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| 1. |  | PALM, C. A.; NOORDWIJK, M. van; WOOMER, P. L.; ALEGRE, J. C.; ARÉVALO, L.; CASTILLA, C. E.; CORDEIRO, D. G.; HAIRIAH, K.; KOTTO-SAME, J.; MOUKAM, A.; PARTON, W. J.; RICSE, A.; RODRIGUES, V. G. S.; SITOMPU, S. M. Carbon losses and sequestration with land use change in the humid tropics. In: PALM, C. A.; VOSTI, S. A.; SANCHEZ, P. A.; ERICKSEN, P. J. (ed.). Slash-and-burn agriculture: the search for alternatives. New York: Columbia University Press, 2005. cap. 2, p. 41-63.| Biblioteca(s): Embrapa Acre. |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Arroz e Feijão. Para informações adicionais entre em contato com cnpaf.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Arroz e Feijão. |
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Data corrente: |
26/12/2001 |
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Data da última atualização: |
04/04/2022 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
FAGERIA, N. K.; BARBOSA FILHO, M. P. |
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Afiliação: |
NAND KUMAR FAGERIA, CNPAF; MOREL PEREIRA BARBOSA FILHO, CNPAF. |
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Título: |
Nitrogen use efficiency in lowland rice genotypes. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
Communications in Soil Science and Plant Analysis, v. 32, n. 13/14, p. 2079-2089, 2001. |
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DOI: |
10.1081/CSS-120000270 |
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Idioma: |
Inglês |
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Conteúdo: |
Nitrogen (N) is one of the most yield-limiting nutrients in lowland rice production around the world. Use of N efficient genotypes is an important complementary strategy in improving rice yield and reducing cost of production. A greenhouse experiment was conducted at the Embrapa Rice & Beans, Santo Antonio de Goiás, Brazil, with the objective to evaluate N use efficiency of eight lowland (Oryza sativa L.) genotypes. The soil used in the experiment was an Inceptisol and two N levels used were without N application (low level) and an application of 304 mg N kg-1 of soil (high level). Grain yield and yield components and N uptake parameters were significantly affected by genotype and N treatments except the N uptake in shoot. On the basis of N-use efficiency (mg grain weight/mg N accumulated in shoot and grain) and grain yield at zero N, genotypes were classified as efficient and responsive (ER), efficient and nonresponsive (ENR), nonefficient and responsive (NER), and nonefficient and nonresponsive (NENR). Genotypes Rio Formoso, CNA 7550, and CNA 7556 were classified as ER, and genotypes Javaé and CNA 6343 were classified as ENR. In the group, NER was classified genotype CNA 7857. In the group, NENR were falled genotypes CNA 8319 and CNA 8619. From a practical point of view, genotypes which produce high grain yield in a low level of N and respond well to added N are the most desirable because they are able to express their high yield potential in a wide range of N environment. Correlation analysis showed that shoot dry weight, number of panicles, number of grains per panicle, grain harvest index, N uptake in shoot and grain, N harvest index, and N use efficiency having significant positive association with grain yield. MenosNitrogen (N) is one of the most yield-limiting nutrients in lowland rice production around the world. Use of N efficient genotypes is an important complementary strategy in improving rice yield and reducing cost of production. A greenhouse experiment was conducted at the Embrapa Rice & Beans, Santo Antonio de Goiás, Brazil, with the objective to evaluate N use efficiency of eight lowland (Oryza sativa L.) genotypes. The soil used in the experiment was an Inceptisol and two N levels used were without N application (low level) and an application of 304 mg N kg-1 of soil (high level). Grain yield and yield components and N uptake parameters were significantly affected by genotype and N treatments except the N uptake in shoot. On the basis of N-use efficiency (mg grain weight/mg N accumulated in shoot and grain) and grain yield at zero N, genotypes were classified as efficient and responsive (ER), efficient and nonresponsive (ENR), nonefficient and responsive (NER), and nonefficient and nonresponsive (NENR). Genotypes Rio Formoso, CNA 7550, and CNA 7556 were classified as ER, and genotypes Javaé and CNA 6343 were classified as ENR. In the group, NER was classified genotype CNA 7857. In the group, NENR were falled genotypes CNA 8319 and CNA 8619. From a practical point of view, genotypes which produce high grain yield in a low level of N and respond well to added N are the most desirable because they are able to express their high yield potential in a wide range of N environment.... Mostrar Tudo |
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Thesagro: |
Arroz; Cerrado; Genótipo; Nitrogênio; Oryza Sativa. |
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Thesaurus NAL: |
nitrogen; rice. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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Marc: |
LEADER 02388naa a2200229 a 4500
001 1209184
005 2022-04-04
008 2001 bl uuuu u00u1 u #d
024 7 $a10.1081/CSS-120000270$2DOI
100 1 $aFAGERIA, N. K.
245 $aNitrogen use efficiency in lowland rice genotypes.$h[electronic resource]
260 $c2001
520 $aNitrogen (N) is one of the most yield-limiting nutrients in lowland rice production around the world. Use of N efficient genotypes is an important complementary strategy in improving rice yield and reducing cost of production. A greenhouse experiment was conducted at the Embrapa Rice & Beans, Santo Antonio de Goiás, Brazil, with the objective to evaluate N use efficiency of eight lowland (Oryza sativa L.) genotypes. The soil used in the experiment was an Inceptisol and two N levels used were without N application (low level) and an application of 304 mg N kg-1 of soil (high level). Grain yield and yield components and N uptake parameters were significantly affected by genotype and N treatments except the N uptake in shoot. On the basis of N-use efficiency (mg grain weight/mg N accumulated in shoot and grain) and grain yield at zero N, genotypes were classified as efficient and responsive (ER), efficient and nonresponsive (ENR), nonefficient and responsive (NER), and nonefficient and nonresponsive (NENR). Genotypes Rio Formoso, CNA 7550, and CNA 7556 were classified as ER, and genotypes Javaé and CNA 6343 were classified as ENR. In the group, NER was classified genotype CNA 7857. In the group, NENR were falled genotypes CNA 8319 and CNA 8619. From a practical point of view, genotypes which produce high grain yield in a low level of N and respond well to added N are the most desirable because they are able to express their high yield potential in a wide range of N environment. Correlation analysis showed that shoot dry weight, number of panicles, number of grains per panicle, grain harvest index, N uptake in shoot and grain, N harvest index, and N use efficiency having significant positive association with grain yield.
650 $anitrogen
650 $arice
650 $aArroz
650 $aCerrado
650 $aGenótipo
650 $aNitrogênio
650 $aOryza Sativa
700 1 $aBARBOSA FILHO, M. P.
773 $tCommunications in Soil Science and Plant Analysis$gv. 32, n. 13/14, p. 2079-2089, 2001.
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