REVISTA AGRO@MBIENTE ON-LINE最新文献_第3页

Decomposition of yellow ipê [Handroanthus chrysotrichus (Mart. ex DC.) Mattos] seeds in the litter (serrapilheira) 黄色的分解ipê[毛色手花]直流交货)。凋落物中的种子(serrapilheira)

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-11-23 DOI: 10.18227/1982-8470ragro.v16i0.7253

Anna Hester Marotti Magalhaes, Kévila Kelma Nascimento Silva dos Passos, Katiúcia Dias Fernandes, Hisaias de Souza Almeida

{"title":"Decomposition of yellow ipê [Handroanthus chrysotrichus (Mart. ex DC.) Mattos] seeds in the litter (serrapilheira)","authors":"Anna Hester Marotti Magalhaes, Kévila Kelma Nascimento Silva dos Passos, Katiúcia Dias Fernandes, Hisaias de Souza Almeida","doi":"10.18227/1982-8470ragro.v16i0.7253","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7253","url":null,"abstract":"Studies aiming to understand native species seeds permanence in the seed bank of a forest may enhance the knowledge about forest ecology and the ecological restoration of degraded and/or disturbed environments. Therefore, the work aimed to evaluate Handroanthus chrysotrichus reproductive strategy in a forest environment. The seeds collected from the parent plants were sorted, classified, and categorized as: a) Viable; b) Predated; c) Aborted; d) Dark; e) Undefined. In the field, the seeds had the following treatments: a) seeds under litter; b) seed under the ground. Monthly experiment consisted of the following treatments: a) C - Control; b) SLP - seeds stored in the litter and that are predated; c) SLD - seeds stored in the litter and show signs of decomposition; d) SLI - seeds stored in the litter and thar are intact; e) SSP - seeds stored in the soil and that are predated; f) SSD - seeds stored in the soil and that show signs of decomposition; and g) SSI - seeds stored in the soil and that are intact. For the statistical analysis of the results, the non-parametric Kruskal-Wallis and the Chi-Square tests were used. The Handroanthus chrysotrichus (Mart. ex DC) Mattos species is an “R” strategist plant; The high decomposition and predation of its seeds, when dispersed in the soil or litter, prevent its permanence in the seed bank; The investment of the species in seeds with polyembryony is a survival strategy.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129327348","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

Qualitative and safety aspects in the camu-camu production chain camu-camu生产链的质量和安全方面

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-11-13 DOI: 10.18227/1982-8470ragro.v16i0.7312

Carlos Eduardo Faria Cardoso, Maria Eduarda Flores Trindade, C. Coelho, A. Teodoro, O. Freitas-Silva

{"title":"Qualitative and safety aspects in the camu-camu production chain","authors":"Carlos Eduardo Faria Cardoso, Maria Eduarda Flores Trindade, C. Coelho, A. Teodoro, O. Freitas-Silva","doi":"10.18227/1982-8470ragro.v16i0.7312","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7312","url":null,"abstract":"Camu-camu (Myrciaria dubia (Kunth) Mc Vaugh) is a native fruit of Amazon region, which stands out for its high levels of ascorbic acid and phenolic compounds. Such characteristics have increased its demand in the market, with several scientific studies being developed to elucidate its potential. As it is a climacteric fruit, its postharvest life is short. It is due to physiological events such as the growth of microorganisms and physical injuries and, consequently, less quality and poor safety of the product that reaches consumers. Its production system is admittedly fragile as it requires proper handling techniques to preserve both the sensory and nutritional quality of fruits. Thus, this review aimed to present the state-of-the-art of its fruit’s nutritional potential, quality, and post-harvest safety as raw material for the industry and consumers. The decision process outlined in the evidence inclusion protocol of this review was based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. The studies selected for this review followed the flow of identification, selection, and eligibility until their inclusion, allowing the evaluation of the content addressed.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125772239","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

Environments and substrates for “pimenta-de-cheiro” (Capsicum chinense Jacq.) seedling production in the Amazon savana 亚马逊热带草原辣椒苗木生产的环境和基质

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-11-06 DOI: 10.18227/1982-8470ragro.v16i0.7309

João Luiz Lopes Monteiro Neto, José De Anchieta Alves de Albuquerque, Anderson Tiago de Oliveira, Roberto Tadashi Sakazaki, Edgley Soares da Silva, Ignácio Lund Gabriel da Silva Carmo, Sonicley da Silva Maia, Luiz Guilherme Carvalho Sborowski, Breno Jorge Zeferino Monteiro, Jorge Zamir Erazo Amaya

{"title":"Environments and substrates for “pimenta-de-cheiro” (Capsicum chinense Jacq.) seedling production in the Amazon savana","authors":"João Luiz Lopes Monteiro Neto, José De Anchieta Alves de Albuquerque, Anderson Tiago de Oliveira, Roberto Tadashi Sakazaki, Edgley Soares da Silva, Ignácio Lund Gabriel da Silva Carmo, Sonicley da Silva Maia, Luiz Guilherme Carvalho Sborowski, Breno Jorge Zeferino Monteiro, Jorge Zamir Erazo Amaya","doi":"10.18227/1982-8470ragro.v16i0.7309","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7309","url":null,"abstract":"Quality seedlings production is one of the most important steps in the cultivation of vegetable species. In this sense, the objective was to evaluate the influence of different environments and substrates on the production of “pimenta-de-cheiro” (Capsicum chinense Jacq.) seedlings in Boa Vista, Roraima. An experiment was installed in a completely randomized design (CRD), with treatmentsarranged in subdivided plots. Five environments were evaluated: AG - agricultural greenhouse; TV35 - red shading net with 35% shading (red ChromatiNet®); TV50 - red shading net with 50% shading (red ChromatiNet®); TP35 - silver shading net with 35% shading (ChromatiNet® silver) and TP50 - silver shading net with 50% shading (ChromatiNet® silver) and four substrates: O -OrganoAmazon®; OP - OrganoAmazon® and PuroHumus®; OPSE (OrganoAmazon®, PuroHumus®, soil and manure) and OPSEC (OrganoAmazon®, PuroHumus®, soil, manure and carbonized rice husk). On the TP35 and TP50 shading nets, the C. Chinense grown on the OP substrate showed high Dickson’s quality index (DQI). The combination agricultural greenhouse (EA) and OPSE substrate promoted superior quality Capsicum chinense seedlings. The substrates OPSEC and OPSE are more affordable alternatives for the production of Capsicum chinense seedlings. Shading nets, associated with the alternative substrates, do not favor the production of quality Capsicum chinense seedlings under Amazon savanna conditions.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125505793","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

Seasonality of fruit production of Euterpe oleracea and E. precatoria açaí palm trees cultivated in the metropolitan region of Manaus (AM) 马瑙斯大都市区种植的欧洲甘蓝和E. precatoria açaí棕榈树果实生产的季节性(AM)

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-08-22 DOI: 10.18227/1982-8470ragro.v16i0.7282

Ricardo Lopes, Raimundo Nonato Vieira Da Cunha, Marleson dos Santos Tavares, M. D. Raizer, Cibelle Azamora Dos Santos, Eduardo José Dias Da Silva, M. Lopes

{"title":"Seasonality of fruit production of Euterpe oleracea and E. precatoria açaí palm trees cultivated in the metropolitan region of Manaus (AM)","authors":"Ricardo Lopes, Raimundo Nonato Vieira Da Cunha, Marleson dos Santos Tavares, M. D. Raizer, Cibelle Azamora Dos Santos, Eduardo José Dias Da Silva, M. Lopes","doi":"10.18227/1982-8470ragro.v16i0.7282","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7282","url":null,"abstract":"The off-season period for açaí palm production cause social and economic problems that affect producers and consumers. Two species are used for açaí pulp production, Euterpe oleracea and E. precatoria. These species have some distinct characteristics, including the harvest period. The cultivation of açaí palm is expanding in the metropolitan region of Manaus, state of Amazonas, AM, and there are no studies on the harvest period of these species under cultivated conditions in this region. The objective of this study was to evaluate the reproductive phenophases of the açaí palm E. oleracea and E. precatoria grown in the metropolitan region of Manaus, state of Amazonas and to check the harvest period of these species in this region. The reproductive phenophases were evaluated during 24 consecutive months in 20 plants of each species. E. oleracea emitted a greater number of inflorescences from January to July (76%), during the rainy season, and presented a greater number of mature bunches (56%) from October to December, at the end of the dry season. E. precatoria emitted the highest number of inflorescences (70%) from July to November, during the dry season, and the highest proportion of mature bunches (49%) was observed between May and July, at the end of the rainy season. The species presented different harvest periods, so the cultivation of both can contribute to reducing the off-season period of açaí fruit production in the metropolitan region of Manaus, AM.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116017447","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

Threats and challenges in the control of quarantine pathogens in the state of Roraima Brazil 巴西罗赖马州检疫性病原体控制中的威胁和挑战

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-07-25 DOI: 10.18227/1982-8470ragro.v16i0.7292

Bernardo De Almeida Halfeld-Vieira, Daniel Augusto Schurt, Rosianne Nara Thomé Barbosa, Kátia de Lima Nechet

{"title":"Threats and challenges in the control of quarantine pathogens in the state of Roraima Brazil","authors":"Bernardo De Almeida Halfeld-Vieira, Daniel Augusto Schurt, Rosianne Nara Thomé Barbosa, Kátia de Lima Nechet","doi":"10.18227/1982-8470ragro.v16i0.7292","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7292","url":null,"abstract":"Plant diseases can negatively impact the production and sale of agricultural crops in a given region. Because it is a border state, Roraima is a potential entry route of quarantine pathogens that can threaten Brazilian agriculture. Constant health surveillance is an essential tool to mitigate the risks of the introduction and spread of important pathogens. In order to avoid or reduce the negative impacts caused by diseases resulting from the introduction or occurrence of a pathogen, a well-structured phytosanitary inspection program and technical guidelines for producers are necessary. The combined efforts of research institutions and state agencies aim to reduce production losses caused by diseases. Thus, the objective of this review is to address the main threats and challenges in controlling quarantine pests in the state of Roraima based on the experience of research and extension institutions in monitoring, pest detection and mitigation strategies. In this respect, contextualizing the events discussed may contribute to guiding plant defense measures, thus mitigating the risks of quarantine pathogen introduction and spread in Roraima.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"08 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130855359","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

Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil 巴西罗赖马南部从森林campinarana到茂密森林过渡生态系统的植物社会学和木材潜力

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-06-16 DOI: 10.18227/1982-8470ragro.v16i0.7268

T. M. Condé, Salatiel Bastos Borges, Solange Augusta Costa, Adoniel Silva da Conceição, D. L. C. D. Miranda, G. D. S. Lisboa

{"title":"Phytosociology and the timber potential of transitional ecosystems from forested campinarana to dense forest in the south of Roraima, Brazil","authors":"T. M. Condé, Salatiel Bastos Borges, Solange Augusta Costa, Adoniel Silva da Conceição, D. L. C. D. Miranda, G. D. S. Lisboa","doi":"10.18227/1982-8470ragro.v16i0.7268","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7268","url":null,"abstract":"Transitional forest ecosystems in the south of the state of Roraima show great heterogeneity of tree species and represent different volumes of timber stock in projects of vegetation suppression requiring Deforestation Licences (DL). The aim of this study was to evaluate the phytosociology and standing timber volume in ecosystems of Submontane Dense Ombrophilous Forest (Ds) and transitional Campinarana/Ombrophilous Forest (LOt1 and LOt2) in the district of Rorainópolis, Roraima. The DL were issued and authorised from 2011 to 2016 by the State Foundation for the Environment and Water Resources of Roraima (FEMARH) and the Brazilian Institute of the Environment and Renewable Natural Resources (IBAMA). A total of 9,391 timber-yielding trees were analysed, with a DBH ≥ 45 cm in 646.5 hectares; these belonged to 21 botanical families, 73 species and 8 taxa identified at the genus level. Diversity and evenness were greater in Ds (H’ = 3.34; J = 0.82) compared to LOt (H’ = 1.92 to 2.20; J = 0.55). The floristic similarity was greater between Ds and LOt2, of different forest typologies, showing that transitional environments can be complex in terms of floristic composition and diversity. However, the larger volumes of timber stock in LOt1 and LOt2 compared to Ds may be related not only to natural processes, but also to the influence of deforestation and illegal selective logging in the surrounding area. There is a strong need for studies on transitional forest ecosystems in the Amazon, due to the complexity of the ecological relationships, the influence of environmental gradients, and anthropogenic factors.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"475 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114151874","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

Essential oil form clove (Syzygium aromaticum) to control Sclerotium rolfsii in vitro 丁香精油体外抑菌作用的研究

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-04-23 DOI: 10.18227/1982-8470ragro.v16i0.7200

T. S. Lima, Kevison Romulo Da Silva França, J. L. Da Silva, A. B. Santos, Jaqueline Figueredo De Oliveira Costa, Tiago Augusto Lima Cardoso

{"title":"Essential oil form clove (Syzygium aromaticum) to control Sclerotium rolfsii in vitro","authors":"T. S. Lima, Kevison Romulo Da Silva França, J. L. Da Silva, A. B. Santos, Jaqueline Figueredo De Oliveira Costa, Tiago Augusto Lima Cardoso","doi":"10.18227/1982-8470ragro.v16i0.7200","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7200","url":null,"abstract":"Essential oils can inhibit growth of several phytopathogenic fungi of agricultural concern, such as Sclerotium spp. which causes root and collar rots, hampering the absorption of water and nutrients. Natural oils have short persistence in the environment and low toxicity, comprising compounds safer than conventional agrochemicals. Within the context of integrated management of diseases, essential oils may benefit the health of farmers, consumers and the environment. This study evaluated the in vitro inhibitory effect of clove (Syzygium aromaticum) essential oil on the mycelial growth of Sclerotium rolfsii. The experimental design was completely randomized, with 7 treatments (5 oil concentrations, 1 negative control, and 1 positive control) and five replications, with the experimental unit constituted by a Petri dish. The treatments consisted of different oil concentrations (0.0125; 0.025; 0.05; 0.1 and 0.2%) of clove essential oil, a negative control (0.0%) and a positive control, fungicide Tiram (1 mL L-1). The essential oil and the fungicide Tiram were merged into the synthetic Potato-Dextrose-Agar (PDA) culture medium. The plates were inoculated with the pathogen S. rolfsii and incubated for seven days at 25 ± 2 °C. We compared the treatments through the percentage of mycelial growth inhibition (PIC) and the mycelial growth velocity index (IVCM). Increasing oil concentration significantly reduced the mycelial growth of S. rolfsii and paralyzed mycelial growth at 0.1% concentration. The effect of clove essential oil was similar to the commercial fungicide.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"20 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131462837","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

Physiological quality in maize seeds using conventional methods and NIR spectroscopy 利用常规方法和近红外光谱分析玉米种子生理品质

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-04-12 DOI: 10.18227/1982-8470ragro.v17i00.7403

Richard Alcides Molina Alvarez, Sandra Catia Pereira Uchoa, Gabriel Castanheira Guimarães, Daniel Augusto Schurt, Sonicley da Silva Maia, Natalia Vieria de Sousa, Hilda Beatríz Quevedo Andino

{"title":"Physiological quality in maize seeds using conventional methods and NIR spectroscopy","authors":"Richard Alcides Molina Alvarez, Sandra Catia Pereira Uchoa, Gabriel Castanheira Guimarães, Daniel Augusto Schurt, Sonicley da Silva Maia, Natalia Vieria de Sousa, Hilda Beatríz Quevedo Andino","doi":"10.18227/1982-8470ragro.v17i00.7403","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v17i00.7403","url":null,"abstract":"Maize is one of the most important cereals, and stands out for its wide genetic diversity, adaptation to the most diverse climate conditions, and being, both directly and indirectly, the most basic food source of man. Globally, production is dependent on seed quality. Known methodologies for evaluating seed quality require improvement in developing technologies capable of achieving, in less time, results for the targets under evaluation. The aim of this study, therefore, was to compare conventional vigour testing with the ability of NIR technology to classify the physiological quality of maize seeds, cv. DKB-290-HS. For the experiment, which was conducted in a completely randomised design (CRD), six Batches of 200 seeds were used, with four replications. Conventional methods of evaluating seed vigour were used in the study. For the evaluation using the near-infrared (NIR) method, the seeds were placed with the embryo facing the source of electromagnetic waves. The resulting spectra were analysed by the Pirouette software using the PLS-DA method. The conventional methods for vigour, and the NIR technique both efficiently detected the levels of physiological quality. NIR also revealed the differences between Batches, classifying the physiological quality of maize seeds, cv. DKB-290-HS, into different levels quickly and efficiently.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"151 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132470871","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

Estimates of genetic gains in the carrot using different selection indices 利用不同选择指数估算胡萝卜的遗传增益

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-03-12 DOI: 10.18227/1982-8470ragro.v16i0.7154

AG Carvalho, G. E. Pereira, Giovani Olegário da Silva

{"title":"Estimates of genetic gains in the carrot using different selection indices","authors":"AG Carvalho, G. E. Pereira, Giovani Olegário da Silva","doi":"10.18227/1982-8470ragro.v16i0.7154","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7154","url":null,"abstract":"The carrot is one of the most important and preferred vegetables in Brazil due to its versatility and nutritional significance, especially as a source of vitamins. The selection of carrot genotypes should consider several agronomically important characteristics to allow more suitable and balanced gains. The aim of the present study was to estimate genetic gains in the carrot using different selection indices. Thirty-six carrot genotypes were evaluated in two experiments, the first conducted between 16 November 2017 and 1 March 2018, and the second between 5 March and 18 June 2018 in, Brasilia. In both trials. the experimental design was of randomised blocks with three replications. The plots were sown directly onto the seedbed, which had a total working area of 1.8 m2. The incidence of leaf blight was evaluated 78 to 98 days after sowing, at intervals of seven days, giving a total of four evaluations. The harvest was carried out at 105 days when the characteristics of the yield components were measured. An analysis of variance was applied, together with five selection indices: direct selection, classic, desired gain, weight- and parameter-free, and genotype-ideotype. There were differences between genotypes for most of the characteristics under evaluation. The genotype-ideotype index afforded the greatest gains for the characteristics being evaluated, with an economic weight equal to the coefficients of genetic variation; however other indices were also efficient and offered balanced gains, with the exception of the desired-gain index.","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129674502","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

Pedoenvironments driving the monodominance of Peltogyne gracilipes (Leguminosae) in the Northern Amazon, Brazil 巴西亚马逊北部豆科植物Peltogyne gracilipes的土壤环境驱动

REVISTA AGRO@MBIENTE ON-LINE Pub Date : 2022-02-02 DOI: 10.18227/1982-8470ragro.v16i0.7181

Carlos Darwin Angulo Villacorta, L. C. Da Silva Carvalho, M. Nascimento, R. Barbosa

{"title":"Pedoenvironments driving the monodominance of Peltogyne gracilipes (Leguminosae) in the Northern Amazon, Brazil","authors":"Carlos Darwin Angulo Villacorta, L. C. Da Silva Carvalho, M. Nascimento, R. Barbosa","doi":"10.18227/1982-8470ragro.v16i0.7181","DOIUrl":"https://doi.org/10.18227/1982-8470ragro.v16i0.7181","url":null,"abstract":"Monodominance is unusual in the tropics when compared to the high diversity of tropical forests. Peltogyne gracilipes (Leguminosae) is a deciduous tree species that forms monodominant forests in the Brazilian Northern Amazon region. Initial research confirmed that P. gracilipes monodominance was associated with higher soil magnesium content, while recent studies have indicated a larger number of variables, suggesting a more complex hydro-edaphic habitat. As such, the present study aimed to describe the hydro-edaphic habitat (pedoenvironment) where P. gracilipes is monodominant. Edaphic and topographic variables (drainage proxy) were used in a forest inventory conducted in 129 sampling plots. Trees with a stem diameter greater than 10 cm were analyzed. Aboveground biomass was used as a descriptive variable of the different habitats in the study area. A total of 3041 individuals were sampled (298 P. gracilipes). Multivariate analysis demonstrated that the highest P. gracilipes abundance occurred in poorly drained (seasonal flooding) low-altitude habitats (","PeriodicalId":299264,"journal":{"name":"REVISTA AGRO@MBIENTE ON-LINE","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129420494","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