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Registro Completo |
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Biblioteca(s): |
Embrapa Tabuleiros Costeiros. |
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Data corrente: |
17/09/1996 |
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Data da última atualização: |
14/09/2016 |
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Autoria: |
LOGANATHAN, P.; DAYARATNE, P. M. N.; SHANMUGANATHAN, R. T. |
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Título: |
Evaluation of the phosphorus status of some coconut growing soils of Sri Lanka. |
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Ano de publicação: |
1984 |
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Fonte/Imprenta: |
Journal of the Coconut Research Institute of Sri Lanka, v. 2, p. 29-43, 1984. |
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Idioma: |
Inglês |
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Conteúdo: |
The phosphorus status of 58 soil samples representing 15 soils series and four soil orders (Ultisol, Entisol, Alfisol and Oxisol) in the major coconut-growing regions of Sri Lanka was evaluated by determining the available P extracted by methods of Olsen, Bray and Kurtz numero 1, Bray & Hurtz numero 2 and NH4 OAc(pH 4.8) and the various P forms. Total P in the soils ranged from 37 to 338 mg/kg with organic P and active P constituing only about 20 and 50% of the total P respectively. In general the sandy soils of the Entisols and Oxisols had lower total and organic P but higher active and available P than the rest. The relative abundance of the various inorganic P forms was generally in the decreasing order of inactive P, Fe-P, Al-P and Ca-P, Al-P and Ca-P were positively correlated with percentage sand and negatively correlated with percentage silt and percentage clay whereas total P and organic P had the opposit trend. Available P extracted by the four methods was very low in almost all soils except some of the sandy soils (Entisols) which had marginal to moderate P concents. They are positively correlated with Al-P, Ca-P percentage sand and negatively correlated with percentages of slit, clay and organic carbon. Phosphorus concentrations (0.074-0.116%) in the 14th leaf of coconut at the soil sites were all lower than the critical leaf-P concentration (0.120%). Leaf-P correlations with Bray & Kurtz numero 2-P and NH4 OAc-P were significant (P<0.05). |
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Palavras-Chave: |
Coconut; Coqueiro; Soils; Solos. |
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Thesagro: |
Cocos Nucifera; Fósforo. |
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Thesaurus Nal: |
phosphorus; Sri Lanka. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02156naa a2200241 a 4500
001 1355266
005 2016-09-14
008 1984 bl uuuu u00u1 u #d
100 1 $aLOGANATHAN, P.
245 $aEvaluation of the phosphorus status of some coconut growing soils of Sri Lanka.$h[electronic resource]
260 $c1984
520 $aThe phosphorus status of 58 soil samples representing 15 soils series and four soil orders (Ultisol, Entisol, Alfisol and Oxisol) in the major coconut-growing regions of Sri Lanka was evaluated by determining the available P extracted by methods of Olsen, Bray and Kurtz numero 1, Bray & Hurtz numero 2 and NH4 OAc(pH 4.8) and the various P forms. Total P in the soils ranged from 37 to 338 mg/kg with organic P and active P constituing only about 20 and 50% of the total P respectively. In general the sandy soils of the Entisols and Oxisols had lower total and organic P but higher active and available P than the rest. The relative abundance of the various inorganic P forms was generally in the decreasing order of inactive P, Fe-P, Al-P and Ca-P, Al-P and Ca-P were positively correlated with percentage sand and negatively correlated with percentage silt and percentage clay whereas total P and organic P had the opposit trend. Available P extracted by the four methods was very low in almost all soils except some of the sandy soils (Entisols) which had marginal to moderate P concents. They are positively correlated with Al-P, Ca-P percentage sand and negatively correlated with percentages of slit, clay and organic carbon. Phosphorus concentrations (0.074-0.116%) in the 14th leaf of coconut at the soil sites were all lower than the critical leaf-P concentration (0.120%). Leaf-P correlations with Bray & Kurtz numero 2-P and NH4 OAc-P were significant (P<0.05).
650 $aphosphorus
650 $aSri Lanka
650 $aCocos Nucifera
650 $aFósforo
653 $aCoconut
653 $aCoqueiro
653 $aSoils
653 $aSolos
700 1 $aDAYARATNE, P. M. N.
700 1 $aSHANMUGANATHAN, R. T.
773 $tJournal of the Coconut Research Institute of Sri Lanka$gv. 2, p. 29-43, 1984.
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