scholarly journals Initial Growth of Amburana cearensis in Decomposed Buriti Stem Substrate and Nitrogen Doses

2018 ◽  
Vol 10 (7) ◽  
pp. 497
Author(s):  
Augusto Matias de Oliveira ◽  
Wéverson Lima Fonseca ◽  
Tiago De Oliveira Sousa ◽  
Hingrid Raiany Santos Teixeira ◽  
Fernandes Antonio de Almeida ◽  
...  
Keyword(s):  
Native Species ◽  
Significant Interaction ◽  
Aerial Part ◽  
Slow Growth ◽  
Dry Mass ◽  
Initial Growth ◽  
Initial Development ◽  
Randomized Design ◽  
Completely Randomized Design

One of the difficulties of producing native species seedlings is slow growth. The objective of this study was to evaluate the initial development of Amburana cearensis (Allem.) A. C. Smith in relation to the concentration decomposed buriti stem substratum and nitrogen doses. A completely randomized design was used in a factorial arrangement of 3 × 5 (proportions of decomposed buriti stem × nitrogen doses), with six replicates. The treatments were formulated substrates comprised of decomposed buriti stem manually mixed with soil (Dystrophic Yellow Latosol) in three proportions (0, 25 and 50%) and five nitrogen doses (0, 100, 200, 300 and 400 mg dm-3) applied in treatments. There was no significant interaction between the DRM and ND factors. However, there was an isolated effect for the following variables: Plant height (PH), stem diameter (SD), leaf number (LN), leaf area (LA), dry mass of the aerial part (DMA) and root length (RL). The best concentrations of the substrate for the variables PH, LA and DMA were 25% and 50%, whereas for SD, LN and RL, the best result was 50%. ND and other variables had good responses under recommended doses ranging from a minimum of 264.82 mg dm-3, observed in DMA, and a maximum of 400 mg dm-3, observed in RL. Both factors positively the quality of umburana seedlings.

scholarly journals EFFECTS OF SUBSTRATE AND WATER AVAILABILITY ON THE INITIAL GROWTH OF Alibertia edulis RICH.

FLORESTA ◽  
2018 ◽  
Vol 49 (1) ◽  
pp. 089 ◽  
Author(s):  
Tatiane Sanches Jeromini ◽  
Leandro Henrique de Sousa Mota ◽  
Silvana De Paula Quintão Scalon ◽  
Daiane Mugnol Dresch ◽  
Lourenço Quintão Scalon
Keyword(s):  
Water Availability ◽  
Native Species ◽  
Water Retention ◽  
Water Levels ◽  
Chicken Manure ◽  
Initial Growth ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Red Latosol

Alibertia edulis Rich. is a native species of the Brazilian Cerrado and can be used for reforestation of degraded areas. In addition, it produces edible fruits. The objective of this study was to evaluate the effect of substrates and water levels on the emergence, initial growth, and quality of seedling of A. edulis. The substrates tested were: latosol (L), latosol + sand (L + S = 1:1), latosol + sand + chicken manure (L + S1 + CM = 1:1:0,5), latosol + sand + chicken manure (L + S2 + CM = 1:2:0,5), and latosol + commercial substrate (L + C = 1:1); and the water retention capacities (WRC) tested were: 25, 50, 75, and 100%. The experiment was carried through in a completely randomized design and subdivided into a plot scheme, in which the plots represented water availability and the subplots represented the substrates. Latosol + commercial substrate at 100% of WRC provided the best conditions for emergence, initial growth and formation of seedlings of A. edulis. Sowing in the substrate Dystroferric Red Latosol isolated at 25% of WRC should not be used for the formation of seedlings of this species.

scholarly journals EMISSÃO DE ÓXIDO NITROSO ASSOCIADO AO USO DE UREIA NO CULTIVO DE MELÃO AMARELO

Nativa ◽  
2018 ◽  
Vol 6 (6) ◽  
pp. 600
Author(s):  
Vanessa Cláudia Vasconcelos Segundo ◽  
Renato Innecco ◽  
Ebenézer De Oliveira Silva
Keyword(s):  
Leaf Area ◽  
Aerial Part ◽  
Dry Mass ◽  
Nitrogen Fertilizers ◽  
Root Part ◽  
Randomized Design ◽  
Number Of Leaves ◽  
Completely Randomized Design ◽  
Brazilian Northeast ◽  
Total Soil Nitrogen

O meloeiro tem grande importância econômica para o Nordeste brasileiro. Entretanto, em seu cultivo utiliza-se insumos que podem prejudicar o ambiente; como, os fertilizantes nitrogenados. Objetivou-se avaliar a emissão de N2O em cultivo de meloeiro amarelo ‘Goldex’. O experimento foi instalado em delineamento inteiramente casualizado, com cinco repetições. Os tratamentos foram: 0 (controle), 1,0; 1,5 e 2 vezes a quantidade de nitrogênio recomendada para cada estádio. Foi analisado o fluxo de N2O, área foliar, número de folhas, massa seca da parte aérea, massa seca dos frutos, massa seca da parte radicular, nitrogênio total do solo, das plantas e N (NH4+ e NO3-) do solo. O fluxo de N2O teve comportamento temporal irregular durante a fase de plântulas e crescente na floração. Os tratamentos afetaram significativamente a área foliar, número de folhas, massa seca da parte aérea, massa seca da parte radicular, nitrogênio da parte aérea e parte radicular das plantas e do solo. A aplicação de nitrogênio, em dosagens superiores à recomendada, não aumentou a produção do meloeiro. E o cálculo do fator de emissão mostrou que a emissão do N2O não atingiu valores prejudiciais ao ambiente.Palavras-chave: fator de emissão, efeito estufa e nitrogênio. NITROUS OXIDE EMISSION ASSOCIATED WITH UREA USE THE YELLOW MELON CROP ABSTRACT: The melon has great economic importance for the Brazilian Northeast. However, in its cultivation uses inputs that can harm the environment; Such as nitrogen fertilizers. The objective of this study was to evaluate the emission of N2O in yellow 'Goldex' cultivar. The experiment was installed in a completely randomized design with five replications. The treatments were: 0 (control), 1.0; 1.5 and 2 times the amount of nitrogen recommended for each stage. N2O flux, leaf area, leaf number, shoot dry mass, fruit dry mass, dry mass of the root portion, total soil nitrogen, of the plants and N (NH4 + and NO3 -) of the soil were analyzed. The flow of N2O had irregular temporal behavior during the seedling phase and increased in flowering. The treatments affected significantly the leaf area, number of leaves, dry mass of the aerial part, dry mass of the root part, nitrogen of the aerial part and root part of the plants and the soil. The application of nitrogen, in dosages higher than the recommended one, did not increase the production of the melon. And the calculation of the emission factor showed that the emission of N2O did not reach values harmful to the environment.Keywords: emission fator, greenhouse and nitrogen.

scholarly journals Trichoderma Contributes to the Germination and Seedling Development of Açaí Palm

Agriculture ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 456
Author(s):  
Bruno Fróes Campos ◽  
Anselmo Junior Corrêa Araújo ◽  
Cristina Aledi Felsemburgh ◽  
Thiago Almeida Vieira ◽  
Denise Castro Lustosa
Keyword(s):  
Dry Mass ◽  
Initial Growth ◽  
Randomized Design ◽  
Trichoderma Isolate ◽  
Number Of Leaves ◽  
Collar Diameter ◽  
Completely Randomized Design ◽  
Set Up ◽  
Root Size ◽  
Trichoderma Isolates

The application of Trichoderma fungus can be used to obtain seedlings of higher quality for plantations. The objective of this study was to evaluate the effects of Trichoderma isolates on the germination and initial growth of açaí seedlings. Two trials were set up. In the laboratory, the seeds were inoculated in suspensions prepared with each of the isolates for 24 h, and they were arranged in trays containing filter paper in a completely randomized design with five replicates containing 50 seeds each. For the control, the seeds were submerged only in water. Part of the seedlings resulting from seeds treated and not treated with Trichoderma were transferred to bags containing forest soil and were submitted to seven modes of application of Trichoderma and kept in a nursery. The speed of germination and hypocotyl were not influenced by the biological treatment. The application of the different Trichoderma isolates positively influenced the height, collar diameter, number of leaves, root size, leaf area and root, and aerial part dry mass of the açaí seedlings. The application of the Trichoderma isolate TAM01 on the preplanting substrate and biweekly applications on the postplanting substrate was the combination that most positively influenced the development of açai seedlings.

scholarly journals Silicon Potential as Attenuator of Salinity Effects on Growth and Post-harvest Quality of Lettuce

2018 ◽  
Vol 10 (7) ◽  
pp. 455
Author(s):  
Hozano De Souza Lemos Neto ◽  
Marcelo De Almeida Guimarães ◽  
Rosilene Oliveira Mesquita ◽  
Italo Marlone Gomes Sampaio ◽  
Ana Régia Alves de Araújo Hendges ◽  
...  
Keyword(s):  
Plant Growth ◽  
Titratable Acidity ◽  
Dry Mass ◽  
Soluble Solids ◽  
Saline Stress ◽  
Post Harvest ◽  
Randomized Design ◽  
Salinity Levels ◽  
Completely Randomized Design

Silicon (Si) is a mineral element that provides many benefits to plants and may also assist in tolerance to abiotic stresses such as salinity. The aim of the study was to evaluate the use of Si as a possible attenuator of the deleterious effects of salinity on growth and post-harvest of lettuce. A completely randomized design with four replicates was performed in a 3 × 2 factorial, consisting of three salinity levels (1.65, 3.65, 7.65 dS m-1) and two levels of silicon (0.0 and 2.0 mM). Salinity reduced all variables related to plant growth. For shoot fresh and dry mass, it was observed that NaCl caused a reduction of 79.80 and 80%, respectively, in comparison to the control. However, parameters related to post-harvest such as titratable acidity, soluble solids and vitamin C increased with salinity. Although not effective in reducing saline stress on plant growth, Si provided improvements in the variables related to lettuce post-harvest. Salinity significantly reduced plant growth in the presence and absence of Si, but provided better post-harvest quality with Si.

scholarly journals PHYSIOLOGICAL QUALITY OF Brachiaria brizantha SEEDS TREATED WITH FUNGICIDE AND INSECTICIDE

2018 ◽  
Vol 31 (3) ◽  
pp. 651-656
Author(s):  
ERIC FABIANO SERAGUZI ◽  
CARLOS HENRIQUE QUEIROZ REGO ◽  
FERNANDA BRITO CARDOSO ◽  
ANA CARINA DA SILVA CÂNDIDO ◽  
CHARLINE ZARATIN ALVES
Keyword(s):  
Root Development ◽  
Dry Mass ◽  
Brachiaria Brizantha ◽  
Thiophanate Methyl ◽  
Physiological Characterization ◽  
Randomized Design ◽  
Phytotoxic Effect ◽  
Physiological Quality ◽  
Completely Randomized Design

ABSTRACT This study aimed to evaluate the effects of chemical treatment of seeds with fungicide and insecticide on the seed physiological quality of Brachiaria brizantha cultivar MG5. Two experiments with four replicates were carried out in a completely randomized design. In the first experiment, the seeds were treated with the fungicide pyraclostrobin + fipronil + thiophanate-methyl and in the second, with the insecticide thiamethoxam, both at doses of 0, 150, 300, 450, and 600 mL of commercial product (CP)/100 kg of seeds. Physiological characterization was done on the basis of the first germination count, germination (%), emergence (%), emergence speed index, and length and dry mass of shoot and root. The treatment of B. brizantha seeds with the fungicide pyraclostrobin + fipronil + thiophanate-methyl benefits the physiological quality of seeds, improving germination and root development, with no phytotoxic effect up to the dose of 600 mL of CP/100 kg of seeds. The insecticide thiamethoxam has a biostimulating effect on B. brizantha cultivar MG5 up to the dose of 270 mL of CP/100 kg of seeds, but is phytotoxic in larger doses.

scholarly journals Growing levels of goat biofertilizer in the initial growth of the pepper

2020 ◽  
Vol 12 (3) ◽  
pp. 63-71
Author(s):  
Davy Frazão Lima ◽  
Antonio Caio de Jesus ◽  
Diego De Almeida Veras ◽  
Ramón Yuri Ferreira Pereira ◽  
Dário De Sousa Ramos ◽  
...  
Keyword(s):  
Data Collection ◽  
Growth And Development ◽  
Pepper Plant ◽  
Initial Growth ◽  
Capsicum Frutescens ◽  
Initial Development ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Goat Manure ◽  
Chili Peppers

Biofertilizers have been used in agroecological production with the aim of improving conditions for plant development. The objective of the research was to evaluate the effect of the application of biofertilizer on the initial development of chili peppers (Capsicum frutescens L.). The experiment was installed and conducted under field conditions from October to December 2018, in Chapadinha, city located in Maranhão. A completely randomized design was used, with 4 treatments and 5 repetitions. The experiment corresponded to the application of biofertilizer in concentrations T1: 0%, T2: 20%, T3: 40%, T4: 60% of goat biofertilizer diluted in water. The goat biofertilizer was made using 25 kg of fresh goat manure, 200 g of ash and 500 g of brazilian candy called rapadura. Seedlings with eight definitive leaves were transplanted 0.8 x 1 m apart. The first application of the biofertilizer was performed 15 days after transplanting and the following applications of the biofertilizer were carried out at 10-day intervals until data collection. At 60 days after transplantation, data for each variable were collected. It was observed that the variables responded well to the biofertilizer, revealing significant increases in the growth and development of the pepper plant. It is recommended 4 (four) applications of doses of goat biofertilizer with a concentration between 46% (460 ml L-1) to 48% (480 ml L-1) to obtain pepper seedlings with good phytotechnical quality, because in this range the best results were found for most of the analyzed variables.

scholarly journals Crescimento e produção de alface em resposta a níveis de drilocomposto e NPK

2020 ◽  
Vol 16 (3) ◽  
pp. 18-26
Author(s):  
Angelita Aparecida Coutinho Picazevicz ◽  
Arnaldo Libório Santos Filho ◽  
Leonardo dos Santos França Shockness ◽  
Luana Silva Lima ◽  
Karoliny Fim da Silva ◽  
...  
Keyword(s):  
Aerial Part ◽  
Dry Matter ◽  
Dry Mass ◽  
Root Mass ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Npk Fertilization

The objective was to evaluate the effects of levels of compost and fertilization with NPK on growth and production of lettuce. The experiment was carried out in a greenhouse, in a completely randomized design in a 6 x 2 factorial scheme, with four replications, considering six levels of compost (0; 25; 50; 75; 100 and 125 g plant-1) and absence and presence fertilization with NPK. The evaluated parameters were number of total and commercial leaves, mass of fresh commercial and total aerial part, mass of commercial and total dry aerial part, dry root mass and total dry mass. There was an interaction between the drilocomposite and NPK fertilization for the evaluated parameters, except for root dry matter. The fertilization with NPK increased the growth and production of lettuce when there was no application of the compost. Likewise, that the levels of this fertilizer increased the growth and production of lettuce only in the absence of NPK. The application of drilocomposite increases the growth of lettuce plants and can replace fertilization with NPK.

scholarly journals Development of Moringa OleiferaLAM. seedlings in different substrates

2021 ◽  
Vol 17 (2) ◽  
pp. 09-15
Author(s):  
Neisiany Rebelo Pimentel ◽  
Daniela Pauletto ◽  
Àdria Fernandes da Silva ◽  
Thiago Gomes da Silva Oliveira ◽  
Orlanilson da Silva Brito
Keyword(s):  
Poultry Litter ◽  
High Capacity ◽  
Dry Mass ◽  
Climatic Conditions ◽  
Arid Soils ◽  
Coconut Fiber ◽  
Initial Development ◽  
Randomized Design ◽  
Completely Randomized Design ◽  
Base Substrate

Moringa oleiferaLam., known as moringa, is an arboreal plant belonging to the Moringaceae family, native to India,and has a high capacity to adapt to climatic conditions and arid soils. In this study we evaluated the initial development of seedlings of M. oleiferaLam. under different substrates conditions. The experiment was conducted in a completely randomized design, consisting of eight treatments resulting from combinations of the base substrate (85% soil, 3% carbonized rice straw and 12% coconut fiber). At 60 days after sowing, plant height, stem diameter, dry mass of the aerial part and root system, total dry mass were evaluated, in addition to the Dickson quality index (IQD). The best seedling growth occurred using the combination of 20% poultry litter and 10% bovine manure. Seedlings produced with substrates formulated with 20% poultry litter and 10% bovine manure showed gains in the evaluated variables, which could be a viable alternative for the production of moringa seedlings.

scholarly journals Antioxidant activity and physiological performance of popcorn seed after saline stress and analysis of seedling images

2020 ◽  
Vol 44 ◽  
Author(s):  
Hugo Cesar Rodrigues Moreira Catão ◽  
Franciele Caixeta ◽  
Amanda Moreira Lopes ◽  
Flavia Andrea Nery-Silva ◽  
Adílio de Sá Júnior
Keyword(s):  
Antioxidant Activity ◽  
Salt Stress ◽  
Dry Mass ◽  
Saline Stress ◽  
Physiological Performance ◽  
Randomized Design ◽  
Physiological Quality ◽  
Completely Randomized Design ◽  
The Relationship

ABSTRACT Salinity influences all germination stages and may adversely affect seedling establishment in the field. The objective of this research was to determine the relationship between the antioxidant activity and the physiological performance of seeds and to verify the efficacy of the imaging analysis of popcorn seedlings after seed exposure to saline stress. A completely randomized design was used that consisted of four replicates in a factorial scheme. This scheme comprised three popcorn hybrids (P618, AP6002, and AP8203) and five saline potential levels (0.0; -0.1; -0.3; -0.6, and -0.9 MPa) that were obtained from KCl solutions of different concentrations. First count germination, germination and seedling vigor classification (strong normal seedlings), and dry mass of seedlings were evaluated to determine the physiological quality of the seed. The images of seedlings were used to evaluate the coleoptile and root lengths, indices of vigor, uniformity, and growth using the Groundeye® software. The activities of the antioxidant enzymes superoxide dismutase (SOD), ascorbate peroxidase (APX), and catalase (CAT) were also determined. Saline stress compromises the physiological quality and antioxidant activity of seeds and the performance of popcorn seedlings. Computerized image analysis using Groundeye® was efficient in evaluating the popcorn seedlings after being subjected to salt stress. Hybrids AP6002 and AP8203 were more tolerant to salt stress than hybrid P618.

scholarly journals Emergência e crescimento de alface (Lactuca sativa L.) submetida a substratos orgânicos

2017 ◽  
Vol 12 (2) ◽  
pp. 348
Author(s):  
Franciele Mara Lucca Zanardo Bohm ◽  
Adriana Strieder Philippsen ◽  
Débora Larissa de Oliveira ◽  
Lucas Henrique Teixeira Garcete ◽  
Paula Bonomo Bertola ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Dry Mass ◽  
Fresh Mass ◽  
Initial Growth ◽  
Organic Substrates ◽  
Randomized Design ◽  
Significant Difference ◽  
Lettuce Growth ◽  
Completely Randomized Design ◽  
Sustainable System

<p>A agricultura orgânica se destaca como modo de produção que consiste em um sistema sustentável. Um dos desafios desse método de cultivo é a produção de alimentos com qualidade em quantidades suficientes sem comprometer o meio ambiente. Objetivou-se analisar o efeito de substratos orgânicos na germinação e crescimento inicial de alface. O experimento foi conduzido em delineamento inteiramente casualizado com quatro tratamentos (substratos) e duas repetições. Foram testados os substratos: composto de Sibipiruna, substrato comercial, composto de Sibipiruna com chorume e substrato comercial com chorume. O chorume foi obtido exclusivamente da decomposição de vegetais. Foi avaliado o efeito dos substratos pelo percentual de germinação, massa fresca, massa seca e comprimento da radícula. Pôde-se considerar que houve diferença significativa entre os tratamentos. As sementes, quando germinadas em substrato de Sibipiruna com chorume, apresentaram maior massa seca e comprimento de radícula. Com relação à massa fresca, os valores obtidos foram maiores quando o chorume foi adicionado a ambos os substratos. O chorume obtido da decomposição de vegetais aumentou a germinação e o crescimento inicial das plântulas.</p><p align="center"><strong><em>Emergence and growth of lettuce (</em></strong><em>Lactuca sativa<strong> </strong>L.<strong>) submitted to organic substrates</strong></em></p><pre><strong>Abstract: </strong>Organic agriculture stands out as a mode of production consisting of a sustainable system. One of the challenges of this method of cultivation is the production of sufficient quality food in sufficient quantities without compromising the environment. The objective of this study was to analyze the effect of organic substrates on germination and initial lettuce growth. The experiment was conducted in a completely randomized design with four treatments (substrates) and two replicates. The substrates were tested: Sibipiruna compound, commercial substrate, Sibipiruna compound with slurry and commercial slurry substrate. The manure was obtained exclusively from the decomposition of vegetables. The effect of the substrates was evaluated by percentage of germination, fresh mass, dry mass and radicular length. It was possible to consider that there was a significant difference between treatments. The seeds, when germinated in substrate of Sibipiruna with slurry, presented higher dry mass and radicle length. Regarding the fresh mass, the values obtained were higher when the slurry was added to both substrates. The slurry obtained from the decomposition of plants increased the germination and the initial growth of the seedlings.</pre>

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