scholarly journals INITIAL GROWTH OF COFFEE PLANTS FERTIGATED WITH LIQUID BIODIGESTER EFFLUENT

2021 ◽  
Vol 12 (2) ◽  
pp. 135
Author(s):  
Ernane Miranda Lemes ◽  
Diego Nogueira Moura ◽  
Benedicto Sanches Oliveira ◽  
Haroldo Silva Vallone ◽  
José Luiz Rodrigues Torres
Keyword(s):  
Initial Growth ◽  
Coffee Plants

O uso de fertirrigação com efluente líquido de biodigestor é uma alternativa interessante para redução dos custos de produção na cultura do café. O objetivo deste estudo foi avaliar o uso de diferentes doses de água residuária provenientes de um biodigestor, no desenvolvimento inicial do cafeeiro. O experimento foi conduzido em casa de vegetação modelo em arco, em vasos de 13 dm3. O delineamento utilizado foi de blocos ao acaso com seis doses de fertirrigação com efluente líquido de biodigestor. Os tratamentos constituíram em T1 = Água + Adubação mineral; T2 = Três aplicações/semana; T3 = Duas aplicações/semana; T4 = Uma aplicação/semana; T5 = Uma aplicação a cada 2 semanas; T6 = Uma aplicação a cada 3 semanas. Foi avaliada a altura de planta, diâmetro do caule, matéria verde e seca da parte aérea da planta bem como do sistema radicular e, teor foliar de macro e micronutrientes. Evidenciou-se que, a fertirrigação com efluente líquido de biodigestor não proporciona alterações significativas no desenvolvimento inicial de cafeeiros em casa de vegetação. Além disso, o uso do efluente líquido de biodigestor proporcionou níveis elevados de N, Ca, Mg, Fe e Mn, acimas dos níveis críticos determinados para a planta.

scholarly journals Sourgrass densities affecting the initial growth and macronutrient content of coffee plants

2013 ◽  
Vol 31 (1) ◽  
pp. 109-115 ◽  
Author(s):  
L.B Carvalho ◽  
P.L.C.A Alves ◽  
S Bianco
Keyword(s):  
Plant Growth ◽  
Coffea Arabica ◽  
Growth Characteristics ◽  
Initial Growth ◽  
Coffee Plant ◽  
Macronutrient Content ◽  
Randomized Design ◽  
Coffee Plants ◽  
Completely Randomized Design

The objective of this work was to evaluate the coexistence effects of coffee (Coffea arabica) with densities of sourgrass (Digitaria insularis) on crop macronutrient content and plant growth. The experiment was conducted in plots where one coffee plant was maintained in coexistence with 0 (weed-free check), 1, 2, 4, 8, and 16 sourgrass plants, using a completely randomized design with three replicates. Reduction of coffee growth and macronutrient content, except P that increased, started when the coexistence occurred with sourgrass plants in a density of 1 plant per plot. In general, macronutrient content was reduced by 18-50%, while growth characteristics were reduced by 9-41%, when coffee plants coexisted with 16 plants of sourgrass. Thus, sourgrass competition for nutrients was a strong factor limiting coffee plant growth.

scholarly journals Evaluation of leaf and root absorptions of glyphosate in the growth of coffee plants

2020 ◽  
Vol 87 ◽  
Author(s):  
Edimilson Alves Barbosa ◽  
Isabel Moreira da Silva ◽  
André Cabral França ◽  
Enilson de Barros Silva ◽  
Christiano da Conceição de Matos
Keyword(s):  
Leaf Area ◽  
Dry Mass ◽  
Initial Growth ◽  
Mass Ratio ◽  
Total Leaf Area ◽  
Reduced Dose ◽  
Number Of Leaves ◽  
Coffee Plants ◽  
Two Parameters ◽  
Hydroponic Conditions

ABSTRACT Intoxication by dispersion of glyphosate droplets in coffee seedlings is common and, in addition to the problem of drift, there are reports of contamination of this herbicide to a nontarget plant via the rhizosphere. Hydroponics allows the comparison of the translocation of the glyphosate absorbed by the foliage or the roots and avoids the interaction with the soil, which could hamper the achievement of more accurate conclusions when it is absorbed by the root. Thus, the toxicity of glyphosate sublethal dosages in the initial growth of coffee plants in hydroponics was evaluated by applying four sublethal dosages in two different locations (solution and leaf). Fifty days after the application of the herbicide, the intoxication percentage and the growth of the coffee seedlings were evaluated. From the reduced dose of 115.2 g·ha-1 of glyphosate, height reductions, root length; number of leaves, dry mass of leaf, roots and total, leaf area, and leaf mass ratio were observed. The first two parameters were observed only in leaf application and the others via leaf and solution. The aerial part–root ratio system had an increase in herbicide sublethal dosages when applied to leaves and the ratio of leaf area and specific leaf area increased in both applications. Sublethal dosages of glyphosate applied to young coffee plants under hydroponic conditions impair their growth, and it is more accentuated with increasing doses and when the leaves, instead of the roots, absorb the herbicide.

scholarly journals Brachiaria decumbens supresses the initial growth of Coffea arabica

2004 ◽  
Vol 61 (6) ◽  
pp. 579-583 ◽  
Author(s):  
Guilherme Faus da Silva Dias ◽  
Pedro Luís da Costa Aguiar Alves ◽  
Tomás Carneiro de Souza Dias
Keyword(s):  
Coffea Arabica ◽  
Plant Density ◽  
Growth Period ◽  
Experimental Period ◽  
Initial Growth ◽  
Brachiaria Decumbens ◽  
Asbestos Cement ◽  
Sensitive Characteristics ◽  
Coffee Plants ◽  
Coffea Arabica L

Brachiaria decumbens is becoming one the most common weeds growing in young coffee orchards because, besides its fast growth and difficulty of control, new coffee orchards are usually established in pasture areas. In order to verify the effect of B. decumbens plant density on the early growth of coffee (Coffea arabica L. cv. Catuaí Amarelo), a competition experiment was conducted under semi-controlled humidity conditions. Soil collected in a Typic Haplustox was placed in 70 L asbestos cement boxes and one coffee seedling was planted in each box. The B. decumbens seedlings were transplanted to the boxes at the 2-4 leaf stage. Treatments consisted of 0, 4, 8, 12, 16, 20, 24, 36, 48, and 60 weeds m-2. The experimental period started 120 days after transplanting and the experimental design was organized as completely randomized blocks, with four replicates. All coffee plant parameters evaluated were negatively affected by the interference. The most sensitive characteristics were leaf area (41.8% reduction with 8 plants m-2, reaching 68.7% at a density of 60 plants m-2). Therefore, at a density of 8 plants m-2 the reduction in leaf dry biomass was 41.4% compared with the check. At the density of 60 plants m-2 it was 72.8%. B. decumbens, at a density of 8 or more plants m-2, suppressed coffee plants during a growth period of 120 days.

scholarly journals EFEITO DE PARCELAMENTO DA FERTIRRIGAÇÃO COM N E K E SALINIDADE DO SOLO NO CRESCIMENTO INICIAL DE CULTIVARES DE CAFEEIRO

Irriga ◽  
2009 ◽  
Vol 14 (2) ◽  
pp. 145-157 ◽  
Author(s):  
Fabio Henrique de Souza Faria ◽  
Luiz Antonio Lima ◽  
Moisés Santiago Ribeiro ◽  
Fátima Conceição Rezende ◽  
Janice Guedes Carvalho
Keyword(s):  
Plant Growth ◽  
Soil Salinity ◽  
Initial Growth ◽  
Nacl Solution ◽  
Plant Mortality ◽  
Coffee Production ◽  
Lower Salinity ◽  
Salinity Levels ◽  
Coffee Plants ◽  
Fertilizer Solution

EFEITO DE PARCELAMENTO DA FERTIRRIGAÇÃO COM N E K E SALINIDADE DO SOLO NO CRESCIMENTO INICIAL DE CULTIVARES DE CAFEEIRO  Fábio Henrique de Souza Faria1; Luiz Antônio Lima2; Moisés Santiago Ribeiro2;Fátima Conceição Rezende2; Janice Guedes Carvalho3 1Departamento de Ciências Agráririas, Universidade Estadual de Montes Claros, Janaúba, MG,  [email protected] de Engenharia, Universidade Federal de Lavras, Lavras, MG, [email protected]; 3Departamento de Ciência do Solo, Universidade Federal de Lavras, Lavras-MG                                                        1 RESUMO  A cafeicultura irrigada tem tido grande expansão devido aos ótimos resultados de técnicas como a fertirrigação. Pode-se propiciar rápido crescimento inicial das plantas, porém, a salinidade excessiva da solução nutritiva pode causar limitação do crescimento e mortalidade das plantas. O N e o K são os principais elementos aplicados em cobertura com dose recomendada de 4 gplanta-1 mês-1, respectivamente. Este trabalho teve por objetivo avaliar o crescimento inicial de plantas de cafeeiro ‘Catuaí’ e ‘Catucaí’ e a salinidade do solo resultante da fertirrigação com N (uréia) e K (KCl) na dosagem supracitada, parcelada a cada 2, 4, 6 e 8 semanas. O experimento foi conduzido em casa de vegetação da UFLA/DEG, Lavras-MG, com plantas em vasos de 13 L irrigadas à tensões entre 20 e 30 kpa durante 24 semanas. Avaliou-se a condutividade elétrica (CE) da solução fertilizante e do solo, altura de planta e diâmetro de caule para ciclos de 8 semanas. Os resultados indicaram que a dose de fertilizante foi excessiva, causando a mortalidade das plantas após 2 ciclos, à exceção do controle. As cultivares  toleraram salinidade do solo  CEea = 1,2 dS m-1. Apesar da CE da solução aplicada ser elevada, os resultados se mostraram superiores aos de trabalhos similares com solução de NaCl  para níveis inferiores de salinidade. UNITERMOS: irrigação, café, fertilização, condutividade elétrica  FARIA, F. H. S.; LIMA, L. A.; RIBEIRO, M. S.; REZENDE, F. C.; CARVALHO, J. G. EFFECTS OF N AND K FERTIRRIGATION FRACTIONAL AND SOIL SALINITY ON COFFEE VARIETIES GROWTH.  2 ABSTRACT Irrigated coffee production has expanded because of the excellent results of techniques such as fertigation. It can provide rapid initial growth; however, the salinity of excessive nutrient solution can limit plant growth and cause plant mortality. N and K are mainly used in covering layers and their recommended doses are 4 gplant-1 month-1. This study aimed to assess the initial growth of 'catuaí' and 'catucaí' coffee plants and soil salinity resulting from fertigation with N (urea) and K (KCl) according to the indicated doses and fractionated every 2, 4, 6 and 8 weeks. The experiment was carried out in a greenhouse of UFLA/DEG, Lavras-MG, Brazil, where 13-l vases were irrigated under soil water tensions between 20 and 30 kpa during 24 weeks. The following were evaluated:  CE fertilizer solution and CE soil solution, plant height and shoot diameter after 8-week cycles. Results indicated that the used fertilizer dose was excessive, causing plant death after 2 cycles, except for the control. These varieties resisted soil salinity (CEea = 1.2 ds m-1). Despite the CE of the applied fertilizer solution be high, the results were higher than those of similar studies with NaCl solution to lower salinity levels. KEYWORDS: irrigation, coffee, fertilization, electric conductivity

scholarly journals Growth of seedlings and young plants of coffee in composts of textile industry residues

2019 ◽  
Vol 23 (3) ◽  
pp. 188-195
Author(s):  
Eudes Neiva Júnior ◽  
André C. França ◽  
Paulo H. Grazziotti ◽  
Douglas W. B. Porto ◽  
Fausto H. V. Araújo ◽  
...  
Keyword(s):  
Textile Industry ◽  
Conventional Treatment ◽  
New Technologies ◽  
Environmental Problem ◽  
Initial Growth ◽  
Potted Plants ◽  
Final Destination ◽  
Coffee Plants ◽  
Growth Of Seedlings ◽  
Organic Compost

ABSTRACT The final destination of solid industrial waste is one of the main environmental problems currently facing, due to its potential for contamination. With the evolution of environmental policy and awareness, the proper destination of these wastes is stimulated, seeking new technologies to fulfil the demand for the products generated. One of the solutions to this environmental problem is to use these residues as fertilizers in agriculture. The objective of this study was to evaluate the use of toxic textile residues as a substrate component of coffee seedlings and as fertilizer in the initial growth of coffee plants. The study was divided into three experiments: production of seedlings, initial growth of potted plants and in the field. In the production of seedlings, the treatments consisted of different proportions of organic compost residues from the textile industry: 0, 4, 8, 16 and 32% and a conventional treatment of seedling production. In pots and in the field, the same treatments were used with organic compound, and a conventional planting treatment. In the three experiments, plant growth and nutritional analyses were performed. The conventional treatment provided better development of the seedlings and the potted and field coffee plants for most of the evaluated parameters. The treatments between 8 and 16% of organic compost showed an acceptable development of coffee plants, demonstrating their potential as fertilizer.

scholarly journals Effects of mycorrhizal association and phosphate fertilization on the initial growth of coffee plants

2020 ◽  
Vol 50 ◽  
Author(s):  
Fausto Henrique Vieira Araújo ◽  
Rafaele de Souza Cruz ◽  
Douglas William Batista Porto ◽  
Caroline Maíra Miranda Machado ◽  
André Cabral França
Keyword(s):  
Mycorrhizal Fungi ◽  
Block Design ◽  
Arbuscular Mycorrhizal ◽  
Initial Growth ◽  
Leaf Chlorophyll ◽  
Randomized Block Design ◽  
Mycorrhizal Association ◽  
Phosphate Fertilization ◽  
Different Types ◽  
Coffee Plants

ABSTRACT In the establishment of coffee crops, phosphate fertilization is one of the most important soil fertility managements. Aiming to minimize losses, among the options in use are fertilizers with a slow release of nutrients, combined with the inoculation of arbuscular mycorrhizal fungi (AMF). This study aimed to evaluate the initial growth of coffee plants inoculated with AMF and submitted to different types of phosphate fertilizers. The experiment was conducted in a greenhouse, using a complete randomized block design, in a 2 x 4 factorial scheme, with four replications. The first factor referred to the presence or absence of AMF (Rhizophagus clarus) and the second one to phosphate [monoammonium phosphate (MAP)], pelletized organomineral and grainy organomineral fertilizers, as well as a control (without fertilization). The plant height, leaf chlorophyll content, number of plagiotropic branches, leaf area, shoot and root dry matter mass, percentage of root colonization and leaf phosphorus were evaluated. The inoculation with AMF, associated with the pelletized organomineral fertilizer, provided a higher growth for the shoot and root system and higher phosphorus contents, in relation to the other treatments, and it can be an alternative to the implantation or renewal of coffee crops.

Soil application of silicon enhances initial growth and nitrogen use efficiency of Arabica coffee plants

2021 ◽  
pp. 1-11
Author(s):  
Renan J. Parecido ◽  
Rogério P. Soratto ◽  
Fernando V. C. Guidorizzi ◽  
Marcos J. Perdoná ◽  
Harun I. Gitari
Keyword(s):  
Nitrogen Use Efficiency ◽  
Initial Growth ◽  
Nitrogen Use ◽  
Arabica Coffee ◽  
Soil Application ◽  
Use Efficiency ◽  
Coffee Plants

Epitaxial growth manner and structure of superconducting oxide films

1990 ◽  
Vol 48 (4) ◽  
pp. 2-3
Author(s):  
Yoshichika Bando ◽  
Takahito Terashima ◽  
Kenji Iijima ◽  
Kazunuki Yamamoto ◽  
Kazuto Hirata ◽  
...  
Keyword(s):  
Ultrathin Films ◽  
Film Surface ◽  
High Energy ◽  
Epitaxial Films ◽  
Layer By Layer ◽  
Initial Growth ◽  
In Situ Growth ◽  
High Quality ◽  
Activated Reactive Evaporation

The high quality thin films of high-Tc superconducting oxide are necessary for elucidating the superconducting mechanism and for device application. The recent trend in the preparation of high-Tc films has been toward “in-situ” growth of the superconducting phase at relatively low temperatures. The purpose of “in-situ” growth is to attain surface smoothness suitable for fabricating film devices but also to obtain high quality film. We present the investigation on the initial growth manner of YBCO by in-situ reflective high energy electron diffraction (RHEED) technique and on the structural and superconducting properties of the resulting ultrathin films below 100Å. The epitaxial films have been grown on (100) plane of MgO and SrTiO, heated below 650°C by activated reactive evaporation. The in-situ RHEED observation and the intensity measurement was carried out during deposition of YBCO on the substrate at 650°C. The deposition rate was 0.8Å/s. Fig. 1 shows the RHEED patterns at every stage of deposition of YBCO on MgO(100). All the patterns exhibit the sharp streaks, indicating that the film surface is atomically smooth and the growth manner is layer-by-layer.

Nucleation and initial growth of Pd2Si crystals on Si(111)

1993 ◽  
Vol 51 ◽  
pp. 844-845
Author(s):  
Xianghong Tong ◽  
Oliver Pohland ◽  
J. Murray Gibson
Keyword(s):  
High Vacuum ◽  
Dark Field ◽  
Ultra High Vacuum ◽  
Initial Growth ◽  
Surface And Interface ◽  
Dark Field Imaging ◽  
Transmission Electron ◽  
Initial Stage ◽  
Effect Of Surface

The nucleation and initial stage of Pd2Si crystals on Si(111) surface is studied in situ using an Ultra-High Vacuum (UHV) Transmission Electron Microscope (TEM). A modified JEOL 200CX TEM is used for the study. The Si(111) sample is prepared by chemical thinning and is cleaned inside the UHV chamber with base pressure of 1x10−9 τ. A Pd film of 20 Å thick is deposited on to the Si(111) sample in situ using a built-in mini evaporator. This room temperature deposited Pd film is thermally annealed subsequently to form Pd2Si crystals. Surface sensitive dark field imaging is used for the study to reveal the effect of surface and interface steps.The initial growth of the Pd2Si has three stages: nucleation, growth of the nuclei and coalescence of the nuclei. Our experiments shows that the nucleation of the Pd2Si crystal occurs randomly and almost instantaneously on the terraces upon thermal annealing or electron irradiation.

Germination and initial growth of triticale seeds under stationary magnetic fields

2014 ◽  
Vol 2 (2) ◽  
pp. 72-79 ◽  
Author(s):  
Mercedes Florez ◽  
Elvira Martinez ◽  
Victoria Carbonell
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Seed Vigor ◽  
Initial Growth ◽  
Practical Application ◽  
Biochemical Processes ◽  
Mean Germination Time ◽  
Nutrition Value ◽  
The Mean ◽  
Growth Of Seedlings

The main objective of this study is to determine the effects of 125 mT and 250mT magnetic treatment on the germination and initial growth of triticale seeds. This objective has a practical application in agriculture science: early growth of triticale. An increase in the percentage and rate of germination of seeds and a stimulation of growth of seedlings as positive response to magnetic field treatment in rice, wheat, maize and barley seeds have been found in previous studies. Germination tests were carried out under laboratory conditions by exposing triticale seeds to magnetic field for different times. The effect was studied by exposure of seeds prior sowing. The mean germination time were reduced for all the magnetic treatments applied. Most significant differences were obtained for time of exposure of 1 and 24 hours and maximum reductions was 12%. Furthermore, seedlings from magnetically treated seeds grew taller than control. The longest mean total length was obtained from seedlings exposed to 125 and 250 mT for 24 hours. External magnetic fields are assumed to enhance seed vigor by influencing the biochemical processes by stimulating activity of proteins and enzymes. Numerous studies suggested that magnetic field increases ions uptake and consequently improves nutrition value.

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