Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water
ABSTRACT Leaf 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...
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Universidade Federal de Campina Grande
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| Series: | Revista Brasileira de Engenharia Agrícola e Ambiental |
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| author | Wanderson J. de Oliveira Edivan R. de Souza Jailson C. Cunha Ênio F. de F. e Silva Venâncio de L. Veloso |
| author_facet | Wanderson J. de Oliveira Edivan R. de Souza Jailson C. Cunha Ênio F. de F. e Silva Venâncio de L. Veloso |
| author_sort | Wanderson J. de Oliveira |
| collection | DOAJ |
| description | ABSTRACT Leaf 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 CO2 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 CO2 efflux was reduced with the increase in the electrical conductivity, especially in the mixture of ions. |
| format | Article |
| id | doaj-art-dbbd110bc2934ed986516b73a606e63b |
| institution | OA Journals |
| issn | 1807-1929 |
| language | English |
| publisher | Universidade Federal de Campina Grande |
| record_format | Article |
| series | Revista Brasileira de Engenharia Agrícola e Ambiental |
| spelling | doaj-art-dbbd110bc2934ed986516b73a606e63b2025-08-20T02:04:24ZengUniversidade Federal de Campina GrandeRevista Brasileira de Engenharia Agrícola e Ambiental1807-1929211323710.1590/1807-1929/agriambi.v21n1p32-37S1415-43662017000100032Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline waterWanderson J. de OliveiraEdivan R. de SouzaJailson C. CunhaÊnio F. de F. e SilvaVenâncio de L. VelosoABSTRACT Leaf 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 CO2 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 CO2 efflux was reduced with the increase in the electrical conductivity, especially in the mixture of ions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100032&lng=en&tlng=enfotossíntesesalinidadeestresse salinorespiração do solo |
| spellingShingle | Wanderson J. de Oliveira Edivan R. de Souza Jailson C. Cunha Ênio F. de F. e Silva Venâncio de L. Veloso Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water Revista Brasileira de Engenharia Agrícola e Ambiental fotossíntese salinidade estresse salino respiração do solo |
| title | Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water |
| title_full | Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water |
| title_fullStr | Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water |
| title_full_unstemmed | Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water |
| title_short | Leaf gas exchange in cowpea and CO2 efflux in soil irrigated with saline water |
| title_sort | leaf gas exchange in cowpea and co2 efflux in soil irrigated with saline water |
| topic | fotossíntese salinidade estresse salino respiração do solo |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662017000100032&lng=en&tlng=en |
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