AgriScientia最新文献_第10页

Crop yield estimation using satellite images: comparison of linear and non-linear models 利用卫星图像估算作物产量：线性和非线性模型的比较

AgriScientia Pub Date : 2018-06-29 DOI: 10.31047/1668.298X.V1.N35.20447

S. Sayago, M. Bocco

{"title":"Crop yield estimation using satellite images: comparison of linear and non-linear models","authors":"S. Sayago, M. Bocco","doi":"10.31047/1668.298X.V1.N35.20447","DOIUrl":"https://doi.org/10.31047/1668.298X.V1.N35.20447","url":null,"abstract":"Development of models for crop yield prediction using remote sensing allows accurate, reliable and timely estimations over large areas. articularly, this information is necessary to ensure the adequacy of a nation’s food supply as well as to aid policy makers and farmers. In Argentina, soybean (Glycine max (L.) Merr.) and corn (Zea mays L.) are the most important crops. The goal of this research was to develop and evaluate linear and non-linear models to estimate crop yield from satellite data. Particularly, we proposed and applied those models to obtain soybean and corn yield in the central region of Cordoba (Argentina) using Landsat and SPOT images. The models were designed taking into account all or some bands included in the images from one or both satellites. Results showed that models provided a good fit when all images are used, being superior the accuracy obtained by neural networks (NN). For soybean, the best estimation presented a coefficient of determination equal to 0.90 with NN and 0.82 with multiple linear regression models, and for corn 0.92 and 0.88, respectively. This study concludes that Landsat and SPOT images can be effectively used to predict, in early to mid-season crop growth stages, corn and soybean yield.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31047/1668.298X.V1.N35.20447","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43478747","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: 15

Evaluación de biomarcadores de estrés oxidativo en diferentes poblaciones de adultos de Cydia pomonella de la Patagonia argentina 阿根廷巴塔哥尼亚pomonella不同成虫群体氧化应激生物标志物的评价

AgriScientia Pub Date : 2018-06-29 DOI: 10.31047/1668.298X.V1.N35.20451

E. Maero, O. L. Anguiano

{"title":"Evaluación de biomarcadores de estrés oxidativo en diferentes poblaciones de adultos de Cydia pomonella de la Patagonia argentina","authors":"E. Maero, O. L. Anguiano","doi":"10.31047/1668.298X.V1.N35.20451","DOIUrl":"https://doi.org/10.31047/1668.298X.V1.N35.20451","url":null,"abstract":"En el ambiente natural, los organismos están expuestos a factores ambientales prooxidantes. En este trabajo se evaluaron biomarcadores antioxidantes en insectos adultos de Cydia pomonella de diferentes poblaciones de campo y de una cepa de laboratorio. Las poblaciones de campo provinieron de las provincias de Neuquén (Centenario), Río Negro (Allen, General Roca 1, General Roca 2, General Roca 3 y General Godoy) y Chubut (Sarmiento 1 y Sarmiento 2). Se determinaron antioxidantes enzimáticos –como catalasa (CAT), superóxido dismutasa (SOD) y glutatión S-transferasa (GST)– y no enzimáticos, nivel de glutatión (GSH) endógeno. Las actividades GST determinadas en las polillas provenientes de las poblaciones de campo resultaron significativamente menores a las medidas en la cepa de laboratorio. La actividad CAT detectada en los individuos provenientes de General Roca 1 resultó 2,13 veces menor a la de las polillas de laboratorio. No se observaron diferencias significativas entre poblaciones en los valores determinados de actividad SOD. El nivel de GSH determinado en las polillas de Sarmiento 2 resultó significativamente diferente y fue 1,57 veces mayor al de los individuos de laboratorio. Con excepción de las polillas provenientes de General Godoy, el resto de las poblaciones decampo presentó niveles significativamente menores comparados con el de la cepa de laboratorio. Las alteraciones observadas en los biomarcadores GST y GSH reflejarían indirectamente la presencia de estrés oxidativo.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31047/1668.298X.V1.N35.20451","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47196870","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

Evaluación de la virosis del achaparramiento de la alfalfa (Medicago sativa L.) en dos ambientes contrastantes de Argentina 阿根廷两种对比环境中紫花苜蓿(Medicago sativa L.)枯萎病的评价

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19042

A. Odorizzi, M. Cornacchione, V. Arolfo, D. Basigalup, M. L. Mijoevich, M. Balzarini

{"title":"Evaluación de la virosis del achaparramiento de la alfalfa (Medicago sativa L.) en dos ambientes contrastantes de Argentina","authors":"A. Odorizzi, M. Cornacchione, V. Arolfo, D. Basigalup, M. L. Mijoevich, M. Balzarini","doi":"10.31047/1668.298X.V34.N2.19042","DOIUrl":"https://doi.org/10.31047/1668.298X.V34.N2.19042","url":null,"abstract":"In the last years, it has been observed an increasing damage from a viral disease affecting the production and persistence of alfalfa in Argentina. The objective of this work was to compare the incidence and severity of the disease symptoms and to explore the relationship of its dynamics with respect to rainfall (pp) and temperature (T) in six commercial alfalfa cultivars during the period 2010-2014. The cultivars CW1010, WL1058, Traful PV INTA, WL903, Monarca SP INTA and LPS8500 were evaluated in trials at EEA Manfredi-INTA and at EEA Santiago del Estero-INTA. In both trials, mean incidences between 50% and 80% were recorded, with significant interannual variability and differences among cultivars. The severity was higher for the cultivars evaluated in Santiago del Estero. Cultivars WL903 and WL1058 presented the lowest severity, while LPS8500 and Monarca SP INTA showed the highest values. As for the climatic variables used for this analysis, pp (pp + irrigation in Santiago del Estero) and maximum T were the variables that mostly determined the incidence of the disease. Mean T was the most important variable regarding severity.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":"34 1","pages":"69-81"},"PeriodicalIF":0.0,"publicationDate":"2017-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43255146","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

Evaluación fenotípica y molecular de alelos de los genes Ppd-1 en una población biparental de trigo pan 小麦双亲本群体中Ppd-1等位基因的表型和分子评价

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19040

Lucio Andres Lombardo, M. M. Nisi, Celina Elena Ghione, G. D. Fisore, Marcelo E. Helguera

{"title":"Evaluación fenotípica y molecular de alelos de los genes Ppd-1 en una población biparental de trigo pan","authors":"Lucio Andres Lombardo, M. M. Nisi, Celina Elena Ghione, G. D. Fisore, Marcelo E. Helguera","doi":"10.31047/1668.298X.V34.N2.19040","DOIUrl":"https://doi.org/10.31047/1668.298X.V34.N2.19040","url":null,"abstract":"El constante incremento de las temperaturas –como consecuencia del cambio climatico– en las regiones donde se cultiva trigo, exige ajustar el ciclo del cultivo a periodos mas cortos para evitar o disminuir los estreses causados por las altas temperaturas. En este sentido, el descubrimiento de fuentes geneticas innovadoras de modulacion de la espigazon, asi como tambien el desarrollo de herramientas moleculares que permitan capitalizarlas, tienen un rol central en el mejoramiento de este cultivo. En el presente estudio se evalua, bajo condiciones controladas, el efecto de los genes Ppd-1 sobre la espigazon en una poblacion biparental de trigo pan. Para tal fin, se desarrollaron marcadores moleculares ineditos para los genes Ppd-A1 y Ppd-B1. Los resultados obtenidos muestran un efecto desigual de los loci Ppd-1 (Ppd-A1, Ppd-B1 y Ppd-D1) sobre la respuesta al fotoperiodo. Ppd-D1 fue el locus con mayor efecto sobre la respuesta al fotoperiodo, mientras que Ppd-B1 y Ppd-A1 presentaron un efecto menor y nulo, respectivamente. Se concluye de este estudio, que la estimulacion en condiciones de dias largos no es un proceso esencial para que se produzca la espigazon en el trigo.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":"34 1","pages":"45-57"},"PeriodicalIF":0.0,"publicationDate":"2017-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44550475","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

Actividad de cletodim y haloxifop R-metil en el suelo y su efecto fitotóxico en el cultivo de maíz (Zea mays) cletodim和haloxifop r -甲基在土壤中的活性及其对玉米(Zea mays)的植物毒性影响

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19043

D. Ustarroz, J. Montoya, A. Ledda, P. Belluccini, J. M. Cervellini

{"title":"Actividad de cletodim y haloxifop R-metil en el suelo y su efecto fitotóxico en el cultivo de maíz (Zea mays)","authors":"D. Ustarroz, J. Montoya, A. Ledda, P. Belluccini, J. M. Cervellini","doi":"10.31047/1668.298X.V34.N2.19043","DOIUrl":"https://doi.org/10.31047/1668.298X.V34.N2.19043","url":null,"abstract":"The herbicides haloxyfop R-methyl and clethodim may persist active in the soil causing phytotoxic effects to grass crops when applied close to sowing. In this work, field and greenhouse experiments were conducted to evaluate the phytotoxic potential of different rates of these herbicides in maize and to study the irrigation requirements and time between application and sowing to avoid phytotoxicity in the crop. Field experiments were carried out on four agroecological areas. Under field conditions the lower rates of both herbicides, 62.5 and 120 g i.a. ha-1 of haloxyfop R-methyl and clethodim respectively, produced visual phytotoxicity lower than 14 %. At higher rates, in two of the four environments higher levels of phytotoxicity (32-78 %) were registered. Both herbicides reduced maize plants biomass when they were not incorporated to the soil by irrigation and the sowing was carried out 14 days after their application. When irrigation was performed after the application of herbicides, 7 days were enough to avoid phytotoxicity at 62.5 and 125 g i.a. ha-1 of haloxyfop R-methyl and 120 g i.a. ha-1 of clethodim. None of the evaluated treatments reduced the plant biomass of maize planted 14 days after irrigation.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":"34 1","pages":"83-89"},"PeriodicalIF":0.0,"publicationDate":"2017-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.31047/1668.298X.V34.N2.19043","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46855469","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

Establecimiento in vitro de cuatro variedades de olivo cultivadas a campo (Olea europea L.) 四种田间橄榄品种(Olea europea L.)的离体建立

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19041

C. A. Turina, P. Bima

引用次数: 1

Cambios en los parámetros de calidad del trigo candeal durante el almacenamiento 小麦贮藏过程中品质参数的变化

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19038

V. Astiz, E. Errea, E. Molfese, M. L. Seghezzo

引用次数: 0

Producción de forraje de agropiro alargado en función de la disponibilidad de nitrógeno y la posición topográfica 牧草产量与氮有效性和地形位置的关系

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19044

P. Cicore, G. Berone, A. Prado, M. Agnusdei

引用次数: 1

Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina) 在阿根廷cordoba省中北部的molisoles中，直接播种对磷吸附过程的影响

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19036

A. Rollán, O. A. Bachmeier, M. Rossi, M. Moreno

{"title":"Efecto de la siembra directa sobre los procesos de adsorción de fósforo en los molisoles del centro norte de la provincia de Córdoba (Argentina)","authors":"A. Rollán, O. A. Bachmeier, M. Rossi, M. Moreno","doi":"10.31047/1668.298X.V34.N2.19036","DOIUrl":"https://doi.org/10.31047/1668.298X.V34.N2.19036","url":null,"abstract":"Under the hypothesis that the stratification of soil properties under directseeding conditions (SD) modifies P sorption parameters, the objectives of this work were: i) to estimate P sorption parameters by using Langmuir isotherms in samples of different depth, extracted from fields under continuous direct seeding; (ii) to analyze the similarities and differences between the parameters obtained; and (iii) to identify the relationship between the edaphic properties of the surface stratum and the estimated parameters. Soil samples of 0 to 5 and 0 to 20 cm were equilibrated with solutions with increasing concentrations of P. From the relationship between the adsorbed P and the concentration of P in equilibrium, the maximum adsorption capacity (Qmax) and the retention affinity constant (k) were estimated. The higher Qmax and the low k of 0 to 5 cm samples show that there is a distinct behaviour in the first centimeters of depth. In that layer the bioavailability of P and the residuality of the applied fertilizers are regulated by adsorption phenomena responding to the presence of organic colloids, which are accumulated by the stratification associated with SD.","PeriodicalId":39278,"journal":{"name":"AgriScientia","volume":"34 1","pages":"1-11"},"PeriodicalIF":0.0,"publicationDate":"2017-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47304221","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

Evaluación de la calidad tecnológica, nutricional y sensorial de barras de cereal con quinoa 藜麦谷物棒的工艺、营养和感官品质评价

AgriScientia Pub Date : 2017-12-27 DOI: 10.31047/1668.298X.V34.N2.19039

María Eugenia Steffolani, M. C. Bustos, M. Ferreyra, A. E. León

引用次数: 3