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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
05/09/1996 |
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Data da última atualização: |
18/12/2008 |
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Autoria: |
MITSUI, S.; ASO, S.; KUMAZAWA, K. |
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Afiliação: |
Faculty of Agriculture, Tokyo University. |
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Título: |
Dynamic studies on the nutrient uptake by crop plants. Part I. The nutrients uptake of rice root as influenced by hydrogen sulfide. |
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Ano de publicação: |
1951 |
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Fonte/Imprenta: |
Journal Science Soil Manure Japan, v.22, p.22-46, 1951. |
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Idioma: |
Inglês |
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Conteúdo: |
In the cource of some dynamic studies of the nutrients uptake by crop plants the results of the nutrient uptake of rice crop as influenced by hy drogen sulfide may be summarised as follows: (1) Hydrogen sulfide was bubbled through the water culture solution for about ten minutes in which the root of rice plant was immerced. In one case, the initial pH of the culture solution was controlled to 7.0 and 4.5 respectively. In every case the uptake of NH4-N and water was depressed seriously, through the effect was always more pronounced for NH4-N than H2O (Table 1 (a) (b) and Table 2).
(2) The effect of concentration and the period of contact of H2O-H2S was studied by rice seedlingls. The seedlings were grown in an artificially controlled room (light and temperature) and the effect was conveniently observed through the percent increase of the wilted leaves, which was the definite sign of the reduction in absorption. The injury was enhanced on the prolonged contact or the increased concentration; the wilting at last appeared in 288 hours even by the extremely dilute concentration of 0.07 ppm as S (Table 3 (a) (b).
(3) Hydrogen sulfide was bubbled through the water culture solution as in (1) and the results of the uptake of NH4-N, CaO, SiO2, MnO, MgO, P2O5 and H2O were tested statistically (Table 4 and Fig. 1). In general, they were higly significant enough to permit definite conclusion.
The treatment reduced the uptake in the order P2O5> K2O>Si02>NH4-N>MnO>H2O> MgO>CaO.The order of P2O5 should be questioned, as it was evident that some P2O5 temporarily adhering to the surface of the root as basic phosphated iron could have entered into the solution on H2S treatment. The result was discussed in two ways. Practically, it seems to permit more logical interpretation of the mechanism, why the severe attack of Helminthosporium leaf spot predominantes in the poor productive paddy rice field in Japan, where the evolution of hydrogen sulfide is believed to injure the rice root on account of the lack of active iron in the soil (a kind of podsolisation). The relatively strong reduction in absorption in such elements as K2O, SiO2, NH4-N, MnO as compared to H2O, MgO, CaO concurrs with the several investigations which poit to the high correlation between the deficiency of these elements and the occurrence of the named desease. Theoretically, however, the result must be nothing but the reduction of the "metabolic absorption" as proposed by Hoagland and his associates, on the more or less interruption of which the pure physicochemical characteristic properties of ions, in this case "hydration", might have substantially affected the ion absorption in the order of the well-known lyotropic series. In fact, as for those elements to which the lyotropic series are generally unquestionable the order of the reduction of ion absorption was K2O>NH4-N> MgO>CaO. MenosIn the cource of some dynamic studies of the nutrients uptake by crop plants the results of the nutrient uptake of rice crop as influenced by hy drogen sulfide may be summarised as follows: (1) Hydrogen sulfide was bubbled through the water culture solution for about ten minutes in which the root of rice plant was immerced. In one case, the initial pH of the culture solution was controlled to 7.0 and 4.5 respectively. In every case the uptake of NH4-N and water was depressed seriously, through the effect was always more pronounced for NH4-N than H2O (Table 1 (a) (b) and Table 2).
(2) The effect of concentration and the period of contact of H2O-H2S was studied by rice seedlingls. The seedlings were grown in an artificially controlled room (light and temperature) and the effect was conveniently observed through the percent increase of the wilted leaves, which was the definite sign of the reduction in absorption. The injury was enhanced on the prolonged contact or the increased concentration; the wilting at last appeared in 288 hours even by the extremely dilute concentration of 0.07 ppm as S (Table 3 (a) (b).
(3) Hydrogen sulfide was bubbled through the water culture solution as in (1) and the results of the uptake of NH4-N, CaO, SiO2, MnO, MgO, P2O5 and H2O were tested statistically (Table 4 and Fig. 1). In general, they were higly significant enough to permit definite conclusion.
The treatment reduced the uptake in the order P2O5> K2O>Si02>NH4-N>MnO>H2O> MgO>CaO.The order ... Mostrar Tudo |
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Palavras-Chave: |
Crop; Dynamic studies; Estudo dinamico; Nutrient; Plant; Rice root. |
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Thesagro: |
Arroz; Colheita; Nutriente; Planta; Raiz. |
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Thesaurus Nal: |
hydrogen sulfide. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03669naa a2200289 a 4500
001 1789624
005 2008-12-18
008 1951 bl --- 0-- u #d
100 1 $aMITSUI, S.
245 $aDynamic studies on the nutrient uptake by crop plants. Part I. The nutrients uptake of rice root as influenced by hydrogen sulfide.
260 $c1951
520 $aIn the cource of some dynamic studies of the nutrients uptake by crop plants the results of the nutrient uptake of rice crop as influenced by hy drogen sulfide may be summarised as follows: (1) Hydrogen sulfide was bubbled through the water culture solution for about ten minutes in which the root of rice plant was immerced. In one case, the initial pH of the culture solution was controlled to 7.0 and 4.5 respectively. In every case the uptake of NH4-N and water was depressed seriously, through the effect was always more pronounced for NH4-N than H2O (Table 1 (a) (b) and Table 2). (2) The effect of concentration and the period of contact of H2O-H2S was studied by rice seedlingls. The seedlings were grown in an artificially controlled room (light and temperature) and the effect was conveniently observed through the percent increase of the wilted leaves, which was the definite sign of the reduction in absorption. The injury was enhanced on the prolonged contact or the increased concentration; the wilting at last appeared in 288 hours even by the extremely dilute concentration of 0.07 ppm as S (Table 3 (a) (b). (3) Hydrogen sulfide was bubbled through the water culture solution as in (1) and the results of the uptake of NH4-N, CaO, SiO2, MnO, MgO, P2O5 and H2O were tested statistically (Table 4 and Fig. 1). In general, they were higly significant enough to permit definite conclusion. The treatment reduced the uptake in the order P2O5> K2O>Si02>NH4-N>MnO>H2O> MgO>CaO.The order of P2O5 should be questioned, as it was evident that some P2O5 temporarily adhering to the surface of the root as basic phosphated iron could have entered into the solution on H2S treatment. The result was discussed in two ways. Practically, it seems to permit more logical interpretation of the mechanism, why the severe attack of Helminthosporium leaf spot predominantes in the poor productive paddy rice field in Japan, where the evolution of hydrogen sulfide is believed to injure the rice root on account of the lack of active iron in the soil (a kind of podsolisation). The relatively strong reduction in absorption in such elements as K2O, SiO2, NH4-N, MnO as compared to H2O, MgO, CaO concurrs with the several investigations which poit to the high correlation between the deficiency of these elements and the occurrence of the named desease. Theoretically, however, the result must be nothing but the reduction of the "metabolic absorption" as proposed by Hoagland and his associates, on the more or less interruption of which the pure physicochemical characteristic properties of ions, in this case "hydration", might have substantially affected the ion absorption in the order of the well-known lyotropic series. In fact, as for those elements to which the lyotropic series are generally unquestionable the order of the reduction of ion absorption was K2O>NH4-N> MgO>CaO.
650 $ahydrogen sulfide
650 $aArroz
650 $aColheita
650 $aNutriente
650 $aPlanta
650 $aRaiz
653 $aCrop
653 $aDynamic studies
653 $aEstudo dinamico
653 $aNutrient
653 $aPlant
653 $aRice root
700 1 $aASO, S.
700 1 $aKUMAZAWA, K.
773 $tJournal Science Soil Manure Japan$gv.22, p.22-46, 1951.
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Registro original: |
Embrapa Pantanal (CPAP) |
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