) were calculated for each follow-up period. The effect of the meteorological variables was statistically analyzed by correlation and multiple regression. In E. cyclocarpum, the highest incidence and severity were recorded between September and November with 100 and 19.6%, respectively, showing a positive correlation with relative humidity and negative with average temperature, solar radiation and wind speed. In P. pinnatum, the maximum values of incidence and severity were observed between March and April with 68.9 and 1.3%, respectively. However, correlation analyzes did not support their relationship with the environmental factors. The r values during the dry months were 0.136 and 0.107 units week-1 and the AUDPCs were calculated at 51 and 4 units week-1 for E. cyclocarpum and P. pinnatum, respectively. In the rainy months, the r values were 0.187 and 0.016 units week-1 and the AUDPCs were 186 and 2 units week-1, respectively. In conclusion, the development of the disease varies according to the forest species, time of year and some meteorological variables.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73942318","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}

引用次数: 0

Effect of organic and chemical fertilizers on the growth and production of soybean (Glycine max) in dry land 有机肥和化肥对旱地大豆生长和产量的影响

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.90967

R. Sandrakirana, Z. Arifin

{"title":"Effect of organic and chemical fertilizers on the growth and production of soybean (Glycine max) in dry land","authors":"R. Sandrakirana, Z. Arifin","doi":"10.15446/rfnam.v74n3.90967","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.90967","url":null,"abstract":"Soybean is known for its high protein content, which is the reason why it is widely used as one of the main food sources for humans and animals. In order to optimize soybean growth, farmers tend to add excessive dosage of chemical fertilizer to this crop. Furthermore, a continuous chemical fertilizer application without organic fertilizer addition may cause a rapid depletion of nutrients in the soil. This study aimed to evaluate the effectiveness of organic fertilizer treatment to reduce the amount of urea as chemical fertilizer needed in soybean cultivation. A complete randomized design was conducted using 21 treatments of organic and chemical fertilizer in triplicate with a 4x3 m plot size. Analysis of variance was carried out to compare the means of measurement data and Duncan multiple range test (DMRT 5%) was applied. The treatment 2,000 kg ha-1 compost + 50 kg ha-1 urea (O2K2A1) resulted the highest dry yield in soybean and had significant differences with urea-only treatment. A mixture of chemical and organic fertilizers had no significant result over the yield compared to the use of chemical fertilizer only. Compost application of 1,000-2,000 kg ha-1 with urea 50-100 kg ha-1 (O2K2A1 and O 2K1A2) showed an increase in seed yield of 35-38 % with a profit reaching 333-340 USD ha-1 compared to standard treatment using urea 50 kg ha -1 + SP-36 50 kg ha-1 + 50 KCl kg ha-1 (O0K0A1).","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87472381","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}

引用次数: 4

Phenolic compounds and in vitro antioxidant activity of six accessions of mashua (Tropaeolum tuberosum R. & P.) from Puno Region, Peru 秘鲁普诺地区6种麻花(Tropaeolum tuberosum R. & P.)的酚类化合物及其体外抗氧化活性

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.93020

Haim Behar Montes, Oscar Reátegui, Danae Marcela Liviac Muñoz, Jesús Heráclides Arcos Pineda, Iván Karlos Best Cuba

{"title":"Phenolic compounds and in vitro antioxidant activity of six accessions of mashua (Tropaeolum tuberosum R. & P.) from Puno Region, Peru","authors":"Haim Behar Montes, Oscar Reátegui, Danae Marcela Liviac Muñoz, Jesús Heráclides Arcos Pineda, Iván Karlos Best Cuba","doi":"10.15446/rfnam.v74n3.93020","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.93020","url":null,"abstract":"Mashua (Tropaeolum tuberosum R. & P.) is an Andean crop of high nutritional value and medicinal properties, which presents a great diversity in morphology and color. The aim of the study was to evaluate the content of phenolic compounds and in vitro antioxidant activity of the most economically important mashua accessions in the Puno Region, Peru. Six accessions of mashua (three purplecolored and three yellow-colored) were evaluated. The content of total polyphenols, total flavonoids and identification of phenolic compounds was determined by the Folin-Ciocalteu assay, aluminum chloride colorimetric method and HPLC-DAD, respectively. In vitro antioxidant activity was evaluated using the FRAP and DPPH assays. In general, the purple-colored mashua had a significantly higher content of total polyphenols, total flavonoids, and in vitro antioxidant activity compared to the yellowcolored mashua; being the Tt-23 accession purple-colored (peel/pulp, purple/purple), which presented a significantly higher content of phenolic compounds and in vitro antioxidant activity compared to the other accessions evaluated (P<0.05). Furthermore, a significant correlation was observed between FRAP and DPPH activities with the total content of polyphenols and flavonoids (P<0.01), as well as between FRAP activity and the caffeic acid and rutin levels (P<0.05). These results suggest that purple-colored mashua, particularly the Tt-23 accession (peel/pulp, purple/purple), has better nutraceutical and antioxidant properties due to its higher content of phenolic compounds.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77412321","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}

引用次数: 1

Studies on the nature of relationships between grain yield and yield-related traits in durum wheat (Triticum durum Desf.) populations 硬粒小麦(Triticum durum Desf.)群体籽粒产量与产量相关性状关系的本质研究

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.92488

Zahira Laala, A. Oulmi, Z. Fellahi, A. Benmahammed

{"title":"Studies on the nature of relationships between grain yield and yield-related traits in durum wheat (Triticum durum Desf.) populations","authors":"Zahira Laala, A. Oulmi, Z. Fellahi, A. Benmahammed","doi":"10.15446/rfnam.v74n3.92488","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.92488","url":null,"abstract":"This experiment was conducted at the Field Crops Institute, Agricultural Experimental Station of Setif (ITGC-AES), Eastern semi-arid areas of Algeria, during two successive cropping seasons, 2010/11 and 2011/12. The aim of the study was to evaluate the association of yield and yield-related traits and determine the direct and indirect effects of yield-related traits on grain yield. The plant materials consisted of 330 F3 and 174 F4 durum wheat lines along with their four parents and one control cultivar, which were evaluated under rainfed conditions in a semi-arid region. Data on nine agronomic traits were recorded. Sufficient genetic variability was observed among wheat traits as indicated by the minimum and maximum mean values and confirmed by the phenotypic and genotypic coefficients of variation that took intermediate and high estimates for most of the traits evaluated both in F3 and F4 generations. A high heritability (>60%) was observed for almost all the traits studied indicating the involvement of the additive action of genes in their genetic determinism. Results of stepwise regression and path analysis showed that biological yield, harvest index and number of spikes were the most determinant components of grain yield, exhibiting high positive direct effects (0.697, 0.683 and 0.293 in F3 vs 0.695, 0.205 and 0.560 in F4, respectively) coupled with positive and significant correlations (r=0.696*, r=0.778* and r=0.127* in F3 vs r=0.686*, r=0.628* and r=0.491* in F4, respectively) with this trait. These three yield-contributing traits can be considered as suitable indirect selection criteria to improve grain yield in the subsequent generation of the wheat breeding program.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86984749","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}

引用次数: 3

Use of phenolic compounds from cocoa pod-husks (Theobroma cacao L.) as inhibitors of Salmonella spp. in fresh cheese produced in Manabí, Ecuador 在厄瓜多尔Manabí生产的新鲜奶酪中使用可可豆荚壳中的酚类化合物作为沙门氏菌的抑制剂

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.90287

S. Santacruz, Pablo Medrano

{"title":"Use of phenolic compounds from cocoa pod-husks (Theobroma cacao L.) as inhibitors of Salmonella spp. in fresh cheese produced in Manabí, Ecuador","authors":"S. Santacruz, Pablo Medrano","doi":"10.15446/rfnam.v74n3.90287","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.90287","url":null,"abstract":"Cocoa pod-husk is a by-product of cocoa processing, underutilized despite its phenolic compounds that can be an alternative to preserve the microbiological quality of food. The aim of this work was to evaluate the in vitro inhibitory activity of phenolic compounds from the cocoa pod-husk against Salmonella spp, which is commonly found in fresh cheese produced in Manabí, Ecuador; as well as the effect on the sensory characteristics of cheese after immersion in a solution of phenolic compounds. In vitro microbiological analyzes of the inhibitory activity of phenolic compounds, showed that the concentrations 1 and 1.5% had the highest zone of inhibition against Salmonella spp., with mean diameters of 10.67 and 11.8 mm, respectively. On the other hand, the growth curve of Salmonella spp. indicated that 2 h were required for complete inhibition of bacteria by phenolic compounds at concentrations of 1 and 1.5%. For the sensory analyzes of cheese treated with phenolic compounds, 56.3% of the panelists accredited the firmness and odor with “I like it”, while 37.5% of the panelists qualified the color of the cheese with “I neither like nor dislike”. Firmness and odor had higher values of acceptance than color. For 25 and 12.5% of the panelists, firmness and odor were rated as “I like it a lot”, respectively, and 56.3% of the panelists conferred the label of “I like it” to both attributes. Cheese color was the lowest rated attribute, given that 12.5% of the panelists chose “I like it a lot” and 25% for “I like it”.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90526300","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}

引用次数: 1

Effect of Lactobacillus acidophilus added to a starch coating related to the microbiological contamination, quality and acceptability of fresh cheese 淀粉包衣中添加嗜酸乳杆菌对新鲜奶酪微生物污染、质量和可接受性的影响

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.90246

Stalin Santacruz Terán

{"title":"Effect of Lactobacillus acidophilus added to a starch coating related to the microbiological contamination, quality and acceptability of fresh cheese","authors":"Stalin Santacruz Terán","doi":"10.15446/rfnam.v74n3.90246","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.90246","url":null,"abstract":"The fresh cheese produced in the province of Manabí is an Ecuadorian artisan cheese. The processing conditions commonly do not comply Ecuadorian regulations, resulting in the presence of pathogenic microorganisms such as Salmonella. The high number of cases of Salmonellosis in the province of Manabí justifies the need to identify and control the possible sources of this pathogenic microorganism. In the present work, the effect of the addition of Lactobacillus acidophilus to fresh cheese was studied, by immersing it in a starch solution with 1x108 CFU mL-1 of L. acidophilus with further storage for 30 days at 4 °C. The pH, acidity, weight loss, instrumental firmness, number of CFU of mesophilic aerobic bacteria and acceptability of fresh cheese were analyzed. At the same time, a duo-trio analysis was carried out, followed by a satisfaction analysis with the participation of semi-trained panelists. The presence of L. acidophilus reduced the pH and acidity in the fresh cheese in relation to the control sample. Satisfaction results, on a five-point hedonic scale, which ranged from 1 (I dislike it very much) to 5 (I like it very much), showed that the cheese treated with L. acidophilus and the control sample received a rating between “I neither like nor dislike” and “I like it moderately”, with values of 3.63 for the treated sample and 3.50 for the control. The application of L. acidophilus did not affect the organoleptic acceptability of cheese and produced less changes in pH, acidity and weight loss during storage for 30 days at 4 °C in relation to the control sample.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80894403","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}

引用次数: 0

Chemical characterization, polyphenol content and antioxidant capacity of two pitahaya ecotypes (Hylocereus spp.) 两种火龙果生态型的化学特性、多酚含量及抗氧化能力

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.92821

Estefany Quispe Lupuche, J. C. Chávez Pérez, M. Medina-Pizzali, Lillyan Loayza Gutiérrez, Eder V. Apumayta Suárez

{"title":"Chemical characterization, polyphenol content and antioxidant capacity of two pitahaya ecotypes (Hylocereus spp.)","authors":"Estefany Quispe Lupuche, J. C. Chávez Pérez, M. Medina-Pizzali, Lillyan Loayza Gutiérrez, Eder V. Apumayta Suárez","doi":"10.15446/rfnam.v74n3.92821","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.92821","url":null,"abstract":"Pitahaya has originated worldwide interest due to its content of bioactive compounds with proven beneficial effects on health, acting as antioxidants against free radicals. This study aimed to evaluate the nutraceutical potential of the peel and pulp of the red (Hylocereus monacanthus) and yellow (Hylocereus megalanthus) pitahaya ecotypes for nutritional formulation purposes. Two pitahaya ecotypes were analyzed, obtaining a methanolic extract of the peel and edible part to perform the proximal chemical analysis, the phytochemical screening, and determine antioxidant activity by the DPPH, ABTS, and IC50 methods. Flavonoids, tannins, quinones, among other bioactive compounds were identified. Yellow pitahaya presented higher content of polyphenols and higher antioxidant activity by the ABTS method, while the average inhibition percentage for both ecotypes was 93% by DPPH method. IC50 was higher for the edible part of red pitahaya with 1.68 mg mL-1. Both ecotypes have a high content of polyphenols and a high antioxidant capacity, which agree with those found in different studies such as those of Colombia, Brazil and Korea, being as high or even higher than most varieties of citrus fruits in Peru. Future studies should consider the inclusion of other metabolites and bioactive substances such as betalains due to their antioxidant activity. Both pitahaya ecotypes are rich in antioxidants, bioactive compounds, have low energy density, and may be suitable for food prescriptions as a functional ingredient in food industry.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84134003","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}

引用次数: 3

Postharvest characterization of seven arracacha cultivars (Arracacia xanthorrhiza Bancroft) 7个Arracacia (Arracacia xanthorrhiza Bancroft)品种的采后特性

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.92658

Mayra Alejandra Rincón Rueda, Hernán David Ruiz Berrio, Julian Mauricio Molano Díaz, Javier Giovanni Alvarez Herrera, Yomaira Liney Pinto Acero

{"title":"Postharvest characterization of seven arracacha cultivars (Arracacia xanthorrhiza Bancroft)","authors":"Mayra Alejandra Rincón Rueda, Hernán David Ruiz Berrio, Julian Mauricio Molano Díaz, Javier Giovanni Alvarez Herrera, Yomaira Liney Pinto Acero","doi":"10.15446/rfnam.v74n3.92658","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.92658","url":null,"abstract":"La arracacha está considerada dentro de un esquema de agricultura familiar como un cultivo fundamental para la seguridad alimentaria por su aporte energético. En Colombia existen una gran diversidad de cultivares que han sido poco estudiados. Por lo anterior, se caracterizó la calidad poscosecha y el contenido de almidón de siete cultivares de arracacha. Se empleó un diseño completamente al azar con siete tratamientos, conformados por los cultivares ‘yema de huevo’, ‘paliverde’, ‘palirrusia’, ‘yucatana’, ‘blanca de tarro’, ‘palinegra’ y ‘amarilla de tarro’. Los resultados mostraron que el pH, los sólidos solubles totales, y la relación de madurez aumentaron para todos los cultivares excepto para el cultivar ‘palinegra’ durante los primeros ocho días después de la cosecha. La acidez total titulable disminuyó para ‘amarilla de tarro’ y en los demás cultivares se presentó un ligero aumento en el tiempo. La intensidad respiratoria y la firmeza aumentaron en todos los cultivares hasta el día 12, con mayores valores para ‘palinegra’. El contenido de almidón, la intensidad respiratoria y la firmeza disminuyeron, mientras L* aumentó. La pérdida de masa presentó los mayores valores en los primeros 3 días de almacenamiento. El índice de color y los parámetros L* y b* aumentaron a través del tiempo, por lo que se apreciaron incrementos en la luminosidad y en las coloraciones amarillas. ‘Paliverde’ mostró los mayorescontenidos de almidón, por lo que sería el cultivar menos apto para las industrias.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80225328","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}

引用次数: 2

Comparison of statistical indices for the evaluation of crop models performance 作物模型性能评价统计指标的比较

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.93562

Tatiana María Saldaña Villota, José Miguel Cotes Torres

引用次数: 2

Response of soybean crop with different combinations of seed treatment and application of nitrogen, cobalt, and molybdenum topdressing 大豆作物对不同种子处理及氮钴钼追肥组合的响应

Revista Facultad Nacional de Agronomia Medellin Pub Date : 2021-09-01 DOI: 10.15446/rfnam.v74n3.92760

L. Moro, M. Franz, Martios Ecco, Milciades Ariel Melgarejo Arrúa, Marlon Akiyama Ribas

{"title":"Response of soybean crop with different combinations of seed treatment and application of nitrogen, cobalt, and molybdenum topdressing","authors":"L. Moro, M. Franz, Martios Ecco, Milciades Ariel Melgarejo Arrúa, Marlon Akiyama Ribas","doi":"10.15446/rfnam.v74n3.92760","DOIUrl":"https://doi.org/10.15446/rfnam.v74n3.92760","url":null,"abstract":"Nitrogen is the element most demanded by the soybean crop, and the biological fixation of atmospheric nitrogen is the main means to supply it. In contrast, micronutrients and chemical treatments applied on seeds together with the inoculant can alter the phenomenon of biological fixation of atmospheric nitrogen. This work aimed to evaluate the effect of chemical products, micronutrients, and nitrogen fertilization on the nodulation, development, and yield of soybean. The experiment was developed in a field and a greenhouse in the municipality of Toledo, Brazil. A randomized block with four repetitions was used as an experimental design. This design had eight treatments, namely: T1 - Control (seeds treated with insecticide); T2 - Seeds treated with insecticides and inoculated with Bradyrhizobium; T3 - Untreated seeds inoculated with Bradyrhizobium; T4 Seeds treated with insecticides and cobalt-molybdenum (CoMo), inoculated with Bradyrhizobium; T5 - Seeds with CoMo inoculated with Bradyrhizobium; T6 - Seeds treated with insecticides, inoculated with Bradyrhizobium and with foliar application of CoMo; T7 - Seeds treated with insecticides, inoculated with Bradyrhizobium and with the application of nitrogen in cover; T8 - Seeds treated with nitrogen by broadcast. No significant differences were observed between treatments on the nodules numbers, stem diameter, plant height, root length, the mass of 1000 grains, and yield. The application of nitrogen at the R2 stage (a plant with an open flower in one of the two uppermost nodes of the main stem with a fully developed leaf) and in association with the inoculant + CoMo without seed treatment provided a greater number of nodes, pods, and grains per plant.","PeriodicalId":37747,"journal":{"name":"Revista Facultad Nacional de Agronomia Medellin","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89007824","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}

引用次数: 0