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Registro Completo |
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
25/06/2003 |
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Data da última atualização: |
25/10/2018 |
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Autoria: |
ROSOLEM, C. A.; SILVA, R. H. da; ESTEVES, J. A. de F. |
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Afiliação: |
Ciro Antonio Rosolem, Universidade Estadual Paulista - Unesp/Faculdade de Ciências Agronômicas/Departamento de Produção Vegetal; Rosemeire Helena da Silva, Universidade Estadual Paulista - Unesp/Faculdade de Ciências Agronômicas/Departamento de Produção Vegetal; José Antonio de Fátima Esteves, Universidade Estadual Paulista - Unesp/Faculdade de Ciências Agronômicas/Departamento de Produção Vegetal. |
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Título: |
Potassium supply to cotton roots as affected by potassium fertilization and liming. |
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Ano de publicação: |
2003 |
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Fonte/Imprenta: |
Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 5, p. 635-641, maio 2003 |
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Idioma: |
Inglês |
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Notas: |
Título em português: Suprimento de potássio a raízes de algodoeiro em razão da adubação potássica e calagem. |
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Conteúdo: |
Cotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime. Mass flow and diffusion increased linearly with K levels up to 60 mg kg-1, in pots with lime. In pots without lime the amount of K reaching the roots by diffusion increased up to 45 mg kg-1, but decreased at the highest K level. Accordingly, there was more K reaching the roots through mass flow at the highest K level. This happened because there were more fine roots in pots without lime, at the highest K level. As the roots grew closer, there was a stronger root competition leading to a decrease in the amount of K diffused to cotton roots. |
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Palavras-Chave: |
correção calcária; difusão; growth. |
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Thesagro: |
Crescimento; Gossypium Hirsutum; Massa; Nutrição Vegetal; Raiz. |
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Thesaurus Nal: |
diffusion; liming materials; mass; plant nutrition; roots. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/24590/1/v38n5_635.pdf
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Marc: |
LEADER 02262naa a2200313 a 4500
001 1109004
005 2018-10-25
008 2003 bl uuuu u00u1 u #d
100 1 $aROSOLEM, C. A.
245 $aPotassium supply to cotton roots as affected by potassium fertilization and liming.
260 $c2003
500 $aTítulo em português: Suprimento de potássio a raízes de algodoeiro em razão da adubação potássica e calagem.
520 $aCotton (Gossypium hirsutum) is known to have a high requirement for K and to be very sensitive to low soil pH. Most of K reaches plant roots by diffusion in the soil. As K interacts with Ca and Mg, liming can interfere in K movement in the soil, affecting eventually the plant nutrition. The objective of this work was to study the effect of dolomitic lime and 0, 15, 30, 45 and 60 g kg-1 of K on the supply of K to cotton roots. Cotton plants were grown up to 40 days in 5 L pots containing a Dark Red Latosol (Typic Haplusthox) with 68% and 16% of sand and clay, respectively. There was an increase in dry matter yields and in K accumulation due to K fertilization. Root interception of soil K was also increased by K application, but was not affected by lime. Mass flow and diffusion increased linearly with K levels up to 60 mg kg-1, in pots with lime. In pots without lime the amount of K reaching the roots by diffusion increased up to 45 mg kg-1, but decreased at the highest K level. Accordingly, there was more K reaching the roots through mass flow at the highest K level. This happened because there were more fine roots in pots without lime, at the highest K level. As the roots grew closer, there was a stronger root competition leading to a decrease in the amount of K diffused to cotton roots.
650 $adiffusion
650 $aliming materials
650 $amass
650 $aplant nutrition
650 $aroots
650 $aCrescimento
650 $aGossypium Hirsutum
650 $aMassa
650 $aNutrição Vegetal
650 $aRaiz
653 $acorreção calcária
653 $adifusão
653 $agrowth
700 1 $aSILVA, R. H. da
700 1 $aESTEVES, J. A. de F.
773 $tPesquisa Agropecuária Brasileira, Brasília, DF$gv. 38, n. 5, p. 635-641, maio 2003
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Embrapa Unidades Centrais (AI-SEDE) |
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| 4. |  | CARVALHO-PUPATTO, J. G.; BÜLL, L. T.; CRUSCIOL, C. A. C.; MAUAD, M.; SILVA, R. H. da. Efeito de escória de alto forno no crescimento radicular e na produtividade de arroz. Pesquisa Agropecuária Brasileira, Brasília, DF, v. 38, n. 11, p. 1323-1328, nov. 2003 Título em inglês: Effect of blast furnace slag on root growth and yield of rice.| Biblioteca(s): Embrapa Unidades Centrais. |
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