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Registro Completo |
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Biblioteca(s): |
Embrapa Agroindústria Tropical. |
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Data corrente: |
22/09/1993 |
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Data da última atualização: |
22/09/1993 |
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Autoria: |
ZEKRI, M.; KOO, R. C. J. |
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Título: |
Comparative effects of controlled-release and soluble fertilizers on young `valencia' oranges trees. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Proc. Fla. State Hort. Soc., 104, 199-202, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
The effects of 3 controlled-release fertilizers (sulfur-coated urea, methylene urea, and sulfur-coated potassium) were compared to 2 soluble sources (ammonium nitrate and potassium shloride) on young `Valencia' orange trees grown in central Florida. Compared to the controlled-release fertilizers, the soluble fertilizers were more readily available but had shorter residual effects on leaf and soil nitrogen (N) and potassium (K) concentrations. In the top 12 inches of soil, the controlled-release N plots contained 23% more total N than the soluble N plots, while the controlled-release K plots contained 56% more extractable K than the soluble K plots. Differences in soil N concentrations were also found between the 2 controlled-release N sources (sulfur-coated urea and methylene urea) which could be related to the release characteristics of these 2 N sources. Compared to soluble fertilizers, application frequency of controlled-release compounds was reduced from 15 to 6 applications with no adverse effects on tree growth, leaf mineral concentration, or soil fertility durig the first 3 yr. Combining soluble and controlled-release fertilizers in young tree fertilization can offer an economical and an effective program for citrus growers. |
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Thesagro: |
Adubação; Análise; Folha; Fruta; Laranja; Nutrição; Solo. |
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Categoria do assunto: |
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Marc: |
LEADER 01817naa a2200217 a 4500
001 1417830
005 1993-09-22
008 1991 bl --- 0-- u #d
100 1 $aZEKRI, M.
245 $aComparative effects of controlled-release and soluble fertilizers on young `valencia' oranges trees.
260 $c1991
520 $aThe effects of 3 controlled-release fertilizers (sulfur-coated urea, methylene urea, and sulfur-coated potassium) were compared to 2 soluble sources (ammonium nitrate and potassium shloride) on young `Valencia' orange trees grown in central Florida. Compared to the controlled-release fertilizers, the soluble fertilizers were more readily available but had shorter residual effects on leaf and soil nitrogen (N) and potassium (K) concentrations. In the top 12 inches of soil, the controlled-release N plots contained 23% more total N than the soluble N plots, while the controlled-release K plots contained 56% more extractable K than the soluble K plots. Differences in soil N concentrations were also found between the 2 controlled-release N sources (sulfur-coated urea and methylene urea) which could be related to the release characteristics of these 2 N sources. Compared to soluble fertilizers, application frequency of controlled-release compounds was reduced from 15 to 6 applications with no adverse effects on tree growth, leaf mineral concentration, or soil fertility durig the first 3 yr. Combining soluble and controlled-release fertilizers in young tree fertilization can offer an economical and an effective program for citrus growers.
650 $aAdubação
650 $aAnálise
650 $aFolha
650 $aFruta
650 $aLaranja
650 $aNutrição
650 $aSolo
700 1 $aKOO, R. C. J.
773 $tProc. Fla. State Hort. Soc., 104, 199-202, 1991.
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Registro original: |
Embrapa Agroindústria Tropical (CNPAT) |
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