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Efeitos da aplicação de efluente de tratamento de esgoto na fertilidade do solo e produtividade de pepino sob irrigação subsuperficial

Azevedo, Leonardo P. de; Oliveira, Eduardo L. de
Fonte: Associação Brasileira de Engenharia Agrícola (SBEA) Publicador: Associação Brasileira de Engenharia Agrícola (SBEA)
Tipo: Artigo de Revista Científica Formato: 253-263
Português
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O experimento foi conduzido com o objetivo de avaliar técnicas para a aplicação de águas residuárias na agricultura, proporcionando melhor reutilização de água, recurso natural atualmente escasso e muito mal disponibilizado. Utilizou-se da cultura de pepino (Cucumis sativus L.) em estufa, com oito parcelas irrigadas com efluentes de tratamento de esgoto residencial e oito parcelas irrigadas com água tratada e distribuída pela SABESP (tratamento-testemunha), ambas abastecidas por sistema de irrigação subsuperficial, avaliando-se a produção média por planta, a fertilidade do solo e a disposição de nutrientes na água do solo. Nas análises do solo, verificaram-se maiores teores de P, K e CTC no solo irrigado com efluentes. Nesse mesmo tratamento, constataram-se os maiores teores de N, nitrato, Ca, Mg, Zn e S para as análises da água retida na matriz do solo. Quanto à produção total média por planta, as parcelas irrigadas com efluente apresentaram 2.769,6 g de matéria fresca, superior aos 1.968,6 g verificados no tratamento-testemunha, demonstrando a importância da utilização de efluente de esgoto para o fornecimento de nutrientes e aumento de produtividade.; The objective of this work was to develop techniques to apply wasted water in agriculture...

Produção de pepino de plantas enxertadas cultivadas em soluções nutritivas com diferentes teores de potássio

Costa, Paulo César; Cañizares, Kathia Alexandra L.; Goto, Rumy
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica Formato: 339-341
Português
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O experimento foi conduzido em estufa tipo arco de 50 m² na Faculdade de Ciências Agronômicas da UNESP em Botucatu. Plantas de pepino (Cucumis sativus L.) não enxertadas e enxertadas em abóbora (Cucurbita sp.) foram cultivadas em sistema hidropônico para estudar o efeito de níveis de potássio (45; 90; 180 e 360 mg.L-1 de K) na altura da planta e produção de número de frutos/m². A condução das plantas foi em vasos de 28 L de capacidade contendo 20% vermiculita + 80% casca de arroz + solução nutritiva fornecida a partir de galões individuais contendo 20 litros de solução. O delineamento experimental foi blocos casualizados, com oito tratamentos (fatorial 4 x 2) e três repetições. Não houve efeito da enxertia e das doses de K sobre a altura da planta, porém, os níveis de potássio independente da enxertia alteraram o início da floração. A enxertia potencializou a produção aumentando em 39% o número de frutos/m² quando fornecido na solução nutritiva 45 mg.L-1 de K e 144% com 360 mg.L-1 de K. O menor teor de potássio, 45 mg.L-1, foi suficiente para atingir alta produção.; The trial was carried out at Faculdade de Ciências Agronômicas in Botucatu, Brazil. Cucumber plants (Cucumis sativus L.) grafted on squash (Cucumis sp.) were cultivated in hydroponic solution to study the effect of three potassium levels (45; 90; 180 and 360 mg.L-1 K) on growth and yield of grafted and non grafted cucumber plants. There was no effect of plant height...

Comparação de métodos de enxertia em pepino

Canizares, Kathia Alexandra L.; Goto, Rumy
Fonte: Associação Brasileira de Horticultura Publicador: Associação Brasileira de Horticultura
Tipo: Artigo de Revista Científica Formato: 95-99
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Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP); Foram comparados três métodos de enxertia sobre o crescimento, floração e produção de pepino (Cucumis sativus L.), híbrido Hokuho enxertado em abóbora (Cucurbita maxima Duch.), hibrido Excite Ikky. O ensaio foi instalado em ambiente protegido na UNESP-FCA em Botucatu. Plantas enxertadas por fenda, encostia e perfuração apical foram comparadas com plantas não enxertadas. As características avaliadas foram sobrevivência de mudas, altura da planta, número de internódios, diâmetro do hipocótilo, número de dias até a floração, número de flores femininas e masculinas, número de dias até o inicio da colheita, número de frutos abortados e comerciáveis/planta em cinco semanas de colheita. O delineamento experimental foi de blocos ao acaso, com cinco repetições e dois vasos por parcela. As plantas não enxertadas apresentaram maior porcentagem de sobrevivência. A enxertia por qualquer método não influenciou na altura das plantas, mas o número de internódios foi superior nas plantas enxertadas por fenda. O diâmetro do hipocótilo e o número de frutos abortados foi maior nas plantas enxertadas. A enxertia não modificou a expressão sexual nem a produção de frutos comerciáveis/planta. Foi observada a presença de brilho na casca de todos os frutos colhidos de plantas enxertadas.; A trial was carried out under protected cultivation to compare three grafting methods on growth...

Pepino japonês (Cucumis sativus L.) submetido ao tratamento com fécula de mandioca

Reis,Kelen Cristina dos; Elias,Heloisa Helena de Siqueira; Lima,Luiz Carlos de Oliveira; Silva,José Daniel; Pereira,Joelma
Fonte: Editora da Universidade Federal de Lavras Publicador: Editora da Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/06/2006 Português
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Com o presente trabalho objetivou-se avaliar a qualidade e a vida útil do pepino (Cucumis sativus L.), utilizando recobrimento com película de fécula de mandioca. Após seleção, amostras de pepino japonês foram mergulhadas em suspensões de fécula de mandioca a 0, 2, 3 e 4%, secos ao ar e armazenados em câmara fria a 5ºC e 95% de UR por 8 dias. As análises realizadas foram perda de massa, pH, sólidos solúveis (SS) , acidez titulável (AT), Cor L*a*b e firmeza. O delineamento utilizado foi o DIC com 3 repetições, com os tratamentos dispostos em esquema fatorial 4 x 5. O valor encontrado para firmeza nas amostras tratadas com película a 4% foram menores em comparação aos outros tratamentos, isto, provavelmente se deve à plasticidade do tecido que estas amostras apresentaram. A película reduziu significativamente a perda de massa das amostras mantidas sob refrigeração. A aplicação de película de fécula de mandioca na concentração mais elevada (4%), proporcionou ao pepino um aspecto melhor de conservação, tornando o produto mais atraente.

Organization of highly repetitive satellite DNA of two Cucurbitaceae species (Cucumis melo and Cucumis sativus).

Hemleben, V; Leweke, B; Roth, A; Stadler, J
Fonte: PubMed Publicador: PubMed
Tipo: Artigo de Revista Científica
Publicado em 22/01/1982 Português
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The prominent satellites of the Cucurbitaceae Cucumis melo (melon) and Cucumis sativus (cucumber) have been characterized, in actinomycin/CsCl gradients where the satellite sequences can be separated from ribosomal, organelle, and main band DNA the location of the satellites is different indicating a different GC content. The purified satellite of C. melo is cut by HindIII into a repeat unit of 380 bp; AluI digestion gives rise to two bands (about 80 and 220 bp in size). The HindIII repeat unit if cloned into pBR325 exhibits new recognition sites for HpaII leaving two bands with 150 and 80 bp suggesting methylation of the C/CGG cutting site in the uncloned material. The restriction pattern indicates an internal sequence repeat within the 380 bp HindIII fragment. The C. sativus satellite is cut by AluI to a repeat unit of 180 bp showing no other recognition site for the restriction enzymes tested so far. About 10% sequence homology has been determined between the C. melo and C. sativus satellites by cross hybridization studies. A high methylation degree of cytosines has been measured for both satellites and the ribosomal DNA of C. sativus (about 30%). No transcription products of the C. melo satellite were found during seedling development.

Cucumber (Cucumis sativus) and melon (C. melo) have numerous wild relatives in Asia and Australia, and the sister species of melon is from Australia

Sebastian, Patrizia; Schaefer, Hanno; Telford, Ian R. H.; Renner, Susanne S.
Fonte: National Academy of Sciences Publicador: National Academy of Sciences
Tipo: Artigo de Revista Científica
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Among the fundamental questions regarding cultivated plants is their geographic origin and region of domestication. The genus Cucumis, which includes cucumber (Cucumis sativus) and melon (Cucumis melo), has numerous wild African species, and it has therefore been assumed that melon originated in Africa. For cucumber, this seemed less likely because wild cucumbers exist in India and a closely related species lives in the Eastern Himalayas. Using DNA sequences from plastid and nuclear markers for some 100 Cucumis accessions from Africa, Australia, and Asia, we show here that melon and cucumber are of Asian origin and have numerous previously overlooked species-level relatives in Australia and around the Indian Ocean. The wild progenitor of C. melo occurs in India, and our data confirm that the Southeast Asian Cucumis hystrix is the closest relative of cucumber. Most surprisingly, the closest relative of melon is Cucumis picrocarpus from Australia. C. melo diverged from this Australian sister species approximately 3 Ma, and both diverged from the remaining Asian/Australian species approximately 10 Ma. The Asian/Australian Cucumis clade comprises at least 25 species, nine of them new to science, and diverged from its African relatives in the Miocene...

The Genome Sequence of the North-European Cucumber (Cucumis sativus L.) Unravels Evolutionary Adaptation Mechanisms in Plants

Wóycicki, Rafał; Witkowicz, Justyna; Gawroński, Piotr; Dąbrowska, Joanna; Lomsadze, Alexandre; Pawełkowicz, Magdalena; Siedlecka, Ewa; Yagi, Kohei; Pląder, Wojciech; Seroczyńska, Anna; Śmiech, Mieczysław; Gutman, Wojciech; Niemirowicz-Szczytt, Ka
Fonte: Public Library of Science Publicador: Public Library of Science
Tipo: Artigo de Revista Científica
Publicado em 28/07/2011 Português
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Cucumber (Cucumis sativus L.), a widely cultivated crop, has originated from Eastern Himalayas and secondary domestication regions includes highly divergent climate conditions e.g. temperate and subtropical. We wanted to uncover adaptive genome differences between the cucumber cultivars and what sort of evolutionary molecular mechanisms regulate genetic adaptation of plants to different ecosystems and organism biodiversity. Here we present the draft genome sequence of the Cucumis sativus genome of the North-European Borszczagowski cultivar (line B10) and comparative genomics studies with the known genomes of: C. sativus (Chinese cultivar – Chinese Long (line 9930)), Arabidopsis thaliana, Populus trichocarpa and Oryza sativa. Cucumber genomes show extensive chromosomal rearrangements, distinct differences in quantity of the particular genes (e.g. involved in photosynthesis, respiration, sugar metabolism, chlorophyll degradation, regulation of gene expression, photooxidative stress tolerance, higher non-optimal temperatures tolerance and ammonium ion assimilation) as well as in distributions of abscisic acid-, dehydration- and ethylene-responsive cis-regulatory elements (CREs) in promoters of orthologous group of genes, which lead to the specific adaptation features. Abscisic acid treatment of non-acclimated Arabidopsis and C. sativus seedlings induced moderate freezing tolerance in Arabidopsis but not in C. sativus. This experiment together with analysis of abscisic acid-specific CRE distributions give a clue why C. sativus is much more susceptible to moderate freezing stresses than A. thaliana. Comparative analysis of all the five genomes showed that...

Pepino japonês (Cucumis sativus L.) submetido ao tratamento com fécula de mandioca

Fonte: Editora da Universidade Federal de Lavras Publicador: Editora da Universidade Federal de Lavras
Tipo: Artigo de Revista Científica Formato: text/html
Português
Relevância na Pesquisa
68.857793%
Com o presente trabalho objetivou-se avaliar a qualidade e a vida útil do pepino (Cucumis sativus L.), utilizando recobrimento com película de fécula de mandioca. Após seleção, amostras de pepino japonês foram mergulhadas em suspensões de fécula de mandioca a 0, 2, 3 e 4%, secos ao ar e armazenados em câmara fria a 5ºC e 95% de UR por 8 dias. As análises realizadas foram perda de massa, pH, sólidos solúveis (SS) , acidez titulável (AT), Cor L*a*b e firmeza. O delineamento utilizado foi o DIC com 3 repetições, com os tratamentos dispostos em esquema fatorial 4 x 5. O valor encontrado para firmeza nas amostras tratadas com película a 4% foram menores em comparação aos outros tratamentos, isto, provavelmente se deve à plasticidade do tecido que estas amostras apresentaram. A película reduziu significativamente a perda de massa das amostras mantidas sob refrigeração. A aplicação de película de fécula de mandioca na concentração mais elevada (4%), proporcionou ao pepino um aspecto melhor de conservação, tornando o produto mais atraente.

Diversity of Spanish landraces of Cucumis sativus and Cucurbita ssp

Esteras, C.; Diez, M.J.; Pico, B.; Sifres, A.; Valcarcel, J.V.; Nuez, F.
Fonte: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France) Publicador: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France)
Tipo: Conference Paper
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The Genebank of the COMAV at the UPV holds an important collection of cucurbits. It contains more than 1000 accessions belonging to the Cucurbita genus and about 180 accessions of Cucumis sativus. In this work a previously established core collection of 52 C. pepo landraces has been characterized with SSRs markers. Also the geographical variation and the utility of seed traits for classifying C. moschata accessions have been tested using a collection of 250 landraces. The variability of a collection of 63 accessions of C. sativus has been inspected using qualitative and quantitative traits. The SSR results support the idea that only a part of the great variability present in the area of origin of the species arrived into Europe. In fact some Spanish types share alleles with Central-American accessions, but others represent a more genetically distant group. The analysis allowed the selection of the accessions that better represent the extant Spanish variability in C. pepo. The Spanish accessions of C. moschata were highly variable, with the highest variability found in the Canary Islands and in the Mediterranean region within the Iberian Peninsula. Up to 9 morphotypes were identified, with variability for fruit size, rind and flesh color. A lack of correlation between fruit and seed traits was found in this species...

Methods of isolation of Cucumis sativus and C. melo pollen grains and their utilization in in vitro pollination

Skálová, D.; Navrátilová, B.; Lebeda, A.
Fonte: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France) Publicador: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France)
Tipo: Poster
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Optimizing manipulation with pollen grains is necessary for successful in vitro pollination. This pollination can be used for overcoming crossing barriers in interspecific hybridization in the genus Cucumis. Pollen grains from Cucumis sativus and C. melo were isolated by various methods. Different techniques of centrifugation were compared with direct isolation of pollen grains from anthers. The viability of pollen grains was evaluated and their ability to form pollen tubes was tested. Three isolation media (NLN, YST and VB) and two cultivation media (YS and CP) were used. Then pollen grains were cultivated with ovules of C. sativus and the level of regeneration was observed. The growing and green ovules were considered as the lowest level and the highest level was the formation of callus.; Cucurbitaceae 2008. IX EUCARPIA Meeting. Avignon (France), May 21-24th, 2008

Possible involvement of CsTypA1 in reproductive organ development of cucumber (Cucumis sativus)

Barak, M.; Trebitsh, T.
Fonte: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France) Publicador: INRA. Centre de Recherche d'Avignon. Unité Génétique et Amélioration des Fruits et Légumes, Montfavet (France)
Tipo: Poster
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Cucumber (Cucumis sativus) is a monoecious plant that is extensively studied with respect to floral sex determination. While the genetic background, hormonal and environmental factors are well characterized, the molecular mechanisms regulating unisexual flower development are not well understood. Initially a cucumber floral bud is bisexual and has the potential to develop into a male or female flower. Using differential cDNA-AFLP analysis between plant apices of monoecious (predominantly male) and gynoecious (female) cucumber plants, we isolated a cDNA that encodes a putative GTP binding protein tyrosine phosphorylated protein A (CsTypA1). TypA genes are widely distributed in plants and prokaryotes. Bacterial TypA proteins are involved in protein translation and have been proposed to function as global regulators of various regulatory pathways. The role for TypA proteins in plants is unknown. In cucumber, CsTypA1 is expressed differentially during male and female flower development and is highly expressed in the ovary particularly in the ovules. Our data imply that CsTypA1 is involved in reproductive organ development.; Cucurbitaceae 2008. IX EUCARPIA Meeting. Avignon (France), May 21-24th, 2008

Cucumis sativus

Jose Vazquez
Fonte: Universidade Nacional Autônoma do México Publicador: Universidade Nacional Autônoma do México
Tipo: imagen
Português
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Flor de Cucumis sativus L. (Colector: Jose Vazquez-1942)

Cucumis sativus

Jose Vazquez
Fonte: Universidade Nacional Autônoma do México Publicador: Universidade Nacional Autônoma do México
Tipo: imagen
Português
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Cultivar de Cucumis sativus L. (Colector: Jose Vazquez-1942)

Cucumis sativus

Jose Vazquez
Fonte: Universidade Nacional Autônoma do México Publicador: Universidade Nacional Autônoma do México
Tipo: imagen
Português
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68.857793%
Flor de Cucumis sativus (Colector: Jose Vazquez-1942)

Compensation for herbivory by Cucumis sativus through increased photosynthetic capacity and efficiency

Thomson, V; Cunningham, Saul; Ball, Marilyn; Nicotra, Adrienne
Fonte: Springer Publicador: Springer
Tipo: Artigo de Revista Científica
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Herbivory is an important selective pressure in the life history of most plant species, as it usually results in reduced plant fitness. In some situations, however, plants are able to compensate for the resources lost to herbivory and do not suffer any reduction in growth or reproduction after attack. We examined the ability of Lebanese cucumber (Cucumis sativus) to compensate for both pre-flowering and during-flowering foliar herbivory through increased photosynthetic efficiency and capacity. Plants that were damaged before flowering were able to compensate, in terms of vegetative biomass and fruit production for up to 80% leaf area loss. Plants that were damaged during the flowering period were less able to compensate and fruit production declined with increasing herbivory. Damaged plants had higher photosynthetic efficiency and capacity, and dissipated less light energy as heat. Herbivore-damaged plants may be induced to use a greater proportion of the absorbed light energy for photosynthesis as a result of altered carbohydrate source-sink relationships.

Herbivory Differentially Affects Male and Female Reproductive Traits of Cucumis sativus

Thomson, V; Nicotra, Adrienne; Cunningham, Saul
Fonte: Georg Thieme Verlag Publicador: Georg Thieme Verlag
Tipo: Artigo de Revista Científica
Português
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Herbivory is an important selection pressure in the life history of plants. Most studies use seed or fruit production as an indication of plant fitness, but the impact of herbivory on male reproductive success is usually ignored. It is possible that plants compensate for resources lost to herbivory by shifting the allocation from seed production to pollen production and export, or vice versa. This study examined the impact of herbivory by Helix aspersa on both male and female reproductive traits of a monoecious plant, Cucumis sativus. The effects of herbivory on the relative allocation to male and female flowers were assessed through measurements of the number and size of flowers of both sexes, and the amount of pollinator visitation. We performed two glasshouse experiments; the first looked at the impact of three levels of pre-flowering herbivory, and the second looked at four levels of herbivory after the plants had started to flower. We found that herbivory during the flowering phase led to a significant increase in the number of plants without male flowers. As a consequence there was significantly less pollen export from this population, as estimated by movement of a pollen analog. The size of female flowers was reduced by severe herbivory...

The Differences Between Products Of Gene Expression In Male, Female And Hermaphrodite Cucumber Floral Buds (Cucumis Sativus L.)

Magdalena Pawelkowicz; Ewa Siedlecka; Zbigniew Przybecki
Fonte: Nature Preceedings Publicador: Nature Preceedings
Tipo: Poster
Português
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Cucumber is a species in which sex expression has been extensively studied. Sexual differentiation is controlled by genotypic and environmental factors. The main genes responsible for sex determination have been described but the mechanism of their action remains unexplained. In this study we attempted to find cDNA clones which can be connected with sex differentiation and flower development in cucumber. Two pairs of nearly isogenic lines: GY-3 (gynoecious – FFMMGG) and HGY-3 (hermaphrodite - FFmmGG), B10 (monoecious - ffMMGG) and 2gg (gynoecious - FFMMgg) were used to search for differences in gene expression in young (1 – 2mm) cucumber floral buds. In order to obtain differentially expressed cDNA clones the differential screening and the differential subtraction chain (DSC) methods were used. Altogether above 900 cDNA clones were isolated and part of them were randomly chosen and sequenced (tab. 1 and 2).  To observe the expression patterns of isolated cDNA clones in developing flowers at different developmental stages, we performed in situ RT-PCR. Here we present the results for two cDNA clones designed as 216GY3 and 35GY3.The expression of 35 Gy3 clone, similar to hypotehetical protein from A. Thaliana...

Estudo econômico da produção de pepino em cultivos com e sem solo em casas de vegetação na Turquia; Economic analysis of soilless and soil-based greenhouse cucumber production in Turkey

Engindeniz, Sait; Gül, Ayse
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/10/2009 Português
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Since the onset of the commercial application of soilless culture, this production approach has evoluted at a fast pace, gaining popularity among growers throughout the world. As a result, a lot of information has been developed by growers, advisors, researchers, and suppliers of equipment and substrate. This study aimed to determine the cost and return of soilless greenhouse cucumber (Cucumis sativus L.) production and to prepare a sample budget for growers. Soilless cultivation is an alternative production method for Turkish growers and it is being practised on a commercial basis on 180 ha. Cost and return budgets can be useful for growers because they allows growers to compare total production cost and revenue varying grower type, production time, geographical location, operation size, and cost structure. Growers can identify items in their budget that have a greater effect on profitability, and make adjustments. In this study, economic aspects of soilless and soil-based greenhouse cucumber production was analysed as comparative. Total costs were subtracted from total gross revenue to calculate the net return of soilless and soil-based greenhouse cucumber production. The cost items of soilless and soil-based greenhouse cucumber production were initial investment costs...

Florescimento e produção de pepino japonês em função de cores de cobertura de solo e enxertia; Colored polyethylene soil covers and grafting effects on cucumber flowering and yield

Fonseca, Inês Cristina de Batista; Klar, Antonio Evaldo; Goto, Rumy; Neves, Carmen Silvia Vieira Janeiro
Fonte: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz Publicador: Universidade de São Paulo. Escola Superior de Agricultura Luiz de Queiroz
Tipo: info:eu-repo/semantics/article; info:eu-repo/semantics/publishedVersion; ; ; ; ; Formato: application/pdf
Publicado em 01/12/2003 Português
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Cucumber (Cucumis sativus L.) is one of the most cultivated vegetable crops in plastic greenhouses in Brazil because of the short cycle and its high economic value in off-season harvests. To better understand this management technique the effect of different colored polyethylene soil covers was evaluated in relation to flowering and yield of the hybrid cucumber 'Yoshinari' grafted or not on the hybrid squash 'Ikky'. The polyethylene cover colors were black, white on black and green plus a control without cover. Covered but not grafted crops had a more uniform flowering distribution. The number of flowers was greater for the white/black grafted treatment. All the polyethylene covers favored flowering for the non grafted plants. Grafting reduced flowering for the black or green polyethylene covers treatments. The fruit set increased with the use of polyethylene cover but was not influenced by grafting. The uniform distribution of flowering remained during fruiting only for grafted plants and soil covered with black or green polyethylene. Both polyethylene cover and grafting favored early harvesting. The 'Yoshinari'/'Ikky' graft caused taller plants but fruit were thicker and smaller and did not meet the commercial standard. The best quality fruit and highest yields were obtained in the black and white/black treatments...

Evaluación química y microbiológica del pepino (Cucumis sativus L.) cultivado con aguas residuales

Morillo,Gustavo; Monsalve,Ramón; Mendoza,Jean; Isea,Daisy; Araujo,Ismenia; Vargas,Luis; Angulo,Nancy
Fonte: Facultad de Ingeniería, Universidad del Zulia Publicador: Facultad de Ingeniería, Universidad del Zulia
Tipo: Artigo de Revista Científica Formato: text/html
Publicado em 01/04/2009 Português
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Se realizó un ensayo a escala piloto con la finalidad de comprobar la posibilidad de reutilizar las aguas residuales domésticas, después de ser tratadas en el sistema de lagunas de estabilización del Centro de Investigación del Agua (CIA) en la Facultad de Ingeniería de la Universidad del Zulia, en la producción de cultivos hidropónicos de pepino (Cucumis sativus L.). Se aplicaron tres tratamientos: agua potable con solución nutritiva; agua residual tratada proveniente del sistema B y agua residual del sistema B con solución nutritiva; cada uno con seis repeticiones. Cada quince días se realizó una renovación completa de las aguas utilizadas. En aguas y frutos se evaluó el nitrógeno total, fósforo total, metales, pH, conductividad eléctrica, coliformes totales y fecales. Los resultados demostraron que no hubo diferencias significativas entre los tratamientos con solución nutritiva elaborada con agua potable o agua residual; se obtuvo una calidad microbiológica y físico-química del fruto similar en ambos tratamientos. El tratamiento B presentó plantas achaparradas, con síntomas evidentes de deficiencias de nutrientes y ausencia de frutos, por lo que se concluye que las aguas residuales tratadas de este sistema son adecuadas para la elaboración de soluciones nutritivas para cultivos hidropónicos.