scholarly journals Productivity and quality of cotton fiber in different planting seasons

2020 ◽  
Vol 36 (6) ◽  
Author(s):  
Cynthia Pereira Gundim ◽  
Daniel Bonifácio Oliveira Cardoso ◽  
Melissa Cristina Carvalho de Miranda ◽  
Victor Martins da Silveira ◽  
Luiza Amaral Medeiros ◽  
...  
Keyword(s):  
Fiber Quality ◽  
Block Design ◽  
Minas Gerais ◽  
Climatic Conditions ◽  
Sowing Time ◽  
High Productivity ◽  
Minas Gerais State ◽  
Cotton Genotypes ◽  
Sowing Season ◽  
The One

Cotton is one of the main agricultural products produced in Brazil. With such a high demand in the market, it is necessary that the cotton cultivars present high productivity and fiber quality. In order to favor the expression of the potential of the genotypes, the cultivation must occur in climatic conditions that provide good development of the plants, being the sowing time a primordial factor for the good performance of the cotton plant. In order to establish an ideal sowing season for different cotton genotypes, the present study aimed to evaluate the best sowing season of cotton genotypes for the environment of Uberlândia (Minas Gerais State), aiming at productivity and fiber quality. The experiment was carried out in field conditions, in the 2016/2017 harvest in the experimental area located at Fazenda Capim Branco, in the city of Uberlândia, Minas Gerais State. A randomized complete block design (DBC) with four replications in a 4x7 factorial scheme was used: 4/12 sowing dates: 05/12, 19/12, 30/12, 13/01 and 7 genotypes. 5 strains of the breeding program of the Federal University of Uberlândia (UFU) and 2 commercial cultivars. The evaluated characteristics were: seed cotton yield, feather yield, micronaire index, maturity index, fiber length, uniformity of length, short fibers, resistance and elongation. It was concluded that the best sowing season for a high productivity was the one performed on 12/05/16, with emphasis on the UFUJP-Z genotype. For fiber quality, UFUJP-C showed the best results at the 12/19/16 sowing season.

scholarly journals Performance of soy cultivars in the south of Minas Gerais State, Brazil

2017 ◽  
Vol 9 (3) ◽  
Author(s):  
Elaine Cristina Batista ◽  
José Luiz De Andrade Rezende Pereira ◽  
Adriano Teodoro Bruzi ◽  
Everton Vinucius Zambiazzi ◽  
Karina Barroso Silva
Keyword(s):  
Grain Yield ◽  
Plant Height ◽  
Environmental Variables ◽  
Block Design ◽  
Minas Gerais ◽  
Climatic Conditions ◽  
The South ◽  
Randomized Block Design ◽  
Minas Gerais State

Cultivar evaluation is one of the basic steps recommended for a given region, since the best adapted cultivars have higher yields, and success in this parameter is based on the genotype of the material and its interaction with the environmental variables. The aim of this study was to evaluate thebehavior of 23 soy cultivars in the soil-climatic conditions of the south region of Minas Gerais State (MG), Brazil, in the municipality of Inconfidentes. The evaluated traits were grain yield, plant height, height of insertion of the first legume and lodging. The experiments were conducted on the 2013/2014 and 2014/2015 harvests, adopting a randomized block design with three replicates and 23 treatments, which were constituted by the following cultivars: FAVORITA RR, BRS MG 760SRR, NA 5909 RG, NA 7200 RR, CD 2630, CD 250, NA 7620 RR, CD 2737, TMG 123, V-MAX RR, P 98Y11 RR, NS 7100 RR, BMX Potencia, Anta 82 RR, CD 237, V-TOP, TMG 1176 RR, TMG 1174 RR, TMG 1179 RR, TMG 1181 RR, BMX Força, Monsoy 7211 RR and BRS MG 780 RR. Of the studied cultivars, those that most stood out for the traits evaluated in the conditions of Inconfidentes (MG) were TMG 1179 RR (48.6 bags of 60 kg ha-1), NA 7200 RR (45.6 bags), CD 2737 (41.1 bags), CD 237 (41 bags) and BRS MG 760 SRR (40.6 bags), all of which displayed satisfactory conditions for mechanical harvesting, demonstrating the good performance of the crop in the south region of Minas Gerais State.

scholarly journals YIELD OF CHICKPEAS SOWN AT DIFFERENT TIMES

2018 ◽  
Vol 31 (4) ◽  
pp. 900-906 ◽  
Author(s):  
RAMON IVO SOARES AVELAR ◽  
CÂNDIDO ALVES DA COSTA ◽  
FERNANDO DA SILVA ROCHA ◽  
NELSON LICÍNIO CAMPOS DE OLIVEIRA ◽  
WARLEY MARCOS NASCIMENTO
Keyword(s):  
Block Design ◽  
Minas Gerais ◽  
Climatic Conditions ◽  
Joint Analysis ◽  
The North ◽  
Randomized Block Design ◽  
Sowing Dates ◽  
Productive Potential ◽  
Maximum Temperatures ◽  
Sowing Season

ABSTRACT In Brazil, studies on chickpeas (Cicer arietinum L.) have demonstrated the high productive potential of this crop, especially in the Cerrado areas of Cristalina, GO, and Brasília, DF. Due to dry winter climatic conditions, the North of Minas Gerais may be very suitable for the production of this crop. However, more information on chickpea sowing dates is needed. Therefore, the objective of the present study was to evaluate different chickpea sowing times in two municipalities of Minas Gerais State in Brazil: Montes Claros and Januária. The experiment was carried out in a randomized block design, comprising three sowing dates (12 May, 23 June, and 22 July, 2015), and seven replications. The cultivar used was BRS Aleppo, and the chickpeas were harvested 121 days after sowing. The variables evaluated included plant height, productivity, number of pods with one grain, and number of pods with two grains. The data were submitted to analysis of variance, and joint analysis of the experiments was performed. The highest yields were obtained when chickpeas were sown in May in Montes Claros, with a yield of 5.3 t ha-1. In Januária, chickpeas sown in May and June produced yields greater than 3.0 t ha-1. The plants sown in July, considered late for planting, were harvested during the rainy season, which compromised the quality and yield of the grains. In addition, maximum temperatures above 30ºC were recorded from September onwards in both locations, which also resulted in a reduction in the number of grains per plant. Thus, this sowing season is not recommended in the studied region.

scholarly journals Phenotypic adaptability of cotton genotypes to the brazilian cerrado for yield and fiber quality

2020 ◽  
Vol 36 (4) ◽  
Author(s):  
Mayara Fávero Cotrim ◽  
Francisco José Correa Farias ◽  
Luiz Paulo de Carvalho ◽  
Larissa Pereira Ribeiro Teodoro ◽  
Carlos Antonio da Silva Junior ◽  
...  
Keyword(s):  
Fiber Length ◽  
Fiber Strength ◽  
Fiber Quality ◽  
Block Design ◽  
Brazilian Cerrado ◽  
Gxe Interaction ◽  
Randomized Block Design ◽  
Cotton Genotypes ◽  
High Predictability ◽  
Fiber Traits

Studies on the adaptability and stability are fundamental for plant breeding as they are an alternative to reduce the effects of genotypes x environments interaction (GxE). Moreover, they help identify cultivars with predictable behavior, which are responsive to environmental improvements, subsidizing cultivar recommendation. This study aimed to investigate the genotypes x environments interaction in cotton genotypes grown in the Brazilian Cerrado and identify genotypes for favorable and unfavorable environments. During the 2013/2014 and 2014/2015 seasons, 19 competition trials were carried out with cotton in a randomized block design, with 12 treatments, and four replications. The traits cotton seed yield, fiber percentage, fiber length, and fiber strength were evaluated. Results revealed significant GxE interaction for all the fiber traits evaluated. Genotype BRS 369 RF revealed general adaptability and high predictability for the fiber traits evaluated.

scholarly journals Seasonal Variation and Frequency Distribution of Ectoparasites in Crossbreed Cattle in Southeastern Brazil

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Maria do Socorro Ferraz da Costa ◽  
Marcos Pezzi Guimarães ◽  
Walter dos Santos Lima ◽  
Ana Julia Ferraz da Costa ◽  
Elias Jorge Facury Filho ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Frequency Distribution ◽  
Minas Gerais ◽  
Climatic Conditions ◽  
Climatic Factor ◽  
Boophilus Microplus ◽  
Field Conditions ◽  
Southeastern Brazil ◽  
Minas Gerais State ◽  
The Mean

The aims of this study were to evaluate the seasonal variation and frequency distribution of Rhipicephalus (Boophilus) microplus, Haematobia irritans, and Dermatobia hominis on crossbred heifers under field conditions in the northeast of Minas Gerais state, southeastern Brazil. From November 2007 to September 2009 (23 months), 40 heifers aged 16.6±2.4 months were divided into groups A (1/4 Holstein × 3/4 Gir) and B (1/2 Holstein × 1/2 Gir) and had the monthly infestation estimated along with the climatic conditions. The mean maximum and minimum temperatures were 28.5 and 19°C, respectively. The ectoparasites were present on animals in all months of the year. The levels of ticks on the animals were low (3.0±0.2 ticks/animal), with the highest density in midwinter. The temperature was the climatic factor that most influenced the tick levels. The population of H. irritans (13.9±0.3 flies/animal) and D. hominis (1.5±0.2 larvae/animal) on heifers was more influenced by rainfall and exhibited two population peaks during the year. 1/2 Holstein heifers harbored significantly more H. irritans and D. hominis than 1/4 Holstein heifers. The results are discussed considering the most appropriate periods to apply ectoparasiticides and the genetic make-up of the animals.

scholarly journals Temporal Progress of Candeia Rust Caused by Puccinia velata in Clonal Candeia Plantation (Eremanthus erythropappus (DC.) McLeisch)

Forests ◽  
2020 ◽  
Vol 11 (7) ◽  
pp. 720
Author(s):  
Renata C. M. Pereira ◽  
Maria A. Ferreira ◽  
Thaissa P. F. Soares ◽  
Mario F. C. M. Andrade ◽  
Cézar A. L. Filho ◽  
...  
Keyword(s):  
Disease Severity ◽  
Gompertz Model ◽  
Minas Gerais ◽  
Climatic Conditions ◽  
Disease Progress ◽  
Progress Curve ◽  
Pearson Coefficient ◽  
Assessment Period ◽  
Minas Gerais State ◽  
Temporal Progress

The temporal progress of candeia rust, caused by the fungus Puccinia velata, was monitored in an experimental field at Lavras municipality, Southern Minas Gerais state, Brazil. A plantation with 17 Eremanthus erythropappus clones was set at the site, and the temporal disease progress was analyzed based on visual assessments of disease severity on leaves. The disease was monitored monthly between September 2016 and August 2017. Progress curves based on disease severity were constructed and empirical models were fitted. The area under the disease progress curve (AUDPC) was calculated, and the means test was applied to select clones resistant to the disease. The Pearson coefficient was used to assess correlations between disease severity and environmental variables. The model that best described disease progress over the assessment period was the Gompertz model. The mean AUDPC values were grouped into four groups of resistance levels according to the Scott–Knott test. There was a negative correlation between air temperature and disease severity. Considering that the disease occurred in all clones and that the climatic conditions of Southern Minas Gerais are favorable to the candeia rust, it is important to adopt measures for the selection of clones resistant to this disease.

scholarly journals COMPARATIVE PERFORMANCE OF VARIOUS SUNFLOWER HYBRIDS FOR YIELD AND ITS RELATED ATTRIBUTES

2013 ◽  
Vol 46 (4) ◽  
pp. 57-64 ◽  
Author(s):  
M.A. Sarwar ◽  
M.N. Khalil-Ur-Rehman ◽  
H.M.R. Javeed ◽  
W. Ahmad ◽  
M.A. Shehzad ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Block Design ◽  
Research Area ◽  
Climatic Conditions ◽  
Comparative Performance ◽  
Area Index ◽  
Head Diameter ◽  
High Productivity ◽  
Plot Size ◽  
Randomized Complete Block Design

ABSTRACT An experiment to evaluate comparative performance of various sunflower hybrids for yield and its related attributes was conducted at the Agronomic Research Area, University of Agriculture, Faisalabad, Pakistan, during autumn 2008. Twelve sunflower hybrids, i.e. G-101 (H1), DK-4040 (H2), SF-187 (H3), S-278 (H4), Hysun-33 (H5), FH-37 (H6), Ausigold-61 (H7), Ausigold-62 (H8), FSS-50 (H9), NX- 00989 (H10), NX-00997 (H11) and XIYU-12 (H12) were included in the trail. The experiment was laid out in randomized complete block design (RCBD), having three replicates with plot size of 5m x 3m. Statistical analysis of the data showed significant differences for all the parameters. It was observed that Hysun-33 showed greater plant height (148.47 cm) and achene per head (682.70) than all other hybrids, however in case of yield (3891.0 kg ha-1) and other related traits such as number of plants m-2, leaf area index, head diameter and 1000-achene weight SF-187 displayed better performance by recording values (6.87), (4.33), (18.62) and (49.11g), respectively, following Hysun-33 for most of the traits. From the results of experiment it can be concluded that the hybrids SF-187 and Hysun-33 showed high productivity and are best adapted to the climatic conditions of Faisalabad.

scholarly journals PROPOSTA DE ENQUADRAMENTO DE CORPOS HÍDRICOS EM CLASSES DE USO NA BACIA HIDROGRÁFICA DO RIO SANTO ANTÔNIO (MG)

Nativa ◽  
2019 ◽  
Vol 7 (2) ◽  
pp. 189
Author(s):  
Guilherme Barbosa Reis ◽  
Vitor De Oliveira Abreu ◽  
Micael De Souza Fraga ◽  
Tiago Tozi ◽  
Demetrius David da Silva
Keyword(s):  
Water Quality ◽  
Environmental Planning ◽  
Minas Gerais ◽  
Water Bodies ◽  
Conformity Index ◽  
Intervention Measures ◽  
Reference Flow ◽  
Minas Gerais State ◽  
Class 1 ◽  
The One

O presente trabalho buscou elaborar uma proposta de enquadramento dos corpos hídricos em classes de uso na bacia do rio Santo Antônio, Estado de Minas Gerais. A classificação varia de acordo com a qualidade da água em cinco classes (especial, 1, 2, 3 e 4). Os critérios utilizados para a elaboração do enquadramento foram: uso e a ocupação do solo, finalidades das outorgas, volumes outorgados, vazão mínima de referência e densidade populacional. Para cada critério foi atribuído um peso e o mapa de enquadramento foi gerado a partir da sobreposição dos mapas dos critérios adotados. Devido a limitações nas bases de dados, optou-se por propor o enquadramento apenas para os principais rios da bacia. Para definição das áreas prioritárias de intervenção, o Índice de Conformidade ao Enquadramento (ICE) foi calculado com base no enquadramento obtido para os trechos de rio. Como resultado, os rios Guanhães e Preto do Itambé foram enquadrados nas classes 1 e 2. O rio do Peixe foi classificado como classe 1 e os rios Santo Antônio e do Tanque foram classificados como classe 2. O trecho enquadrado na classe 1 do rio Guanhães apresentou a menor média do ICE, sendo considerada área prioritária de intervenção.Palavras-chave: geoprocessamento, planejamento ambiental, recursos hídricos. PROPOSAL OF FRAMING THE WATER BODIES IN CLASSES OF USAGE IN THE SANTO ANTÔNIORIVER WATERSHED, MINAS GERAIS STATE, BRAZIL ABSTRACT: The present work aims to elaborate a proposal of framing the water bodies in classes of usage in the Santo Antônio river basin, located in the state of Minas Gerais. Classification varies according to water quality in five classes (special, 1, 2, 3 and 4). The criteria used to elaborate the proposal were the usage and occupation of the soil, purposes of the grants, volumes granted, minimum reference flow and population density. For each criterion a weight was attributed, and the framing map was generated from the overlay of the adopted criteria maps. Due to limitations in the databases, it was decided to put foward the framework for the main rivers of the basin. Framing Conformity Index (FCI) was also calculated in order to define priority areas for intervention purposes. As a result, Guanhães and Preto do Itambé rivers were classified in classes 1 and 2. The Peixe river was classified as class 1 and the Santo Antônio and Tanque rivers were classified as class 2. The section classified in class 1 of the Guanhães river was the one that presented lower FCI, therefore intervention measures are necessary.Keywords: environmental planning, geoprocessing, water resources.

scholarly journals DEMANDA DE NUTRIENTES PELO MILHO SAFRINHA EM FUNÇÃO DA ÉPOCA DE SEMEADURA E ADUBAÇÃO

2017 ◽  
Vol 16 (3) ◽  
pp. 481
Author(s):  
EDUARDO DE PAULA SIMAO ◽  
ÁLVARO VILELA RESENDE ◽  
MIGUEL MARQUES GONTIJO NETO ◽  
EMERSON BORGHI ◽  
DENIZE CARVALHO MARTINS ◽  
...  
Keyword(s):  
Zea Mays ◽  
Grain Yield ◽  
Zea Mays L ◽  
Block Design ◽  
Sowing Date ◽  
Climatic Conditions ◽  
Sowing Time ◽  
Central Brazil ◽  
Randomized Complete Block Design ◽  
Npk Fertilization

RESUMO - No Brasil Central, a produtividade e a demanda nutricional do milho em sucessão à soja cultivada no verão são dependentes das condições climáticas ao longo do ciclo. Sendo assim, objetivou-se com esse trabalho quantificar a extração e exportação de nutrientes pelo milho, em função da época de semeadura e da adubação fornecida na safrinha de 2014, em Rio Verde-GO. Em cada época de semeadura (29/01/2014 e 25/02/2014) foi conduzido um experimento em delineamento de blocos casualizados, com quatro repetições, num esquema fatorial 4x2, sendo quatro adubações de semeadura (00-00-00, 00-50-50, 25-50-50 e 50-50-50 kg ha-1 de N-P2O5-K2O), com ou sem adubação nitrogenada em cobertura (0 ou 50 kg ha-1 de N). Ao final do ciclo, foram avaliados o rendimento de grãos e o acúmulo de nutrientes nos componentes da parte aérea. Foram determinadas a extração e a exportação de nutrientes. O desenvolvimento e a extração de nutrientes pelo milho safrinha são influenciados pela época de cultivo, assim como pela adubação nitrogenada em cobertura, sem, contudo, ser afetados pela adubação NPK realizada na semeadura. Há maior produção de biomassa seca e produtividade de grãos com a semeadura em janeiro em comparação a fevereiro. O cultivo na primeira época e o nitrogênio em cobertura resultam em maior extração da maioria dos nutrientes, sem necessariamente implicar maiores taxas de exportação com a colheita dos grãos. Em média, a exportação por tonelada de grãos produzida foi de 14,2; 1,5; 2,8; 0,07; 0,7 e 1,0 kg de N, P, K, Ca, Mg e S; e de 2; 12; 4 e 16 g de Cu, Fe, Mn e Zn, respectivamente. Esses valores implicam doses relativamente baixas de fertilizantes na adubação de manutenção para repor a exportação na colheita do milho safrinha.Palavras-chave: sucessão de culturas, extração, exportação, requerimentos nutricionais, Zea mays L.  OFF-SEASON CORN NUTRIENT DEMAND ACCORDING TO THE SOWING DATE AND FERTILIZATION  ABSTRACT - In Central Brazil, productivity and nutritional demand of corn in succession to soybeans grown in summer are dependent on climatic conditions throughout the cycle. Therefore, the objective of this work was to quantify the extraction and exportation of nutrients by off-season corn, according to the sowing date and fertilization in Rio Verde, State of –Goiás, Brazil. In each sowing time (01/29/2014 and 02/25/2014), a randomized complete block design experiment was carried out, with four replications, in a 4x2 factorial scheme, with four sowing fertilizations (00- 00-00, 00 -50-50, 25-50-50 and 50-50-50 kg ha-1 of N-P2O5-K2O), with or without nitrogen fertilization (0 or 50 kg ha-1 N). At the end of the cycle, grain yield and nutrient accumulation in shoot components were evaluated. The extraction and export of nutrients were determined. The growing season and the sidedress nitrogen influence the development and extraction of nutrients by the off-season corn, without, however, being affected by the NPK fertilization at sowing. There is higher production of dry biomass and grain yield with sowing in January compared to February. First-season cultivation and sidedress nitrogen result in greater extraction of most nutrients, without necessarily implying higher export rates with grain harvest. On average, the export per ton of grain produced was 14.2, 1.5, 2.8, 0.07, 0.7, and 1.0 kg for N, P, K, Ca, Mg and S; and 2, 12, 4, and 16 g for Cu, Fe, Mn and Zn, respectively. These values result in relatively low amounts of fertilizers in the maintenance fertilization to replace the nutrients exported by the grain harvest.Keywords: succession crops, extraction, export, nutrient requirements, Zea mays L.

scholarly journals De volta a um futuro incerto: relações intergovernamentais e gestão metropolitana na RMBH

2008 ◽  
Vol 10 (2) ◽  
pp. 51 ◽  
Author(s):  
Carlos Aurélio Pimenta de Faria
Keyword(s):  
Federal Government ◽  
Intergovernmental Relations ◽  
Minas Gerais ◽  
Metropolitan Region ◽  
Intergovernmental Cooperation ◽  
State Constitution ◽  
Minas Gerais State ◽  
The Face ◽  
Belo Horizonte ◽  
The One

O objetivo do trabalho é analisar, de uma perspectiva geral e comparativa, o comportamento das lideranças políticas dos municípios pertencentes à Região Metropolitana de Belo Horizonte frente aos constrangimentos e incentivos às relações intergovernamentais, no âmbito metropolitano, proporcionados por três diferentes modelos de organização da cooperação intergovernamental: (a) aquele imposto pelo governo federal nos anos 1970, altamente hierarquizado; (b) o do “hipermunicipalismo simétrico”, instituído após a Constituição Estadual de Minas Gerais, de 1989; e (c) o de integração dita “negociada”, que está sendo implantado desde 2006. Objetiva-se analisar as estratégias adotadas pelos municípios da RMBH diante dos distintos graus de liberdade que lhes foram concedidos pelos três modelos, e da capacidade de monopolização da agenda e de priorização de determinados interesses por parte dos municípios do eixo econômico e dos governos estadual e federal.Palavras-chave: metrópoles; gestão metropolitana; relações intergovernamentais; Região metropolitana de Belo Horizonte; Ambel. Abstract: The paper aims to analyze, from a general and comparative perspective, the behavior of the political leadership of the municipalities that are part of Metropolitan Region of Belo Horizonte, Brazil, given the incentives and constraints to the intergovernmental relations, in the metropolitan sphere, posed by the three distinct models institutionalized to produce intergovernmental cooperation: (a) the one imposed by the Federal Government in the 1970s, highly hierarchical; (b) the one characterized by “symmetrical hipermunicipalism”, that was institutionalized after Minas Gerais State Constitution of 1989; and (c) the one of “negotiated integration”, which has been built since 2006. The objective is to analyze the strategies adopted by the municipalities in the face of the several degrees of autonomy conceded by the three models and of the capacity to monopolize the agenda and to give priority to certain interests by the municipalities belonging to the region’s economic axis and by state and federal government. Keywords: metropolis; metropolitan management; intergovernmental relations; Metropolitan Region of Belo Horizonte; Ambel.

scholarly journals Environmental stratification in the brazilian cerrado on the yield and fiber quality of cotton genotypes

2019 ◽  
Vol 35 (5) ◽  
Author(s):  
Mayara Fávero Cotrim ◽  
Francisco José Correa Farias ◽  
Luiz Paulo de Carvalho ◽  
Larissa Pereira Ribeiro Teodoro ◽  
Leonardo Lopes Bhering ◽  
...  
Keyword(s):  
Response Pattern ◽  
Fiber Strength ◽  
Fiber Quality ◽  
Block Design ◽  
Field Studies ◽  
Brazilian Cerrado ◽  
Randomized Complete Block Design ◽  
Cotton Genotypes ◽  
Environmental Stratification

Environmental stratification studies are important for the plant breeding, since they allow to adequately plan the experimental network. The objective of this work was to identify similar environments for cotton cultivation in the Brazilian Cerrado regarding yield and fiber quality. Nineteen field studies were carried out in a randomized complete block design with twelve genotypes and four replicates. Agronomic (cotton seed yield and fiber percentage) and technological traits (length, micronaire, fiber strength) were evaluated. These results indicate that there are six environments (PVA3, MON, SHE1, SIN, PPA e TRIN) in which the cotton trials should be installed as a matter of priority owing to the phenotypic response pattern obtained for the evaluated traits. The remaining 13 environments are similar to each other for all traits and can be summarized in strategic locations depending on the ease of installation of the trials.

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