scholarly journals Seedling production of Coffea arabica from different cultivars in a modified hydroponic system and nursery using different containers

2021 ◽  
Vol 45 ◽  
Author(s):  
Amador Eduardo de Lima ◽  
Rubens José Guimarães ◽  
Samuel Henrique Braga da Cunha ◽  
Elisa de Melo Castro ◽  
Alex Mendonça de Carvalho ◽  
...  

ABSTRACT The development of modified hydroponic cultivation has aroused interest and its use has enabled advantages in several crops, but studies for coffee are still scarce. Thus, the objective of this research was to evaluate seedling production of three Coffea arabica cultivars (Mundo Novo IAC-376-4, Catuaí IAC-62 Amarelo and MGS Paraíso 2), in a modified hydroponic system, and to compare it with the nursery production system, using plastic polyethylene tubettes and bags. Coffee seedlings in the development phase with cotyledon leaves, were cultivated in both cultivation systems. At 90 days after the implementation of the experiment, the seedlings were analyzed for growth (height, stem diameter, total number, leaf area, root area, root and shoot dry matter weight), and physiological characteristics (chlorophyll content and stomatal conductance). For the statistical analysis, a completely randomized design (CRD) was used in a factorial scheme 3 (cultivars) x 2 (containers) x 2 (cultivation systems), with four replications of ten plants per plot. The innovative production system of coffee seedlings in modified hydroponics, in combination with the use of polyethylene bags, provided greater growth of coffee seedlings with better physiological characteristics. Among the cultivars tested, MGS Paraíso 2 stood out with higher seedling growth (number of leaves, stem diameter and root and shoot dry matter weight).

Irriga ◽  
2020 ◽  
Vol 25 (4) ◽  
pp. 764-770
Author(s):  
ANA RAQUEL DE MELO ◽  
JOSÉ FLÁVIO FERREIRA DE SOUSA ◽  
CRISTIANE NUNES CONCEIÇÃO ◽  
MARIA ROSELANE ALVES OLIVEIRA

CONDITIONING OF SEEDLINGS OF PEPPERS (CAPSICUM ANNUM L.), INFLUENCED BY THE HYDROPONIC SYSTEM "FLOATING"     ANA RAQUEL PEREIRA DE MELO 1; JOSÉ FLÁVIO FERREIRA DE SOUSA2; CRISTIANE NUNES DA CONCEIÇÃO 3 E MARIA ROSELANE ALVES OLIVEIRA4   1 Engenheira Agrônoma, Instituto Federal do Maranhão - Campus Codó-MA, Rua do Poraquê S/N Codó Novo, Zona Rural, CEP: 65400000, Codó- MA, Brasil, [email protected]; 2 Engenheiro Agrônomo, Instituto Federal do Maranhão - Campus Codó-MA, Rua do Poraquê S/N Codó Novo, Zona Rural, CEP: 65400000, Codó- MA, Brasil, [email protected]; 3 Engenheira Agrônoma, Instituto Federal do Maranhão - Campus Codó-MA, Rua do Poraquê S/N Codó Novo, Zona Rural, CEP: 65400000, Codó- MA, Brasil, [email protected]; 4 Engenheira Agrônoma, Instituto Federal do Maranhão - Campus Codó-MA, Rua do Poraquê S/N Codó Novo, Zona Rural, CEP: 65400000, Codó- MA, Brasil, [email protected].     1 ABSTRACT   The aim of this research to assess the development of pepper seedlings under different nutritional conditions, under the influence of the "Floating" aiming system, a new production, alternative for larger producers’ safety in producing sustainably, ensuring the production of healthy food and income generation. The production of seedlings occurred in polyethylene plastic trays, where they were placed 2/seeds paprika cells of Yolo Wonder cultivar. After the emergence of seedlings was thinning. The experimental design was completely randomized design, containing 5 treatments with 4 replications. The treatments were T1-trays remained out of the "floating", receiving water irrigation 2 times a day; T2-trays of floating, remained out more irrigation the same solution of the "floating" 3 times a week, using 500 ml of solution per Pan; T3-were pans 12:00 are in "floating" and 12:00 am out; T4-trays remained throughout the period of the test in the "floating"; T5-trays remained throughout the period in the "floating", except in the last week. The solution was composed of soluble fertilizer, calcium nitrate, potassium chloride, Triple Superphosphate and Urea, and was changed every Ten days. The parameters analyzed were height of the plant; Root length; Fresh matter weight of shoot; Weight of fresh root matter; Dry matter weight of shoot; Root dry matter weight; Diameter of the stem. All parameters analyzed were submitted to analysis of variance and averages compared by Tukey test to 1% in the case of significance. The treatment proved to be more feasible was the T4, as this medium to larger variables introduced height, stem diameter, plant fresh mass aerial and aerial dry mass.   Keywords: Nutrient solution, production, safety, productive Alternative.     MELO, A. R. P.; SOUSA, J. F. F.; CONCEIÇÃO, C. N. E OLIVEIRA, M. R. A. CONDICIONAMENTO DE MUDAS DE PIMENTÃO (CAPSICUM ANNUM L.), INFLUENCIADAS PELO SISTEMA HIDROPÔNICO “FLOATING”           2 RESUMO   Objetivou-se com esta pesquisa avaliar o desenvolvimento de mudas de pimentão submetidas a diferentes condicionamentos nutricionais, sobre influência do sistema “Floating” visando, uma nova alternativa de produção, para propiciar aos produtores maior segurança em produzir sustentavelmente, para com isso garantir a produção de alimentos saudáveis e geração de renda. A produção de mudas ocorreu em bandejas de polietileno plástico, onde foram colocadas 2 sementes/célula de pimentão da cultivar Yolo Wonder. Após a emergência das plântulas, foi feito o desbaste. O delineamento experimental foi Inteiramente Casualizado, contendo 5 tratamentos com 4 repetições. Os tratamentos foram: T1- As bandejas permaneceram sempre fora do “floating”, recebendo irrigação de água 2 vezes ao dia; T2 – As bandejas permaneceram fora do floating, mais irrigação da mesma solução do “floating” 3 vezes por semana, usando 500 ml da solução por bandeja; T3 – As bandejas ficaram 24 h em “floating” e 24 h fora; T4 - As bandejas permaneceram todo o período do ensaio no "floating"; T5 - As bandejas permaneceram todo o período no "floating” ", exceto na última semana. A solução foi composta pelos fertilizantes solúveis, Nitrato de Cálcio, Cloreto de potássio, Superfosfato Triplo e Ureia, e foi trocada a cada Dez dias. Os parâmetros analisados foram: Altura da planta; Comprimento da raiz; Peso da matéria fresca da parte aérea; Peso da matéria fresca da raiz; Peso da matéria seca da parte aérea; Peso da matéria seca da raiz; Diâmetro do caule. Todos os parâmetros analisados foram submetidos à análise de variância e as médias comparadas pelo teste de Tukey a 1% no caso de significância. O tratamento que se mostrou mais viável foi o T4, pois este apresentou maiores médias para as variáveis altura da planta, diâmetro caulinar, massa fresca da parte aérea e massa seca da parte aérea.   Palavras-chave: Solução Nutritiva, Alternativa de Produção, Segurança produtiva.


2020 ◽  
Vol 50 (1) ◽  
Author(s):  
Guilherme José Ceccherini ◽  
Tiago José Leme de Lima ◽  
Fernando César Sala

ABSTRACT: Nowadays, an important economic movement is involved in the improvement of polyethylene trays for the production of seedlings, being developed with different volumes, numbers and cell formats in an each culture-specific manner. The objective of the present study was to evaluate the performance of curly lettuce originated from seedlings from trays with different volumes, through the comparison between conventional and hydroponic-NFT cultivation. Five volumes of trays (10, 20, 30, 40 and 50 cm³ of cell-1) were tested in conventional and hydroponic cultivation, from February to March 2016. For the purpose of comparison, the plants were evaluated through the characteristics of height, circumference, stem diameter, number of leaves, fresh shoot mass and productivity. The use of volumes greater than 10 cm³ showed higher precocity in both cultivation systems, with hydroponic cultivation being more precocious and productive when compared to conventional cultivation.


2013 ◽  
Vol 38 (10) ◽  
pp. 1884-1890 ◽  
Author(s):  
Ren-He ZHANG ◽  
Dong-Wei GUO ◽  
Xing-Hua ZHANG ◽  
Hai-Dong LU ◽  
Jian-Chao LIU ◽  
...  

2017 ◽  
Vol 38 (4Supl1) ◽  
pp. 2387
Author(s):  
Santiel Alves Vieira Neto ◽  
Fábio Ribeiro Pires ◽  
João Carlos Madalão ◽  
Douglas Gomes Viana ◽  
Carlos César Evangelista de Menezes ◽  
...  

Given the high costs of agricultural production, especially due to the price of fertilisers, particularly nitrogen, the use of inoculants to supply nitrogen to soybean crops is a widely recommended practice. The objective of this study was to evaluate the feasibility of applying inoculants through seed and planting furrow in soil previously cultivated with soybean and Brazilian native “cerrado” biome soil under greenhouse conditions. Seven treatments were tested: 1) inoculation via seed (inoculant + fungicide + micronutrient), 2) treatment via seed (fungicide + micronutrient), 3) control (only seed), 4) inoculation via furrow-dose 1 (recommended dose), 5) inoculation via furrow-dose 2 (twice the recommended dose), 6) inoculation via furrow-dose 3 (three times the recommended dose) and 7) inoculation via furrow-dose 1 + seed inoculation. We evaluated plant height, fresh and dry matter weight of the aerial part and nodules, number of total, viable and non-viable nodules, number of pods per plant and grain yield. Inoculation was more effective when used in cerrado soil, but soybean performance in treatments without inoculation was higher in previously cultivated soil. Application through furrow proved to be a viable practice due to the similarity of the results obtained with the traditional application by seed.


2017 ◽  
Vol 30 (4) ◽  
pp. 1001-1008
Author(s):  
JOÃO PEDRO ALVES DE AQUINO ◽  
ANTÔNIO AÉCIO DE CARVALHO BEZERRA ◽  
FRANCISCO DE ALCÂNTARA NETO ◽  
CARLOS JOSÉ GONCALVES DE SOUZA LIMA ◽  
RAYLSON RODRIGUES DE SOUSA

ABSTRACT Cowpea is broadly cultivated worldwide, especially in semi-arid or arid regions where soil or irrigation water salt contents can negatively influence the species’ productive capacity. The objective of this study was to evaluate the morphophysiological responses of cowpea genotypes to irrigation water salinity. The experiment was conducted in a greenhouse, under a completely randomized design with nine replications and in a 5x3 factorial scheme. Treatments consisted of five levels of irrigation water electrical conductivity - EC (EC0: 0.55; EC1: 1.60; EC2: 3.20; EC3: 4.80 and EC4: 6.40 dS m-1), applied from the 15th day after sowing (DAS), and three cowpea genotypes (G1: BRS Imponente; G2: MNC04-795F-168 and G3: MNC04-795F-159). EC increases at 35 DAS promoted stem diameter reductions of 8.0% (G1), 11.4% (G2), and 7.7% (G3), indicating different resistance to salinity by each genotype. Leaf area reductions at 25 and 38 DAS were 30.9% and 38.8% for EC0 and EC4, respectively. The BRS Imponente cultivar presented a performance superior to those of G2 and G3 in relation to stem diameter and stem dry matter at 25 DAS, and root-shoot and root-leaf ratios at 38 DAS.


2007 ◽  
Vol 64 (1) ◽  
pp. 23-29
Author(s):  
José Geraldo de Araújo Carneiro ◽  
Deborah Guerra Barroso ◽  
Luis Maurício da Silva Soares

Seedlings compete for nutrients, water and light. The available area for each seedling affects their behavior related to requirements for these resources. This experiment evaluated the influence of five plant densities on the growth of bare root Pinus taeda, L. seedlings in a nursery after outplanting. The analyzed characteristics were: height (H), root collar diameter (D), H/D ratio, and dry matter weight. Higher densities stimulated H growth and the lowest densities increased D average and dry matter weight and lowered the H/D ratio. Seedlings were distributed by H, D and H/D classes. Higher densities had a larger number of seedlings in larger H classes. Larger numbers of seedlings with larger D and lower H/D ratios were found in lower densities. Ten months after outplanting the seedlings grown in lower densities had higher survival percentages and growth. Some saplings of standardized heights were uprooted with the objective of studying their root systems. The lowest densities stimulated higher numbers of first and second order roots as well as fresh and dry matter weights of thin roots with mycorrhizae presence. In both parts of the experiment, the density of 278 seedlings m-2 yielded equivalent averages as compared to the lowest densities.


2005 ◽  
Vol 48 (6) ◽  
pp. 863-871 ◽  
Author(s):  
Amauri Nelson Beutler ◽  
José Frederico Centurion ◽  
Alvaro Pires da Silva

The objective of this study was determine the resistance to penetration (PR), least limiting water range (LLWR) and critical bulk density (Db-crit) for soybean yield in a medium-textured oxisol (Haplustox). The treatments represented the soil compaction by passing a tractor over the site 0, 1, 2, 4, and 6 times, with 4 replications in a randomized experimental design. Samples were collected from 0.02-0.05, 0.07-0.10 and 0.15-0.18 m depths. Soybean (Glycine max cv. Embrapa 48) was sowed in December 2002. Plant height, number of pods, aerial dry matter, weight of 100 seeds, and the yield in 3.6 m² plots were recorded. Soybean yield started reduction at the PR of 0.85 MPa and Db of 1.48 Mg m-3. The LLWR was limited in highest part by water content at field capacity (0.01 MPa tension) and in lowest part by water content at PRcrit, achieved the Db-crit to yield at 1.48 Mg m-3.


2018 ◽  
Vol 36 (0) ◽  
Author(s):  
C. ALVES ◽  
L. GALON ◽  
R.R. KAIZER ◽  
F.L. WINTER ◽  
C.M. HOLZ ◽  
...  

ABSTRACT: The use of plant species for the phytoremediation of soils contaminated with herbicides is an alternative that has been emphasized to minimize the effects of the persistence of agrochemicals in the environment. The objective of this study was to evaluate the tolerance potential of winter species in soils contaminated with sulfentrazone and fomesafen. The experiment was in a completely randomized design with four replications. Doses of fomesafen (0.0, 0.125, 0.250, and 0.5 kg ha-1) and sulfentrazone (0.0, 0.3, 0.6 and 1.2 kg ha-1) were applied during the pre-emergence of phytoremediate species (black oat, vetch, birdsfood trefoil, radish and lupin). Forty five days after the emergence of the species, the phytotoxicity (%), leaf area (cm2), stalk and/or stem diameter (mm), height (cm) and dry matter (g) variables of the plants were evaluated. Data were submitted to analysis of variance by F test; when significant, linear or non linear regressions were applied to evaluate the effect of herbicide doses on the studied species. Birdsfood trefoil was the less tolerant species to fomesafen and sulfentrazone. Black oat was less affected by the application of fomesafen doses, but it was highly susceptible to sulfentrazone. Radish presented tolerance only up to the fomesafen dose of 0.25 kg ha-1; as for sulfentrazone, the species showed tolerance. The most tolerant species to fomesafen and sulfentrazone, regardless of the dose, was the lupine, which is a possible alternative for the phytoremediation of soils contaminated with these herbicides.


2016 ◽  
Vol 8 (2) ◽  
pp. 143
Author(s):  
Flor De María Argueta ◽  
Rocio Rodríguez ◽  
Miguel Monroig

We evaluated five commercial mixtures against a control treatment consisting of a mixture of soil, sugar cane sludge and silt, which is commonly used in the production of coffee trees in nurseries. The cultivation of coffee trees in the mixture made of perlite, vermiculate and peat moss, was similar to that of plants grown in the control treatment. We detected significant differences in stem diameter and in the fresh weight of foliage. The nutritional analysis of the leaves showed significant differences in K, Mg and Mn contento The levels of the two last elements were significantly lower in the control treatment 


2005 ◽  
Vol 3 (2) ◽  
pp. 11 ◽  
Author(s):  
Marcos Vinicius Winckler Caldeira ◽  
Peter Spathelf ◽  
Leonir Rodrigues Barichello ◽  
Hamilton Luiz Munari Vogel ◽  
Mauro Valdir Schumacher

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.


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