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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
10/05/2022 |
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Data da última atualização: |
02/06/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
CUNHA, R. P. da; BONOW, J. F. L.; MITTELMANN, A.; MAIA, M. de S.; BOHN, A.; OLIVEIRA, R. C. de; SILVA, J. D. G. da; PEDREOSO, C. E. da S. |
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Afiliação: |
RICARDO PEREIRA DA CUNHA, Universidade Federal de Pelotas; JOICE FERNANDA LÜBKE BONOW, Universidade Federal de Pelotas; ANDREA MITTELMANN, CNPGL; MANOEL DE SOUZA MAIA, Universidade Federal de Pelotas; ALBERTO BOHN, Universidade Federal de Pelotas; ROBERTO CAETANO DE OLIVEIRA, Universidade Federal de Pelotas; JÉSSICA DIAS GOMES DA SILVA, Universidade Federal de Pelotas; CARLOS EDUARDO DA SILVA PEDROSO, Universidade Federal de Pelotas. |
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Título: |
Physiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies. |
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Ano de publicação: |
2022 |
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Fonte/Imprenta: |
Ciência Rural, v. 52, n. 6, e20200719, 2022. |
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DOI: |
http://doi.org/10.1590/0103-8478cr20200719 |
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Idioma: |
Inglês |
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Conteúdo: |
ABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds? high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations. RESUMOI: O presente estudo teve como objetivo determinar o efeito de diferentes frequências de desfolha em uma cultivar de azevém de ciclo longo, sobre os componentes de rendimento e a qualidade fisiológica e sanitária das sementes.Foram aplicadas quatro frequências de desfolhas (sem, uma, duas e três). O tempo entre desfolhas foi de 350 graus-dia. No momento da primeira, segunda e terceira desfolha as plantas estavam com 15 cm, 20 cm e 35 cm, respectivamente e foram rebaixadas para metade de suas alturas. Avaliaram-se os componentes de rendimento e a estrutura das plantas por meio dos perfilhos, juntamente com a qualidade fisiológica das sementes, a qual foi verificada por testes de germinação, primeira contagem de germinação, envelhecimento acelerado, teste de tetrazólio, emergência a campo e peso de mil sementes. Para a análise da qualidade sanitária verificou-se a porcentagem (%) de incidência de fungos nas sementes. A segunda desfolha determinou alta qualidade fisiológica e sanitária das sementes devido a maior quantidade de perfilhos primários e secundários produzidos em relação aos demais tratamentos. No entanto não houve diferença significativa para a terceira desfolha, visto que nos perfilhos aéreos emitidos observou-se a mesma qualidade das sementes originadas de perfilhos primários e secundários. A incidência média de fungos como Colletotrichum sp., Fusarium sp., Phoma sp. e Dreshsleras pp. foi menor em plantas de azevém submetidas a três desfolhas. MenosABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds? high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations. RESUMOI: O presente estudo teve como objetivo determinar o efeito de diferentes frequências de desfolha em uma cultivar de ... Mostrar Tudo |
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Palavras-Chave: |
Aerial tillers; Perfilho aéreo. |
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Thesagro: |
Azevém; Desfolha; Fungo; Germinação; Lolium Multiflorum. |
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Thesaurus Nal: |
Defoliation; Fungi; Germination; Tillers. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/1142844/1/Physiological-sanitary-quality.pdf
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Marc: |
LEADER 03876naa a2200349 a 4500
001 2142844
005 2022-06-02
008 2022 bl uuuu u00u1 u #d
024 7 $ahttp://doi.org/10.1590/0103-8478cr20200719$2DOI
100 1 $aCUNHA, R. P. da
245 $aPhysiological and sanitary quality of ryegrass seeds submitted to different defoliation frequencies.$h[electronic resource]
260 $c2022
520 $aABSTRACT: This study determined the effect of different defoliation frequencies in a long-cycle ryegrass cultivar on yield components and the physiological and sanitary quality of seeds. Four defoliation frequencies were applied (without, one, two, and three defoliations). The time between defoliations was 350 degree-days. At the first, second, and third defoliation time, the plants were 15 cm, 20 cm, and 35 cm, respectively, and were lowered to half their height. The yield components and plant structure were evaluated through the tillers, along with the physiological quality of the seeds, which was verified by germination tests, first germination count, accelerated aging, tetrazolium test, field emergence, and weight of a thousand seeds. For the sanitary quality analysis, the percentage (%) of fungi incidence in the seeds was verified. The second defoliation determined the seeds? high physiological and sanitary quality due to the higher amount of primary and secondary tillers produced concerning the other treatments. However, there was no significant difference for the third defoliation since the aerial tillers issued the same quality of seeds originated from primary and secondary tillers. The average incidence of fungi such as Colletotrichum sp., Fusarium sp., Phoma sp., and Dreshslera spp. was lower in ryegrass plants subjected to three defoliations. RESUMOI: O presente estudo teve como objetivo determinar o efeito de diferentes frequências de desfolha em uma cultivar de azevém de ciclo longo, sobre os componentes de rendimento e a qualidade fisiológica e sanitária das sementes.Foram aplicadas quatro frequências de desfolhas (sem, uma, duas e três). O tempo entre desfolhas foi de 350 graus-dia. No momento da primeira, segunda e terceira desfolha as plantas estavam com 15 cm, 20 cm e 35 cm, respectivamente e foram rebaixadas para metade de suas alturas. Avaliaram-se os componentes de rendimento e a estrutura das plantas por meio dos perfilhos, juntamente com a qualidade fisiológica das sementes, a qual foi verificada por testes de germinação, primeira contagem de germinação, envelhecimento acelerado, teste de tetrazólio, emergência a campo e peso de mil sementes. Para a análise da qualidade sanitária verificou-se a porcentagem (%) de incidência de fungos nas sementes. A segunda desfolha determinou alta qualidade fisiológica e sanitária das sementes devido a maior quantidade de perfilhos primários e secundários produzidos em relação aos demais tratamentos. No entanto não houve diferença significativa para a terceira desfolha, visto que nos perfilhos aéreos emitidos observou-se a mesma qualidade das sementes originadas de perfilhos primários e secundários. A incidência média de fungos como Colletotrichum sp., Fusarium sp., Phoma sp. e Dreshsleras pp. foi menor em plantas de azevém submetidas a três desfolhas.
650 $aDefoliation
650 $aFungi
650 $aGermination
650 $aTillers
650 $aAzevém
650 $aDesfolha
650 $aFungo
650 $aGerminação
650 $aLolium Multiflorum
653 $aAerial tillers
653 $aPerfilho aéreo
700 1 $aBONOW, J. F. L.
700 1 $aMITTELMANN, A.
700 1 $aMAIA, M. de S.
700 1 $aBOHN, A.
700 1 $aOLIVEIRA, R. C. de
700 1 $aSILVA, J. D. G. da
700 1 $aPEDREOSO, C. E. da S.
773 $tCiência Rural$gv. 52, n. 6, e20200719, 2022.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Biblioteca |
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Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
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Registro Completo
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Biblioteca(s): |
Embrapa Clima Temperado; Embrapa Unidades Centrais. |
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Data corrente: |
05/10/2016 |
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Data da última atualização: |
10/10/2016 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
NAVA, G.; SANTOS, K. L. dos; COSTA, M. D.; CIOTTA, M. N. |
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Afiliação: |
GILBERTO NAVA, CPACT; Karine Louise dos Santos; Murilo Dalla Costa; Marlise Nara Ciotta. |
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Título: |
Growth, mineral composition, fruit yield, and mycorrhizal colonization of feijoa in response to lime and phosphorus application. |
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Ano de publicação: |
2016 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, v. 51, n. 8, p. 942-949, ago. 2016. |
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Idioma: |
Inglês |
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Conteúdo: |
The objective of this work was to investigate the effect of liming and phosphorus fertilization on the growth, mineral composition of the leaves, fruit yield, and mycorrhizal colonization of young feijoa (Acca sellowiana) plants. Treatments consisted of four liming levels ? 0, 25, 50, and 100% of the dose required to raise the soil pH to 6.5 ? and of five levels of P ? 0, 60, 120, 180, and 240 kg ha?1 P2O5 ?, placed in a randomized complete block design, in a split?plot arrangement, with three replicates. The orchard was established in 2010 with the Helena cultivar. In 2012, 2013, and 2014, plant growth was evaluated by measuring trunk perimeter, plant height, and tree canopy width. Mineral composition of the leaves, regarding P, N, K, Ca, and Mg contents, was assessed annually. Mycorrhizal colonization was evaluated in 2012, and fruit yield was determined in 2014. No interaction was observed between the studied factors. P contents had no effect on the evaluated variables. Liming, however, increases plant growth, mycorrhizal colonization, fruit yield, and Ca and Mg leaf contents, besides reducing K leaf contents. |
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Palavras-Chave: |
Acca sellowina; Adubação fosfatada; Colonização micorrízica; Mineral nutrition; Mycorrhizal colonization; Nutrição mineral; Phosphorus fertilization; Soil acidity. |
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Thesagro: |
Acidez do solo; Estado nutricional. |
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Thesaurus NAL: |
Acca sellowiana; Nutritional status; Plant nutrition; Soil pH. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148554/1/Gilberto-Nava-Artigo-PAB-Goiaba-serrana-02.13.05.002.00.04.pdf
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/148405/1/Growth-mineral-composition.pdf
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Marc: |
LEADER 02131naa a2200325 a 4500
001 2054329
005 2016-10-10
008 2016 bl uuuu u00u1 u #d
100 1 $aNAVA, G.
245 $aGrowth, mineral composition, fruit yield, and mycorrhizal colonization of feijoa in response to lime and phosphorus application.
260 $c2016
520 $aThe objective of this work was to investigate the effect of liming and phosphorus fertilization on the growth, mineral composition of the leaves, fruit yield, and mycorrhizal colonization of young feijoa (Acca sellowiana) plants. Treatments consisted of four liming levels ? 0, 25, 50, and 100% of the dose required to raise the soil pH to 6.5 ? and of five levels of P ? 0, 60, 120, 180, and 240 kg ha?1 P2O5 ?, placed in a randomized complete block design, in a split?plot arrangement, with three replicates. The orchard was established in 2010 with the Helena cultivar. In 2012, 2013, and 2014, plant growth was evaluated by measuring trunk perimeter, plant height, and tree canopy width. Mineral composition of the leaves, regarding P, N, K, Ca, and Mg contents, was assessed annually. Mycorrhizal colonization was evaluated in 2012, and fruit yield was determined in 2014. No interaction was observed between the studied factors. P contents had no effect on the evaluated variables. Liming, however, increases plant growth, mycorrhizal colonization, fruit yield, and Ca and Mg leaf contents, besides reducing K leaf contents.
650 $aAcca sellowiana
650 $aNutritional status
650 $aPlant nutrition
650 $aSoil pH
650 $aAcidez do solo
650 $aEstado nutricional
653 $aAcca sellowina
653 $aAdubação fosfatada
653 $aColonização micorrízica
653 $aMineral nutrition
653 $aMycorrhizal colonization
653 $aNutrição mineral
653 $aPhosphorus fertilization
653 $aSoil acidity
700 1 $aSANTOS, K. L. dos
700 1 $aCOSTA, M. D.
700 1 $aCIOTTA, M. N.
773 $tPesquisa Agropecuária Brasileira, Brasília$gv. 51, n. 8, p. 942-949, ago. 2016.
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Embrapa Clima Temperado (CPACT) |
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Registro |
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