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Registro Completo |
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Biblioteca(s): |
Embrapa Agrobiologia; Embrapa Pantanal. |
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Data corrente: |
27/06/1995 |
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Data da última atualização: |
29/01/1996 |
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Autoria: |
WILLIAMS, W. A. |
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Título: |
The role of the Leguminosae in pasture and soil improvement in the neotropics. |
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Ano de publicação: |
1967 |
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Fonte/Imprenta: |
Tropical Agriculture, v.44, n.2, p.103-115, Apr. 1967. |
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Idioma: |
Inglês
Português |
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Conteúdo: |
The present use of tropical legumes in the western hemisphere is evaluated, and profita-
ble areas for further investigation and development are outlined. Studies of soil organic
matter from sites ranging from 4 to 20 N latitude show that many tropical soils developed
under forest are well supplied with humus, and the use of Leguminosae for their nitrogen-
fixing ability is not justified until the nitrogen-supplying power of the soil declines substanti-
ally should be considered along with alternate sources of nitrogen since grassland soils have a very limited nitrogen-supplying power. The use of legumes for pasture and forage
crops merits special attention wherever there is an annual dry season that stops the
growth of forage grasses, thus reducing their protein below livestock requirements. Several promising legumes are being studied, and some are being planted commercially
on a limited scale, e.g. Centrosema pubescens, Glycine javanica, Leucaena glauca, Lo-
tononis bainesii, Phaseolus atropurpureus, Pueraria phaseoloides, and Stylosanthes gracilis. A useful role for legumes purely for soil improvement requires more extensive, po-
sitive evidence. An exception is the use of leguminous green manure in the production of
paddy rice, where the reduced condition of the flooded soil provides a special advantage
in higly efficient nitrogen use. Soil improvement by legumes is also a worthwhile adjunct to
their use primarily for pasture production or for shade in shade-grown crops. The symbiotic
nitrogen-fixing ability of tropical legumes has received little attention in neotropical micro-
biology thus far. Investigation in this area will be rewarding for both practical and theore-
tical aspects of rhizobial biology. MenosThe present use of tropical legumes in the western hemisphere is evaluated, and profita-
ble areas for further investigation and development are outlined. Studies of soil organic
matter from sites ranging from 4 to 20 N latitude show that many tropical soils developed
under forest are well supplied with humus, and the use of Leguminosae for their nitrogen-
fixing ability is not justified until the nitrogen-supplying power of the soil declines substanti-
ally should be considered along with alternate sources of nitrogen since grassland soils have a very limited nitrogen-supplying power. The use of legumes for pasture and forage
crops merits special attention wherever there is an annual dry season that stops the
growth of forage grasses, thus reducing their protein below livestock requirements. Several promising legumes are being studied, and some are being planted commercially
on a limited scale, e.g. Centrosema pubescens, Glycine javanica, Leucaena glauca, Lo-
tononis bainesii, Phaseolus atropurpureus, Pueraria phaseoloides, and Stylosanthes gracilis. A useful role for legumes purely for soil improvement requires more extensive, po-
sitive evidence. An exception is the use of leguminous green manure in the production of
paddy rice, where the reduced condition of the flooded soil provides a special advantage
in higly efficient nitrogen use. Soil improvement by legumes is also a worthwhile adjunct to
their use primarily for pasture production or for shade in shade-grown crops.... Mostrar Tudo |
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Palavras-Chave: |
Leguminous. |
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Thesagro: |
Leguminosa; Pastagem; Solo. |
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Thesaurus Nal: |
soil. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02218naa a2200181 a 4500
001 1787009
005 1996-01-29
008 1967 bl --- 0-- u #d
100 1 $aWILLIAMS, W. A.
245 $aThe role of the Leguminosae in pasture and soil improvement in the neotropics.
260 $c1967
520 $aThe present use of tropical legumes in the western hemisphere is evaluated, and profita- ble areas for further investigation and development are outlined. Studies of soil organic matter from sites ranging from 4 to 20 N latitude show that many tropical soils developed under forest are well supplied with humus, and the use of Leguminosae for their nitrogen- fixing ability is not justified until the nitrogen-supplying power of the soil declines substanti- ally should be considered along with alternate sources of nitrogen since grassland soils have a very limited nitrogen-supplying power. The use of legumes for pasture and forage crops merits special attention wherever there is an annual dry season that stops the growth of forage grasses, thus reducing their protein below livestock requirements. Several promising legumes are being studied, and some are being planted commercially on a limited scale, e.g. Centrosema pubescens, Glycine javanica, Leucaena glauca, Lo- tononis bainesii, Phaseolus atropurpureus, Pueraria phaseoloides, and Stylosanthes gracilis. A useful role for legumes purely for soil improvement requires more extensive, po- sitive evidence. An exception is the use of leguminous green manure in the production of paddy rice, where the reduced condition of the flooded soil provides a special advantage in higly efficient nitrogen use. Soil improvement by legumes is also a worthwhile adjunct to their use primarily for pasture production or for shade in shade-grown crops. The symbiotic nitrogen-fixing ability of tropical legumes has received little attention in neotropical micro- biology thus far. Investigation in this area will be rewarding for both practical and theore- tical aspects of rhizobial biology.
650 $asoil
650 $aLeguminosa
650 $aPastagem
650 $aSolo
653 $aLeguminous
773 $tTropical Agriculture$gv.44, n.2, p.103-115, Apr. 1967.
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Embrapa Pantanal (CPAP) |
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