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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Norte / UEP-Parnaíba. |
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Data corrente: |
23/06/1998 |
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Data da última atualização: |
19/12/2011 |
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Autoria: |
DICK, R. P.; CHRIST, R. A. |
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Título: |
Effects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen. |
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Ano de publicação: |
1995 |
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Fonte/Imprenta: |
Soil Science, v.159, n.6, june, 1995. |
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Idioma: |
Inglês |
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Conteúdo: |
Concerns about the environmental impacts of N management in agroecosystems have increased interest in promoting N efficiency and greater utilization of animal manures, green manures, and legumes in crop rotations. Predicting N dynamics of diferent soil management in short-term studies is difficult because soil properties change slowly. A long-term experiment under a winter wheat-fallow system in the semi-arid region of eastern Oregon provided an opportunity to study the cumulative effects of residue management on the mineralization and plant avilability of N. The treatments, established in 1931, included wheat straw burning, incorporation of straw, manure legume plant residue, or inorganic N. To evaluate N availability to plants, a greenhouse port study was conducted on the treated soils collected form the 0 to 20-cm depth. Ryegrass (Lolium perenne L.) was grown as an indicatro plant for 120 days in 1-kg soil samples treated with different ratres of inorganic N and harvested and analyzed for total N at 30-day intervals. At the control rate, ryegrass dry matter yield (DMY) and n uptake from the manuretreated soil were more than 50% higher than from other residue treatments. When adequate nutrients were applied, soil treated long-term with manure had no DMY advantage over long-term inorganic N treatments. Burning of wheat straw did not significantly influence DMY, although yields from the burned plots tented to be lower. Large accumulations of extractable (>12 mg-N kg-1) in the lower portion of the manuretreated soil suggest a potential for nitrate groundwater contamination. MenosConcerns about the environmental impacts of N management in agroecosystems have increased interest in promoting N efficiency and greater utilization of animal manures, green manures, and legumes in crop rotations. Predicting N dynamics of diferent soil management in short-term studies is difficult because soil properties change slowly. A long-term experiment under a winter wheat-fallow system in the semi-arid region of eastern Oregon provided an opportunity to study the cumulative effects of residue management on the mineralization and plant avilability of N. The treatments, established in 1931, included wheat straw burning, incorporation of straw, manure legume plant residue, or inorganic N. To evaluate N availability to plants, a greenhouse port study was conducted on the treated soils collected form the 0 to 20-cm depth. Ryegrass (Lolium perenne L.) was grown as an indicatro plant for 120 days in 1-kg soil samples treated with different ratres of inorganic N and harvested and analyzed for total N at 30-day intervals. At the control rate, ryegrass dry matter yield (DMY) and n uptake from the manuretreated soil were more than 50% higher than from other residue treatments. When adequate nutrients were applied, soil treated long-term with manure had no DMY advantage over long-term inorganic N treatments. Burning of wheat straw did not significantly influence DMY, although yields from the burned plots tented to be lower. Large accumulations of extractable (>12 mg-N kg-1) in th... Mostrar Tudo |
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Palavras-Chave: |
Nitrate; Underground water. |
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Thesagro: |
Lençol Freático; Lixiviação; Nitrato; Nitrogênio. |
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Thesaurus Nal: |
leaching; nitrogen. |
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Categoria do assunto: |
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Marc: |
LEADER 02233naa a2200229 a 4500
001 1079324
005 2011-12-19
008 1995 bl --- 0-- u #d
100 1 $aDICK, R. P.
245 $aEffects of long-term residue management and nitrogen fertilization on availability and profile distribution of nitrogen.
260 $c1995
520 $aConcerns about the environmental impacts of N management in agroecosystems have increased interest in promoting N efficiency and greater utilization of animal manures, green manures, and legumes in crop rotations. Predicting N dynamics of diferent soil management in short-term studies is difficult because soil properties change slowly. A long-term experiment under a winter wheat-fallow system in the semi-arid region of eastern Oregon provided an opportunity to study the cumulative effects of residue management on the mineralization and plant avilability of N. The treatments, established in 1931, included wheat straw burning, incorporation of straw, manure legume plant residue, or inorganic N. To evaluate N availability to plants, a greenhouse port study was conducted on the treated soils collected form the 0 to 20-cm depth. Ryegrass (Lolium perenne L.) was grown as an indicatro plant for 120 days in 1-kg soil samples treated with different ratres of inorganic N and harvested and analyzed for total N at 30-day intervals. At the control rate, ryegrass dry matter yield (DMY) and n uptake from the manuretreated soil were more than 50% higher than from other residue treatments. When adequate nutrients were applied, soil treated long-term with manure had no DMY advantage over long-term inorganic N treatments. Burning of wheat straw did not significantly influence DMY, although yields from the burned plots tented to be lower. Large accumulations of extractable (>12 mg-N kg-1) in the lower portion of the manuretreated soil suggest a potential for nitrate groundwater contamination.
650 $aleaching
650 $anitrogen
650 $aLençol Freático
650 $aLixiviação
650 $aNitrato
650 $aNitrogênio
653 $aNitrate
653 $aUnderground water
700 1 $aCHRIST, R. A.
773 $tSoil Science$gv.159, n.6, june, 1995.
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Registro original: |
Embrapa Meio Norte / UEP-Parnaíba (CPAMN-UEPP) |
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| Registros recuperados : 6 | |
| 6. |  | BALOTA, E. L.; YADA, I. F. U.; AMARAL, H. F.; NAKATANI, A. S.; HUNGRIA, M.; DICK, R. P.; COYNE, M. S. Soil quality in relation to forest conversion to perennial or annual cropping in southern Brasil. Revista Brasileira de Ciência do Solo, Viçosa, MG, v. 39, n. 4, p. 1003-1014, Jul./Aug. 2015.| Tipo: Artigo em Periódico Indexado | Circulação/Nível: A - 2 |
| Biblioteca(s): Embrapa Soja. |
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| Registros recuperados : 6 | |
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