Evolução da salinidade e pH de solo sob cultivo de melão irrigado com água salina

Filho, Francisco de Queiroz Porto; Medeiros, José Francismar de; Gheyi, Hans Raj; Dias, Nildo da Silva; Sousa, Paulo Sérgio de Araújo; Dantas, Daniel da C.

doi:10.1590/s1415-43662011001100004

Cited by 18 publications

(9 citation statements)

References 12 publications

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“…The use of brackish water in arid and semi-arid regions is increasing due to the increasing food demand by a growing population and declines in the current and future supply of freshwater [1][2][3]. However, the increasing use of brackish water in irrigated agriculture and the potential for inadequate drainage lead to salinization due to the low rainfall and high evaporation rate [4,5]. Under these conditions, the soils gradually accumulate soluble salts and alter the physical properties of the soil in the root zone, eventually reducing the potential yield of crops [6].…”

Section: Introductionmentioning

confidence: 99%

Reclaiming Tropical Saline-Sodic Soils with Gypsum and Cow Manure

Filho

Dias

Suddarth

et al. 2019

Water

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Saline-sodic soils are a major impediment for agricultural production in semi-arid regions. Salinity and sodicity drastically reduce agricultural crop yields, damage farm equipment, jeopardize food security, and render soils unusable for agriculture. However, many farmers in developing semi-arid regions cannot afford expensive amendments to reclaim saline-sodic soils. Furthermore, existing research does not cover soil types (e.g., Luvisols and Lixisols) that are found in many semi-arid regions of South America. Therefore, we used percolation columns to evaluate the effect of inexpensive chemical and organic amendments (gypsum and cow manure) on the reclamation of saline-sodic soils in the northeast of Brazil. Soil samples from two layers (0–20 cm and 20–40 cm in depth) were collected and placed in percolation columns. Then, we applied gypsum into the columns, with and without cow manure. The experiment followed a complete randomized design with three replications. The chemical amendment treatments included a control and four combinations of gypsum and cow manure. Percolation columns were subjected to a constant flood layer of 55 mm. We evaluated the effectiveness of sodic soil reclamation treatments via changes in soil hydraulic conductivity, chemical composition (cations and anions), electrical conductivity of the saturated soil-paste extract, pH, and the exchangeable sodium percentage. These results suggest that the combined use of gypsum and cow manure is better to reduce soil sodicity, improve soil chemical properties, and increase water infiltration than gypsum alone. Cow manure at 40 ton ha−1 was better than at 80 ton ha−1 to reduce the sodium adsorption ratio.

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Section: Introductionmentioning

confidence: 99%

Reclaiming Tropical Saline-Sodic Soils with Gypsum and Cow Manure

Filho

Dias

Suddarth

et al. 2019

Water

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“…In the irrigated crops of this region, due to the low cost it has been common the replacement of non-saline water by brackish water of the shallow wells. The waters of the limestone aquifer present relatively high concentrations of salts, being able to be superior to 3.0 dS m -1 (Sousa et al, 2009), being indispensable investigations on the rational use of these waters, since their inadequate use can salinize the soils (Porto Filho et al, 2011), aggravating the problems of desertification.…”

Section: Introductionmentioning

confidence: 99%

Biomass, Protein Content and Cell Damage in Tanzania Grass Irrigated With Saline Water

Dias¹,

Neto²,

Sá³

et al. 2019

JAS

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The scarcity of good water quality in semiarid region, combined with the high cost of pumping, has been the main limiting factor for increasing the irrigated area. The use of saline water for irrigation is a very common in semiarid zones, which can result in the soil salinization if irrigation management is not appropriated. To evaluate the biomass production, biochemical components and water consumption of Tanzania grass (Panicum maximum) irrigated with water salinity (1.5, 3.0, 4.5 and 6.0 dS m-1) an experiment in greenhouse was carried out in the Universidade Federal Rural do Semi-Árido, Mossoró, Rio Grande do Norte State, Brazil. The variables dry matter, crude protein, ashes, cellular damage on leaves and consume water in the first and second cut of the grass were analyzed under completely randomized design with five treatments and six replications. Salinity water up to 6.0 dS m-1 can be used for irrigation of Tanzania grass plants, with small yield losses. Increased salinity reduces water consumption and increases the water use efficiency of Tanzania grass. Tanzania grass plants have increased protein content when subjected to saline stress, which is a mechanism of action to osmotic adjustment and allows the reduction of plant leaf damage in the second cycle.

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“…Desse modo, a alta demanda atmosférica exige o uso da irrigação para garantia de sobrevivência e manutenção da produtividade da cultura, todavia, deve-se usar de águas salinas (água de poços rasos), visando o aumento da água disponível, o que pode ocasionar distúrbios no crescimento e desenvolvimento das plantas, já que o uso de água com condutividade elétrica superior ao limiar das culturas tende a reduzir o potencial hídrico de água no solo e exercer efeitos negativos por íons específicos, isto é, efeitos de ordem iônica, limitando o desenvolvimento e produtividade das plantas, como tem sido observado por vários autores (Shannon, 1978;Queiroga et al, 2006;Medeiros et al, 2007;Neves et al, 2009;Porto Filho et al, 2011;Dias et al, 2011;Sá et al, 2013 Medeiros et al, 2007;Munns e Tester, 2008;Al-Karakiet al, 2009;Sá et al, 2013;Brito et al, 2014).…”

Section: Introductionunclassified

Initial growth and tolerance of melon cultivars under salt stress

Araújo¹,

Sá²,

Oliveira³

et al. 2016

Rev. ambiente água

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RESUMOO cultivo do meloeiro é desenvolvido, principalmente, em áreas de clima semiárido, onde a limitação hídrica é o principal fator de estresse, sendo necessária a utilização de águas de qualidade inferior, principalmente as salinas para o aumento da água disponível, o que pode prejudicar o crescimento e a produção das plantas, contudo, o uso de genótipos tolerantes pode amenizar este problema. Com isso, objetivou-se estudar a emergência, o crescimento inicial e a tolerância de cultivares de meloeiro irrigado com águas de diferentes salinidades. O experimento foi desenvolvido em ambiente protegido da Universidade Federal de Campina Grande -UFCG, Campus de Pombal, Paraíba. Estudaram-se três cultivares de meloeiro (Gaúcho Redondo, Gaúcho Casca de Carvalho e Halles Best Jumbo) sob irrigação com águas com cinco níveis diferentes de salinidade (0,6; 1,2; 1,8, 2,4 e 3,0 dS m -1 ), perfazendo um esquema fatorial, 3 x 5, sendo os tratamentos resultantes distribuídos em um delineamento experimental de blocos ao acaso, com quatro repetições. As plantas foram monitoradas por 30 dias após a semeadura, e aos 30 dias, avaliou-se o crescimento e o índice de tolerância à salinidade. A cultivar Halles Best Jumbo é a mais tolerante à salinidade da água na fase inicial de crescimento, enquanto que a cultivar Gaúcho redondo é mais sensível à salinidade da água. Águas salinas de até 1,8 dS m -1 são indicadas para irrigação da plantas de meloeiro Gaúcho redondo e águas de até 2,4 dS m -1 podem ser utilizadas para irrigação das cultivares Gaúcho Casca de Carvalho e Halles Best Jumbo durante a fase inicial de crescimento.Palavras-chave: Cucumis melo L., irrigação, salinidade.

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Evolução da salinidade e pH de solo sob cultivo de melão irrigado com água salina

Cited by 18 publications

References 12 publications

Reclaiming Tropical Saline-Sodic Soils with Gypsum and Cow Manure

Reclaiming Tropical Saline-Sodic Soils with Gypsum and Cow Manure

Biomass, Protein Content and Cell Damage in Tanzania Grass Irrigated With Saline Water

Initial growth and tolerance of melon cultivars under salt stress

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