Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Grupo Verde de Agroecologia e Abelhas (GVAA)
2013-06-01
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| Series: | Revista Verde de Agroecologia e Desenvolvimento Sustentável |
| Online Access: | http://www.gvaa.com.br/revista/index.php/RVADS/article/view/2006 |
| _version_ | 1819057838136229888 |
|---|---|
| author | Lauriane Almeida Soares Geovani Soares Lima Reginaldo Gomes Nobre Hans Raj Gheyi Francisco Hevilásio Freire Pereira |
| author_facet | Lauriane Almeida Soares Geovani Soares Lima Reginaldo Gomes Nobre Hans Raj Gheyi Francisco Hevilásio Freire Pereira |
| author_sort | Lauriane Almeida Soares |
| collection | DOAJ |
| description | <!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><p class="Default" style="margin-top: 0in; margin-right: 42.45pt; margin-bottom: .0001pt; margin-left: 42.55pt; text-align: justify;"><span style="font-size: 10.0pt; font-family: 'Times New Roman','serif';">A utilização de águas de qualidade inferior na agricultura tornou-se uma necessidade em virtude da escassez hídrica que atinge diversas regiões do país; desse modo, objetivou-se com este trabalho estudar a fisiologia e o acúmulo de fitomassa pela mamoneira cv. BRS Energia, cultivada sob irrigação com água de distintos níveis salinos e doses de adubação nitrogenada, em experimento conduzido em lisímetros sob condições de campo no CCTA/UFCG. Usou-se a aleatorização em bloco, arranjados em esquema fatorial 5 x 4, referentes a cinco níveis de salinidade da água de irrigação - CEa (0,3; 1,2; 2,1; 3,0 e 3,9 dS m<sup>-1</sup>) e quatro doses de adubação nitrogenada (70, 100, 130 e 160% da dose indicada para ensaio) com três repetições. O estresse salino interfere negativamente sobre a condutância estomática e na fitomassa seca da parte aérea da cv. BRS Energia e níveis de condutividade elétrica da água de 0,3; 1,7 e 3,9 dS m<sup>-1</sup> respectivamente, proporcionam os maiores valores para fotossíntese líquida, concentração interna de CO<sub>2 </sub>e relação raiz/parte aérea. A irrigação com água de condutividade elétrica de até 3,9 dS m<sup>-1 </sup>não exercem influência negativa sobre a razão de área foliar e o teor de água na parte aérea da mamoneira. O suprimento com nitrogênio até a dose de 160% aumenta a taxa de fotossíntese líquida e a fitomassa seca da parte aérea. 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| first_indexed | 2024-12-21T13:45:40Z |
| format | Article |
| id | doaj.art-8e1fd7e8217b4311b25410f10e3f988a |
| institution | Directory Open Access Journal |
| issn | 1981-8203 |
| language | English |
| last_indexed | 2024-12-21T13:45:40Z |
| publishDate | 2013-06-01 |
| publisher | Grupo Verde de Agroecologia e Abelhas (GVAA) |
| record_format | Article |
| series | Revista Verde de Agroecologia e Desenvolvimento Sustentável |
| spelling | doaj.art-8e1fd7e8217b4311b25410f10e3f988a2022-12-21T19:01:54ZengGrupo Verde de Agroecologia e Abelhas (GVAA)Revista Verde de Agroecologia e Desenvolvimento Sustentável1981-82032013-06-01812472561327Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenadaLauriane Almeida Soares0Geovani Soares LimaReginaldo Gomes Nobre1Hans Raj Gheyi2Francisco Hevilásio Freire Pereira3UFCGUFCGUFRBUFCG<!--[if gte mso 9]><xml> <o:OfficeDocumentSettings> <o:RelyOnVML /> <o:AllowPNG /> </o:OfficeDocumentSettings> </xml><![endif]--><p class="Default" style="margin-top: 0in; margin-right: 42.45pt; margin-bottom: .0001pt; margin-left: 42.55pt; text-align: justify;"><span style="font-size: 10.0pt; font-family: 'Times New Roman','serif';">A utilização de águas de qualidade inferior na agricultura tornou-se uma necessidade em virtude da escassez hídrica que atinge diversas regiões do país; desse modo, objetivou-se com este trabalho estudar a fisiologia e o acúmulo de fitomassa pela mamoneira cv. BRS Energia, cultivada sob irrigação com água de distintos níveis salinos e doses de adubação nitrogenada, em experimento conduzido em lisímetros sob condições de campo no CCTA/UFCG. Usou-se a aleatorização em bloco, arranjados em esquema fatorial 5 x 4, referentes a cinco níveis de salinidade da água de irrigação - CEa (0,3; 1,2; 2,1; 3,0 e 3,9 dS m<sup>-1</sup>) e quatro doses de adubação nitrogenada (70, 100, 130 e 160% da dose indicada para ensaio) com três repetições. O estresse salino interfere negativamente sobre a condutância estomática e na fitomassa seca da parte aérea da cv. BRS Energia e níveis de condutividade elétrica da água de 0,3; 1,7 e 3,9 dS m<sup>-1</sup> respectivamente, proporcionam os maiores valores para fotossíntese líquida, concentração interna de CO<sub>2 </sub>e relação raiz/parte aérea. A irrigação com água de condutividade elétrica de até 3,9 dS m<sup>-1 </sup>não exercem influência negativa sobre a razão de área foliar e o teor de água na parte aérea da mamoneira. O suprimento com nitrogênio até a dose de 160% aumenta a taxa de fotossíntese líquida e a fitomassa seca da parte aérea. 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| spellingShingle | Lauriane Almeida Soares Geovani Soares Lima Reginaldo Gomes Nobre Hans Raj Gheyi Francisco Hevilásio Freire Pereira Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada Revista Verde de Agroecologia e Desenvolvimento Sustentável |
| title | Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada |
| title_full | Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada |
| title_fullStr | Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada |
| title_full_unstemmed | Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada |
| title_short | Fisiologia e acúmulo de fitomassa pela mamoneira submetida a estresse salino e adubação nitrogenada |
| title_sort | fisiologia e acumulo de fitomassa pela mamoneira submetida a estresse salino e adubacao nitrogenada |
| url | http://www.gvaa.com.br/revista/index.php/RVADS/article/view/2006 |
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