Diógenes Cecchin Silveira

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• PhD in Genetics and Plant Breeding
• Professor (Assistant) at Federal University of Rio Grande do Sul

The genetic improvement of Paspalum notatum aims to develop superior genotypes with high forage yield, persistence, and adaptability. The objective of this study was to evaluate genetic parameters and the repeatability of agronomic traits in genotypes of the specie, and to apply selection methods based on multiple traits to identify genotypes with...

A cultura da soja é o mais importante cultivo dentro do agronegócio brasileiro, sendo o Brasil o segundo maior produtor mundial da leguminosa. Devido à grande relevância econômica da cultura para o país, a identificação de cultivares mais adaptadas e estáveis, e que possuam elevadas produtividades nas mais diversas condições climáticas e de solo to...

The objective of this work was to estimate the genetic parameters of pecan (Carya illinoinensis) cultivars through mixed model analyses of data on vegetative growth, fruit production, and fruit quality traits. The study was conducted from 2021 to 2023, using the Barton, Desirable, Elliot, Mohawk, Jackson, Shoshoni, Stuart, and Success pecan cultiva...

O milho é uma das culturas mais produzidas mundialmente e a utilização de bactérias promotoras de crescimento de plantas auxilia a promover e fortalecer a resistência ao estresse, bem como, aumento na produção de grãos. Deste modo, o presente trabalho objetivou-se investigar o desempenho produtivo do milho com diferentes doses de Azospirillum brasi...

Improvements in nitrogen use efficiency can be achieved through fertilizer management strategies that capitalize on nutrient synergies. However, limited research on synergies between nitrogen, sulfur, and calcium complicates understanding causal links and developing sustainable management. In this regard, the effects of different nitrogen sources o...

A strategy for traditional strawberry genetic improvement is the identification of elite varieties with improved characteristics. Here, we investigated the predicted breeding values, stability and yield of nine cultivars in a greenhouse over two cycles in Brazil. Based on production data, we estimated the variance components and breeding values pre...

The objective of this study was to estimate the genetic parameters and predict selection of genetic gains and genetic diversity of 12 Andropogon lateralis ecotypes collected in the State of Rio Grande do Sul, Brazil. To estimate genetic parameters and predict selection gains, the REML/BLUP technique was applied. Genetic diversity among the ecotypes...

Paspalum guenoarum is a warm‐season perennial grass, with a caespitose growth habit. The species is native to southern Brazilian grasslands and has been used in interspecific hybridizations because of its high palatability, resistance to trampling and grazing, and cold tolerance. Previous studies reported improvements in forage production and the n...

Knowing the phenology, production, and fruit quality of blackberry cultivars grown in greenhouses enables growers to develop and/or improve assertive orchard management. The aim of this study was to investigate whether phenology, production, and fruit quality differ among blackberry cultivars grown under greenhouse. The treatments were four blackbe...

Paspalum guenoarum is a warm-season perennial grass, with a caespitose growth habit. The species is native to southern Brazilian grasslands and has been used in interspecific hybridizations because of its high palatability, resistance to trampling and grazing, and cold tolerance. Previous studies reported improvements in forage production and the n...

The objective of this study was to verify the repeatability of the expression of forage characters in intraspecific hybrids of Paspalum notatum Flügge to aid early selection. Across five harvests, plant height, tiller population density, leaf dry matter, stem dry matter, inflorescence dry matter, total dry matter, and growth habit were quantified f...

The objective of this work was to evaluate the effect of the presence of 2NVS translocation on the inheritance of wheat resistance to head blast, in F2 segregating lines from two biparental crosses. The IPF 86766 and 'Santa Fe' genotypes were used as female parents (both 2NVS carriers), and 'BRS 404', as the common male parent (non 2NVS carrier). U...

Introduction: On a global scale, the obstacles to fruticulture correspond to the lack of skilled labor, the limited amount of available arable land, and the high costs of acquiring fertilizers and pesticides. These inconveniences, linked to environmental impacts and ecotoxicological damage, indicate that scientists, industries, and fruit growers ha...

The use of poultry litter as a source of nitrogen (N) and the decomposition of ground cover plants can be an alternative and N management strategy in the wheat crop, in succession. Therefore, the objective of this study was to evaluate the effect of isolated and/or intercropped cultivation of ground cover plants in autumn/winter and the use of poul...

Root system plays a crucial role in plants’ anchoring, water and nutrients acquisition and storage of carbohydrates. While it is understood that root system traits contribute to crop yield, little is known about the particular effects of root morphology over crop yield, even on major crops such as soybean (Glycine max). The objective of this study...

Maintaining plants for two consecutive cycles in strawberry cultivation makes it possible to reduce costs with the acquisition of daughter plants and allows fruit production throughout the year. Thus, the objective of this study was to investigate whether strawberry cultivars grown for two consecutive cycles in a greenhouse change their horticultur...

The use of soil cover plants and alternative sources of nitrogen fertilization can promote improvements in the biological characteristics of the soil. The objective of this study was to determine the contribution of the isolated and/or intercropped cultivation of ground cover crops in autumn/winter and the use of poultry litter as a source of N in...

The objective of this study was to evaluate and compare two chemical preservatives in terms of their sample preservation capabilities, considering the individual bacterial count (IBC) and time and temperature variables. Samples were collected in expansion tanks in three commercial dairy farms located in the northwest of Rio Grande do Sul, character...

Productivity and phenotypic characters of seven local varieties of corn and one hybrid variety in organic no-tillage with two straw managements were evaluated. The experiment was conducted in a randomized block design in the municipality of Carazinho (RS), in 2019-2020, with a bifactorial scheme (2 x 8), with two straw managements (Mowing and Rolle...

The Paspalum genus has potential for further genetic improvement because of its adaptability to different ecosystems and production of high yields for grazing livestock. We estimate the genetic parameters of 195 intraspecific P. notatum hybrids using Restricted Maximum Likelihood (REML), followed by selection based on Best Linear Unbiased Predictio...

As interações que ocorrem no sistema Integração Lavoura-Pecuária (ILP) são complexas, uma vez que, além da planta e do solo, existe a participação do animal. Em alguns lugares, otimizar esses três componentes juntos é um desafio, principalmente o uso do solo, da terra e dos recursos naturais presentes. Na região sul do Brasil, durante o período de...

A utilização do trigo de duplo propósito surge como uma estratégia agrícola para maximização do uso do solo, principalmente para produção de forragem e grãos visando potencializar recursos naturais nas estações outono e inverno no Rio Grande do Sul. O objetivo deste trabalho foi avaliar o efeito de doses de nitrogênio na produção de pré-secado e gr...

A utilização do trigo de duplo propósito surge como uma estratégia agrícola para maximização do uso do solo, principalmente para produção de forragem e grãos visando potencializar recursos naturais nas estações outono e inverno no Rio Grande do Sul. O objetivo deste trabalho foi avaliar o efeito de doses de nitrogênio na produção de pré-secado e gr...

The objective of this work was to describe morphology and grouping of Paspalum notatum accessions, based on multicategorical data which discards the redundant variables for quantification of genetic diversity. We also tested the hypothesis that geographical distance was correlated with morphological divergence. In our study, multivariate analyzes s...

The global population reached 7.9 billion in 2021, which represents a 160% increase in the number of people to be fed since 1960. Agricultural systems must sustainably meet food demand for this growing population while minimizing or mitigating potential environmental impacts, which are of growing concern to both consumers and the scientific communi...

The present study described the chemical composition and somatic cell score (SCS) of samples of refrigerated raw milk collected from commercial farms in the state of Rio Grande do Sul in order to better understand the behavior of constituents present in non-fatty solids (NFS) in milk according to the season of the year. Means were used to describe...

Genetic improvement of native forage species is a sustainable alternative for maximizing livestock production. Paspalum notatum Flügge is the most important forage grass in the native grasslands of southern Brazil, with substantial potential available for further genetic improvement. The objective of this study was to quantify a range of genetic pa...

The lack of information on the agronomic potential of blueberry cultivars in response to edaphoclimatic and biogeographical characteristics limits the establishment of commercial orchards in the producing regions of southern Brazil. Thus, the research objective was to investigate whether the agronomic potential differs among blueberry cultivars in...

RESUMO: A atividade leiteira é considerada um dos principais segmentos do agronegócio brasileiro, sob o ponto de vista econômico e social. O estudo tem por objetivo contribuir na compreensão dos parâmetros ambientais envolvidos na formação do perfil sustentável de propriedades leiteiras. Os menores índices ambientais foram devido ao manejo inadequa...

The objective of this research was to identify the existence of root exudation of organic acid in Lotus corniculatus germplasms subjected to toxic aluminum (Al) levels and investigate the effect of this mechanism on the Al content in the root tissue and in morphological parameters of plant development. Two experiments were performed in nutrient sol...

Andropogon lateralis Nees is a native grass of southern Brazil and is one of the most frequent specie found in native grasslands. The species is widely distributed and has a high degree of phenotypic plasticity, which makes it highly adaptable to different edaphoclimatic conditions and management. This study aimed to evaluate the behavior of twelve...

The objective of this study was to evaluate 94 Paspalum notatum genotypes over two growing seasons to estimate genetic dissimilarity through agronomic traits and the distance between genotypes. This information is used to create an ideotype from the best averages obtained for the set of characteristics evaluated. Seven apomitic, three sexual, and 8...

The present study aims to determine the appropriate defoliation management for the production of seeds and forage in arrowleaf clover via trail analysis. The results obtained demonstrated that defoliation practices have a great influence on the composition of seed yield and germination power. In addition, when the goal is the maximum balance betwee...

The runout of newly cultivated areas in the world without recurring to the deforestation, demand a necessity to improve yield to sustain a growth population which demands each time more food. To avoid that is necessary to solve the main issues which cause crop productivity reduction, such as lodging which causes yield reduction in many major crops...

Forage conservation as silage is technique for animal production due to the seasonality of forage production that takes place during the year, there are times with surplus production and in others, scarcity. In addition, the use of small grains in ruminant diets is characterized as an economic and environmentally viable alternative because it uses...

Lodging dramatically reduces the yield of cereals and increases the difficulty of mechanical harvesting. Because it is a complex phenomenon, new cultivars with genetic resistance to lodging is a sustainable alternative in agricultural production systems. This resistance is associated with a combination of factors, such as stem thickness and stiffne...

Ryegrass (Lolium multiflorum Lam.) is one of the most difficult annual weeds to control in cultivation systems worldwide, especially in temperate regions. The widespread use of herbicides in the past two decades has selected resistant biotypes of ryegrass in crops in Southern Brazil. Ryegrass seeds are dormant when disseminated and germination can...

Com o intuito de ofertar forragem de forma precoce e por um maior período de tempo, recentemente foi lançada no mercado uma cultivar de trigo direcionada exclusivamente para pastejo. Dado o exposto, o presente estudo teve como objetivo avaliar as características agronômicas da cultivar TBIO Lenox (Triticum aestivum L.) exclusiva para pastejo em cul...

A technical magazine focused on the sustainability of pastoral systems in Southern Cone of South America. The objective is to discuss technical and practical issues involved in all kind of pastoral systems. The publication has a simple language to better comprehension of farmers, professionals, consultants, professors and students as well as people...

Ryegrass (Lolium multiflorum Lam.) is the main winter weed of crops in Southern Brazil. High competitiveness, adaptability, widespread resistance to herbicides and seed dormancy make the plant a permanent problem. Herbicides, as well as plant growth regulators, can be used as a management option for ryegrass seed production, however there is no con...

Em um momento de preços estratosféricos para os grãos, carne e para os insumos, os sistemas pastoris seguem firmes, resilientes, plenamente recuperados após uma das maiores secas já enfrentadas pela região Pampeana nas últimas décadas. Associados ou não a um sistema integrado e/ou pastagens cultivadas, os campos naturais são a base da nossa produçã...

The flooding of hydromorphic soils results in significant losses of crop productivity every year, especially in tomato. It is believed that the expression of heats hock proteins, especially sHSPs, play an important role in tolerance to multiple environmental stresses, and may alleviate the damages resulting from the low concentration of oxygen from...

This work aimed at evaluating the influence of nitrogen rates on the persistence of ryegrass forage production during four agricultural years. The experiment was performed in the experimental area of the University of Cruz Alta, Brazil. The experimental design was complete randomized blocks, with four agricultural years (2013, 2014, 2015 and 2016)...

The Asian Soybean Rust caused by the fungus Phakopsora pachyrhizi is one of the serious phytosanitary problems faced by soybean [Glycine max (L.) Merrill], which cause up to 80% yield loss. An alternative for the integrated management of the disease is the use of mineral nutrition together with phytosanitary treatments. Thus, the objective of this...

SILVEIRA, D. C.; MACHADO, J. M. . USO DE FORRAGEIRAS COMO PLANTAS DE COBERTURA NO PERÍODO HIBERNAL. Agrocampo, Cruz Alta, p. 36 - 36, 04 set. 2020.

Seed deterioration is an important topic in plant science, as the majority of cultivated species use seeds as their means of propagation; however, due to its complexity, the process of seed deterioration has not yet been completely elucidated. Three soybean cultivars (BMX Raio, BMX Zeus, and DM 53i54) exposed to four distinct periods of accelerated...

O objetivo do presente estudo foi avaliar a resposta agronômica e econômica da pastagem de aveia preta (cv. Embrapa 29 Garoa) submetida a diferentes fontes e doses de fertilização nitrogenada. O delineamento experimental utilizado foi o de blocos ao acaso, organizado em esquema fatorial: duas fontes de Nitrogênio x cinco doses de fertilização x trê...

A technical magazine focused on the sustainability of pastoral systems in Southern Cone of South America. The objective is to discuss technical and practical issues involved in all kind of pastoral systems. The publication has a simple language to better comprehension of farmers, professionals, consultants, professors and students as well as people...

DIÓGENES CECCHIN SILVEIRA; JULIANA MEDIANEIRA MACHADO . INTEGRAÇÃO LAVOURA-PECUÁRIA AGREGA RENDA AO PRODUTOR. AGROCAMPO, Cruz Alta, p. 32 - 32, 25 abr. 2019.

Emergence uniformity and the time required for emergence are essential factors for obtaining highly productive potential in plants. Factors such as sowing depth and soil moisture affect uniformity and emergence, but little is known about the impacts of seed vigor. Thus, we determined the impacts of seed vigor on uniformity and growth as well as dev...

Na agricultura há muito tempo são conhecidos os efeitos do acamamento de plantas, impactando diretamente no rendimento e qualidade dos grãos, além de dificultar a colheita. Resultados de pesquisas apontam que as perdas pelo acamamento podem chegar até a 80%. A seleção para a resistência ao acamamento em programas de melhoramento de cereais é difíci...

DIÓGENES CECCHIN SILVEIRA; JULIANA MEDIANEIRA MACHADO . Manejo da pastagem como forma de mitigação dos GEEs. Revista Agrocampo, Cruz Alta, p. 57 - 57, 18 fev. 2020.

O feijão representa 50% do volume de grãos consumidos no mundo e este é a principal fonte de proteína usada na alimentação humana em diversos países da América Latina, da África Oriental e da África do Sul. O presente estudo foi realizado com o objetivo de estimar a diversidade genética de nove acessos de feijão (oito acessos crioulos e uma cultiva...

DIÓGENES CECCHIN SILVEIRA; JULIANA MEDIANEIRA MACHADO . Da colheita ao cocho: Impacto da fibra fisicamente efetiva na alimentação de rebanhos leiteiros. Revista Agrocampo, Cruz Alta, p. 50 - 50, 13 set. 2019.

SILVEIRA, D.C.; MACHADO, J. M. . CULTURAS ALTERNATIVAS PARA PRODUÇÃO DE SILAGEM NO INVERNO. Revista Agrocampo, Cruz Alta, p. 28 - 28, 28 jun. 2019.

SILVEIRA, D.C.; MACHADO, J. M. . ESTRATÉGIAS PARA PRODUÇÃO DE SILAGEM COM QUALIDADE. AGROCAMPO, Cruz Alta, p. 32 - 32, 20 dez. 2018.

O azevém (Lolium multiflorum L.) é uma espécie de grande importância para a pecuária do Rio Grande do Sul, sendo essa uma das principais atividades econômicas do Estado. O trabalho foi realizado com o objetivo de estabelecer as principais variáveis determinantes da produção e qualidade de sementes de azevém. Com base nas discussões expostas, pode-s...

Genetic variability is essential for maize breeding, being source of determining alleles and genes that maximize traits of agronomic interest, minimize abiotic and biotic stresses, as germplasm sources for breeding, one can use landraces, adapted populations, exotic populations and commercial hybrids, which are readily available to lineages extract...

DIÓGENES CECCHIN SILVEIRA; JULIANA MEDIANEIRA MACHADO . Consorciação de gramíneas e leguminosas hibernais: A estratégia para altas produções forrageiras. AGROCAMPO, Cruz Alta, p. 28 - 28, 01 nov. 2018.

A soja é a mais importante oleaginosa cultivada no mundo e uma das principais commodities agrícolas do Brasil, onde representa 49% da área plantada no país. É uma leguminosa originária do sudoeste asiático, mais precisamente da China. No Rio Grande do Sul constam em registros que 1900 tenha sido o ano primeiro do seu cultivo, porém a difusão expone...

The purpose of this study was to determine the influence of the presence of awns in wheat ears on the physiological seed quality, and its effect on some grain characteristics and seedlings produced under field conditions in the northwest of Rio Grande Sul State. The experiment was conducted at the Experimental Field of the University of Cruz Alta A...

Rice is one of the most cultivated cereal in global agriculture, with an average yield of around 4.500kg / ha and production exceeding 700 million tons. The objective of this study consisted of a survey of agromorphological data used as descriptors of varieties suitable for cultivation in Rio Grande do Sul, crop season 2015/2016, in order to determ...

Este trabalho teve por objetivo avaliar a biomassa forrageira em respostas a diferentes doses de adubação nitrogenada em cobertura durante três anos agrícolas na região Noroeste do Rio Grande do Sul. O estudo foi conduzido em área experimental do Curso de Agronomia da Universidade de Cruz Alta, nos anos agrícolas de 2007, 2008 e 2009. A massa seca...

Este trabalho teve por objetivo avaliar a produtividade e características de oito variedades de milho crioulo, originárias do processo de resgate e multiplicação desse tipo de genótipos, realizado pelos produtores que praticam a agricultura familiar no Rio Grande do Sul. O experimento foi conduzido na Área Experimental do Curso de Agronomia da Univ...

O objetivo deste trabalho foi avaliar o desempenho agronômico e a variabilidade morfológica de 16 variedades que integram o processo de resgate e multiplicação de sementes de milho crioulo, realizado por produtores que praticam a agricultura familiar no Rio Grande do Sul. Para a avaliação das características agromorfológicasas variedades foram cult...

Este trabalho teve por objetivo avaliar a qualidade da forragem de azevém nativo em resposta a níveis crescentes de adubação nitrogenada, tendo por parâmetro o teor de proteína determinado pelo conteúdo de nitrogênio foliar. Os resultados alcançados no presente estudo permitiram concluir que a adubação nitrogenada em forma de ureia proporcionou aum...