scholarly journals SALINIDADE E MANEJO DA FERTIRRIGAÇÃO EM AMBIENTE PROTEGIDO. II: EFEITOS SOBRE O RENDIMENTO DO MELOEIRO.

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
Keyword(s):  
Electric Conductivity ◽  
Soil Solution ◽  
Soil Salinity ◽  
Cucumis Melo ◽  
Soil Salinization ◽  
Fruit Yield ◽  
Yield Parameters ◽  
Initial Soil ◽  
Salinity Levels ◽  
Cucumis Melo L

 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.

scholarly journals SALINIDADE E MANEJO DA FERTIRRIGAÇÃO EM AMBIENTE PROTEGIDO. I: EFEITOS SOBRE O CRESCIMENTO DE MELOEIRO.

Irriga ◽  
2006 ◽  
Vol 11 (2) ◽  
pp. 208-218 ◽  
Author(s):  
Nildo Da Silva Dias ◽  
Sergio Nascimento Duarte ◽  
José Francismar de Medeiros ◽  
José Francisco Teles Filho
Keyword(s):  
Plant Growth ◽  
Electric Conductivity ◽  
Soil Solution ◽  
Soil Salinity ◽  
Cucumis Melo ◽  
Fertilizer Application ◽  
Saline Stress ◽  
Significant Difference ◽  
Initial Soil ◽  
Cucumis Melo L

SALINIDADE E MANEJO DA FERTIRRIGAÇÃOEM AMBIENTE PROTEGIDO. I: EFEITOS SOBRE O CRESCIMENTO DE 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 Com o objetivo de avaliar o efeito de diferentes níveis de salinidade do solo causados pela aplicação de fertilizantes e de manejos da fertirrigação no crescimento do meloeiro (Cucumis melo L.), conduziu-se um estudo 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 de dois fatores: salinidade inicial do solo aos níveis de 1,0; 2,0; 3,0; 4,0; 5,0 e  6,0 dS m-1 e dois 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. Para avaliar o crescimento das plantas ao longo do ciclo selecionou-se, aleatoriamente, duas plantas de cada parcela a partir dos 19 dias após o transplantio. As variáveis analisadas foram altura de plantas, diâmetro de colo e área foliar. Os resultados mostraram que os efeitos da salinidade do solo sobre a altura e o diâmetro das plantas foram mais severos durante o desenvolvimento vegetativo inicial do que no inicio da frutificação, indicando uma possível adaptação da planta ao estresse salino ao longo do tempo. Não foi possível detectar diferenças expressivas causadas pelos dois tipos de manejo da fertirrigação. 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. I. EFFECTS ON MELON PLANT GROWTH  2 ABSTRACT In order to evaluate melon plant growth under different initial soil salinity levels caused by fertilizer application and different fertigation management, a study was carried out under greenhouse conditions, at the experimental field of Department of Rural Engineering of “Escola Superior de Agricultura Luiz de Queiroz”-USP, Piracicaba, Brazil. Each treatment was a combination of two factors: initial soil salinity (1.0, 2.0, 3.0, 4.0, 5.0 and 6.0 dS m-1) and two fertigation managements (traditional one and with monitoring of the soil solution electric conductivity). The statistical test was carried out in randomized blocks, arranged in a 6x2 factorial design and with four replications.  19 days after transplanting, two plants for each portion was selected at random to evaluate the plants growth along the crop cycle.  The analyzed variables were plant height, stem diameter and leaf area. Results showed that soil salinity effects on the height and diameter of the plants were more severe during early vegetative growth than in beginning of fruiting, indicating a possible plant adaptation to saline stress along time. It was not possible to detect any significant difference caused by the two different proposed fertigation managements. KEYWORDS: Cucumis melo L., soil solution, electric conductivity. 

scholarly journals SALINIZAÇÃO DO SOLO POR APLICAÇÃO DE FERTILIZANTES EM AMBIENTE PROTEGIDO

Irriga ◽  
2007 ◽  
Vol 12 (1) ◽  
pp. 135-143 ◽  
Author(s):  
Nildo Da Silva Dias ◽  
Sergio Nascimento Duarte ◽  
José Francisco Teles Filho ◽  
Roberto Takafumi Yoshinaga
Keyword(s):  
Electric Conductivity ◽  
Cucumis Melo ◽  
Soil Salinization ◽  
Soil Samples ◽  
Second Phase ◽  
Plant Tolerance ◽  
Salinity Levels ◽  
Maximum Water ◽  
Cucumis Melo L ◽  
Tolerance To Salinity

SALINIZAÇÃO DO SOLO POR APLICAÇÃO DE FERTILIZANTES EM AMBIENTE PROTEGIDO  Nildo da Silva Dias1; Sergio Nascimento Duarte2; José Francisco Teles Filho2; Roberto Takafumi Yoshinaga21Departamento de Ciências Ambientais, Universidade Federal Rural do Semi-Árido, Mossoró, RN, [email protected] de Engenharia Rural, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP  1 RESUMO As curvas de salinização artificial de solos por excesso de adubos auxilia experimentos com manejo de fertirrigação e tolerância das plantas à salinidade, visando o controle da salinidade em ambientes protegidos. Para construir as curvas de salinização artificial do solo por aplicação de fertilizantes desenvolveu-se um experimento no Departamento de Engenharia Rural da Escola Superior de Agricultura “Luiz de Queiroz”, município de Piracicaba, SP. A primeira fase do experimento constou de ensaios de curvas de salinidade de água em função da concentração de fertilizantes e, na segunda etapa utilizaram-se amostras de 10 kgde Latossolo Vermelho, os quais foram peneirados, secos ao ar e acondicionados em vasos de 17 L. As amostras de solos foram salinizadas artificialmente por excesso de adubos utilizados na fertirrigação, sendo as quantidades e as proporções de sais aplicados no solo baseados na extração total de nutrientes para a cultura do melão (Cucumis melo L.). A umidade do solo foi elevada até a máxima capacidade de retenção e concomitantemente foram adicionados os sais diluídos na água, obtendo-se nove níveis de salinidade do solo (1,0; 2,0; 3,0; 4,0; 5,0; 6,0; 7,0; 8,0 e 9,0 dS m -1) com três repetições. A curva de salinidade foi testada também em canteiros construídos sob ambiente protegido para se obter seis níveis de salinidade do solo (1,0; 2,0; 3,0; 4,0; 5,0 e 6,0 dS m -1). Pelos resultados constata-se que a salinização artificial do solo requer a elaboração criteriosa de curvas para que sejam adicionados aos solos adubos suficientes para se conseguir níveis de condutividade elétrica no extrato de saturação do solo pré-estabelecido. A técnica utilizada para salinizar artificialmente o solo permitiu que se atingisse CEes desejada com boa precisão. UNITERMOS: salinidade, condutividade elétrica, fertirrigação.  N.S., DIAS; S.N., DUARTE; J.F.T., FILHO; R.T.,YOSHINAGA. SOIL SALINIZATION THROUGH FERTILIZER APPLICATIONS IN GREENHOUSE  2 ABSTRACT The soil artificial salinization curves by over fertilization are helpful to experiments with fertirrigation management and plant tolerance to salinity in greenhouse. An experiment was carried out in a greenhouse located in an experimental area of the Department of Rural Engineering of ESALQ- USP, Piracicaba- SP, Brazil, in order to build artificial salization curves. The first phase of experiment consisted of water salinity curve assays in function of fertilizer concentrations. In the second phase, 10 kgsift-dried Oxisol soil samples conditioned in 17 Lpots were used. The soil samples were salinized artificially by fertilizers through fertirrigation; the applied salt dose amount and proportion were based on melon (Cucumis melo, L.) total nutritional extraction. Soil humidity was increased to maximum water hold capacity by using diluted salt in water and that resulted in 9 different salinity soil levels (1.0, 2.0, 3.0, 4.0, 5.0, 6.0, 7.0, 8.0 and 9.0 dS m -1) with 3 replications.  The salinity curve was tested in soil beds in two greenhouses to obtain six soil salinity levels (1.0, 2.0, 3.0, 4.0, 5.0 e 6.0 dS m -1). Artificial soil salinization requires a careful curve elaboration to produce the desired electric conductivity in the saturation extract. The technique used for soil salinization allowed obtaining satisfactorily accurate EC values. KEYWORDS: salinity, electric conductivity, fertirrigation

scholarly journals Evaluation of Some Rhodes Grass (Chloris gayana) Genotypes for Their Salt Tolerance, Biomass Yield and Nutrient Composition

2019 ◽  
Vol 9 (1) ◽  
pp. 143 ◽  
Author(s):  
Ashenafi Worku Daba ◽  
Asad Sarwar Qureshi ◽  
Bethel Nekir Nisaren
Keyword(s):  
Soil Salinity ◽  
Management Practices ◽  
Germination Percentage ◽  
Soil Salinization ◽  
The Other ◽  
Forage Production ◽  
Rhodes Grass ◽  
Salinity Levels ◽  
Chloris Gayana ◽  
The Impact

The livestock productivity in Ethiopia is seriously constrained by the shortage of fodder due to increasing soil salinization. Therefore, restoration of salt-affected lands into productive soils through salt-tolerant forages and improved irrigation and crop management practices is crucial for enhancing the productivity of the livestock sector in Ethiopia. In this three-year study, pot trials were conducted to evaluate the impact of five different soil salinity levels (i.e., 0, 5, 10, 15, and 20 dS m−1) on plant growth, biomass production, and nutrient quality attributes of three Rhodes grass (Chloris gayana) genotypes (ILRI-6633, ILRI-7384, CV-massaba). Increasing soil salinity negatively affected germination percentage (GP) and mean germination time (MGT) of all genotypes. For all salinity levels, the highest GP was observed for ILRI-6633 and the lowest for CV-massaba. Plant height and chlorophyll content for ILRI-6633 was higher than the other two genotypes. The crude protein (CP) content was higher in low dry matter-producing genotype (ILRI-7384). The performance of ILRI-6633 at all salinity levels was superior to the other two genotypes. CV-massaba genotype performed better under low to medium soil salinity conditions. Therefore, ILRI-6633 and CV-massaba genotypes have excellent potential to increase forage production in salt-affected areas of Ethiopia.

scholarly journals METODOLOGIA PARA AVALIAÇÃO DA SALINIDADE DO SOLO EM AMBIENTE PROTEGIDO

Irriga ◽  
2009 ◽  
Vol 14 (3) ◽  
pp. 383-397 ◽  
Author(s):  
Sergio Oliveira Pinto de Queiroz ◽  
Roberto Testezlaf ◽  
Edson Eiji Matsura
Keyword(s):  
Electrical Conductivity ◽  
Electric Conductivity ◽  
Soil Salinity ◽  
Vacuum Solution ◽  
Irrigation Management ◽  
Saline Soils ◽  
Soil Electrical Conductivity ◽  
Saturation Extract ◽  
Productive Process ◽  
Salinity Levels

METODOLOGIA PARA AVALIAÇÃO DA SALINIDADE DO SOLO EM AMBIENTE PROTEGIDO  Sérgio Oliveira Pinto de Queiroz1; Roberto Testezlaf2; Edson Eiji Matsura21Departamento de Tecnologia e Ciências Sociais, Universidade do Estado da Bahia, Juazeiro, BA,  [email protected]. 2Faculdade de Engenharia Agrícola, Universidade Estadual de Campinas, Campinas, SP  1 RESUMO Em condições de ambiente protegido a irrigação é essencial e a fertirrigação um agente facilitador do manejo da água e fertilização do solo; todavia, o uso contínuo e nem sempre adequado pode elevar a salinidade do solo, comprometendo o processo produtivo. Este trabalho objetivou avaliar uma metodologia para caracterizar a ocorrência de salinização em cultivos protegidos, usando diferentes métodos para determinação da condutividade elétrica do solo. Em laboratório foram avaliados os equipamentos Sensor Sigma Probe EC1, da Delta-T e extratores de solução do solo à vácuo. Os equipamentos foram utilizados em três solos com diferentes texturas e sob cinco níveis de salinidade: 0, 2, 4, 8 e 12 dS. m-1 a 25° C. Os resultados obtidos pelos métodos avaliados foram comparados ao método do extrato de saturação. O equipamento Sigma Probe EC1, por apresentar melhor correlação com o método de referência na fase laboratorial, foi utilizado nas visitas as propriedades, sob produção em ambiente protegido, na macrorregião de Campinas, revelou ser mais eficiente. A aplicação do questionário associada às leituras de condutividade elétrica do solo com o sensor Sigma Probe permitiu diagnosticar a deficiência no manejo da água e condutividade elétrica nas propriedades avaliadas. Os valores obtidos de condutividade elétrica no extrato de saturação do solo para as propriedades visitadas, não caracterizam solos salinos, mas podem afetar a produção de flores e outras plantas sensíveis à salinidade. UNITERMOS: manejo da irrigação; fertirrigação.  QUEIROZ, S. O. P. de.; TESTEZLAF, R.; MATSURA, E. E. METHODOLOGY FOR SOIL SALINITY EVALUATION IN GREENHOUSE  2 ABSTRACT Under controlled environmental conditions, irrigation is essential and the use of fertigation becomes a facilitator agent for water and fertilization management. However, the intensive use of fertigation in this type of productive process can increase soil salinity, and affect productive process. This work objective was to evaluate a methodology in order to characterize the salinization process occurrence of in greenhouse farms using different methods to determine soil electric conductivity l. Sigma Probe EC1, manufactured by Delta-T and vacuum solution manufactured extractors were evaluated under laboratory conditions. The equipment was used in three different soil textures, under five salinity levels: 0, 2, 4, 8 and 12 dS. m-1 at 25° C. The obtained results of electric conductivity were compared to the saturation extract method. The Sigma Probe EC1 equipment was used in farm visits, with controlled environmental production inCampinas macro region. Among the used equipment in the laboratorial part, the sigma Probe EC1 presented the best results for soil electrical conductivity determination, when compared to saturation extract, in saline and non saline soils. Using the questionnaire for electric conductivity determinations using Sigma Probe sensor it was possible to verify the deficiency in the soil moisture and electrical conductivity management. The obtained results for electric conductivity using the saturation extract methods do not characterize saline soils on the visited farms, but they showed that the salinity levels in the soil could affect flower production and other crops sensitive to salinity. KEYWORDS: irrigation management, fertigation.

scholarly journals COMPORTAMENTO PRODUTIVO DO MELOEIRO EM RELAÇÃO À SALINIDADE E FREQUENCIA DE IRRIGAÇÃO1

Irriga ◽  
2003 ◽  
Vol 8 (1) ◽  
pp. 44-50 ◽  
Author(s):  
Adilson David de Barros ◽  
Antonio De Pádua Sousa ◽  
José Francismar de Medeiros
Keyword(s):  
Cucumis Melo ◽  
Block Design ◽  
Water Salinity ◽  
Irrigation Frequency ◽  
Randomized Block Design ◽  
Salinity Levels ◽  
The One ◽  
Production Frequency ◽  
Cucumis Melo L ◽  
E Mail

COMPORTAMENTO PRODUTIVO DO MELOEIRO EM RELAÇÃO À SALINIDADE E FREQUENCIA DE IRRIGAÇÃO1  Adilson David de BarrosDepartamento de Engenharia Agrícola, Centro de Ciências e Tecnologia, Universidade Federal de Campina Grande, Campina Grande, PB. CEP 58109-97. E-mail: [email protected]ônio de Pádua SousaDepartamento de Engenharia Rural,Faculdade de Ciências Agronômicas,Universidade Estadual Paulista, Botucatu, SP. CP 237, CEP 18603-970. E-mail:pá[email protected]é Francismar de MedeirosDepartamento de Engenharia Agrícola, Escola Superior de Agricultura de Mossoró, Mossoró,RN. CEP 59625-900. E-mail: [email protected]  1 RESUMO  Neste trabalho, estudou-se o efeito da água com diferentes níveis salinos em termos de condutividade elétrica (CE = 1,1; 2,5 e 4,5 dS.m-1) e duas frequências de irrigação (1 e 2 dias) na produção da cultivar de melão do tipo HoneyDew (Orange Flesh) e a do tipo cantaloupe (Trusty), em solos de textura franco-arenosa na Fazenda São João Ltda, município de Mossoró-RN. Adotou-se o delineamento experimental em blocos ao acaso no esquema fatorial 3x2x2 com quatro repetições. Dos resultados obtidos, concluiu-se que mesmo sob estresse, a produção de melão irrigado com águas nos níveis salinos de 1,1 dS.m-1 até 2,5 dS.m-1, consegue-se produções economicamente viáveis em relação ao irrigado com as águas de 4,5 dS.m-1. A cultivar Orange Flesh mostrou ser mais sensível aos efeitos dos sais que a Trusty em todos os parâmetros avaliados, demonstrando ser esta última medianamente tolerante aos efeitos deletéricos, reduzindo sua produtividade apenas no nível salino 4,5 dS.m-1, em conformidade com a literatura.  UNITERMOS: Cucumis melo L., salinidade, produção, freqüência  BARROS, A. D.; SOUSA, A. P.; MEDEIROS, J. F. MELON PRODUCTIVE BEHAVIOR IN RELATION TO WATER SALINITY AND IRRIGATION FREQUENCY  2 ABSTRACT  This work has studied the effect of different water salinity levels in terms of electrical conductivity (CE = 1.1; 2.5 and 4.5 dS.m-1) and two irrigation frequencies (1 and 2 days) on HoneyDew (Orange Flesh) and cantaloupe (Trusty) melon production, in loam sand soils in São João Ltda farm, municipal district of Mossoró-RN. The experiment was a 3x2x2 factorial randomized block design with four replications. The results allowed to conclude that even under stress, irrigated melon production at 1.1 dS.m-1 up to 2.5 dS.m-1 saline level water , make production economically feasible in relation to the one at 4.5 dS.m-1 saline level water. Orange Flesh seemed to be more sensitive to the salt effects than the Trusty cultivar in all appraised parameters. Trusty cultivar has shown to be reasonably tolerant to the deleterious effects, decreasing its  productivity only at  4.5 dS.m-1 saline level , which is according to the literature.  KEY-WORDS: Cucumis melo L., salinity, production, frequency

scholarly journals Inheritance of fruit yield and its components in muskmelon (Cucumis melo L.)

2016 ◽  
Vol 11 (2) ◽  
pp. 280-287
Author(s):  
DINAR S. PATIL ◽  
A.M. MUSMADE ◽  
H.K. SHIRSATH
Keyword(s):  
Cucumis Melo ◽  
Fruit Yield ◽  
Cucumis Melo L

scholarly journals Emergence and vegetative development of melon in function of the soil salinity

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
Keyword(s):  
Soil Salinity ◽  
Cucumis Melo ◽  
Arid Regions ◽  
Seedling Emergence ◽  
Saline Stress ◽  
Exchangeable Sodium ◽  
Vegetative Development ◽  
Percentage Points ◽  
Cucumis Melo L ◽  
Different Levels

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.

scholarly journals Physiological behavior of melon cultivars submitted to soil salinity1

2018 ◽  
Vol 48 (3) ◽  
pp. 271-279 ◽  
Author(s):  
Valéria Fernandes de Oliveira Sousa ◽  
Caciana Cavalcanti Costa ◽  
Genilson Lima Diniz ◽  
João Batista dos Santos ◽  
Marinês Pereira Bomfim
Keyword(s):  
Soil Salinity ◽  
Photosynthetic Apparatus ◽  
Poor Quality ◽  
Soil Salinization ◽  
Limiting Factor ◽  
Saline Stress ◽  
Saturation Extract ◽  
Salinity Levels ◽  
Quality Water ◽  
Poor Quality Water

ABSTRACT Melon is one of the most important vegetables for the Brazilian foreign trade. However, in semi-arid areas, the irregular rainfall, excessive use of fertilizers and, especially, poor quality water contribute to the soil salinization, becoming a limiting factor and damaging the photosynthetic apparatus, as well as affecting yield. This study aimed to evaluate the physiological behavior of melon cultivars submitted to soil salinity. For that, an experiment was conducted in a greenhouse, using a randomized block experimental design, in a 3 x 5 factorial scheme, with the first factor related to melon cultivars (Iracema, Goldex and Natal) and the second one related to soil salinity levels (0.3 dS m-1, 1.3 dS m-1, 2.3 dS m-1, 3.3 dS m-1 and 4.3 dS m-1 of electrical conductivity), with four replications. For soil salinization, a saturation extract with initial soil salinity of 0.3 dS m-1 was obtained, while the other levels were prepared by adding NaCl to the soil. The physiology of melon plants is negatively affected by the increased salinity in the soil. The evaluated cultivars do not show differences in tolerance for the physiological response to soil saline stress.

scholarly journals CmRAV1 shows differential expression in two melon (Cucumis melo L.) cultivars and enhances salt tolerance in transgenic Arabidopsis plants

2019 ◽  
Author(s):  
Lina Zhao ◽  
Furong Zhang ◽  
Bin Liu ◽  
Senlin Yang ◽  
Xue Xiong ◽  
...  
Keyword(s):  
Salt Tolerance ◽  
Cucumis Melo ◽  
Molecular Mechanisms ◽  
Transgenic Arabidopsis ◽  
Transcript Level ◽  
Soil Salinization ◽  
Saline Stress ◽  
Growth Stages ◽  
Plant Salt Tolerance ◽  
Cucumis Melo L

Abstract The growth and development of melon (Cucumis melo L.) are severely affected by soil salinization in many areas of the world, but the understanding of the molecular mechanisms underlying salt tolerance in melon remains limited. In this study, a new RAV (related to ABI3/VP1) gene, CmRAV1, was identified in melon. Protein structure homology analysis revealed that CmRAV1 contains an AP2 domain and a B3 domain, and subcellular localization assay revealed that CmRAV1 is localized in the nucleus. The transcript level of CmRAV1 was closely correlated with NaCl treatment, and the expression pattern of CmRAV1 differed between two cultivars (salt-tolerant and salt-sensitive cultivars) under NaCl treatment. In addition, yeasts transformed with CmRAV1 showed notably improved growth on medium containing 200 mM NaCl compared with wild-type ones. The overexpression of CmRAV1 in transgenic Arabidopsis thaliana resulted in enhanced salt tolerance at the seed germination and seedling growth stages. This study demonstrated that the expression of CmRAV1 was associated with saline stress and can potentially be utilized to improve plant salt tolerance.

scholarly journals Growth and yield of Bangi (Cucumis melo L.) in charland agriculture affected by micronutrients

2021 ◽  
Vol 6 (1) ◽  
pp. 54-58
Author(s):  
A.K.M. Golam Sarwar ◽  
Jannat-E-Tajkia ◽  
Sontosh Chandra Chanda ◽  
Md. Ashrafuzzaman
Keyword(s):  
Nutritional Quality ◽  
Cucumis Melo ◽  
Management Practices ◽  
Nutrient Management ◽  
Fruit Yield ◽  
Growth And Yield ◽  
Cow Dung ◽  
Cucumis Melo L ◽  
Summer Fruit ◽  
Plant Length

Bangi (Cucumis melo L.) is an important short duration summer fruit crop, it is rich in vitamins and minerals, facilitated to protect from hidden hunger. To expedite the growth attributes and fruit yield of Bangi through micronutrient application for the Charland Agriculture, an experiment was conducted at the farmer’s (Charland) field in two locations viz., Sadar and Belkuchi upazilas of Sirajgong district, Bangladesh. The crop was cultivated following farmer’s management practices in mada(s)/pits (spacing 3.5 m × 3.5 m) in RCBD design with 3 replications. Two fertilizer doses as control (farmers practice; cow dung + NPK) and improved practice (farmers practice + micronutrients), were used as experimental treatments. The application of micronutrients enhanced plant length and other growth descriptors and fruit yield as well; however, locations did not affect the studied descriptors except the number of secondary branches plant–1 and leaf characters. The plant length varied from 148.6 cm to 321.7 cm, the fruit yield (number plant–1) almost quadrupled and size more than double due to improved practice (with micronutrients) resulting in 4–5 times increase the farmer's profit compared to conventional (farmers) practices. Further research on the effect of micronutrients on nutritional quality enhancement (Biofortification) and self-life is suggested for better understanding and nutritional quality improvement processes of Bangi through nutrient management.

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