Efeito da irrigação com água salina em um solo cultivado com o feijoeiro (Phaseolus vulgaris L.)

Santana, Márcio José de; Carvalho, Jacinto de Assunção; Silva, Elio Lemos da; Miguel, Douglas da Silva

doi:10.1590/s1413-70542003000200027

Cited by 16 publications

(17 citation statements)

References 2 publications

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“…Water volumes periodically applied as a function of the type of drip system and water salinity Ayers & Westcot (1991) report that the presence of salts in the soil solution decreases the osmotic potential and retention forces, causing lack of water in the plant, i.e., the more saline the soil, the greater the energy spent by the plant to absorb water. Similar behavior was observed by Santana et al (2003), studying the effect of different salt concentrations in the irrigation water on common bean production. These authors found reductions of up to 69% in water consumption between plants subjected to 0.10 and 5.5 dS m -1 .…”

Section: Resultssupporting

confidence: 81%

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Yield of green beans subjected to continuous and pulse drip irrigation with saline water

Almeida

Paz

Jesus

et al. 2018

Rev. bras. eng. agríc. ambient.

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Palavras-chave:Phaseolus vulgaris vaso ambiente protegido eficiência do uso da água A B S T R A C TIn view of the imminent need for efficient water use and the search for adequate management techniques to reduce the effect of salinity on plants, a study was conducted to evaluate the effect of continuous and pulses drip irrigation with saline water on green bean yield and water use efficiency. The experiment was conducted in a greenhouse, in a completely randomized design, with treatments distributed in a 2 x 5 factorial arrangement. The first factor was type of drip irrigation, i.e., continuous or pulse, while the second factor was the levels of water salinity (electrical conductivity of 0.3, 1.5, 2.5, 3.5 and 4.5 dS m -1 ), with five replicates, and two plants per replicate, totaling 50 experimental units. The following variables were analysed: production of pods per pot, water use efficiency and the electrical conductivity of the soil saturation extract. According to the results, significant effect of the interaction and decreasing linear fits in response to salinity occurred for all variables studied. It was possible to note that pulse drip irrigation reduced the negative effects of irrigation water salinity on green bean yield and increased water use efficiency.Rendimento do feijão-vagem submetido ao gotejamento contínuo e por pulsos com água salina R E S U M O Em face à iminente necessidade do uso eficiente da água e a busca por técnicas de manejo adequado que possibilite reduzir o efeito da salinidade nas plantas, foi realizado um estudo para avaliar o efeito da aplicação de água salina através do gotejamento contínuo e por pulsos sobre a produção e a eficiência do uso da água na cultura do feijão-vagem. O experimento foi conduzido em casa-de-vegetação, com delineamento inteiramente casualizado, com tratamentos distribuídos em esquema fatorial 2 x 5, sendo o primeiro fator a aplicação por gotejamento contínuo e por pulsos; e o segundo, os níveis de salinidade da água (condutividade elétrica de 0,3; 1,5; 2,5; 3,5 e 4,5 dS m -1 ), com 5 repetições e duas plantas por repetição, totalizando 50 unidades experimentais. Analisaram-se as seguintes variáveis: produção de frutos por vaso, eficiência do uso da água e a condutividade elétrica do extrato de saturação do solo. Verificou-se efeito significativo da interação e ajuste linear decrescente da salinidade sobre todas as variáveis analisadas. Foi possível constatar que o gotejamento por pulsos reduziu os efeitos negativos da salinidade da água de irrigação no rendimento do feijão-vagem e aumentou a eficiência do uso da água.

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Section: Resultssupporting

confidence: 81%

“…As irrigation water salinity increased, ECse varied from 1.26 to 7.64 dS m -1 for continuous drip irrigation and from 1.46 to 8.60 dS m -1 for pulse drip irrigation. Increase in ECse resulting from irrigation with water of different salinity levels was also observed in common bean by Santana et al (2003).…”

Section: Resultsmentioning

confidence: 57%

Yield of green beans subjected to continuous and pulse drip irrigation with saline water

Almeida

Paz

Jesus

et al. 2018

Rev. bras. eng. agríc. ambient.

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“…Therefore, the increment of 40% in N and P led to higher water content in the leaves (RWC) and, consequently, lower WSD, regardless of the water salinity levels, compared with the other treatments. Plants in this treatment (140:140% P/N) managed to maintain a higher turgor potential in the leaf cells, probably due to the higher capacity of osmotic adjustment promoted by the synthesis of compatible osmolytes, such as amino acids and soluble sugars, stimulated by the increment of N and P, thus reducing the imbalance between transpiration and water absorption by plants (Santana et al, 2011), favoring the ionic homeostasis (Gupta & Huag, 2014). Note.…”

Section: Resultsmentioning

confidence: 99%

Water Relations and Gas Exchanges of West Indian Cherry under Salt Stress and Nitrogen and Phosphorus Doses

Sá¹,

Gheyi²,

Lima³

et al. 2017

JAS

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This study aimed to evaluate the interaction between the fertilization with nitrogen (N) and phosphorus (P) and irrigation with saline water on the water relations, gas exchanges and chlorophyll a fluorescence in West Indian cherry in the vegetative stage. The study was carried out in protected environment, using lysimeters filled with clay loam Regolithic Neosol, with low P content, installed in a randomized block design, arranged in a factorial scheme with five levels of electrical conductivity of irrigation water (ECw), and four managements of P and N fertilization, with three replicates and one plant per plot. Along the experiment, water relations, gas exchanges and chlorophyll a fluorescence were evaluated in West Indian cherry plants. The increase in irrigation water salinity reduces the gas exchanges of the plants, but the increment of 40% in N supply increases the photosynthetic activity of West Indian cherry at recommendation levels higher than 100:100% of the P/N ratio, when irrigated with ECw of up to 3.0 dS m

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“…In more severe cases, soil salinization leads to the collapse of agricultural production [2,3]. This is due to the rise in the osmotic potential of the soil solution by the toxic effects of specific ions and by the change in the physical and chemical conditions of the soil [4]. Approximately 30% of irrigated land is moderately or severely affected by salinization [5].…”

Section: Introductionmentioning

confidence: 99%

Laboratory Salinization of Brazilian Alluvial Soils and the Spectral Effects of Gypsum

2014

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Irrigation-induced salinization is an important land degradation process that affects crop yield in the Brazilian semi-arid region, and gypsum has been used as a corrective measure for saline soils. Fluvent soil samples (180) were treated with increasing levels of salinization of NaCl, MgCl 2 and CaCl 2 . The salinity was gauged using electrical conductivity (EC). Gypsum was added to one split of these samples before they were treated by the saline solutions. Laboratory reflectance spectra were measured at nadir under a controlled environment using a FieldSpec spectrometer, a 250-W halogen lamp and a Spectralon panel. Variations in spectral reflectance and brightness were evaluated using principal component analysis, as well as the continuum-removed absorption depths of major features at 1450, 1950, 1750 and 2200 nm for both the gypsum-treated (TG) and non-treated (NTG) air-dried soil samples as a function of EC. Pearson's correlation coefficients of reflectance and the band depth with EC were also obtained to establish the relationships with salinity. Results showed that NTG samples presented a decrease in reflectance and brightness with increasing CaCl 2 and MgCl 2 salinization. The reverse was observed for NaCl. Gypsum increased the spectral reflectance of the soil. The best negative correlations between reflectance and EC were observed in the 1500-2400 nm range for CaCl 2 and MgCl 2 , probably because these wavelengths are most affected by water absorption, as Ca and Mg are much more hygroscopic than Na. These decreased after chemical treatment with gypsum. The most prominent features were observed at 1450, OPEN ACCESSRemote Sens. 2014, 6 2648 1950 and 1750 nm in salinized-soil spectra. The 2200-nm clay mineral absorption band depth was inversely correlated with salt concentration. From these features, only the 1750 and 2200 nm ones are within atmospheric absorption windows and can be more easily measured using hyperspectral sensors.

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Efeito da irrigação com água salina em um solo cultivado com o feijoeiro (Phaseolus vulgaris L.)

Cited by 16 publications

References 2 publications

Yield of green beans subjected to continuous and pulse drip irrigation with saline water

Yield of green beans subjected to continuous and pulse drip irrigation with saline water

Water Relations and Gas Exchanges of West Indian Cherry under Salt Stress and Nitrogen and Phosphorus Doses

Laboratory Salinization of Brazilian Alluvial Soils and the Spectral Effects of Gypsum

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