scholarly journals Agroindustrial residue of carnauba as substrate alternative for seedling production of watermelon

2020 ◽  
Vol 14 (1) ◽  
pp. 17
Author(s):  
G. C. Silva ◽  
F. N. Lima ◽  
R. F. Vogado ◽  
E. M. Santos ◽  
F. N. Lima ◽  
...  
Keyword(s):  
Leaf Area ◽  
Average Length ◽  
Citrullus Lanatus ◽  
Block Design ◽  
Dry Mass ◽  
Root Density ◽  
Production Costs ◽  
Seedling Production ◽  
Root Area ◽  
Agroindustrial Residue

Substrates is an important pillar of seedling production, when it seeks to establish vigorous plants with a uniform pattern and lower possible production costs. The objective of this work was to evaluate the use of the carnauba agroindustrial residue (RC) in the alternative substrate composition for the formation of watermelon seedlings. The experiment was conducted at the Campus Professor Cinobelina Elvas, Federal University of Piauí, Bom Jesus, Piauí. A randomized block design with five treatments was used: RC and sand, in the proportions: 20/80, 40/60, 60/40, 80/20 and 100/0, with four replications and eight plants per plot, 160 plants. The variables evaluated were: emergence percentage, emergence speed index, plant height, leaf area, leaf number, shoot dry mass, neck diameter, root density, root area, root mean length and root dry mass. The seedlings with 100% RC provided higher height (4.43 cm), leaf area (16.13 cm2), number of leaves (2.0) and shoot dry mass (0.13 g / plant). The use of 80% CR and 20% sand resulted in a larger diameter of the neck (mean), root area (mean) and root mean (average) length. Already in the proportions of 60 and 40% of CR plus sand respectively, they promoted higher root density (mean). However, to produce seedlings of Citrullus lanatus with adequate quality standard, it is recommended to use 100% RC substrate because it is more responsive to aerial part and substrate with 80% RC / 20% sand, which promotes greater growth of the system root.

scholarly journals Nitrogen and potassium supply and the morphogenic and productive characteristics of marandu palisadegrass

2010 ◽  
Vol 39 (8) ◽  
pp. 1666-1675 ◽  
Author(s):  
Marcio Mahmoud Megda ◽  
Francisco Antonio Monteiro
Keyword(s):  
Leaf Area ◽  
Dry Matter ◽  
System Development ◽  
Block Design ◽  
Dry Mass ◽  
Dry Matter Production ◽  
Root System Development ◽  
Randomized Block Design ◽  
Matter Production ◽  
Specific Length

The objective of this work was to study morphogenic characteristics, and dry matter production of roots and shoots of marandu palisadegrass (Brachiaria brizantha cv. Marandu) submitted to combinations of nitrogen and potassium, in a nutritive solution, employing silica as substrate. The experiment was carried out in a greenhouse during the summer. It was used a 5² fractionated factorial scheme with 13 combinations of nitrogen and potassium, which were distributed in a randomized block design, with four replications. The nitrogen × potassium interaction was significant for the number of tillers and leaves, for leaf area, for shoots and root section dry mass, for total length and surface and specific length and surface in the roots. Production of aerial part dry mass positively correlated with the number of tillers and leaves and grass leaf area. Nitrogen rates modulated the root system development, and the root specific length and surface decreased when high rates of nitrogen and potassium were supllied. Nitrogen and potassium influence Marandu palisadegrass morphogenic characteristics, which are determinant for grass dry matter production.

scholarly journals Effects of plant growth regulators in heliconia ‘Red Opal’

2016 ◽  
Vol 22 (3) ◽  
pp. 301
Author(s):  
Ana Cecilia Ribeiro de Castro ◽  
Fernando José Hawerroth ◽  
Carlos Alberto Kenji Taniguchi ◽  
Tiago Freitas Silva ◽  
Nazaré Suziane Soares
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Growth Regulators ◽  
Growth Regulator ◽  
Block Design ◽  
Dry Mass ◽  
Potted Plants ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
One Year

The objective of this study was to evaluate growth regulators with purpose of reducing the size of heliconia ‘Red Opal’ potted plants. The experiment was carried out in randomized block design with five treatments (trinexapac-ethyl and paclobutrazol at rates of 37.5 and 75.0 mg of active ingredient per pot and control without growth regulator) and five replicates. The treatments were applied 40 days after planting the rhizomes in pots filled with soil. Thirty and 150 days after the growth regulator application, plant height, number of leaves and shoots, petioles length and leaf area were evaluated. One year after planting the rhizomes in pots the number of inflorescence and leaves (leaves, sheathing leaf bases and inflorescences) and rhizomes (rhizomes and roots) dry mass were determined. Trinexapac-ethyl had no differences compared to the control in any of the variables evaluated. Paclobutrazol proved effective in reducing plant height, leaf area and petiole length and increase in number of leaves and shoots but the effect was temporary. Also, it did not affect the inflorescences production and leaves and rhizomes dry mass. Paclobutrazol is efficient to promote height reduction and to increase the number of shoots in heliconia ‘Red Opal’ potted plants without affect the inflorescence formation but its effects is temporary.

scholarly journals Waste management of pseudostem to increase the growth of banana seedlings

2021 ◽  
Vol 69 (3) ◽  
Author(s):  
Juliana Domingues Lima ◽  
Natália de Souza Bravo ◽  
Danilo Eduardo Rozane ◽  
Edson Suigueaki Nomura ◽  
Silvia Helena Modenese Gorla da Silva ◽  
...  
Keyword(s):  
Dry Matter ◽  
Block Design ◽  
Nutrient Content ◽  
Dry Mass ◽  
Nutritional Composition ◽  
State University ◽  
Paulo State ◽  
Root Area ◽  
Randomized Block Design ◽  
Water Nutrients

Pseudostem is an abundant residue after harvesting of the banana bunch, serving as a source of water, nutrients and organic substances.  The present study aimed to evaluate the effect of pseudostem waste on ‘Nanica’ banana (Musa spp. AAA) cultivar in greenhouse under contrasting environmental conditions.  For this, an experiment was carried out in in the São Paulo State University -UNESP in a randomized block design in a 2 x 2 factorial scheme (presence or absence of waste and two seasons), consisting of four replicates of three experimental plots with two pots per plant.  One season was early November/2018 (Summer) and the other half of May/2019 (Winter).  A 40 cm portion of the pseudostem collected from of a freshly harvested plant was sectioned into 10 cm portions and placed under the substrate of the seedling-containing pot at both times.  Periodically, height, pseudostem diameter and leaf emission were evaluated.  After the release of leachate by the residue, plants were taken to the laboratory, and the area of leaves and roots, their respective masses, and the leaf nutrient content were determined.  The nutritional composition of the residue was evaluated before being applied for both seasons.  In summer, accumulated dry matter in the different organs, leaf area and root area was higher in the presence of the residue, while in winter, only root dry mass was higher (P < 0.01).  The application of residue had a consistent effect on root growth, which can be exploited in the field.

scholarly journals Allometry and morphophysiology of papaya seedlings in a substrate with polymer under irrigation with saline water

2020 ◽  
Vol 11 ◽  
pp. e3339
Author(s):  
EXPEDITO CAVALCANTE NASCIMENTO NETO ◽  
Francisco Thiago Coelho Bezerra ◽  
Marlene Alexandrina Ferreira Bezerra ◽  
Walter Esfrain Pereira ◽  
Lourival Ferreira Cavalcante ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Leaf Area ◽  
Irrigation Water ◽  
Saline Water ◽  
Block Design ◽  
Dry Mass ◽  
Area Ratio ◽  
Irrigation Frequency ◽  
Randomized Block Design ◽  
Blade Area

The availability and quality of the irrigation water are among the limitations for the development of agriculture in the semiarid. Aiming at gathering information on these limitations, this work aimed to evaluate the association between a water-absorbing polymer and water salinity in irrigation frequencies, as well as container volumes on the allometric and morphophysiological indices of seedlings of the papaya (Carica papaya) cultivar ‘Sunrise Solo’. The treatments were obtained from the combination between the water-absorbing polymer (0.0; 0.2; 0.6; 1.0, and; 1.2 g dm-3), the electrical conductivity of the irrigation water (0.3; 1.1; 2.7; 4.3, and; 5.0 dS m-1), and irrigation frequencies (daily and alternate), plus two additional treatments (0.75 and 1.30 dm3) to study the effects of the container volume, distributed in a randomized block design. At 55 days after sowing, the following characteristics were evaluated: ratio between stem height and diameter; ratio between shoot and root dry matter; root density; leaf blade area; ratio between total leaf area and root dry mass; specific leaf area; leaf area ratio; leaf mass ratio; and Dickson quality index. The allometric and morphophysiological indices were damaged by the increase of water electrical conductivity and favored by the application of the polymer and a higher irrigation frequency. In the production of papaya seedlings, a daily irrigation frequency must be prioritized, using containers of 0.75 or 1.30 dm-3, water with electrical conductivity up to 2.6 and 1.9 dS m-1 when irrigated daily or in alternate days, respectively, and 0.6 g dm-3 of polymer.

scholarly journals The production of Physalis spp. seedlings grown under different-colored shade nets

2016 ◽  
Vol 38 (2) ◽  
pp. 257 ◽  
Author(s):  
Daniel Fernandes da Silva ◽  
Rafael Pio ◽  
Joyce Dória Rodrigues Soares ◽  
Paulyene Vieira Nogueira ◽  
Pedro Maranha Peche ◽  
...  
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Block Design ◽  
Dry Mass ◽  
Additional Treatment ◽  
Light Spectrum ◽  
Treatment Control ◽  
Area Index ◽  
Randomized Block Design ◽  
Number Of Leaves

The objective of this study was to evaluate the production of seedlings of Physalis L. species under different-colored shade nets. Four shade nets individually stained white, blue, red and black, all with 50% shading, were used in this study, and an additional  treatment (control) was used in which seedlings were grown in full sun. The study examined four species of Physalis, namely, P. peruviana, P. pubescens, P. minima and P. ixocarpa. The experiment followed a randomized block design with three blocks and 25 seeds per plot. The species were sown in styrofoam trays. Germination was monitored daily to calculate the Emergency Velocity Index (EVI) and stabilize the overall percentage of emergence. Height, stem diameter, number of leaves, leaf area index and dry mass of seedlings were assessed at 50 days after sowing. The study found that these species react differently to changes in the light spectrum. Seedlings of P. peruviana should be grown under a white or red shade net; of P. pubescens under a white or black shade net; of P. minima under a white, red or black shade net; and of P. ixocarpa under a white shade net. For all species, 50% shade should be used. 

scholarly journals Production of jacaranda plantlets by minicutting

2020 ◽  
pp. 1951-1962
Author(s):  
Mariana Fauerharmel ◽  
Dilson Antônio Bisognin ◽  
Kelen Haygert Lencina ◽  
Thaíse da Silva Tonetto ◽  
Jonas Marcelo Meltzer ◽  
...  
Keyword(s):  
Leaf Area ◽  
Nutrient Solution ◽  
Adventitious Rooting ◽  
Dry Mass ◽  
Mass Ratio ◽  
Indolebutyric Acid ◽  
Full Sunlight ◽  
Root Area ◽  
Jacaranda Mimosifolia

The objective of this study was to investigate the production of jacaranda (Jacaranda mimosifolia D. Don) plantlets by minicutting. For this, a mini-clonal hedge was established to supply sprouts for minicuttings. For adventitious rooting, the minicuttings were treated with hydroalcoholic solution of indolebutyric acid at concentrations of 0, 1000, and 2000 mg L-1 and grown in a greenhouse. The survival of minicuttings was evaluated at 30, 60, and 90 days, and rooting, callus, sprouting, leaf area, root area, aerial dry mass, root dry mass, total dry mass, and aerial/root dry mass ratio were assessed at 90 days. The rooted minicuttings were treated with different volumes of nutrient solution (0, 25, and 50 mL) and were evaluated for survival, height, diameter, leaf area, root area, aerial dry mass, root dry mass, and aerial/root dry mass ratio of the plantlets after 30 days of cultivation in a shade house and full sunlight. Jacaranda can be established in a mini-clonal hedge for the production of shoots necessary for the preparation of minicuttings. The minicuttings are rooted in a greenhouse without use of indolebutyric acid. The plantlets produced can be acclimatized in a shade house and rustified in full sun. Jacaranda plantlets can be produced by minicuttings.

scholarly journals Biostimulant and Micronutrient Applications in the Production of Acacia mangium Seedlings

2019 ◽  
pp. 1-11
Author(s):  
Nathália Ferreira Alves ◽  
Sebastião Ferreira de Lima ◽  
Ana Paula Leite de Lima ◽  
Catia Aparecida Simon ◽  
Pedro Paulo Virgilio Damis
Keyword(s):  
Leaf Area ◽  
Plant Height ◽  
Quality Index ◽  
Block Design ◽  
Acacia Mangium ◽  
Dry Mass ◽  
Diameter Ratio ◽  
Mato Grosso ◽  
Randomized Complete Block Design ◽  
Mato Grosso Do Sul

Aims: Evaluate the effects of applying biostimulant and micronutrients on Acacia mangium Willd seedlings. Study Design: A randomized complete block design was used in a 2x5 factorial scheme, with four replications. Place and Duration of Study: The experiment was conducted at the Universidade Federal de Mato Grosso do Sul, at the Chapadão do Sul Campus, MS, with the geographical coordinates 18º46’ 44” S and 52º36’ 49” W, in a nursery area from October 2015 to January 2016. Methodology: The treatments consisted of a combination of the presence or absence of a solution containing micronutrients and five doses of biostimulant (0, 7.5, 15.0, 22.5, and 30.0 mL per L of water). The commercial product Stimulate™ was used as the biostimulant, and the micronutrient solution was prepared at the concentration of 1.0%. The micronutrients in the solution were in the following formulations: ZnS04, H3BO3 and CuS04. The seeds were sown in tubes containing the commercial substrate Carolina Soil do Brasil, together with the use of Osmocote Plus™ fertilizer. Results: The use of biostimulant associated with micronutrients favored the rate of emergency speed. The doses of 24.8, 14.0 and 26.1 mL L-1 of biostimulant water provided the highest values for leaf area, plant height and total dry mass, respectively, when associated with the use of micronutrients. The height / diameter ratio decreased with increasing doses of biostimulant, while the Dicson quality index increased in the same condition. Conclusion: The use of micronutrients and biostimulants were favourable for the production of A. mangium seedlings. Only the height/diameter ratio (HDR) reduced for all biostimulant doses.

scholarly journals Efeito da adubação nitrogenada na formação de mudas de goiabeira irrigadas com águas salinizadas

2015 ◽  
Vol 10 (4) ◽  
pp. 42 ◽  
Author(s):  
E. M. Silva ◽  
R. G. Nobre ◽  
L. P. Souza ◽  
F. W. A. Pinheiro ◽  
A. B. A. Andrade
Keyword(s):  
Electrical Conductivity ◽  
Leaf Area ◽  
Plant Height ◽  
Irrigation Water ◽  
Nitrogen Fertilization ◽  
Block Design ◽  
Dry Mass ◽  
Experimental Unit ◽  
Randomized Block Design ◽  
Irrigation Water Salinity

<p>Além de favorecer o desenvolvimento e a produção das culturas, a adubação tem sido considerada uma técnica capaz de reduzir o efeito da salinidade nas plantas. Neste sentido, desenvolveu-se o trabalho<strong> </strong>para avaliar a influência de doses de nitrogênio na formação de mudas de goiabeira cv. Paluma irrigadas com águas de diferentes salinidades. O experimento foi desenvolvido em casa de vegetação do Centro de Ciências e Tecnologia Agroalimetar da UFCG, Pombal, PB com delineamento experimental em blocos casualizados, em esquema fatorial 5 x 4, sendo os tratamentos correspondentes aos níveis de condutividade elétrica da água (CEa) de 0,3; 1,1; 1,9; 2,7 e 3,5 dS m<sup>-1</sup> associados a 70, 100, 130 e 160% da dose recomendada de nitrogênio (N) para mudas de goiabeira cv. Paluma, com quatro repetições, e cinco plantas por unidade experimental. Aos 180 dias após a emergência, a adubação nitrogenada na dose de 773 mg de N dm<sup>-3</sup> reduz o efeito da salinidade da água de irrigação sobre o diâmetro do caule das mudas. As plantas adubadas com as doses variando de 541 a 618,4 mg de N dm<sup>-3</sup> atingem maior crescimento em altura de planta, número de folhas e área foliar. A área foliar e a massa seca total de mudas de goiabeira atingem maiores valores no nível de CEa de 1,3 dS m<sup>-1</sup>.</p><p align="center"><strong>Effect of nitrogen fertilization in the formation of guava seedlings irrigated with salted water</strong></p><p><strong>Abstract</strong><strong>: </strong>In addition to favoring the development and production of crops, the fertilizer has been considered a technique capable to reduce the effect of salinity on plants. The experiment was conducted in a greenhouse of the ‘Centro de Ciências e Tecnologia Agroalimentar’ of UFCG, Pombal, PB in a randomized block design a 5 x 4 factorial, with the treatments corresponding to the electrical conductivity of irrigation water (ECw) 0.3; 1.1; 1.9; 2.7 and 3.5 dS m<sup>-1</sup> associated with doses of 70, 100, 130 and 160% of recommended nitrogen (N) for guava seedlings Paluma,  with four replications, using five plants per experimental unit. At 180 days after emergence, the nitrogen fertilization at a dose of 773 mg N dm<sup>-3</sup> reduces the effect of irrigation water salinity on the stem diameter of seedlings. The plants fertilized with doses ranging from 541 at 618.4 mg of the N dm<sup>-3</sup> reach higher growth in plant height, leaf number and leaf area. The leaf area and total dry mass of guava seedlings reach higher values at the ECw level of 1.3 dS m<sup>-1</sup>.</p>

scholarly journals N:K RATIO FOR PHENOLOGICAL GROWTH STAGES OF NET MELON CULTIVATED IN NFT HYDROPONIC SYSTEM1

2020 ◽  
Vol 33 (1) ◽  
pp. 108-115
Author(s):  
CAMILA SENO NASCIMENTO ◽  
CAROLINA SENO NASCIMENTO ◽  
ARTHUR BERNARDES CECÍLIO FILHO
Keyword(s):  
Leaf Area ◽  
Growth And Development ◽  
Block Design ◽  
Dry Mass ◽  
Reproductive Stage ◽  
Vegetative Stage ◽  
Growth Stages ◽  
Second Stage ◽  
Randomized Block Design ◽  
Number Of Leaves

ABSTRACT The adequate ratio in the supply of nitrogen (N) and potassium (K) for each phenological growth stage of melon is fundamental for its growth and development with the maximization of the dry mass partition between the vegetative and reproductive parts. The objective of this study was to evaluate the influence of N and K concentrations in two phenological growth stages (vegetative and reproductive stage) of melon and obtain the best N:K ratio for each one. In the first stage, four concentrations of N (8, 11, 14 and 17 mmol L-1) and two concentrations of K (4 and 5 mmol L-1) were evaluated in a randomized block design in a 4 × 2 factorial scheme with five replicates. In the second stage, in a 2 × 2 factorial scheme, the combinations of the two concentrations of N that generated the best characteristics in the previous stage and two concentrations of K (4.5 and 9.0 mmol L-1) were evaluated. The increase of the N concentration in the vegetative stage promoted the increase of the N, P and S content of leaves and the reduction of K, Ca and Mg. Moreover, it increased the number of leaves, the height of the plant (vertically tutored) and the leaf area. Therefore, 17:5 mmol L-1 was considered as the best N:K ratio for the vegetative stage. In the second stage, there was no effect of N and K concentrations on leaf area, yield and fruit quality. So, 14:4.5 mmol L-1 was considered as the best N:K ratio for the reproductive stage.

scholarly journals Growth and yield of 'Amarante' garlic accessions

Revista CERES ◽  
2018 ◽  
Vol 65 (6) ◽  
pp. 481-490
Author(s):  
Nelson Licínio Campos de Oliveira ◽  
Mário Puiatti ◽  
Fernando Luis Finger ◽  
Paulo Cezar Rezende Fontes ◽  
Paulo Roberto Cecon ◽  
...  
Keyword(s):  
Leaf Area ◽  
Harvest Index ◽  
Pearson Correlation ◽  
Block Design ◽  
Total Yield ◽  
Morphological Characteristics ◽  
Dry Mass ◽  
Growth And Yield ◽  
Leaf Area Duration ◽  
Bulb Yield

ABSTRACT Although it is an important vegetable used as a culinary ingredient around the world, there is little information on the characterization of growth and productivity of garlic cv. 'Amarante'. The objective of this study was to evaluate the morphophysiological and productive characteristics of 20 accessions of 'Amarante' garlic from the Vegetable Germplasm Bank of the Universidade Federal de Viçosa (BGH/UFV). The experiment was conducted in the field, in a randomized complete block design, with four replications. During the garlic cycle, plants were evaluated for morphological characteristics, green color intensity, growth analysis, harvest index, and bulb productivity. Data were subjected to analysis of variance, and the means were grouped by the Skott-Knott criteria. The Pearson correlation coefficient was estimated between morphophysiological characteristics and bulb yield. The accessions presented different behavior during the evaluations. BGH 7616 stood out for showing the greatest leaf area, harvest index, dry mass of leaves, pseudostem, bulb, and whole plant, resulting in the greatest total and commercial bulb yield. The highest correlations were found between total yield and leaf area duration (r = 0.7263; p ( 0.01) from 87 to 114 days after planting (DAP) and between total yield and leaf area at 87 DAP (r = 0.6442, p < 0.01). Among the evaluated characteristics, the leaf area at 87 DAP and leaf area duration from 87 to 114 DAP were the morphophysiological characteristics that most influenced the bulb yield in 'Amarante' garlic.

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