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Registro Completo |
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Biblioteca(s): |
Embrapa Pantanal. |
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Data corrente: |
05/06/1995 |
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Data da última atualização: |
05/04/2017 |
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Autoria: |
ASHRAF, M.; YASMIN, H. |
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Título: |
Differential waterlogging tolerance in three grasses of contrasting habitats: Aeluropus lagopoides (L.) Trin., Cynodon dactylon (L.) Pers. and Leptochloa fusca (L.) Kunth. |
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Ano de publicação: |
1991 |
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Fonte/Imprenta: |
Environmental and Experimental Botany, v.31, n.4, p.437-445, 1991. |
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Idioma: |
Inglês |
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Conteúdo: |
High concentrations of reduced iron and manganese developed as a result of anoxia in waterlogged soils, cause considerable growth inhibition in many plant species. In order to determine the effect of waterlogging on three grass species, Aeluropus lagopoides (L.) Trin., Cynodon dactylon (L.) Pers. and Leptochloa fusca (L.) Kunth., particularly in relation to iron and manganese, they were subjected to three waterlogging treatments: unflooded (control), intermittent and continuous waterlogging for 6 weeks in a greenhouse. Waterlogging had an adverse effect on the growth of A. lagopides and C. dactylon. Leptochloa fusca produced significantly more dry biomass and had a lower water potential than the other two species under, waterlogged conditions. Waterloggins treatments caused a marked but comparable reduction in chlorophyll content in all three species. Shoot iron and manganese contents increased in all three species with increasing waterlogging, but least in L. fusca which had the ability to accumulate relatively more iron and manganese in or on its roots. A. lagopoides and C. dactylon contained more than 2000 ug/g iron in the shoots, a concentration reported as toxic in most plants. Root iron and manganese contents increased more in L. fusca than in the other two species, showing immobilization on or on the roots. Leptochloa fusca was relatively most tolerant, A. lagopoides intermediate and C. dactylon most sensitive to waterlogging. The tolerance of L. fusca to waterlogging was related to its better ability to control the uptake of iron and manganese to the shoots. MenosHigh concentrations of reduced iron and manganese developed as a result of anoxia in waterlogged soils, cause considerable growth inhibition in many plant species. In order to determine the effect of waterlogging on three grass species, Aeluropus lagopoides (L.) Trin., Cynodon dactylon (L.) Pers. and Leptochloa fusca (L.) Kunth., particularly in relation to iron and manganese, they were subjected to three waterlogging treatments: unflooded (control), intermittent and continuous waterlogging for 6 weeks in a greenhouse. Waterlogging had an adverse effect on the growth of A. lagopides and C. dactylon. Leptochloa fusca produced significantly more dry biomass and had a lower water potential than the other two species under, waterlogged conditions. Waterloggins treatments caused a marked but comparable reduction in chlorophyll content in all three species. Shoot iron and manganese contents increased in all three species with increasing waterlogging, but least in L. fusca which had the ability to accumulate relatively more iron and manganese in or on its roots. A. lagopoides and C. dactylon contained more than 2000 ug/g iron in the shoots, a concentration reported as toxic in most plants. Root iron and manganese contents increased more in L. fusca than in the other two species, showing immobilization on or on the roots. Leptochloa fusca was relatively most tolerant, A. lagopoides intermediate and C. dactylon most sensitive to waterlogging. The tolerance of L. fusca to waterlogging... Mostrar Tudo |
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Palavras-Chave: |
Growth; Plant. |
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Thesagro: |
Crescimento; Planta. |
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Categoria do assunto: |
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Marc: |
LEADER 02173naa a2200181 a 4500
001 1784303
005 2017-04-05
008 1991 bl --- 0-- u #d
100 1 $aASHRAF, M.
245 $aDifferential waterlogging tolerance in three grasses of contrasting habitats$bAeluropus lagopoides (L.) Trin., Cynodon dactylon (L.) Pers. and Leptochloa fusca (L.) Kunth.
260 $c1991
520 $aHigh concentrations of reduced iron and manganese developed as a result of anoxia in waterlogged soils, cause considerable growth inhibition in many plant species. In order to determine the effect of waterlogging on three grass species, Aeluropus lagopoides (L.) Trin., Cynodon dactylon (L.) Pers. and Leptochloa fusca (L.) Kunth., particularly in relation to iron and manganese, they were subjected to three waterlogging treatments: unflooded (control), intermittent and continuous waterlogging for 6 weeks in a greenhouse. Waterlogging had an adverse effect on the growth of A. lagopides and C. dactylon. Leptochloa fusca produced significantly more dry biomass and had a lower water potential than the other two species under, waterlogged conditions. Waterloggins treatments caused a marked but comparable reduction in chlorophyll content in all three species. Shoot iron and manganese contents increased in all three species with increasing waterlogging, but least in L. fusca which had the ability to accumulate relatively more iron and manganese in or on its roots. A. lagopoides and C. dactylon contained more than 2000 ug/g iron in the shoots, a concentration reported as toxic in most plants. Root iron and manganese contents increased more in L. fusca than in the other two species, showing immobilization on or on the roots. Leptochloa fusca was relatively most tolerant, A. lagopoides intermediate and C. dactylon most sensitive to waterlogging. The tolerance of L. fusca to waterlogging was related to its better ability to control the uptake of iron and manganese to the shoots.
650 $aCrescimento
650 $aPlanta
653 $aGrowth
653 $aPlant
700 1 $aYASMIN, H.
773 $tEnvironmental and Experimental Botany$gv.31, n.4, p.437-445, 1991.
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Embrapa Pantanal (CPAP) |
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Registro Completo
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
05/09/2008 |
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Data da última atualização: |
05/09/2008 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
NADOLNY, H.; SILVA, V. L. da; NEVES, E. J. M.; CARPANEZZI, A. A.; BROWN, G. G. |
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Afiliação: |
Herlon Nadolny, Estudante Mestrado UFPR; Vagner L. da Silva, Estudante Mestrado UFPR; Edinelson José Maciel Neves, Embrapa Florestas; Antônio Aparecido Carpanezzi, Embrapa Florestas; George Gardner Brown, Embrapa Florestas. |
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Título: |
Soil macrofauna populations in tree plantations used to recover degraded pastures in the Atlantic Rainforest of Antonina, Paraná, Brazil. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Large areas of the Atlantic coastal rainforest have been deforested in the past mainly for
agricultural purposes, especially cattle grazing. However, many of these areas are currently underutilized or degraded by overgrazing or intensive use. In the coastal region of Paraná, smallscale buffalo grazing has led to considerable local soil degradation and, with the abandonment of the pastures, the exotic Brachiaria sp. grass spreads and becomes a problem for the restoration of these pastures and for alternative uses, such as palmito (heart-of-palm), native forest regeneration or forestry activities. Therefore, to evaluate the potential of various native tree species in the restoration of these pastures, a trial was established in 2002 at a private reserve of the Sociedade de Proteção da Vida Silvestre (SPVS), near Antonina. The experiment was set up in 4 blocks with 3 replicates and 5 native species, planted in plots of 10 x 16 m. For the present study, two tree species were chosen, both legumes: ingá (Inga sp.) and capororoca (Myrsine sp.). The effect of these treatments on the soil fauna abundance and diversity was investigated using the standard TSBF method (25 x 25 cm blocks) but only in the top-soil horizon
(0-10 cm), due to a high water-table. Two samples were taken per plot, with a total of 18 samples in the Myrsine sp. and 14 in the Inga sp. Four earthworm species were found, two exotic megascolecids, Pontoscolex corethrurus (Müller, 1857), and another yet unidentified ocnerodrilid. Total macrofauna group diversity was higher in the Myrsine (11) than Inga (7) sp. plots, and total abundance was also slightly higher (644 vs. 483 indiv. m-2, respectively). Earthworms represented >80% of total abundance, and P. corethrurus predominated, representing 85% of all collected earthworms (973 individuals, including 33 cocoons). The other most abundant fauna were snails, beetles and Millipedes, representing each <10% of total abundance. Principle components and redundancy analyses showed a separation of the sample sites based mainly on soil moisture and earthworm (especially P. corethrurus) abundance, both of which tended to be larger in
Myrsine sp. plots. MenosLarge areas of the Atlantic coastal rainforest have been deforested in the past mainly for
agricultural purposes, especially cattle grazing. However, many of these areas are currently underutilized or degraded by overgrazing or intensive use. In the coastal region of Paraná, smallscale buffalo grazing has led to considerable local soil degradation and, with the abandonment of the pastures, the exotic Brachiaria sp. grass spreads and becomes a problem for the restoration of these pastures and for alternative uses, such as palmito (heart-of-palm), native forest regeneration or forestry activities. Therefore, to evaluate the potential of various native tree species in the restoration of these pastures, a trial was established in 2002 at a private reserve of the Sociedade de Proteção da Vida Silvestre (SPVS), near Antonina. The experiment was set up in 4 blocks with 3 replicates and 5 native species, planted in plots of 10 x 16 m. For the present study, two tree species were chosen, both legumes: ingá (Inga sp.) and capororoca (Myrsine sp.). The effect of these treatments on the soil fauna abundance and diversity was investigated using the standard TSBF method (25 x 25 cm blocks) but only in the top-soil horizon
(0-10 cm), due to a high water-table. Two samples were taken per plot, with a total of 18 samples in the Myrsine sp. and 14 in the Inga sp. Four earthworm species were found, two exotic megascolecids, Pontoscolex corethrurus (Müller, 1857), and another yet unidentified o... Mostrar Tudo |
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Palavras-Chave: |
Macrofauna; Pastagem degradada; Plantação florestal; Recuperação. |
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Thesagro: |
Solo. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03149naa a2200229 a 4500
001 1314776
005 2008-09-05
008 2008 bl --- 0-- u #d
100 1 $aNADOLNY, H.
245 $aSoil macrofauna populations in tree plantations used to recover degraded pastures in the Atlantic Rainforest of Antonina, Paraná, Brazil.
260 $c2008
520 $aLarge areas of the Atlantic coastal rainforest have been deforested in the past mainly for agricultural purposes, especially cattle grazing. However, many of these areas are currently underutilized or degraded by overgrazing or intensive use. In the coastal region of Paraná, smallscale buffalo grazing has led to considerable local soil degradation and, with the abandonment of the pastures, the exotic Brachiaria sp. grass spreads and becomes a problem for the restoration of these pastures and for alternative uses, such as palmito (heart-of-palm), native forest regeneration or forestry activities. Therefore, to evaluate the potential of various native tree species in the restoration of these pastures, a trial was established in 2002 at a private reserve of the Sociedade de Proteção da Vida Silvestre (SPVS), near Antonina. The experiment was set up in 4 blocks with 3 replicates and 5 native species, planted in plots of 10 x 16 m. For the present study, two tree species were chosen, both legumes: ingá (Inga sp.) and capororoca (Myrsine sp.). The effect of these treatments on the soil fauna abundance and diversity was investigated using the standard TSBF method (25 x 25 cm blocks) but only in the top-soil horizon (0-10 cm), due to a high water-table. Two samples were taken per plot, with a total of 18 samples in the Myrsine sp. and 14 in the Inga sp. Four earthworm species were found, two exotic megascolecids, Pontoscolex corethrurus (Müller, 1857), and another yet unidentified ocnerodrilid. Total macrofauna group diversity was higher in the Myrsine (11) than Inga (7) sp. plots, and total abundance was also slightly higher (644 vs. 483 indiv. m-2, respectively). Earthworms represented >80% of total abundance, and P. corethrurus predominated, representing 85% of all collected earthworms (973 individuals, including 33 cocoons). The other most abundant fauna were snails, beetles and Millipedes, representing each <10% of total abundance. Principle components and redundancy analyses showed a separation of the sample sites based mainly on soil moisture and earthworm (especially P. corethrurus) abundance, both of which tended to be larger in Myrsine sp. plots.
650 $aSolo
653 $aMacrofauna
653 $aPastagem degradada
653 $aPlantação florestal
653 $aRecuperação
700 1 $aSILVA, V. L. da
700 1 $aNEVES, E. J. M.
700 1 $aCARPANEZZI, A. A.
700 1 $aBROWN, G. G.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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