Growth and quality of mangosteen seedlings (Garcinia mangostana L.) in response to the application of humic acids

Abstract The time of formation of mangosteen seedlings propagated by seeds can be considered as the biggest difficulty in the seedling production system of this species. Considering that the use of humic acids as a growth promoter has been well documented in some species, the objective of this work was to evaluate the growth of mangosteen seedlings in response to the application of humic acid (HA) doses extracted from vermicompost (0; 2; 20; 40; 200 mg C L-1). Growth rate was determined using the following variables: stem diameter, plant height, number of leaves, leaf area, stem dry matter, leaf dry matter, shoot dry matter, root dry matter, total dry matter and Dickson quality index . The dose 150 mg C L-1 was the one that approached the maximum values and therefore should be recommended for the production of seedlings. The results at 240 days after planting (DAP) showed that the HA increased the growth of mangosteen seedlings, helping to reduce the time of seedling formation under conditions for permanent planting.

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QUALITY OF CAMBUCI PEPPER SEEDLINGS IN RESPONSE TO THE APPLICATION OF NUTRIENT SOLUTIONS

JOURNAL OF NEOTROPICAL AGRICULTURE ◽

10.32404/rean.v7i4.4880 ◽

2020 ◽

Vol 7 (4) ◽

pp. 73-79

Author(s):

Nicholas Taborda Nordi ◽

Eduardo Santana Aires ◽

Thatiane Nepomuceno Alves ◽

Samara Moreira Perisato ◽

Antonio Ismael Inácio Cardoso

Keyword(s):

Quality Index ◽

Dry Matter ◽

Stem Diameter ◽

Control Treatment ◽

Final Performance ◽

Randomized Design ◽

Number Of Leaves ◽

Nutrient Solutions ◽

Dickson Quality Index

One of the main stages in the production system of a crop is the production of quality seedlings since it influences the plants' final performance in the field and their production. The study aimed to evaluate different nutrient solutions in the production of Cambuci pepper seedlings. The design used was a complete randomized design, with six treatments corresponding to the nutrient solutions proposed for the pepper crop by Castellane and Araújo, Claudio Roberto, Hoagland, and Arnon, besides the commercial products Plenan® and Biobokashi®, and a control treatment without fertilization, with six replications. The final evaluation was carried out 45 days after sowing. The following variables were analyzed: stem diameter, plant height, leaf dry matter, shoot dry matter, the number of leaves, relative chlorophyll index ("Spad"), and Dickson quality index. The seedlings subjected to the applications of Claudio Roberto and Hoagland and Arnon solutions have the highest heights and number of leaves, the largest stem diameter, shoot dry matter, leaf area, and Dickson quality index with 2.60 and 2.51 mm, 0.54 and 0.62 g, 38.64 and 41.91 cm2, and 0.107; 0.097, respectively. The Hoagland and Arnon nutrient solution provided the best characteristics to produce Cambuci pepper seedlings.

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QUALITY OF CUCUMBER SEEDLINGS GROWN IN DIFFERENT CONTAINERS

JOURNAL OF NEOTROPICAL AGRICULTURE ◽

10.32404/rean.v3i1.820 ◽

2016 ◽

Vol 3 (1) ◽

pp. 33-38

Author(s):

Bruna Finotii Fonseca Reis de Mello ◽

Mateus Vieira Trevisan ◽

Fábio Steiner

Keyword(s):

Quality Index ◽

Dry Matter ◽

Vegetable Production ◽

High Quality ◽

Cucumis Sativus L ◽

Cucumber Seedlings ◽

Key Factor ◽

Design Characteristics ◽

Dickson Quality Index

The use of high quality seedlings is a key factor for the success of vegetable production, and the container size and design characteristics of the containers are important determinants of seedling quality. A experiment was conducted to investigate the effects of different container types on quality of cucumber seedlings (Cucumis sativus L., cv. Aodai Melhorado). Seedlings were grown in a seedling nursery with shadow protection at 50% in different containers: (i) 128-cell trays; (ii) 64-cell trays; (iii) tubes of 120 cm3; and (iv) plastic cups of 180 cm3. The plant height, diameter, root length, shoot dry matter, root dry matter, sturdiness quotient (SQ), shoot:root dry matter ratio (SRR) and Dickson quality index (DQI) were measured at 21st days after sowing. The production of cucumber seedlings in 64-cell trays, polypropylene tubes of 120 cm3 and plastic cups of 180 cm3 resulted in the highest values for the majority of investigated traits. The tray of 128-cells results in lower quality cucumber seedlings compared to other containers. Tubes with volume of 120 cm3 and plastic cups with volume of 180 cm3 are more appropriate containers for the production of high quality cucumber seedlings. The DQI is a good indicator of the standard of quality of cucumber seedlings.

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EFFECT OF PHOSPHATE FERTILIZATION AND BASE SATURATION OF SUBSTRATE ON THE SEEDLINGS GROWTH AND QUALITY OF Plathymenia foliolosa Benth.

Revista Árvore ◽

10.1590/1806-90882017000100011 ◽

2017 ◽

Vol 41 (1) ◽

Cited By ~ 1

Author(s):

Eliane Cristina Sampaio de Freitas ◽

Haroldo Nogueira de Paiva ◽

Helio Garcia Leite ◽

Sílvio Nolasco de Oliveira Neto

Keyword(s):

Factorial Design ◽

Quality Index ◽

Aerial Part ◽

Dry Matter ◽

Base Saturation ◽

Phosphate Fertilization ◽

Neck Diameter ◽

Dickson Quality Index

ABSTRACT This study aimed to evaluate the growth and quality of seedlings of Plathymenia foliolosa Benth in response to base saturation of substrate and phosphate fertilization. The treatments were arranged in a factorial design of 6 P levels (0, 120, 240, 360, 480 and 600 mg dm-3) by 5 base saturation levels (3.5, 25, 40, 55, 70 %), in randomized blocks with four replications. The height of aerial part, neck diameter, shoot dry matter, root dry matter and total dry matter were determined at 118 days after the transplanting. It was still calculated the relation shoot dry matter/root dry matter and the Dickson Quality Index. There were significant effects of the phosphate fertilization for all studied variables. The base saturation had influence on all studied variables, except for the shoot dry matter/root dry matter relation. No significant effect of the interaction between base saturation of substrate and phosphate fertilization was observed on seedlings growth and quality. For the studied conditions, it is recommended 300 mg dm-3 of P for the production of quality seedlings of Plathymenia foliolosa without the necessity of liming.

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Use of substrates and hydrogel to produce desert rose seedlings

Ornamental Horticulture ◽

10.1590/2447-536x.v25i4.2004 ◽

2019 ◽

Vol 25 (4) ◽

pp. 336-344

Author(s):

João Luiz Lopes Monteiro Neto ◽

Wellington Farias Araújo ◽

Sonicley da Silva Maia ◽

Iasmin Kele Amancio Costa da Silva ◽

Edvan Alves Chagas ◽

...

Keyword(s):

Rice Husk ◽

Root Length ◽

Quality Index ◽

Aerial Part ◽

Cattle Manure ◽

Seedling Production ◽

Number Of Leaves ◽

Collar Diameter ◽

The One ◽

Growth Of Seedlings

Abstract Adenium obesum (Forssk.) Roem. & Schult., widely known as desert rose, has attracted interest for its esthetic characteristics, which are influenced by the process of seedling production. Using two consecutive experiments installed fully at random, the study aimed at assessing the use of different substrates and hydrogel to produce desert rose seedlings in a protected environment. First, eleven substrates were tested, prepared as follows: OrganoAmazon®; PuroHumus®; soil; rice husk in natura; carbonized rice husk, sawdust and cattle manure. Then, three substrates were tested (S1 - OrganoAmazon® + PuroHumus®; S2 - OrganoAmazon® + PuroHumus® + rice husk in natura and S3 - OrganoAmazon® + PuroHumus® + carbonized rice husk) associated to four hydrogel levels: 0 (daily irrigation), 1, 2 and 3 g L−1 (irrigated on alternate days). Growth variables and quality index of seedlings were assessed. Six substrates (all of them without addition of sawdust and where used in mix) were grouped as those the promoted appropriate growth of seedlings, with height, number of leaves, collar diameter, root length and aerial part biomass superior to 6.5 cm; 13; 12 mm; 7.5 cm and 0.45 g, respectively. The substrate composed of OrganoAmazon® + PuroHumus® (1:1 v/v), when irrigated daily, was the one that favored most the production of quality seedlings. The use of hydrogel in substrates with shifts of irrigation on alternate days did not favor the production of desert rose seedlings.

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Substrate and quality mangosteen seedlings

Revista Brasileira de Fruticultura ◽

10.1590/0100-29452019135 ◽

2019 ◽

Vol 41 (3) ◽

Author(s):

Gedeon Almeida Gomes Júnior ◽

Rafaela Alves Pereira ◽

Danillo José dos Santos ◽

George Andrade Sodré ◽

Eduardo Gross

Keyword(s):

Growth Rate ◽

Quality Index ◽

Principal Component ◽

Dry Mass ◽

Seedling Production ◽

Coconut Fiber ◽

Garcinia Mangostana ◽

Leaf Dry Mass ◽

Response Groups ◽

Dickson Quality Index

Abstract An obstacle to the production of mangosteen seedlings (Garcinia mangostana L.) is the long nursery time of approximately two years. Among other factors, the identification of a suitable substrate for seedling production from this species is a preponderant factor to reduce nursery time. This study aimed to evaluate the growth of seminal mangosteen seedlings grown in four different substrate compositions. Growth rate was determined using the following variables: stem diameter, plant height, stem dry mass, leaf dry mass, shoot dry mass, root dry mass, total dry mass and Dickson Quality Index (DQI). The substrate S1 (sphagnum turf and vermiculite) was superior to substrates S2 (pinus bark and vermiculite), S3 (pinus bark and coconut fiber) and S4 (soil) in all evaluated parameters. The principal component analysis separated the treatments into three response groups, in which S1 exerted the greatest influence on the growth variables, concluding that this one of the substrates tested was the most adequate for the formation of mangosteen seedlings.

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Initial Growth of Physalis peruviana L. Seedlings on Different Substrates

International Journal of Plant & Soil Science ◽

10.9734/ijpss/2020/v32i830310 ◽

2020 ◽

pp. 1-7

Author(s):

Jeniffer Ribeiro de Oliveira ◽

Mayara Nascimento Santos ◽

Joabe Martins de Souza ◽

Vinícius de Souza Oliveira ◽

Mariana Alexandre Alves Amourim

Keyword(s):

Quality Index ◽

Aerial Part ◽

Dry Matter ◽

Initial Growth ◽

Fresh Matter ◽

Physalis Peruviana ◽

Seedling Root ◽

Number Of Leaves ◽

Mean Time ◽

Dickson Quality Index

The substrate is one of the most important factors in the formation of the seedling and must present conditions suitable for germination and development of the seedling root system. The objective of this work was to evaluate the effect of different substrates on the initial growth of Physalis peruviana L. seedlings. The experiment was conducted at the Experimental Farm, of the Federal University of Espírito Santo– São Mateus (Brazil). The experimental design used was completely randomized, with three treatments (Soil, Provaso® and Bioplant®), seven replications and seven plants per plot, using seeds with 427 days of storage. At 56 days after sowing, the 10 most vigorous seedlings were selected for evaluation. The following characteristics were evaluated: percentage of emergence, emergence speed index (ESI), mean time of emergence (MET), number of leaves (NL), stem diameter (SD), aerial part length (APL), aerial part fresh matter (APFM), aerial part dry matter (APDM), root fresh matter (RFM), root dry matter (RDM) and Dickson quality index (DQI). The Provaso® substrate showed the best performance in all studied variables, being recommended for the production of Physalis seedlings.

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Comparison of Methodologies to Determine the Optimum Plot Size for Okra Seedlings Evaluation

Journal of Agricultural Science ◽

10.5539/jas.v11n5p388 ◽

2019 ◽

Vol 11 (5) ◽

pp. 388

Author(s):

Karina Tiemi Hassuda dos Karina Tiemi Hassuda dos Santos ◽

Maria Luiza Pereira Barbosa Pinto ◽

Camila Pinto de Almeida ◽

Adriano Alves Fernandes ◽

Vinicius de Souza Oliveira ◽

...

Keyword(s):

Quality Index ◽

Dry Matter ◽

Optimum Size ◽

Plot Size ◽

Maximum Curvature ◽

Bootstrap Simulation ◽

Significant Difference ◽

Experimental Errors ◽

Dickson Quality Index

The production of okra using seedlings is a practice increasingly used by farmers. However, this system still lacks further research involving substrates, tray types, cell volume, pest control and disease. For this it is important to determine the optimum size of the plots, in order to reduce the experimental errors and the expenses with the experiment. The objective of this work was to determine the optimum plot size for experiments involving okra seedlings produced in Styrofoam trays of 128 cells using different methods. The methods were the maximum curvature, the maximum curvature with bootstrap simulation and the maximum curvature of the coefficient of variation. The evaluated characteristics were aerial part height, stem diameter, aerial dry matter, root dry matter, total dry matter and quality of seedlings as measured by Dickson quality index. The results showed that the optimum plot size is different between the evaluated characteristics and for characteristics there is no significant difference in the optimum plot size between the three different methods. The optimum size for evaluating okra seedlings produced in Styrofoam trays of 128 cells is 10 seedlings per plot and is indicated the use of the maximum curvature method using a bootstrap simulation.

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Nitrogen fertilization in the production of seedlings of Talisia esculenta (A. St. Hil) Radlk

Revista Brasileira de Engenharia Agrícola e Ambiental ◽

10.1590/1807-1929/agriambi.v21n7p443-447 ◽

2017 ◽

Vol 21 (7) ◽

pp. 443-447 ◽

Cited By ~ 1

Author(s):

Mauro da S. Tosta ◽

João P. N. de Almeida ◽

Glêidson B. de Góes ◽

Priscilla de A. Freire ◽

Vander Mendonça

Keyword(s):

Experimental Design ◽

Nitrogen Fertilization ◽

Quality Index ◽

Dry Matter ◽

Shoot Length ◽

Stem Diameter ◽

N Source ◽

Number Of Leaves ◽

Non Destructive ◽

Dickson Quality Index

ABSTRACT ‘Pitombeira’ does not have organized cultivation, thus requiring information related to the production of seedlings, particularly in relation to chemical fertilizer. In this context, an experiment was conducted in order to define the best dose of nitrogen (N), using urea as N source, to be applied in ‘pitombeira’ seedlings. The experimental design was complete randomized blocks with four replicates and ten plants per plot, testing five N doses (0, 400, 800, 1.600 and 3.200 mg dm-3). Data were submitted to analysis of variance and regression. The non-destructive measurements (number of leaves, stem diameter, shoot length and the ratio between shoot length and stem diameter) were evaluated at 30, 60, 90 and 120 days after transplanting (DAT). In addition, shoot, root and total dry matter and Dickson quality index were determined at 120 DAT. Nitrogen fertilizations, from the dose of 500 mg N dm-3 as top-dressing, were those that led to the most vigorous ‘pitombeira’ plants, while plants developed with dose above 1.600 mg of N dm-3 showed a reduction in their vigor.

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Correlations between growth variables and the Dickson quality index in forest seedlings

CERNE ◽

10.1590/s0104-77602010000400005 ◽

2010 ◽

Vol 16 (4) ◽

pp. 457-464 ◽

Cited By ~ 26

Author(s):

Alexandre Francisco Binotto ◽

Alessandro Dal' Col Lúcio ◽

Sidinei José Lopes

Keyword(s):

Quality Index ◽

Dry Matter ◽

Seedling Emergence ◽

Pinus Elliottii ◽

Seedling Quality ◽

Base Diameter ◽

Shoot Height ◽

Stem Base ◽

Number Of Leaves ◽

Dickson Quality Index

This study aims to identify correlations between growth variables and the Dickson quality index in seedlings of Eucalyptus grandis and Pinus elliottii var. elliottii. The experiment was conducted in a greenhouse and the following variables were observed: stem base diameter, shoot height, number of leaves, leaf dry matter, stem base dry matter, root dry matter, shoot dry matter, total dry matter, ratio of shoot dry matter to root dry matter and ratio of shoot height to stem base diameter in E. grandis 60, 75, 90, 105 and 120 days after seedling emergence, and in P. elliottii 25, 50, 75, 100, 125, 150 and 175 days after seedling emergence. Using Pearson correlation and also path and regression analyses, correlations were analyzed between observed variables according to day after emergence and the Dickson quality index. Stem base diameter was found to have stronger correlation with days after emergence in comparison to shoot height, in both species. Root dry matter was found to have stronger correlation with the Dickson quality index. Stem base diameter was the most suitable parameter to indicate seedling quality due to its higher correlation level with the Dickson quality index. Shoot height was only effective to indicate seedling quality if analyzed together with stem base diameter. Variables relating to dry matter showed the highest correlations with the Dickson quality index (DQI), followed by stem base diameter. Conversely, number of leaves showed the poorest correlations with DQI, followed by seedling height.

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Effect of Salinity and Potassium on Phytomass and Quality of Guava Rootstocks

Journal of Agricultural Science ◽

10.5539/jas.v10n2p308 ◽

2018 ◽

Vol 10 (2) ◽

pp. 308

Author(s):

Benedito F. Bonifácio ◽

Reginaldo G. Nobre ◽

Hans R. Gheyi ◽

Geovani S. De Lima ◽

Leandro De P. Souza ◽

...

Keyword(s):

Electrical Conductivity ◽

Irrigation Water ◽

Quality Index ◽

Dry Matter ◽

Competitive Inhibition ◽

Sandy Loam ◽

Dry Matter Accumulation ◽

Potassium Fertilization ◽

Dickson Quality Index

Potassium fertilization is one of the main techniques that has been studied to mitigateeffects of salt stress in plants, probably because potassium reduces the toxic effect of sodium by competitive inhibition and provides greater tolerance to genotypes of plants to salinity. Hence, this study aimed to evaluate the effect of different salinities of irrigation water in the formation of phytomass and quality of rootstocks of guava cv. Paluma, fertilized with increasing doses of potassium, in an experiment conducted using eutrophic Fluvic Neosol with sandy loam texture under greenhouse conditions, in the municipality of Pombal-PB, Brazil. The experimental design was randomized blocks in 5 × 4 factorial scheme, and the treatments resulted from the combination of five levels of irrigation water electrical conductivity (ECw = 0.3; 1.1; 1.9; 2.7 and 3.5 dS m-1) and four K doses (70, 100, 130 and 160% of K), in which the dose of 100% K corresponded to 726 mg of K dm-3 of substrate, with four replicates and two plants evaluated in each plot. Irrigation with water salinity from 0.3 dS m-1 compromises the total dry matter accumulation and the Dickson quality index of guava rootstocks cv. Paluma at 225 days after emergence (DAE), independent of potassium fertilization. Fertilization with different potassium doses did not promote differences in phytomasses and quality of rootstocks. There was no significant effect of interaction (salt × doses of K) on the studied variables.

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