Recuperação de um solo salinizado após cultivo em ambiente protegido

Blanco, Flávio Favaro; Folegatti, Marcos Vinícius

doi:10.1590/s1415-43662001000100014

Cited by 10 publications

(6 citation statements)

References 3 publications

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“…Although high, the values of soil electrical conductivity in the treatments with leaching are significantly lower for any irrigation water used and express the positive effects of the drainage on the leaching of salts from the root zone. The results, in both situations, agree with those obtained by Blanco & Folegatti (2001) and Nunes et al (2012), who observed that leaching reduces salt content in the soil, while the increment in water salinity increases the saline character of the soils.…”

Section: Resultssupporting

confidence: 91%

Photosynthetic pigments and biomass in noni irrigated with saline waters with and without leaching

Souto

Cavalcante

Gheyi

et al. 2015

Rev. bras. eng. agríc. ambient.

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The response of plants to salt stress is an extremely complex phenomenon that involves morphological, physiological and biochemical changes, modifying the leaf contents of chlorophyll and carotenoids, among others and affecting plant growth, development and production. An experiment was carried out from July 2010 to June 2011, in order to evaluate the contents of chlorophyll a, chlorophyll b, total chlorophyll, carotenoids, the chlorophyll a/b ratio and biomass accumulation of shoots and roots of noni plants, when subjected to irrigation and leaching with water of increasing salinity. The experiment was carried out in a greenhouse, at the Center of Agricultural Sciences of the Federal University of Paraíba, in the municipality of Areia-PB, Brazil. Treatments were distributed in randomized blocks, in a 5 × 2 factorial scheme with four replicates and two plants per plot, and corresponded to levels of electrical conductivity of irrigation water (0.5; 1.5; 3.0; 4.5 and 6.0 dS m-1) in pots with and without leaching. The increase in irrigation water salinity impairs the leaf contents of chlorophyll a, b, total chlorophyll, carotenoids and biomass production of noni plants, but to a lesser extent in all the treatments in which same irrigation water was used for leaching.

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Section: Resultssupporting

confidence: 91%

Photosynthetic pigments and biomass in noni irrigated with saline waters with and without leaching

Souto

Cavalcante

Gheyi

et al. 2015

Rev. bras. eng. agríc. ambient.

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“…Este método se mostrou eficiente para recuperação de solos afetados por sais, entretanto se faz necessário ajuste para se ter resultados mais satisfatórios. Blanco & Folegatti (2001), verificaram que a lavagem de recuperação de um solo salinizado, utilizando-se um sistema de irrigação por gotejamento, após um cultivo em ambiente protegido proporcionou maior redução da salinidade apenas na região próxima ao gotejador, dentro do bulbo molhado.…”

Section: Resultsunclassified

“…De acordo com Blanco & Folegatti (2001), em cultivos protegidos, como o método de irrigação mais utilizado é o gotejamento, é mais vantajoso realizar-se a recuperação do solo salinizado pelo próprio sistema de irrigação, uma vez que este já se encontra instalado na área. Portanto, caso não haja revolvimento do solo após um cultivo, a recuperação pode ser realizada por gotejamento, desde que o plantio da cultura subseqüente seja realizado dentro da região do bulbo molhado do cultivo anterior, onde a redução da salinidade pela lavagem é satisfatória.…”

Section: Introductionunclassified

Recuperação De Um Solo Salinizado Devido a Excesso De Fertilizantes Em Ambiente Protegido.

Duarte¹,

Dias²,

Filho³

2007

R_I

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RECUPERAÇÃO DE UM SOLO SALINIZADO DEVIDO A EXCESSO DE FERTILIZANTES EM AMBIENTE PROTEGIDO. Sergio Nascimento Duarte1; Nildo da Silva Dias2; José Francisco Teles Filho11Departamento de Engenharia Rural, Escola Superior de Agricultura Luiz de Queiroz, Universidade de São Paulo, Piracicaba, SP, snduarte@esalq.usp.br2Departamento de Engenharia Ambiental, Universidade Federal Rural do Semi-Árido, Mossoró, RN 1 RESUMO O aumento da salinidade em ambientes protegidos da região Sudeste do Brasil dá-se, geralmente, em função do excesso de fertilizantes aplicados via água de irrigação; portanto, é necessário que medidas preventivas e corretivas sejam tomadas, pois o uso intensivo de adubação, a falta de chuvas e a contínua evaporação da água do solo podem aumentar o teor de sais na solução do solo. Assim, o objetivo deste trabalho foi avaliar a viabilidade da utilização da fórmula de Hoffman (1980) para o cálculo da lâmina de lavagem de recuperação de solos salinos. O experimento foi desenvolvido em duas estufas plásticas na área experimental do Departamento de Engenharia Rural da Escola Superior de Agricultura “Luiz de Queiroz”, Piracicaba, SP. O estudo foi feito aproveitando-se de um experimento anterior em que o solo das parcelas experimentais passou por um processo de salinização artificial mediante adição de fertilizantes. Foram utilizadas 20 parcelas experimentais com salinidade inicial da camada de 0-40 cm entre 2 e 6 dS m-1, avaliados previamente por meios da medição da CEes. Procurou-se aplicar lâminas de lavagem, calculadas individualmente para cada nível da salinidade, com o intuito de abaixar a concentração de sais da solução do solo para níveis próximos a 1 dS m-1. Os resultados obtidos revelaram que a lâmina de lavagem foi subestimada, havendo a necessidade de se aplicar um maior volume de água. UNITERMOS: salinidade, lixiviação, condutividade elétrica. DUARTE, S. N.; DIAS, N. da S.; TELES FILHO. J. F. RECOVERY OF A SALINIZED SOIL DUE TO EXCESS OF FERTILIZERS UNDER GREENHOUSE CONDITIONS 2 ABSTRACT The increase of the salinity in greenhouses of the Southeastern region of Brazilusually occur because of the overapplication of fertilizers in irrigation water; therefore, preventive and corrective actions are necessary. Manure overuse, lack of rains and continuous soil water evaporation can increase salt concentration in a soil solution. The aim of this work was evaluate the use viability of the Hoffman’s formula (1980) on calculation of leaching depthes necessary for recovery of salinized soil. The experiment was carried out in two greenhouses located in the experimental area of the Department of Rural Engineering of the Escola Superior de Agricultura “Luiz de Queiroz” - USP, in Piracicaba, State of São Paulo, Brazil. The study took advantage of a previous experiment, in which the experimental parcel soil was submitted to a process of artificial salinization by fertilizer addition. Twenty experimental parcels were used and had initial salinity of the 0-40 cmlayer, between 2 and 6 dS m-1, previously evaluated by the measurement electric conductivity of the saturation extract. The depth of leaching water was calculated for each salinity level, in order to lower the concentration salts in the soil solution for levels close to 1 dS m-1. The results showed that Hoffman’s formula underestimated the water depth and, thus, it was necessary to apply more water to completely recover the salinized soil. KEYWORDS: salinity, leaching, electric conductivity.

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“…The storage of water for these layers was similar. According to Blanco and Folegatti (2001), the movement of salts in the soil is slower than water movement and consequently their concentration is distributed more heterogeneously in the soil profile. According to the values of storage for both treatments in layers V and VI, it is possible to note that there was more movement of nutrients (through the soil profile) when using the flow of 2 L h -1 .…”

Section: Soil Solution Storagementioning

confidence: 99%

Soil Solution Dynamics for Drip Fertigation Management in Bell Pepper Crop

Santoro¹,

Pires²,

Peres³

et al. 2018

R_I

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The success of drip irrigation compared to various other irrigation systems is attributed primarily to its superior water delivery to plant root zones and high efficiency in water use. This work aimed at studying the distribution and storage of soil solution in the soil profile, and the uptake of nutrients through the roots of pepper plants, irrigated through a drip fertigation system at two flow rates, 2 and 4 L h -1 . The experiment was conducted within a greenhouse with plants grown in a medium-textured Oxisol for 120 days. Water and ionic concentration were concurrently measured using TDR probes in the soil profile (at depths ranging from 0.1 to 0.6 m). The root system of plants irrigated with drippers of 4 L h -1 had an area of 69.3 cm 2 while plants irrigated with drippers of 2 L h -1 presented an area of 45.2 cm 2 . The yield of pepper plants were 0.19 kg m -2 and 0.27 kg m -2 for treatments with 2 L h -1 and 4 L h -1 , respectively, supporting the results obtained for nutrients distribution and root development. There was higher tendency for nutrient loss in the treatment with 2 L h -1 , increasing risks of groundwater contamination. The dripper with flow rate of 4 L h -1 was more efficient at distributing and storing water and nutrients in the soil profile, which improved the crop yield. RESUMOA irrigação por gotejamento possibilita a aplicação de água e nutrientes na região das raízes da planta e tem contribuído para obtenção de elevada eficiência no consumo da água e dos nutrientes. Essa vantagem tem contribuído pelo aumento no interesse na adoção deste método de irrigação em relação a outros, no entanto, adequado manejo da água e dos nutrientes deve ser adotado. Neste contexto, o objetivo foi avaliar a distribuição e armazenamento de solução do solo e a absorção de nutrientes de raízes de plantas de pimentão aplicados por fertirrigação em irrigação por gotejamento com emissores com vazões distintas, 2 e 4 L h -1 . O experimento

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Recuperação de um solo salinizado após cultivo em ambiente protegido

Cited by 10 publications

References 3 publications

Photosynthetic pigments and biomass in noni irrigated with saline waters with and without leaching

Photosynthetic pigments and biomass in noni irrigated with saline waters with and without leaching

Recuperação De Um Solo Salinizado Devido a Excesso De Fertilizantes Em Ambiente Protegido.

Soil Solution Dynamics for Drip Fertigation Management in Bell Pepper Crop

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