| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Pantanal. |
|
Data corrente: |
17/05/1996 |
|
Data da última atualização: |
17/05/1996 |
|
Autoria: |
VERMA, K. S.; ABROL, I. P. |
|
Título: |
Effects of gypsum and pyrites on soil properties in a highly sodic soil. |
|
Ano de publicação: |
1980 |
|
Fonte/Imprenta: |
Indian Journal of Agricultural Sciences, v.50, n.11, p.844-852, Nov.1980. |
|
Idioma: |
Inglês |
|
Conteúdo: |
Ina field experiment conducted on a higly sodic soil, Aquic Natrustalf, gypsum @ 0, 7.1, 14.2, 21.3 and 28.4 tonnes/ha and pyrites @ 0, 3.6, 7.2, 10.8 and 14.4 tonnes/ha, cor- responding to 0, 25, 50, 75 and 100% of laboratory gypsum requirement of 0-15 cm, were surface-mixed. Rice (Oryza sativa Linn.) and wheat (Triticum astivum Linn. emend. Thell.) were grown in succession. The effect of treatments was studied on the changes in soil properties after growing rice and wheat crops. Improvement in the soil properties with the application of gypsum was always greater than with pyrites at all the levels. Application of gypsum not only directly supplied soluble calcium but also resulted in greater solubilization of soil calcium carbonate, as shown by greater build up of exchangeable calcium + mag- nesium. The pyrites containing 31.1% sulphur was only about one-fourth as effective as gypsum when compared on chemical equaivalent basis. The relative ineffectiveness of pyrites was owing to the neutrlization of acid by soluble carbonates and other soil consti- tuents and also to the lack of its further oxidation once incorporated in a sodic soil having high pH. A high degree of correlation between pH and exchangeable sodium percentage and between ESP and such soil physical properties as dispersion and infiltration indicated that pH could be used as a fair measure of soil sodicity. |
|
Palavras-Chave: |
Pirita; Sodic soil. |
|
Thesagro: |
Arroz; Gesso; Oryza Sativa; Solo; Trigo; Triticum Aestivum. |
|
Thesaurus Nal: |
gypsum; pyrite; rice; wheat. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 02079naa a2200277 a 4500
001 1788441
005 1996-05-17
008 1980 bl --- 0-- u #d
100 1 $aVERMA, K. S.
245 $aEffects of gypsum and pyrites on soil properties in a highly sodic soil.
260 $c1980
520 $aIna field experiment conducted on a higly sodic soil, Aquic Natrustalf, gypsum @ 0, 7.1, 14.2, 21.3 and 28.4 tonnes/ha and pyrites @ 0, 3.6, 7.2, 10.8 and 14.4 tonnes/ha, cor- responding to 0, 25, 50, 75 and 100% of laboratory gypsum requirement of 0-15 cm, were surface-mixed. Rice (Oryza sativa Linn.) and wheat (Triticum astivum Linn. emend. Thell.) were grown in succession. The effect of treatments was studied on the changes in soil properties after growing rice and wheat crops. Improvement in the soil properties with the application of gypsum was always greater than with pyrites at all the levels. Application of gypsum not only directly supplied soluble calcium but also resulted in greater solubilization of soil calcium carbonate, as shown by greater build up of exchangeable calcium + mag- nesium. The pyrites containing 31.1% sulphur was only about one-fourth as effective as gypsum when compared on chemical equaivalent basis. The relative ineffectiveness of pyrites was owing to the neutrlization of acid by soluble carbonates and other soil consti- tuents and also to the lack of its further oxidation once incorporated in a sodic soil having high pH. A high degree of correlation between pH and exchangeable sodium percentage and between ESP and such soil physical properties as dispersion and infiltration indicated that pH could be used as a fair measure of soil sodicity.
650 $agypsum
650 $apyrite
650 $arice
650 $awheat
650 $aArroz
650 $aGesso
650 $aOryza Sativa
650 $aSolo
650 $aTrigo
650 $aTriticum Aestivum
653 $aPirita
653 $aSodic soil
700 1 $aABROL, I. P.
773 $tIndian Journal of Agricultural Sciences$gv.50, n.11, p.844-852, Nov.1980.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Pantanal (CPAP) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Corte. Para informações adicionais entre em contato com cnpgc.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Gado de Corte. |
|
Data corrente: |
19/06/1998 |
|
Data da última atualização: |
11/07/2007 |
|
Autoria: |
VALERIO, J. R.; SOUZA, A. P. de. |
|
Afiliação: |
EMBRAPA. Centro Nacional de Pesquisa de Gado de Corte (Campo Grande, MS). |
|
Título: |
Screeming tropical forage grasses for resistance the spittlebugs (Homoptera: Cercopidae). |
|
Ano de publicação: |
1997 |
|
Fonte/Imprenta: |
In: INTERNATIONAL GRASSLAND CONGRESS, 18., 1997, Winnipeg, Saskatoon. Proceedings... [S.l.: s.n., 1997?]. |
|
Páginas: |
p. 13-15 / 13-16. |
|
Idioma: |
Inglês |
|
Notas: |
CNPGC. |
|
Conteúdo: |
Spittlebugs are the most damaging pasture pests in tropical America where extensive monocultures of Signal grasses, especially Brachiaria decumbens cv. Basilisk, have favored the buildup of spittlebug populations. Under severe spittlebug attack, the entire above-ground portion of the plant dries and eventually dies, thereby reducing the carrying capacity of infested pastures. Host plant resistance is a low-cost method of controlling spittlebugs. High level of spittlebug resistance is found in the cultivar Marandu (B. brizantha), but it requires more fertile soils. Brachiaria gerrnoplasm is being screened for spittlebug resistance. In the present study, 30 introductions of Brachiaria were evaluated for resistance to the spittlebug Zulia entreriana, based on the parameters: nymphal survival and nymphal period. The introduction CIAT 16309, a B. brizantha, was the only one selected as resistant in this test. Other 424 introductions and hybrids have already been screened. As a result 23 introductions and seven hybrids were found resistant. |
|
Palavras-Chave: |
Basilisk; Cigarrinha-das-pastagens; Marandu; Selection; Spittlebugs; Variedade resistante. |
|
Thesagro: |
Brachiaria Brizantha; Brachiaria Decumbens; Pastagem; Seleção; Zulia Entreriana. |
|
Thesaurus NAL: |
pest resistance. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01929naa a2200301 a 4500
001 1321509
005 2007-07-11
008 1997 bl uuuu u00u1 u #d
100 1 $aVALERIO, J. R.
245 $aScreeming tropical forage grasses for resistance the spittlebugs (Homoptera$bCercopidae).
260 $c1997
300 $ap. 13-15 / 13-16.
500 $aCNPGC.
520 $aSpittlebugs are the most damaging pasture pests in tropical America where extensive monocultures of Signal grasses, especially Brachiaria decumbens cv. Basilisk, have favored the buildup of spittlebug populations. Under severe spittlebug attack, the entire above-ground portion of the plant dries and eventually dies, thereby reducing the carrying capacity of infested pastures. Host plant resistance is a low-cost method of controlling spittlebugs. High level of spittlebug resistance is found in the cultivar Marandu (B. brizantha), but it requires more fertile soils. Brachiaria gerrnoplasm is being screened for spittlebug resistance. In the present study, 30 introductions of Brachiaria were evaluated for resistance to the spittlebug Zulia entreriana, based on the parameters: nymphal survival and nymphal period. The introduction CIAT 16309, a B. brizantha, was the only one selected as resistant in this test. Other 424 introductions and hybrids have already been screened. As a result 23 introductions and seven hybrids were found resistant.
650 $apest resistance
650 $aBrachiaria Brizantha
650 $aBrachiaria Decumbens
650 $aPastagem
650 $aSeleção
650 $aZulia Entreriana
653 $aBasilisk
653 $aCigarrinha-das-pastagens
653 $aMarandu
653 $aSelection
653 $aSpittlebugs
653 $aVariedade resistante
700 1 $aSOUZA, A. P. de
773 $tIn: INTERNATIONAL GRASSLAND CONGRESS, 18., 1997, Winnipeg, Saskatoon. Proceedings... [S.l.: s.n., 1997?].
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Gado de Corte (CNPGC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Nenhum registro encontrado para a expressão de busca informada. |
|
|
