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Registro Completo |
Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
03/07/2017 |
Data da última atualização: |
03/07/2017 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Autoria: |
OLIVEIRA, R. A.; COMIN, J. J.; TIECHER, R.; PICCIN, R.; SOMAVILLA, L. M.; LOSS, A.; LOURENZI, C. R.; KURTZ, C.; BRUNETTO, G. |
Título: |
Release of Phosphorus Forms from Cover Crop Residues in Agroecological No-Till Onion Production. |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Revista Brasileira de Ciência do Solo, VIÇOSA, MG, v.41 , p. 1-16, 2017. |
Idioma: |
Inglês |
Conteúdo: |
Cover crops grown alone or in association can take up different amounts of phosphorus (P) from the soil and accumulate it in different P-forms in plant tissue. Cover crop residues with a higher content of readily decomposed forms may release P more quickly for the next onion crop. The aim of this study was to evaluate the release of P forms from residues of single and mixed cover crops in agroecological no-till onion (Allium cepa L.) production. The experiment was conducted in Ituporanga, Santa Catarina (SC), Brazil, in an Inceptisol, with the following treatments: weeds, black oat (Avena sativa L.), rye (Secale cereale L.), oilseed radish (Raphanus sativus L.), oilseed radish + black oat, and oilseed radish + rye. Cover crops were sown in April 2013. In July 2013, plant shoots were cut close to the soil surface and part of the material was placed in litterbags. The bags were placed on the soil surface and residues were collected at 0, 15, and 45 days after deposition (DAD). Residues were dried and ground and P in the plant tissue was determined through chemical fractionation. The release of P contained in the tissue of cover crops depends not only on total P content in the tissue, but also on the accumulation of P forms and the quality of the residue in decomposition. The highest accumulation of P in cover crops occurred in the soluble inorganic P fraction, which is the fraction of fastest release in plants. Black oat had the highest initial release rate of soluble inorganic P, which became equal to the release rate of other cover crop residues at 45 DAD. Weeds released only half the amount of soluble inorganic P in the same period, despite accumulating a considerable amount of P in their biomass. The mixtures of oilseed radish + rye and oilseed radish + black oat showed higher release of P associated with RNA at 45 DAD in comparison to the single treatments. MenosCover crops grown alone or in association can take up different amounts of phosphorus (P) from the soil and accumulate it in different P-forms in plant tissue. Cover crop residues with a higher content of readily decomposed forms may release P more quickly for the next onion crop. The aim of this study was to evaluate the release of P forms from residues of single and mixed cover crops in agroecological no-till onion (Allium cepa L.) production. The experiment was conducted in Ituporanga, Santa Catarina (SC), Brazil, in an Inceptisol, with the following treatments: weeds, black oat (Avena sativa L.), rye (Secale cereale L.), oilseed radish (Raphanus sativus L.), oilseed radish + black oat, and oilseed radish + rye. Cover crops were sown in April 2013. In July 2013, plant shoots were cut close to the soil surface and part of the material was placed in litterbags. The bags were placed on the soil surface and residues were collected at 0, 15, and 45 days after deposition (DAD). Residues were dried and ground and P in the plant tissue was determined through chemical fractionation. The release of P contained in the tissue of cover crops depends not only on total P content in the tissue, but also on the accumulation of P forms and the quality of the residue in decomposition. The highest accumulation of P in cover crops occurred in the soluble inorganic P fraction, which is the fraction of fastest release in plants. Black oat had the highest initial release rate of soluble inorgani... Mostrar Tudo |
Palavras-Chave: |
Allium cepa L; Green manure crops; P cycling. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02631naa a2200253 a 4500 001 1126309 005 2017-07-03 008 2017 bl uuuu u00u1 u #d 100 1 $aOLIVEIRA, R. A. 245 $aRelease of Phosphorus Forms from Cover Crop Residues in Agroecological No-Till Onion Production.$h[electronic resource] 260 $c2017 520 $aCover crops grown alone or in association can take up different amounts of phosphorus (P) from the soil and accumulate it in different P-forms in plant tissue. Cover crop residues with a higher content of readily decomposed forms may release P more quickly for the next onion crop. The aim of this study was to evaluate the release of P forms from residues of single and mixed cover crops in agroecological no-till onion (Allium cepa L.) production. The experiment was conducted in Ituporanga, Santa Catarina (SC), Brazil, in an Inceptisol, with the following treatments: weeds, black oat (Avena sativa L.), rye (Secale cereale L.), oilseed radish (Raphanus sativus L.), oilseed radish + black oat, and oilseed radish + rye. Cover crops were sown in April 2013. In July 2013, plant shoots were cut close to the soil surface and part of the material was placed in litterbags. The bags were placed on the soil surface and residues were collected at 0, 15, and 45 days after deposition (DAD). Residues were dried and ground and P in the plant tissue was determined through chemical fractionation. The release of P contained in the tissue of cover crops depends not only on total P content in the tissue, but also on the accumulation of P forms and the quality of the residue in decomposition. The highest accumulation of P in cover crops occurred in the soluble inorganic P fraction, which is the fraction of fastest release in plants. Black oat had the highest initial release rate of soluble inorganic P, which became equal to the release rate of other cover crop residues at 45 DAD. Weeds released only half the amount of soluble inorganic P in the same period, despite accumulating a considerable amount of P in their biomass. The mixtures of oilseed radish + rye and oilseed radish + black oat showed higher release of P associated with RNA at 45 DAD in comparison to the single treatments. 653 $aAllium cepa L 653 $aGreen manure crops 653 $aP cycling 700 1 $aCOMIN, J. J. 700 1 $aTIECHER, R. 700 1 $aPICCIN, R. 700 1 $aSOMAVILLA, L. M. 700 1 $aLOSS, A. 700 1 $aLOURENZI, C. R. 700 1 $aKURTZ, C. 700 1 $aBRUNETTO, G. 773 $tRevista Brasileira de Ciência do Solo, VIÇOSA, MG$gv.41 , p. 1-16, 2017.
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Biblioteca(s): |
Epagri-Sede. |
Data corrente: |
02/02/2018 |
Data da última atualização: |
02/02/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
Nacional - B |
Autoria: |
PASA, M. S.; SILVA, C. P.; CARRA, B.; BRIGHENTI, A. F.; SOUZA, A. L. K.; SCHMITZ, J. D.; KATSURAYAMA, J. M.; CIOTTA, M. N. |
Título: |
Fruit set and yield of 'Santa Maria' and 'Abate Fetel' pears are increased by early spring application of aminoethoxyvinilglycine (AVG). |
Ano de publicação: |
2017 |
Fonte/Imprenta: |
Revista de Ciências Agroveterinárias, Lages, v. 16, n. 4, p. 487-491, 2017. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to evaluate the effect of aminoethoxyvinilglycine (AVG), sprayed at different doses, on yield components and fruit quality of pear trees, during the growing seasons of 2015/2016 and 2016/2017, in São Joaquim, Santa Catarina state, Brazil. Treatments consisted of AVG sprayed one week after full bloom (WAFB) ) at different doses on ?Santa Maria? (0 mg L-1, 40 mg L-1, 80 mg L-1, and 120 mg L-1) and ?Abate Fetel? (0 mg L-1, 80 mg L-1, and 100 mg L-1) pear trees, arranged in a randomized block design. Yield components and fruit quality attributes were assessed. Fruit set, number of fruit per tree and yield are signifcantly improved and positively related to AVG dose for both cultivars, while fruit quality attributes and fruit size are not affected by treatments. |
Palavras-Chave: |
ethylene; fruit drop; fruit quality; plant growth regulators; Pyrus communis. |
Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 01627naa a2200265 a 4500 001 1127029 005 2018-02-02 008 2017 bl uuuu u00u1 u #d 100 1 $aPASA, M. S. 245 $aFruit set and yield of 'Santa Maria' and 'Abate Fetel' pears are increased by early spring application of aminoethoxyvinilglycine (AVG).$h[electronic resource] 260 $c2017 520 $aThe objective of this study was to evaluate the effect of aminoethoxyvinilglycine (AVG), sprayed at different doses, on yield components and fruit quality of pear trees, during the growing seasons of 2015/2016 and 2016/2017, in São Joaquim, Santa Catarina state, Brazil. Treatments consisted of AVG sprayed one week after full bloom (WAFB) ) at different doses on ?Santa Maria? (0 mg L-1, 40 mg L-1, 80 mg L-1, and 120 mg L-1) and ?Abate Fetel? (0 mg L-1, 80 mg L-1, and 100 mg L-1) pear trees, arranged in a randomized block design. Yield components and fruit quality attributes were assessed. Fruit set, number of fruit per tree and yield are signifcantly improved and positively related to AVG dose for both cultivars, while fruit quality attributes and fruit size are not affected by treatments. 653 $aethylene 653 $afruit drop 653 $afruit quality 653 $aplant growth regulators 653 $aPyrus communis 700 1 $aSILVA, C. P. 700 1 $aCARRA, B. 700 1 $aBRIGHENTI, A. F. 700 1 $aSOUZA, A. L. K. 700 1 $aSCHMITZ, J. D. 700 1 $aKATSURAYAMA, J. M. 700 1 $aCIOTTA, M. N. 773 $tRevista de Ciências Agroveterinárias, Lages$gv. 16, n. 4, p. 487-491, 2017.
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