scholarly journals Response of Muskmelon (Cucumis melo L.) cv. Durgapur Madhu to Different Levels of Gibberellic Acid and Time of Seed Soaking on Yield Parameters and Economics

Author(s):  
K.S. Pandya ◽  
L.R. Varma ◽  
T. Thomson ◽  
J.B. Thakar ◽  
Y.D. Pawar
2013 ◽  
Vol 13 (3) ◽  
pp. 165-171 ◽  
Author(s):  
Zdenka Girek ◽  
Slaven Prodanovic ◽  
Jasmina Zdravkovic ◽  
Tomislav Zivanovic ◽  
Milan Ugrinovic ◽  
...  

Seven traits related to flowering and sex expression in melon were studied and their reaction to application of two growth regulators (ethrel and gibberellic acid) was observed. Four monoecious genotypes (Sesame, ED-3, ED-4, Pobeditel) and four andromonoecious genotypes (Chinese muskmelon, Anannas, Fiata, A2-3lb) had been used for experiments. According to the results, ethrel had higher effects on the investigated traits than gibberellic acid. Ethrel increased the number of perfect flowers per plant for 7.18 (31.42%), reduced the number of male flowers per plant for 21.47 (17.98%), affected earlier appearance of the first pistillate/perfect flower for 3.68 days, and delayed the appearance of the first staminate flower for 16.07 days. Changes in the last two traits caused an extension of the period from the emergence of the first pistillate/perfect to the first staminate flower from 0.1 to 21.57 days, which represents the strongest effect of ethrel. Gibberellic acid had generally opposite effects on the studied traits.


2019 ◽  
Vol 13 ((03) 2019) ◽  
pp. 458-464 ◽  
Author(s):  
Daniel Teixeira Pinheiro ◽  
Fabio Delazari ◽  
Carlos Nick ◽  
Edson Marcio Mattiello ◽  
Denise Cunha Fernandes dos Santos Dias

Soil salinity is one of the main factors limiting the development and global agricultural productivity. Melon (Cucumis melo L.) is mainly produced in arid and semi-arid regions around the world, favoring the accumulation of soluble salts in the soil. Therefore, this study aimed to evaluate the emergence and vegetative development of melon genotype under different levels of soil salinity. The assessments were performed based on the exchangeable sodium percentage (ESP) at 0, 20, 25, 30 and 35%. The emergence was affected around 30 percentage points, by comparing the control and the highest dose (35%). The emergence speed and the emergence speed index parameters were also affected in a similar way, as well as the length and dry matter of the shoot. The growth of the plants was also affected by the saline stress, being superior in the control (0%) in relation to the treatments with NaCl. The leaf area increased between weeks 4 and 7 after the planting and was slightly superior in the control in relation to the plants submitted to saline stress (20, 25, 30 and 35% of exchangeable sodium). The melon is more sensible to the saline stress in the seedling emergence than in the vegetative development over time. The development of melon seedlings is mainly affected in exchangeable sodium values superior to 20%. The analyzed hybrid is sensible to the saline stress even in 20% of exchangeable sodium.


2018 ◽  
Vol 9 (3) ◽  
pp. 381-392
Author(s):  
Christiano Rebouças Cosme ◽  
Nildo Da Silva Dias ◽  
Karen Mariany Pereira Silva ◽  
John Lenon Vasconcelos Fonteles ◽  
Marcelo Tavares Gurgel ◽  
...  

To evaluate the effects of applying different concentrations of the nutrient solution macronutrients in growth of melon cultivated in coconut fiber it was conducted this experiment uses the ‘Galia’ melon (Cucumis melo L., hybrid Babilonia RZ F1). The experimental design was a randomized blocks utilizing five treatments, which corresponded to different concentrations of macronutrients in nutritive solutions (corresponding to different levels of nutrient solution macronutrients) based on the standard solution for the melon proposed by Furlani: 100 (control), 75, 50, 25, and 12.5%, applied in five replications. The concentration of 50% provided higher production of dry matter of the aerial part and leaf area. The absolute aerial part growth rate showed different tendencies for levels being that concentration of 50% produced the best results. The relative growth rate of the aerial part and assimilation rate of the aerial part decrease with time for all concentrations of the nutrient solutions tested.


Irriga ◽  
2006 ◽  
Vol 11 (3) ◽  
pp. 376-383 ◽  
Author(s):  
Nildo Da Silva Dias ◽  
Sérgio Nascimento Duarte ◽  
José Francismar de Medeiros ◽  
José Francisco Teles Filho

 SALINIDADE E MANEJO DA FERTIRRIGAÇÃOEM AMBIENTE PROTEGIDO. II: EFEITOS SOBRE O RENDIMENTO DO MELOEIRO.  Nildo da Silva Dias1; Sergio Nascimento Duarte2; José Francismar de Medeiros1; José Francisco Teles Filho21Departamento de Engenharia Ambiental, Universidade Federal Rural do Sem- Árido, Mossoró, RN, [email protected] de Engenharia Rural, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP  1 RESUMO Devido à falta de conhecimento por parte dos nossos agricultores e técnicos a respeito do manejo adequado da fertirrigação, tem sido freqüente os problemas de salinização de solo, sobretudo em ambiente protegido. Neste sentido, o presente trabalho teve como objetivo estudar os efeitos de dois manejos da fertirrigação e de diferentes níveis de salinidade iniciais do solo causados pela aplicação excessiva de fertilizantes no rendimento do meloeiro (Cucumis melo L.). O experimento foi desenvolvido em ambiente protegido na área experimental do Departamento de Engenharia Rural da ESALQ/USP, localizado no município de Piracicaba, SP. Os tratamentos foram compostos da combinação dos fatores: salinidade inicial do solo aos níveis 1,0; 2,0; 3,0; 4,0; 5,0 e 6,0 dS m-1 e dos manejos de fertirrigação tradicional e com controle da condutividade elétrica da solução do solo. O delineamento estatístico adotado foi o de blocos casualizados completos com 4 repetições, sendo os fatores estudados arranjados em esquema fatorial de 6 x 2. Determinou-se o limite máximo da salinidade (salinidade limiar) tolerada pela cultura, causada pelo excesso de sais fertilizantes e seus efeitos sobre as variáveis rendimento total e comercial de frutos por planta e nos componentes de produção (Peso médio de frutos comerciais e totais). Pelos resultados, o rendimento total e comercial e o peso médio dos frutos foram significativamente reduzidos com o aumento da salinidade do solo, mas o manejo da fertirrigação não influenciou significativamente sobre as variáveis estudadas. UNITERMOS: Cucumis melo L., solução do solo, condutividade elétrica.  DIAS, N.S, DUARTE, S.N; MEDEIROS, J.F.; TELES FILHO, J.F. SALINITY AND FERTIGATION MANAGEMENT IN GREENHOUSES. II: EFFECTS ON FRUIT YIELD OF MELON  2 ABSTRACT Due to the lack of knowledge of the appropriate fertigation management in greenhouses by our farmers and technicians, problems of soil salinization have been frequently observed. The objective of the present work was to study the effects of different initial soil salinity levels caused by fertilizer application, with differentiated fertigation management, on yield of melon plants (Cucumis melo L.). The experiment was carried out under greenhouse conditions, in the Department of Rural Engineering of “Escola Superior de Agricultura Luiz de Queiroz”-USP, Piracicaba, Brazil. The treatments consisted of a combination of factors, initial soil salinity levels of 1.0, 2.0 3.0 4.0, 5.0 and 6.0 dS m-1 and fertigation management (traditional and with soil solution electric conductivity monitoring). The statistical test was carried out in randomized blocks, arranged in a 6x2 factorial design, and four replications. Soil salinity maximum limit for that culture, caused by fertilizer excess, was determined and its effects on fruit yield parameters and total and marketable yields. Results showed that both total and marketable fruit yields and total weight per fruit were significantly reduced as soil salinity increased, but fertigation management did not significantly affected this yield parameters. KEYWORDS: Cucumis melo L., soil solution, electric conductivity.


Author(s):  
César Elías Baquero Maestre ◽  
Ángela Arcila Cardona ◽  
Heriberto Arias Bonilla ◽  
Marlon Yacomelo Hernández
Keyword(s):  

ChemInform ◽  
2011 ◽  
Vol 42 (8) ◽  
pp. no-no
Author(s):  
Gene E. Lester ◽  
John L. Jifon ◽  
Donald J. Makus

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