Gas exchange in maize as a function of aeration porosity in a cohesive soil
ABSTRACT Due to their physical characteristics, cohesive soils of either low or high aeration porosity can intensify limitations on plant cultivation. With the hypothesis that moist cohesive horizons where the soil has not yet reached a hard to extremely hard consistency may present a level of aerat...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Ceará
2021-08-01
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| Series: | Revista Ciência Agronômica |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000200416&tlng=en |
| _version_ | 1818903956193017856 |
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| author | Edilaine da Silva Marques Jaedson Cláudio Anunciato Mota Claudivan Feitosa de Lacerda Francisca Gleiciane da Silva Ricardo Espíndola Romero |
| author_facet | Edilaine da Silva Marques Jaedson Cláudio Anunciato Mota Claudivan Feitosa de Lacerda Francisca Gleiciane da Silva Ricardo Espíndola Romero |
| author_sort | Edilaine da Silva Marques |
| collection | DOAJ |
| description | ABSTRACT Due to their physical characteristics, cohesive soils of either low or high aeration porosity can intensify limitations on plant cultivation. With the hypothesis that moist cohesive horizons where the soil has not yet reached a hard to extremely hard consistency may present a level of aeration porosity that affects gas exchange in maize plants, the aim of this study was to understand the influence of a cohesive horizon at different levels of aeration porosity on gas exchange in maize. The experiment was conducted in Fortaleza in the state of Ceará in a screened and covered environment, in a completely randomised block design with five levels of aeration porosity (AP) (0.04, 0.06, 0.09, 0.11 and 0.13 m3 m-3) and six replications, giving a total of 30 experimental units. The variables under analysis were intrinsic permeability (Kar) and gas exchange. Increases in AP afforded an increase in Kar. The AP of 0.04 and 0.13 m3 m-3 reflected in lower values for the photosynthetic rate (A) (24.54 and 25.50 µmol CO2 m2 s-1 respectively) and internal CO2 concentration (140.72 and 118.66 µmol mol-1 respectively). With the increase in AP, stomatal conductance and transpiration were reduced by 18% and 13.6% respectively, while the increase in intrinsic carboxylation efficiency was 19%, and intrinsic water use efficiency, 21%. It was concluded that variations in aeration porosity in cohesive soils affected gas exchange in maize plants. The AP of 0.04 and 0.13 m3 m-3 reduced the value of A due to non-stomatal and stomatal limitations respectively. |
| first_indexed | 2024-12-19T20:59:47Z |
| format | Article |
| id | doaj.art-80cfb5bd34e14c788ca3713e5af8cbc6 |
| institution | Directory Open Access Journal |
| issn | 1806-6690 |
| language | English |
| last_indexed | 2024-12-19T20:59:47Z |
| publishDate | 2021-08-01 |
| publisher | Universidade Federal do Ceará |
| record_format | Article |
| series | Revista Ciência Agronômica |
| spelling | doaj.art-80cfb5bd34e14c788ca3713e5af8cbc62022-12-21T20:05:50ZengUniversidade Federal do CearáRevista Ciência Agronômica1806-66902021-08-0152210.5935/1806-6690.20210035Gas exchange in maize as a function of aeration porosity in a cohesive soilEdilaine da Silva Marqueshttps://orcid.org/0000-0002-1535-4827Jaedson Cláudio Anunciato Motahttps://orcid.org/0000-0002-1261-9754Claudivan Feitosa de Lacerdahttps://orcid.org/0000-0002-5324-8195Francisca Gleiciane da Silvahttps://orcid.org/0000-0002-9216-3151Ricardo Espíndola Romerohttps://orcid.org/0000-0001-8689-1390ABSTRACT Due to their physical characteristics, cohesive soils of either low or high aeration porosity can intensify limitations on plant cultivation. With the hypothesis that moist cohesive horizons where the soil has not yet reached a hard to extremely hard consistency may present a level of aeration porosity that affects gas exchange in maize plants, the aim of this study was to understand the influence of a cohesive horizon at different levels of aeration porosity on gas exchange in maize. The experiment was conducted in Fortaleza in the state of Ceará in a screened and covered environment, in a completely randomised block design with five levels of aeration porosity (AP) (0.04, 0.06, 0.09, 0.11 and 0.13 m3 m-3) and six replications, giving a total of 30 experimental units. The variables under analysis were intrinsic permeability (Kar) and gas exchange. Increases in AP afforded an increase in Kar. The AP of 0.04 and 0.13 m3 m-3 reflected in lower values for the photosynthetic rate (A) (24.54 and 25.50 µmol CO2 m2 s-1 respectively) and internal CO2 concentration (140.72 and 118.66 µmol mol-1 respectively). With the increase in AP, stomatal conductance and transpiration were reduced by 18% and 13.6% respectively, while the increase in intrinsic carboxylation efficiency was 19%, and intrinsic water use efficiency, 21%. It was concluded that variations in aeration porosity in cohesive soils affected gas exchange in maize plants. The AP of 0.04 and 0.13 m3 m-3 reduced the value of A due to non-stomatal and stomatal limitations respectively.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000200416&tlng=enCohesionHypoxiaStomatal limitationNon-stomatal limitations |
| spellingShingle | Edilaine da Silva Marques Jaedson Cláudio Anunciato Mota Claudivan Feitosa de Lacerda Francisca Gleiciane da Silva Ricardo Espíndola Romero Gas exchange in maize as a function of aeration porosity in a cohesive soil Revista Ciência Agronômica Cohesion Hypoxia Stomatal limitation Non-stomatal limitations |
| title | Gas exchange in maize as a function of aeration porosity in a cohesive soil |
| title_full | Gas exchange in maize as a function of aeration porosity in a cohesive soil |
| title_fullStr | Gas exchange in maize as a function of aeration porosity in a cohesive soil |
| title_full_unstemmed | Gas exchange in maize as a function of aeration porosity in a cohesive soil |
| title_short | Gas exchange in maize as a function of aeration porosity in a cohesive soil |
| title_sort | gas exchange in maize as a function of aeration porosity in a cohesive soil |
| topic | Cohesion Hypoxia Stomatal limitation Non-stomatal limitations |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902021000200416&tlng=en |
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