Partição de Biomassa do Feijão-Caupi Irrigado com Água Salina e Adubação Nitrogenada

Furtado, G.F.; Lima, Giuseppe; Sousa, Jônatas Raulino Marques de; Soares, L.A.A.; Andrade, Elysson Marcks Gonçalves; Costa, W.M.

doi:10.12702/ii.inovagri.2014-a031

Cited by 2 publications

(2 citation statements)

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“…Corroborating the results of the present study, Soares et al (2013) and Furtado et al (2013) observed a reduction in the instantaneous carboxylation efficiency in cowpea plants under salt stress. Rodrigues et al (2014) observed reduction in the instantaneous carboxylation efficiency with the increase of the saline concentration in castor bean plants.…”

Section: Resultssupporting

confidence: 91%

Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water

Oliveira

Souza

Cunha

et al. 2017

Rev. bras. eng. agríc. ambient.

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A B S T R A C TLeaf gas exchanges in plants and soil respiration are important tools for assessing the effects of salinity on the soil-plant system. An experiment was conducted with cowpea irrigated with saline water (0, 2.5, 5.0, 7.5, 10.0 and 12.5 dS m -1 ) prepared with two sources: NaCl and a mixture of Ca, Mg, Na, K and Cl ions in a randomized block design and a 6 x 2 factorial scheme, with four replicates, totaling 48 experimental plots. At 20 days after planting (DAP), plants were evaluated for net photosynthesis (A), stomatal conductance (gs) and transpiration (E) using the Infra-Red Gas Analyzer (Model XT6400-LICOR), and water use efficiency, intrinsic water use efficiency and instantaneous efficiency of carboxylation were calculated. At 60 DAP, the soil CO 2 efflux (soil respiration) was determined with a camera (Model 6400-09-LICOR). Salinity caused reductions in A, gs and E. However, the salt source did not have significant effect on these variables. Soil CO 2 efflux was reduced with the increase in the electrical conductivity, especially in the mixture of ions.Trocas gasosas em feijão-caupi e efluxo de CO 2 do solo irrigado com água salina R E S U M O As trocas gasosas em plantas e a respiração do solo são ferramentas importantes para avaliar os efeitos da salinidade no sistema solo-planta. Com este propósito conduziu-se um experimento com feijão-caupi irrigado com seis níveis de condutividade elétrica (0; 2,5; 5,0; 7,5; 10,0 e 12,5 dS m -1 ) elaborados com duas fontes: NaCl e uma mistura de íons de Ca, Mg, Na, K e Cl, em blocos ao acaso e arranjo fatorial 6 x 2, com 4 repetições totalizando 48 parcelas; aos 20 dias após o plantio (DAP) foram determinadas fotossíntese líquida (A), condutância estomática (gs) e transpiração (E) com o Infra-Red Gas Analyzer (Modelo XT6400-Licor) e se calcularam a eficiência do uso da água, a eficiência intrínseca do uso da água e a eficiência instantânea de carboxilação; aos 60 DAP determinou-se o efluxo de CO 2 (respiração do solo) com uma câmara de solo (Modelo 6400-09-LICOR). Observaram-se reduções de A, gs e E com o aumento da salinidade; entretanto, a fonte de sal não apresentou efeito significativo para tais variáveis; já para a respiração do solo ocorreu redução com o aumento da condutividade elétrica da água de irrigação sendo mais pronunciado quando se utilizou somente a mistura de sais.

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Section: Resultssupporting

confidence: 91%

Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water

Oliveira

Souza

Cunha

et al. 2017

Rev. bras. eng. agríc. ambient.

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“…The doses of potassium and the interaction The instantaneous water use effi ciency (Figure 5A) in plants grown under saline stress during the fl owering stage (FL) was lower than those that received water at a lower level of salinity (1.3 dS m -1 ) throughout the growth cycle (WS), and ECw of 4.0 dS m -1 during the VE, FR, VE/FL, and VE/FR stages. The WUEi relates the amount of carbon that the plant fi xes to each unit of water that is lost during the process of photosynthesis (SILVA et al, 2015); as such, better instantaneous water use efficiency ensures greater CO 2 absorption with a minimum of water loss (FURTADO et al, 2013).…”

Section: Resultsmentioning

confidence: 99%

Gas exchange and yellow passion fruit production under irrigation strategies using brackish water and potassium

Pinheiro

Lima

Gheyi

et al. 2022

Revista Ciência Agronômica

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The occ urrence of water sources with high concentrations of salts is a common problem in the semi-arid region of north-eastern Brazil. The search for management strategies that can minimize the effect of salt stress on crops is therefore extremely important. As such, this study aimed to evaluate gas exchange and production in the yellow passion fruit 'BRS GA1'as a function of irrigation strategies using brackish water and doses of potassium. The research was carried out under fi eld conditions in São Domingos, in the state of Paraíba, Brazil, using a randomized block design in a 6 × 2 factorial scheme, with treatments comprising six irrigation strategies using water (irrigat ion with low-salinity water throughout the cycle -WS; irrigation with high-salinity water during the vegetative stage -VE; during the fl owering stage -FL; the fruiting stage -FR; during successive vegetative/fl owering stages -VE/FL; successive vegetative/fruiting stages -VE/FR) and two doses of potassium (60% and 100% of the recommended dose of 345 g K 2 O per plant per year), with four replications and three plants per plot. Two levels of water salinity (1.3 and 4.0 dS m -1 ) were used during different phenological stages of the crop. Irrigation with water at 4.0 dS m -1 reduced the leaf water potential, leaf osmotic potential, stomatal conductance, transpiration, and rate of CO 2 assimilation of the yellow passion fruit, regardless of the irrigation strategy. The continuous salt stress during the vegetative and fl owering stages compromised production in the yellow passion fruit.

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Partição de Biomassa do Feijão-Caupi Irrigado com Água Salina e Adubação Nitrogenada

Cited by 2 publications

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Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water

Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water

Gas exchange and yellow passion fruit production under irrigation strategies using brackish water and potassium

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