scholarly journals Production of lettuce changes (lactuca sativa) submitted to different doses of Silicon

2020 ◽  
Vol 13 (1) ◽  
pp. 1
Author(s):  
T. O. D. Gonzaga ◽  
C. Araujo ◽  
A. L. Andrade ◽  
J. M. Dos Santos ◽  
G. B. Silva ◽  
...  
Keyword(s):  
Experimental Design ◽  
Analysis Of Variance ◽  
Lactuca Sativa ◽  
Dry Mass ◽  
Viable Alternative ◽  
Seedling Production ◽  
Tukey Test ◽  
Number Of Leaves ◽  
Shoot Mass ◽  
Different Doses

The objective of this work was to evaluate the effect of different doses of silicon on the production of lettuce seedlings. The treatments were arranged in a 4x2 factorial scheme, totaling 8 treatments. The first factor corresponded to 4 Si doses (Ca silicate) added to the substrate for seedling production (0; 13.3; 32.3 and 53.2 g.kg-1 of Si on the substrate). The second factor corresponded to two varieties of lettuce, being Mônica SF31 (Crespa) and Rafaela (Americana). The experimental design was the completely randomized, with 4 replicates. The number of leaves (NF), fresh aerial mass (MFPA), dry shoot mass (MSPA), fresh radicular mass (MFRA) and root dry mass (MSRA) were evaluated. Data were submitted to analysis of variance by the F test, and the means of the treatments compared by the Tukey test at 5% probability. The seedlings of the Mônica SF31 and Rafaela lettuce varieties do not present differences regarding the Si requirement for the production of MFPA, MSPA, MFRA and MSRA. The application of Si to the substrate can be a viable alternative for the production of lettuce seedlings with higher NF, MFPA, MSPA, MFRA and MSRA. Doses of 32.0 to 43.7 g.kg-1 of Si in the substrate are suitable for higher production of MFPA, MSPA, MFRA and MSRA of lettuce Mônica SF31. Doses of 31.5 to 39.8 g.kg-1 of Si in the substrate are suitable for higher production of MFPA, MSPA, MFRA and MSRA of Rafaela lettuce seedlings.

scholarly journals Profundidade de semeadura no desenvolvimento inicial de pseudocereais

2016 ◽  
Vol 11 (2) ◽  
pp. 182
Author(s):  
Daniele Brandstetter Rodrigues ◽  
Thais D'Avila Rosa ◽  
Jonas Albandes Gularte ◽  
Diego Cardoso de Medeiros ◽  
Lilian Vanusa Madruga de Tunes
Keyword(s):  
Experimental Design ◽  
Analysis Of Variance ◽  
Seedling Emergence ◽  
Dry Mass ◽  
Probability Of Error ◽  
Initial Development ◽  
Sowing Depth ◽  
Tukey Test

<p class="Default">O objetivo deste trabalho foi avaliar a influência da profundidade de semeadura na emergência de plântulas de sementes de  amaranto e quinoa. Foram avaliados os efeitos das profundidades de 0; 0,5; 1,0; 1,5 e 2,5 cm para amaranto e de 0; 1,5; 2,5; 3,5; e 4,5 cm para quinoa, obtidas por meio de anéis de pvc, com espessura equivalente a estes valores, que foram imersos no substrato para simular as profundidades de semeadura. O delineamento experimental foi inteiramente casualizado, com quatro repetições. Os dados foram submetidos à análise de variância e as médias, comparadas pelo teste de Tukey com 5% de probabilidade de erro. Foram realizados os testes de germinação, primeira contagem de germinação, emergência de plântulas em bandejas, massa de matéria seca e peso de mil sementes. A profundidade de semeadura para o melhor desenvolvimento inicial indicada para amaranto é de até 1,5 cm, e para quinoa até 2,5 cm.</p><p align="center"><strong><em>Seeding depth in the initial development of pseudocereals</em></strong></p><p class="Default"><strong>Abstract</strong><strong>: </strong>The objective of this study was to evaluate the influence of sowing depth on emergence of amaranth and quinoa seeds seedlings. The effects of the depths of 0; 0.5; 1.0; 1.5 and 2.5 cm and amaranth 0; 1.5; 2.5; 3.5; quinoa and 4.5 cm, obtained from PVC rings with a thickness equivalent to these values, which were immersed in the substrate to simulate the sowing depths. The experimental design was completely randomized, with four replications. The data were submitted to analysis of variance and the means were compared by Tukey test at 5% probability of error. The germination tests were carried out, first count, seedling emergence on trays, dry mass and weight of a thousand seeds. The seeding depth for the initial development best suited for Amaranthus is up to 1.5 cm, and quinoa to 2.5 cm. </p><p><strong> </strong></p>

scholarly journals INITIAL DEVELOPMENT OF GABIROBA (Campomanesia adamantium) ACCORDING TO FERTILIZATION WITH NITROGEN AND PHOSPHORUS

2021 ◽  
Vol 8 (2) ◽  
pp. e5825
Author(s):  
Jéssica Rodrigues de Mello Duarte ◽  
Scarlet De Aguiar Basílio ◽  
Nei Peixoto ◽  
Mariana Pina da Silva Berti
Keyword(s):  
Experimental Design ◽  
Plant Height ◽  
Nitrogen Fertilization ◽  
Stem Diameter ◽  
Nitrogen And Phosphorus ◽  
Initial Development ◽  
Tukey Test ◽  
Number Of Leaves ◽  
Plant Emergence ◽  
Different Doses

Campomanesia adamantium (Cambess.) Berg O. is a native of Savanna, popularly known as gabiroba, guavira, or gabiroba-do-campo, and has many uses, with its fruit being consumed fresh or processed. This study aimed to evaluate different doses of phosphorus and nitrogen in the initial development of gabiroba (Campomanesia adamantium) cultivated in pots. Five doses of phosphorus (0, 100, 200, 300, and 400kg ha-1 of P2O5) and three doses of nitrogen (0, 100, and 200 kg ha-1of N) were tested. The experimental design used was completely randomized in a 5x3 factorial scheme with six replications. The evaluations were carried out 120 days after plant emergence, and the variables analyzed were stem diameter, plant height, and number of leaves. Data were subjected to analysis of variance and F-test. The means were compared by the Tukey test at p0.05. Regression analyzes were adjusted for phosphorus doses. The gabiroba responds significantly to the addition of phosphorus, with the dose of 400 kg ha-1 of P2O5 providing the highest height and the dose of 300 kg ha-1 of P2O5 providing the greatest stem diameter and the number of leaves. Up to 120 days old, gabiroba seedlings do not respond significantly to nitrogen fertilization.

scholarly journals Hydrothermal treatments for overcoming dormancy in seeds of Mimosa ophthalmocentra Mart. ex Benth. (Fabaceae: Mimosoideae)

2017 ◽  
Vol 4 (7) ◽  
pp. 103-111
Author(s):  
Azenate Campos Gomes ◽  
Alecksandra Vieira de Lacerda ◽  
Riselane Lucena de Alcântara Bruno ◽  
Edna Ursulino Alves ◽  
Carina Seixas Maia Dornelas ◽  
...  
Keyword(s):  
Experimental Design ◽  
Water Temperature ◽  
Analysis Of Variance ◽  
Seed Dormancy ◽  
Environmental Conditions ◽  
Dry Mass ◽  
Semiarid Region ◽  
Tukey Test ◽  
Brazilian Semiarid ◽  
Emergence Percentage

The efficiency in the production of seedlings is decisive for the final result of their applicability. Therefore, strategies to ensure a rapid and uniform emergence are necessary, especially when it is associated with sustainable methods. The aim of this study was to evaluate the influence of different water temperatures as overcoming seed dormancy in Mimosa ophthalmocentra Mart. ex Benth., simply and economically, in the Brazilian Semiarid Region. The experimental design was completely randomized with four replications, each one consisting of 50 seeds, which were subjected to six treatments: intact seeds (T1/control) and seeds immersed in water at 55, 65, 75, 85, and 95 °C (T2, T3, T4, T5, and T6, respectively). Sowing was performed in trays under environmental conditions and evaluations were performed daily for 28 days. The emergence percentage, emergence speed index (ESI), and length and dry mass of seedlings were evaluated. Data were subjected to analysis of variance, and the means were compared by Tukey test (p < 0.05). M. ophthalmocentra has tegumentary dormancy, and its emergence was influenced by water temperature. Immersion of seeds in water at 75 ºC for 1 min provided the best result with 60% of emergence, ESI of 2.68, and seedlings with longer lengths and higher dry mass.

scholarly journals EFFECT OF DIFFERENT DOSES OF VERMICOMPOST ON THE GROWTH OF APULEIA LEIOCARPA (VOG) MACBR. SEEDLINGS

2005 ◽  
Vol 3 (2) ◽  
pp. 11 ◽  
Author(s):  
Marcos Vinicius Winckler Caldeira ◽  
Peter Spathelf ◽  
Leonir Rodrigues Barichello ◽  
Hamilton Luiz Munari Vogel ◽  
Mauro Valdir Schumacher
Keyword(s):  
Experimental Design ◽  
Biomass Production ◽  
Dry Matter ◽  
Growth Response ◽  
Diameter Growth ◽  
Seedling Production ◽  
Seedling Germination ◽  
Different Doses

The objective of this study was to determine the best vermicompost dose for seedling production of Apuleia leiocarpa. The experiment consisted of five treatments, which were conducted in a greenhouse. The following doses of vermicompost were tested: control (without vermicompost); 10% vermicompost; 20% vermicompost; 30% vermicompost and 40% vermicompost of the total container volume (185 cm3). The experimental design was entirely randomised. The substratum used was bark of Pinus sp., which was triturated and composted. A hundred days after seedling germination, the following variables were analysed: height and diameter growth, above ground dry matter, root dry matter and total dry matter. The 30% vermicompost doses showed to be optimum in growth response and biomass production of Apuleia leiocarpa seedlings.

scholarly journals Development of Plants in Combination of Products Associated with the Inoculation in the Soybeans Seeds Treatment

2017 ◽  
Vol 9 (9) ◽  
pp. 123
Author(s):  
Everton Vinicius Zambiazzi ◽  
Adriano Teodoro Bruzi ◽  
Frederico Dellano Souza Silva ◽  
Eric Vinicius Vieira Silva ◽  
Alan Mario Zuffo ◽  
...  
Keyword(s):  
Experimental Design ◽  
Seed Treatment ◽  
Aerial Part ◽  
Dry Matter ◽  
Dry Mass ◽  
Root Mass ◽  
Root Volume ◽  
Foliar Nitrogen ◽  
Soybean Plants ◽  
Shoot Mass

The purpose of this study was to evaluate the effect of different combinations of products applied through seed treatment, associated with the inoculation, in the development of soybean plants. The experiment was conducted in a greenhouse at Federal University of Lavras (UFLA). The experimental design was a randomized complete block, with four repetitions in a factorial 4 × 11, being four soybean cultivars and 11 combinations of products associated with the inoculation in the treatment of seeds. At the stage (R1) it was evaluated: plant height, leaf area, foliar chlorophyll content, number of trifoliate leaves, dry shoot mass, dry root mass, root length, root volume, nodules total number, viable nodules total number, nodules dry mass and foliar nitrogen content. The combination of products in the treatment of seeds, do not present phytotoxic effects in the characters related to the development, except for dry matter of aerial part and root volume. The combination of products in treatment of seeds influences negatively the nodulation, especially in the treatments with presence of nematicide. The inoculation performed in isolation or combined with fungicide and insecticide (I+FI) maintains nodule levels.

scholarly journals Utilização de diferentes substratos na propagação de Pyrostegia venusta através de estacas

2015 ◽  
Vol 10 (4) ◽  
pp. 38
Author(s):  
J. G. Crispim ◽  
M. M. Rêgo ◽  
E. R. Rêgo ◽  
Â. M. S. Pessoa ◽  
P. A. Barroso
Keyword(s):  
Analysis Of Variance ◽  
Leaf Length ◽  
Cattle Manure ◽  
Main Root ◽  
Plastic Tube ◽  
Tukey Test ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Pyrostegia Venusta

<p>Este trabalho teve por objetivo avaliar o desenvolvimento de clones de <em>Pyrostegia venusta </em>em diferentes tipos de substratos. O experimento foi conduzido em delineamento inteiramente casualizado, com 06 tratamentos e 10 repetições, cada repetição foi constituída por um tubete de polietileno com capacidade de 103cm<sup>3</sup>. Os tratamentos testados foram: (T1) 100% de areia lavada; (T2) 50% areia lavada + 50% substrato comercial Plantmax®; (T3) 100% de substrato comercial Plantmax®; (T4) 50% areia lavada + 50% de esterco bovino; (T5) 1/3 areia lavada + 1/3 esterco bovino +1/3 de Plantmax® e (T6) 50% esterco bovino + 50% de Areia lavada. Após 30 dias foram avaliados o número de estacas sobreviventes, comprimento do broto (cm), número de folhas, comprimento da folha (cm), número de raízes e comprimento da raiz principal (cm).  Os dados foram submetidos a análise de variância e as médias comparadas pelo teste de Tukey a 5% de probabilidade. Por meio da análise de variância (p&lt;0,01), detectou-se significância estatística, para as variáveis, sobrevivência das estacas e número de brotos por estaca de <em>P. venusta</em>, quando cultivadas em substrato composto por 50% areia lavada + 50% substrato comercial Plantmax®. Essa mistura apresenta a vantagem de ser mais econômica quando comparado ao substrato comercial Plantmax®, sendo portanto, recomendada na produção de mudas de <em>cipó-de-São João</em><em>.</em></p><p align="center"><strong><em>Utilization of different substrates in the propagation of Pyrostegia venusta by cuttings</em></strong></p><p><strong>Abstract</strong><strong>: </strong>The experiment was carried out in a completely randomized design with 06 treatments and 10 replicates, each replicate consisted of polyethylene plastic tube the size of 103cm<sup>3</sup>. The treatments were: (T1) 100% washed sand; (T2) 50% washed sand + 50% commercial substrate Plantmax®; (T3) 100% substrate commercial Plantmax®; (T4) 50 % washed sand + 50% cattle manure; (T5) 1/3 washed sand + 1/3 manure +1/3 Plantmax® and Plantmax (T6) 50 % cattle manure + 50% washed sand. After 30 days, were evaluated number of cutting survival, bud length in cm, number of leaves, leaf length in cm, number of roots and length of the main root. Data were submitted to analysis of variance and means were compared by Tukey test at 5% probability. By analysis of variance (p&lt; 0.01), there was significant differences for the variables, czutting survival and number of shoots per cutting when cultured on substrate composed of 50% washed sand + 50% commercial substrate Plantmax®. Furthermore, this mixture has the advantage to be cheaper as compared to substrate Plantmax®, so we recommend the seedlings of Saint John’s vine.</p><p><em><br /></em></p>

scholarly journals DOSES DE POTÁSSIO E LÂMINAS DE IRRIGAÇÃO NA QUALIDADE DE MUDAS DE EUCALIPTO

Nativa ◽  
2020 ◽  
Vol 8 (5) ◽  
pp. 643-649
Author(s):  
Antonio Henrique Cordeiro Ramalho ◽  
Fernanda Dalfior Maffioletti ◽  
Paulo André Trazzi ◽  
Eduardo Cordeiro Ramalho ◽  
Nilton Cesar Fiedler
Keyword(s):  
Water Management ◽  
Experimental Design ◽  
Aerial Part ◽  
Dry Mass ◽  
Control Treatment ◽  
Eucalyptus Urophylla ◽  
Tukey Test ◽  
Genetic Potential ◽  
Base Substrate

A produtividade florestal depende das potencialidades genéticas das matrizes, do ambiente proposto pelos substratos, frequência de irrigação, disponibilidade de luz, nutrição e das condições fitossanitárias. Assim, objetivou-se com o presente estudo analisar os efeitos da aplicação de potássio e de irrigação na qualidade de mudas de Eucalyptus urophylla. Para tal adotou-se o delineamento experimental em parcelas subdivididas definindo as 2 lâminas de irrigação (10 mm e 15 mm) como parcelas e os 5 níveis de potássio (0; 1,2; 2,4; 4,8; e 9,6 g L-1) como subparcelas, em 5 repetições compostas por 9 plantas. A comparação entre os métodos foi feita através teste de Tukey com 5% de probabilidade. Aos 120 dias, foram avaliadas: altura da parte aérea, diâmetro do colo, massa seca da parte aérea e da raiz. O tratamento testemunha apresentou as melhores médias em todos os parâmetros, sendo considerado o mais eficiente. A lâmina de irrigação de 15 mm foi considerada a mais eficiente. Portanto, conclui-se que qualquer que seja o incremento de potássio na produção de mudas, o mesmo deve se relacionar harmonicamente com a quantidade pré-existente no substrato base e com as exigências da cultura, de maneira que haja equilíbrio entre todas as partes. Palavras-chave: manejo hídrico; rustificação; substrato; casa de sombra.   IRRIGATION AND POTASSIUM LEVELS IN THE QUALITY OF EUCALYPTUS   ABSTRACT:  Forest productivity depends on the genetic potential of the matrices, the environment proposed by the substrates, frequency of irrigation, availability of light, nutrition and phytosanitary conditions. Thus, the aim of this study was to analyze the effects of potassium and irrigation on the quality of Eucalyptus urophylla seedlings. For this purpose, the experimental design was adopted in subdivided plots, defining the 2 layers of irrigation (10 mm and 15 mm) as plots and the 5 levels of potassium (0; 1.2; 2.4; 4.8; and 9.6 g L-1) as subplots, in 5 repetitions composed of 8 plants. The comparison between the methods was made using the Tukey test with a 5% probability. At 120 days, the following were evaluated: height of the aerial part, diameter of the neck, dry mass of the aerial part and the root. The control treatment showed the best averages in all parameters, being considered the most efficient. The 15 mm irrigation blade was considered the most efficient. Therefore, it is concluded that whatever the potassium increase in the production of seedlings, it must be harmoniously related to the pre-existing quantity in the base substrate and to the requirements of the culture, so that there is balance between all parts. Keywords: water management; rustification; substrate; shadow house.

scholarly journals Evaluación de Extractos Vegetales y Bioinsecticidas Sobre Poblaciones de Spodoptera frugiperda y Elasmopalpus lignosellus en Maíz

2017 ◽  
Vol 13 (21) ◽  
pp. 238
Author(s):  
Teddy Landívar Ortiz ◽  
Eduardo Colina Navarrete ◽  
Carlos Castro Arteaga ◽  
Danilo Santana Aragoné ◽  
Guillermo García Vásquez ◽  
...  
Keyword(s):  
Experimental Design ◽  
Economic Analysis ◽  
Analysis Of Variance ◽  
Spodoptera Frugiperda ◽  
The Other ◽  
Hybrid Corn ◽  
Tukey Test ◽  
Elasmopalpus Lignosellus ◽  
Organic Insecticides ◽  
Higher Doses

The research was carried out on the Property “El Cartan” that is located in Km 4 way at Puebloviejo-Ventanas, county of Los Ríos. A test was conducted on the hybrid corn DK-1040. This test measures the response of the larvae of insects Spodoptera frugiperda and Elasmopalpus lignosellus to the application of dose of biological and organic insecticides. Also, the most appropriate dose in products was determined with an economic analysis. The experimental design used was random complete blocks with seven treatments and three replicates. The variables evaluated are: percentage of larvae control, number of larvae per plant, corn damage, and yield for hectare. The evaluated variables were subjected to the analysis of variance, and Tukey test was applied to 95 % probability. The analyzed results were determined to apply Neem (Azadirachtina indica) in dose of 1,0 L ha -1 . It diminishes the populations of S. frugiperda and E. lignosellus in relationship to the other active matters applied in the test. Higher doses lead to migration of pests to nearby hosts. The highest yield per hectare was found in the Neem 1.0 L ha-1 treatment with 8,940 kg ha-1.

scholarly journals Allelopathic Effect of Crambe (Crambe abyssinica) Extract on Corn Seedlings

2019 ◽  
Vol 11 (5) ◽  
pp. 314
Author(s):  
Bruna de Villa ◽  
Reginaldo Ferreira Santos ◽  
Deonir Secco ◽  
Jair Antonio Cruz Siqueira ◽  
Luciene Kazue Tokura ◽  
...  
Keyword(s):  
Dry Mass ◽  
Allelopathic Effect ◽  
Soil Physics ◽  
Leaf Extracts ◽  
Initial Development ◽  
Crambe Abyssinica ◽  
Tukey Test ◽  
Shoot Mass ◽  
Plant Evaluation ◽  
Different Parts

The crambe crop is an interesting option for the production of biodiesel, mainly due to the high oil content (35%) and the corn one of the most implanted crops in Brazil. Thus, the objective of this work was to evaluate the allelopathic effect of crambe in the initial development of maize. The experiment was carried out in the laboratory of seed and plant evaluation (LASP) and laboratory of soil physics (LAFIS) of UNIOESTE-Cascavel. The seeds of corn with germination of 93.5% were submitted to four concentrations plus the control in the different parts of the crambe plant, where the growth and mass of corn were valued. The experimental design was completely randomized with 4 replicates per treatment. The statistical analysis consisted of analysis of variance and the means of the treatments were compared by the Tukey test at 5% of significance. The extract of the whole crambe plant stimulated aerial length, root length, fresh and dry mass of corn shoot. Root, stem and leaf extracts inhibited the initial development of maize in relation to growth and fresh and dry shoot mass.

scholarly journals Growth and yield of lettuce plants under salinity

2005 ◽  
Vol 23 (4) ◽  
pp. 931-934 ◽  
Author(s):  
Jerônimo L. Andriolo ◽  
Gean L. da Luz ◽  
Maiquel H. Witter ◽  
Rodrigo dos S. Godoi ◽  
Gisele T. Barros ◽  
...  
Keyword(s):  
Experimental Design ◽  
Nutrient Solution ◽  
Dry Mass ◽  
Growth And Yield ◽  
Fresh Weight ◽  
Electrical Conductivities ◽  
Salinity Levels ◽  
Number Of Leaves ◽  
Set Up ◽  
Positive Effect

Lettuce plants, cv. Vera, were grown under five salinity levels in a hydroponical experimental set-up using a 0.15 m deep sand growing bed. A standard nutrient solution was used, with the following composition, in mmol L-1: 16.9 NO3-; 2.0 H2PO4-; 1.0 SO4- 4.0 Ca++; 10.9 K+ e 1.0 Mg++, and, in mg L-1, 0.42 Mn; 0.26 Zn; 0,05 Cu; 0,50 B; 0,04 Mo, and 4.82 chelated Fe. The five salinity levels compared as treatments were obtained by varying the concentration of the standard nutrient solution, reaching average electrical conductivities (EC) of 0.80; 1.93; 2.81; 3.73 and 4.72 dS m-1, for T1, T2, T3, T4 and T5, respectively. The nutrient solution at each salinity level was supplied from a reservoir by means of a flooded-type electrical pump, for 15 minutes, at intervals of 90 minutes during the day and 420 minutes during the night. A completely randomised experimental design was used with four replications and 20 plants per plot. Four plants of each plot were harvested at 32 days after planting, to determine shoot and root dry mass, shoot fresh weight, leaf area and number of leaves per plant. Number of leaves was 18 per plant and was not affected by treatments. Dry mass of leaves increased 24,4% from T1 to T3. No relationships were found on data from stem and root dry mass. A positive effect of EC was recorded on shoot fresh mass, which increased 28.5% from T1 to T2, and decreased 16.5% from T2 to T5. Maximum LAI estimated value was 4.3 m² m-2 for an EC of 2.6 dS m-1. Salinity levels above 2.0 and 2.6 dS m-1 reduce fresh yield and plant growth, respectively.

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