Bragantia最新文献_第2页

Soil structural quality and development of second-crop corn intercropping with forage grasses under no-tillage 免耕条件下二季玉米与牧草间作土壤结构质量与发展

4区农林科学

Bragantia Pub Date : 2023-01-01 DOI: 10.1590/1678-4499.20230110

Camila Pereira Gagna, Osvaldo Guedes Filho, Maria Caroline Garcia Paschoal, Renata Bachin Mazzini-Guedes, Glécio Machado Siqueira

{"title":"Soil structural quality and development of second-crop corn intercropping with forage grasses under no-tillage","authors":"Camila Pereira Gagna, Osvaldo Guedes Filho, Maria Caroline Garcia Paschoal, Renata Bachin Mazzini-Guedes, Glécio Machado Siqueira","doi":"10.1590/1678-4499.20230110","DOIUrl":"https://doi.org/10.1590/1678-4499.20230110","url":null,"abstract":"The intercropping of corn with forage grasses increases soil cover and may improve soil structural quality. The objective of the study was to evaluate the soil structural properties and the development of second-crop corn intercropping with forage grasses under no-tillage system. The experiment was carried out in an area of Sítio Santo Antônio, located in the municipality of Borrazópolis, Paraná state, Brazil, on a Red Latosol with a very clayey texture. The experiment consisted of five treatments: corn + Urochloa brizantha cv. Marandu (T1), corn + Urochloa brizantha cv. Piatã (T2), corn + Urochloa brizantha cv. Xaraés (T3), corn + Urochloa ruziziensis (T4), and non-intercropping corn (T5). In the corn crop, the following characteristics were evaluated: plant height, first ear in insertion height, stem diameter, corn yield, dry mass of corn straw mulch, dry mass of grasses shoots and dry mass of grasses root. Dry mass of the aerial part and roots of the grasses were evaluated. In the 0–0.10 and 0.10–0.20-m soil depth, soil physical properties were also determined: tensile strength and friability, stability of aggregates, bulk density and total porosity, and degree of compactness. The treatments of corn in intercropping with grasses showed positive results regarding the stability of aggregates, reduction of bulk density and increase of total porosity in the 0–0.10-m soil depth. The intercropping of corn + U. ruziziensis showed the lowest values of degree of compactness and higher production of dry mass of the aerial part.","PeriodicalId":48845,"journal":{"name":"Bragantia","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135106741","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

Phosphite for the root rot (Rhizoctonia solani) management in common bean and compatibility with Rhizobium tropici 亚磷酸酯在普通豆根腐病管理中的应用及其与热带根瘤菌的相容性

4区农林科学

Bragantia Pub Date : 2023-01-01 DOI: 10.1590/1678-4499.20220155

Bruno Henrique Garcia Costa, Mário Lúcio Vilela de Resende, Ana Cristina Andrade Monteiro, Matheus Henrique Brito Pereira, Alexandre Ribeiro Maia de Resende, Gustavo Pucci Botega, Deila Magna dos Santos Botelho

{"title":"Phosphite for the root rot (Rhizoctonia solani) management in common bean and compatibility with Rhizobium tropici","authors":"Bruno Henrique Garcia Costa, Mário Lúcio Vilela de Resende, Ana Cristina Andrade Monteiro, Matheus Henrique Brito Pereira, Alexandre Ribeiro Maia de Resende, Gustavo Pucci Botega, Deila Magna dos Santos Botelho","doi":"10.1590/1678-4499.20220155","DOIUrl":"https://doi.org/10.1590/1678-4499.20220155","url":null,"abstract":"Phosphites can be considered an additional strategy to be included in disease management programs. Therefore, this study aims to evaluate the application of potassium phosphite (KPhi) in common bean seeds, in the reduction of intensity of root rot (Rhizoctonia solani) and in the compatibility with Rhizobium tropici, a nitrogen-fixing bacterium. The emergence speed index (ESI) and the percentage of total emergence were evaluated in seeds inoculated with R. solani and treated with KPhi. The number of nodules per root system, dry nodule mass, quantified the compatibility Phi x R. tropici, dry mass, nitrogen content, and nitrogen accumulation in the shoots. KPhi promoted a higher ESI and increase in plant stand compared to the control treatment. The number of nodules formed and the nitrogen content and accumulation in the KPhi treatments were similar to control (seeds inoculated with R. tropici). Thus, the treatment of seeds with KPhi provides control of R. solani and is compatible with R. tropici.","PeriodicalId":48845,"journal":{"name":"Bragantia","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107567","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

Quantification of resistance to Meloidogyne incognita in okra cultivars using linear and nonlinear analyses of growth parameters and nematode infestations 利用生长参数和线虫侵染的线性和非线性分析定量分析秋葵品种对黑线蛾的抗性

4区农林科学

Bragantia Pub Date : 2023-01-01 DOI: 10.1590/1678-4499.20230114

Ijaz Yaseen, Tariq Mukhtar, Hoy-Taek Kim, Bilal Arshad

{"title":"Quantification of resistance to Meloidogyne incognita in okra cultivars using linear and nonlinear analyses of growth parameters and nematode infestations","authors":"Ijaz Yaseen, Tariq Mukhtar, Hoy-Taek Kim, Bilal Arshad","doi":"10.1590/1678-4499.20230114","DOIUrl":"https://doi.org/10.1590/1678-4499.20230114","url":null,"abstract":"The intercropping of corn with forage grasses increases soil cover and may improve soil structural quality. The objective of the study was to evaluate the soil structural properties and the development of second-crop corn intercropping with forage grasses under no-tillage system. The experiment was carried out in an area of Sítio Santo Antônio, located in the municipality of Borrazópolis, Paraná state, Brazil, on a Red Latosol with a very clayey texture. The experiment consisted of five treatments: corn + Urochloa brizantha cv. Marandu (T1), corn + Urochloa brizantha cv. Piatã (T2), corn + Urochloa brizantha cv. Xaraés (T3), corn + Urochloa ruziziensis (T4), and non-intercropping corn (T5). In the corn crop, the following characteristics were evaluated: plant height, first ear in insertion height, stem diameter, corn yield, dry mass of corn straw mulch, dry mass of grasses shoots and dry mass of grasses root. Dry mass of the aerial part and roots of the grasses were evaluated. In the 0–0.10 and 0.10–0.20-m soil depth, soil physical properties were also determined: tensile strength and friability, stability of aggregates, bulk density and total porosity, and degree of compactness. The treatments of corn in intercropping with grasses showed positive results regarding the stability of aggregates, reduction of bulk density and increase of total porosity in the 0–0.10-m soil depth. The intercropping of corn + U. ruziziensis showed the lowest values of degree of compactness and higher production of dry mass of the aerial part.","PeriodicalId":48845,"journal":{"name":"Bragantia","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135107174","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

Effects of temperature and wetness period on the monocyclic components of persimmon anthracnose 温度和湿润期对柿子炭疽病单环成分的影响

4区农林科学

Bragantia Pub Date : 2023-01-01 DOI: 10.1590/1678-4499.20230082

Rafaele Regina Moreira, Ligia Sayko Kowata-Dresch, Francinéia Silva Verbiski, Débora Petermann, Louise Larissa May De Mio

{"title":"Effects of temperature and wetness period on the monocyclic components of persimmon anthracnose","authors":"Rafaele Regina Moreira, Ligia Sayko Kowata-Dresch, Francinéia Silva Verbiski, Débora Petermann, Louise Larissa May De Mio","doi":"10.1590/1678-4499.20230082","DOIUrl":"https://doi.org/10.1590/1678-4499.20230082","url":null,"abstract":"Anthracnose caused by Colletotrichum horii is one of the most important diseases in the persimmon tree. This study aimed to determine the influence of environmental variables on conidia germination, mycelial growth, and infection in persimmon fruit and shoots/twigs. The germination was quantified at 10, 15, 20, 25, and 30°C, with 6, 12, and 24 hours of wetness period. The effects of the same temperatures were also evaluated for mycelial growth, sporulation, and infection on ‘Fuyu’ fruit. The infection on shoots/twigs were quantified at 5, 10, 15, 22, 25, 27, and 35°C. The conidia germinated at all temperatures and wetness combinations, except at 10°C, with 6 hours of wetness. At 24 hours of wetness, the optimal temperature for conidia germination was 21.3°C. The optimal temperature for mycelial growth ranged between 21.7 to 24.3°C. The optimal temperature for lesion growth on fruit was 25.7°C; at 25°C, the incubation period was of two days, and the latent period lasted 12 days. On shoots/twigs, the temperature of 35°C anticipated in two days the onset of symptoms and 5-10°C delayed in eight-10 days the onset of symptoms in relation to temperature of 25°C. In nonlignified shoots, C. horii can cause symptoms from 15 to 35°C. In lignified twigs, C. horii was able to cause symptoms from 5 to 35°C. Because of the incidence and disease progression in most of climatic situations, our results reinforce the importance of monitoring and constantly removing diseased shoots, twigs, and fruits from the orchard to reduce the spread of the pathogen.","PeriodicalId":48845,"journal":{"name":"Bragantia","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135262462","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

Changes in Extreme Air Temperatures in One of South America’s Longest Meteorological Records: Campinas, Brazil (1890-2022) 南美洲最长气象记录之一的极端气温变化:巴西坎皮纳斯(1890-2022)

4区农林科学

Bragantia Pub Date : 2023-01-01 DOI: 10.1590/1678-4499.20230128

Lívia Braz Pereira, Letícia Lopes Martins, Iam Caio Abreu Rodrigues, Graciela da Rocha Sobierajski, Gabriel Constantino Blain

{"title":"Changes in Extreme Air Temperatures in One of South America’s Longest Meteorological Records: Campinas, Brazil (1890-2022)","authors":"Lívia Braz Pereira, Letícia Lopes Martins, Iam Caio Abreu Rodrigues, Graciela da Rocha Sobierajski, Gabriel Constantino Blain","doi":"10.1590/1678-4499.20230128","DOIUrl":"https://doi.org/10.1590/1678-4499.20230128","url":null,"abstract":"The frequency of extreme weather events has increased in almost all regions of the world. In this context, it is vital to understand how the location, scale, and shape of their frequency distributions are changing over time. This study used the flexibility of neural networks to model changes in the probability of daily extremes of maximum (Tmax) and minimum (Tmin) air temperature data in Campinas, Brazil — one of South America’s longest meteorological records spanning from 1890 to 2022. Based on the Extremal Types Theorem, we employed a conditional density network to model the parameters of the generalized extreme value distribution (GEV-CDN) as functions of time. Our findings indicate that a GEV-based model, where the location and scale parameters vary over time, best described the variations in the Tmin series. However, a GEV-based model with only the location parameter varying over time best described the variations in the Tmax series. From an agrometeorological perspective, these results suggest that the probability of Tmax values leading to crop failures is rapidly increasing. The findings indicate a decrease in the probability of agronomic frost events in Campinas over the past 133 years, but the rate of this decrease has slowed in recent years. This result, combined with the negative value of the GEV’s shape parameter, suggests that it is unlikely that Campinas may become an agronomic-frost-free region. To facilitate visualization of the changes in the probability of Tmax and Tmin values from 1890 to 2022, we have developed an internet application available at https://climatology-iac.shinyapps.io/Shinny/.","PeriodicalId":48845,"journal":{"name":"Bragantia","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135609167","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