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| Oliveira,Alexsandra Duarte de; Ribeiro,Fabiana Piontekowski; Ferreira,Eloisa Aparecida Belleza; Malaquias,Juaci Vitoria; Gatto,Alcides; Zuim,Diana Regazzi; Pinheiro,Luciano de Almeida; Pulrolnik,Karina; Soares,João Paulo Guimarães; Carvalho,Arminda Moreira de. |
| ABSTRACT Forest soils are N2O sources and commonly act as CH4 sinks. This study evaluated the dynamics of the CH4 and N2O fluxes of soils under Eucalyptus plantations and native Cerrado vegetation, as well as possible interactions between environmental factors and fluxes. The study was carried out in the Distrito Federal, Brazil, during 26 months, in three areas: in two stands of the hybrid Eucalyptus urophylla × Eucalyptus grandis, planted in 2011 (E1), and in 2009 (E2) and native Cerrado vegetation (CE). Measurements to determine the fluxes in a closed static chamber were carried out from Oct 2013 to Nov 2015. Soil and climate factors were monitored. During the study period, the mean CH4 fluxes were –22.48, –8.38 and –1.31 μg CH4 m–2 h–1 and the mean N2O... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Eucalyptus; Greenhouse gases; Forest stand age; Savanna. |
| Ano: 2021 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162021000100302 |
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| Borges,Valéria Peixoto; Silva,Bernardo Barbosa da; Espínola Sobrinho,José; Ferreira,Rafael da Costa; Oliveira,Alexsandra Duarte de; Medeiros,José Francismar de. |
| Melon plants (Cucumis melo L.) are grown in the state of Rio Grande do Norte (RN), the largest producer of melons in Brazil, with plastic mulch and agrotextiles. Studies of crop evapotranspiration (ET) under these conditions are required to ensure adequate irrigation. This study aimed to determine the crop coefficients (Kc) of irrigated melon plants grown with mulch and agrotextiles in the region of Mossoró, RN, based on the Bowen Ratio Energy Balance (BREB) method. Two experiments were conducted at different times during the 2009/2010 season in a melon producing area (4°59'52" S, 37°23'09" W, and 54 m elevation) to define ET and Kc. Due to the plastic cover and reduced precipitation during the experiments, the Kc obtained by the BREB method was considered... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cucumis melo (L.); Bowen Ratio; Crop coefficients. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162015000500385 |
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