Photochemical activity modulated by water, nitrogen, and phosphorus status in cactus pear
| Autor: | Marcos Neves Lopes, Gil Mario Ferreira Gomes, Theyson Duarte Maranhão, Walisson Marques Silveira, Roberto Cláudio Fernandes Franco Pompeu, Rodrigo Gregório da Silva, Marlos Alves Bezerra, Magno José Duarte Cândido |
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| Přispěvatelé: | MARCOS NEVES LOPES, Instituto Federal de Educação, Ciência e Tecnologia do Piauí (IFPI) - Valença do Piauí, PI, Brasil, GIL MARIO FERREIRA GOMES, Instituto Federal de Educação, Ciência e Tecnologia do Piauí (IFPI) - Paulistana, PI, Brasil, THEYSON DUARTE MARANHÃO, Universidade de São Paulo (USP), Escola Superior de Agricultura 'Luiz de Queiroz' (ESALQ) - Piracicaba, SP, Brasil, WALISSON MARQUES SILVEIRA, Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brasil, ROBERTO CLAUDIO FERNANDES F POMPEU, CNPC, RODRIGO GREGÓRIO DA SILVA, Instituto Federal de Educação, Ciência e Tecnologia do Ceará (IFCE) - Limoeiro do Norte, CE, Brasil, MARLOS ALVES BEZERRA, CNPAT, MAGNO JOSÉ DUARTE CÂNDIDO, Universidade Federal do Ceará (UFC) - Fortaleza, CE, Brasil. |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Opuntia ficus-indica
Water stress Randomized block design chemistry.chemical_element Photochemistry SF1-1100 TRANSPORTE DE ELÉTRONS Opuntia Ficus Indica Semiarid soils water stress Human fertilization Planta Forrageira Feed crops Electron transport rate effective quantum efficiency of PSII PEAR Effective quantum efficiency of PSII Forage crops Palma Forrageira Chemistry Phosphorus electron transport rate Nitrogen Animal culture fertilization Fertilization Cactus Animal Science and Zoology Brazil |
| Zdroj: | Repositório Institucional da EMBRAPA (Repository Open Access to Scientific Information from EMBRAPA-Alice) Empresa Brasileira de Pesquisa Agropecuária (Embrapa) instacron:EMBRAPA Revista Brasileira de Zootecnia, Vol 50 (2021) Revista Brasileira de Zootecnia, Volume: 50, Article number: e20210012, Published: 06 AUG 2021 Revista Brasileira de Zootecnia v.50 2021 Revista Brasileira de Zootecnia Sociedade Brasileira de Zootecnia (SBZ) instacron:SBZ Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
| Popis: | This study aimed to evaluate the effects of nitrogen (N) and phosphorus (P) associated with dry and rainy seasons on the photochemical activity of Opuntia ficus-indica (L.) Mill. cv. Gigante. Combinations of N (10.0, 70.0, 100.0, 130.0, and 190.0 kg ha-1 yr-1) and P2O5 (10.0, 70.0, 100.0, 130.0, and 190.0 kg ha -1 yr -1) were evaluated in the dry and rainy seasons in semi-arid regions. A completely randomized block design with split-plot arrangement was adopted with four replications. In Quixadá, the maximum potential quantum efficiency of photosystem II (Fv/Fm) was 0.82, observed in third-order cladodes (rainy season and N/P 75.6/10.0 kg ha -1 yr -1), while in Tejuçuoca, the maximum Fv/Fm was 0.81, found in 2nd/3rd order cladodes (rainy season and N/P 10.0/190.0 kg ha -1 yr -1). In Quixadá, the maximum electron transport rate (ETR) was 31.6 -mol m -2 s -1 in 2nd/3rd order cladodes (rainy season and N/P 10.0/190.0 kg ha -1 yr -1), and in Tejuçuoca, the maximum ETR was 24.1 -mol m -2 s -1, in second-order cladodes (rainy season and N/P 110.1/10.0 kg ha -1 yr -1). In Quixadá and Tejuçuoca, higher values of Fv/Fm and ETR were observed in the rainy season. In Quixadá, the maximum fluorescence decrease ratio (FDR) was 4.04 in third-order cladodes (rainy season and N/P 10.0/114.8 kg ha -1 yr -1), while in Tejuçuoca, the maximum FDR was 6.93, found in 2nd/3rd order cladodes (rainy season and N/P 190.0/10.0 kg ha -1 yr -1). In Quixadá and Tejuçuoca, there was predominance of higher FDR values in the rainy season. Nitrogen, phosphorus, and water status modulate the photochemical efficiency of cladodes of cactus pear cv. Gigante in semi-arid regions. Made available in DSpace on 2021-08-04T14:02:56Z (GMT). No. of bitstreams: 1 CNPC-2021-Art-15.pdf: 443969 bytes, checksum: af5ab6272d11be0b46c12241af6cf504 (MD5) Previous issue date: 2021 |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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