Investigacion Agraria最新文献_第6页

Winter cover crops influence weed establishment and nitrogen supply to maize 冬季覆盖作物影响玉米杂草形成和氮素供应

Investigacion Agraria Pub Date : 2018-12-30 DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109

H. A. G. Villalba, D. R. Diaz, E. L. Schoninger, Carlos Andrés Leguizamón Rojas

{"title":"Winter cover crops influence weed establishment and nitrogen supply to maize","authors":"H. A. G. Villalba, D. R. Diaz, E. L. Schoninger, Carlos Andrés Leguizamón Rojas","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.100-109","url":null,"abstract":"Cover crops (CC) and crop rotation are key components of a sustainable crop production system. The objectives of this study were to (i) evaluate the effect of winter CC on nitrogen (N) supply to the subsequent maize crop, and to (ii) evaluate the effect of CC on soil cover and weed population. Three winter CC were evaluated: black oat (BO) (Avena strigosa Schieb), white lupin (WL) (Lupinus albus), and oilseed radish (OR) (Raphanus sativus L.), as single species and in a mix. The three CC mixes included: BO+WL; BO+OR; and OR+WL. In addition to CC treatments a set of five N application rates (0, 60, 120, 180, and 240 kg N ha-1) were included on plots under winter fallow (WF). The winter CC supplied plant-available N to the subsequent maize crop varying from 25 to 53 kg N ha-1 with BO and WL, respectively. The mix of CC varied less in N supply (38-42 kg N ha-1). Soil cover and weed suppression varied between CC. The results suggest that BO can be used to attain rapid soil cover. Black oats also provided better soil cover after CC flattening, likely due to the higher C:N ratio and slower residue decomposition. The higher C:N ratio may result in some N immobilization and reduced plant available N to the maize crop. However, BO also showed great weed suppression. Mixing CC is an alternative to merge the benefits of the individual species, enhancing the overall ecosystem services provided by them.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547615","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

Intellectual property and patents on medicinal uses and traditional knowledge 关于医药用途和传统知识的知识产权和专利

Investigacion Agraria Pub Date : 2018-12-30 DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99

Ramón Fogel

{"title":"Intellectual property and patents on medicinal uses and traditional knowledge","authors":"Ramón Fogel","doi":"10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.91-99","url":null,"abstract":"This article analyzes the traditional knowledge about the alleged medicinal properties of plants and their uses as part of the Commons having the protection of domestic law and international law. The uses of these plants are considered by ethnic indigenous Mbya Guarani and Paĩ Tavyterã of the Western region of Paraguay. Articles published in scientific journals in the region and in high-impact scientific journals are used as basically bibliographic research. Likewise, it was taken in advantage information contained in patent Patenscope databases. On the exploitation of these secondary data, it was taken into consideration, the result of ethnographic work in the region. Over 86 selected plants and considering the species in the investigation were registered 4,668 patents applied for and 2,715 granted patents; The National Directorate of Intellectual Property (Dirección Nacional de Propiedad Intelectual DINAPI) does not register patent applications from residents. It was found that large pharmaceutical corporations and food industry do not recognize the fair and equitable compensation established in treaties. To this extent it can be assumed that these corporations respond to the logic of accumulation by dispossession of common goods.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-12-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67547626","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

Nutritional Valuation of the sesame cake by in vivo and in vitro digestibility studies in sheep 绵羊体内和体外消化率研究芝麻饼的营养价值

Investigacion Agraria Pub Date : 2018-12-30 DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.118-126

G. Closs, O. L. V. Villalba, W. E. Stanley Spezini, M. P. C. Marmol, L. N. B. D. Paredes, J. R. Peralta, P. G. Castellani Rumich

引用次数: 0

Family Farming: an analysis of the production of traditional crops in the Department of Concepción - Paraguay 家庭农业:对Concepción -巴拉圭省传统作物生产的分析

Investigacion Agraria Pub Date : 2018-12-30 DOI: 10.18004/INVESTIG.AGRAR.2018.DICIEMBRE.136-142

N. Duarte, A. F. Silva, M. M. Schlindwein, B. Mendoza

引用次数: 0

First record of the mite Dichopelmus notus (Acari: Eriophyidae) in mate - tea crop from Tavaí, Caazapá, Paraguay 文章标题巴拉圭caazap<e:1> Tavaí马偶茶作物中首次记录的毛螨(蜱螨亚纲:毛螨科)

Investigacion Agraria Pub Date : 2018-12-30 DOI: 10.18004/investig.agrar.2018.diciembre.143-145

M. Ramírez, O. Arias, Natalia de Jesús Zelada, V. A. Gomez, G. D. Moraes

引用次数: 0

Replacing corn by dried citrus pulp in diets for lambs: productive performance and characteristics of non-carcass components 用干柑橘果肉代替羔羊日粮中的玉米:非胴体成分的生产性能和特性

Investigacion Agraria Pub Date : 2018-06-30 DOI: 10.18004/investig.agrar.2018.junio.1-10

Diego Avilio Ocampos Olmedo, D. Medina, Luis Alberto Alonzo Griffith, Carlos Alberto Lezcano

引用次数: 2

Influence of environmental factors on the zooplankton community of the artificial lagoons in Ñu Guasú Park, Central Department, Paraguay 环境因子对巴拉圭中部Ñu Guasú公园人工泻湖浮游动物群落的影响

Investigacion Agraria Pub Date : 2018-06-30 DOI: 10.18004/investig.agrar.2018.junio.58-66

G. A. Villalba Duré, Gilberto Antonio Benítez Rodas, Karina Beatriz Núñez Goralewski

引用次数: 1

Identificación molecular de Helicoverpa armígera (Noctuidae: Heliothinae) en el departamento de Amambay, Paraguay 巴拉圭Amambay省Helicoverpa armigera(夜蛾科:Heliothinae)的分子鉴定

Investigacion Agraria Pub Date : 2018-06-30 DOI: 10.18004/INVESTIG.AGRAR.2018.JUNIO.84-90

Marcos Arturo Ferreira Aguero, Enson Gusman Sosa, Osmar Arias

{"title":"Identificación molecular de Helicoverpa armígera (Noctuidae: Heliothinae) en el departamento de Amambay, Paraguay","authors":"Marcos Arturo Ferreira Aguero, Enson Gusman Sosa, Osmar Arias","doi":"10.18004/INVESTIG.AGRAR.2018.JUNIO.84-90","DOIUrl":"https://doi.org/10.18004/INVESTIG.AGRAR.2018.JUNIO.84-90","url":null,"abstract":"The Helicoverpa armigera (Noctuidae: Heliothinae) is a polyphagous and cosmopolitan pest distributed throughout South America. The objective of this research was to identify by PCR-RFLP molecular analysis, the presence of H. armigera in the Amambay region in Paraguay. Delta traps with sexual pheromone were deployed in the 2016/2017 season soybean crop distributed at the following locations: Pedro Juan Caballero, Zanja Pyta, Capitan Bado, Karapa’ĩ and Bella Vista Norte. Sampling cloth was used for collecting caterpillars. The collected specimens were sorted by external morphological characters, individualized in labeled jars containing pure alcohol. 24 samples were sent to the Arthropods Molecular Ecology Laboratory ESALQ/USP for identification by PCR-RFLP molecular analysis. Ten specimens of H. armigera belonging to Fortuna and Zanja Pyta were identified. Ten other specimens were identified as H. zea belonging to Cerro Cora'i, Captain Bado, Cerro Kuatia and Karapa’ĩ. The remaining four samples did not amplify by PCR-RFLP. The analysis revealed the occurrence of H. armigera in soybean and maize crops in the northern region of Paraguay.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45510273","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

Arboreal vegetation dynamics of the Estepa Seasonal Sabana in the Espinillo State Park 埃斯皮尼洛州立公园Estepa季节性Sabana的乔木植被动态

Investigacion Agraria Pub Date : 2018-06-30 DOI: 10.18004/investig.agrar.2018.junio.67-73

L. F. Watzlawick, Filemon Mokochinski, Luis Corrales, L. Zerbielli, Régis Villanova Longhi

{"title":"Arboreal vegetation dynamics of the Estepa Seasonal Sabana in the Espinillo State Park","authors":"L. F. Watzlawick, Filemon Mokochinski, Luis Corrales, L. Zerbielli, Régis Villanova Longhi","doi":"10.18004/investig.agrar.2018.junio.67-73","DOIUrl":"https://doi.org/10.18004/investig.agrar.2018.junio.67-73","url":null,"abstract":"This study aim to evaluate the dynamics of the main tree species in a seasonal steppe savannah community, located in the Espinilho Park, Barra do Quaraí RS, throughout a period of eight years (2001-2009). From information on the dynamics, it is possible to assess changes in vegetation structure, based on mortality, recruitment and growth rates of its individuals. Permanent sample plots of 1 ha (100 x 100 m), divided into subunits of 100 m2 (10 x 10 m) were established for data collection. All trees with diameter at breast height (DBH) ≥ 10 cm were measured. Throughout the study period, 178 individuals from eight different species were recorded. The species Aspidosperma quebracho-blanco, Vachellia caven, Prosopis nigra and Prosopis affinis represent 82.58% of all individuals, which 54.49% comprise Prosopis genus only. Individuals were distributed in eight diameter classes, although 91.57% of them were from the first three diameter classes. An annual recruitment rate of 1.61% and a 0.70% mortality rate were observed. The average increase in DBH between the years 2001 and 2009 was 0.053 cm/year. The studied area showed a change in the dynamics with an annual recruitment rate greater than the mortality, indicating that the community is still growing.","PeriodicalId":52991,"journal":{"name":"Investigacion Agraria","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2018-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48261397","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

Natural enemies of aphids (Hemiptera: Aphididae) present in wheat growing areas in Paraguay 巴拉圭小麦种植区的蚜虫天敌（半翅目：蚜科）

Investigacion Agraria Pub Date : 2018-06-30 DOI: 10.18004/INVESTIG.AGRAR.2018.JUNIO.78-83

Rebeca González Torres, L. G. Segnana, O. Arias, María Bernarda Ramírez De López

引用次数: 2