Data/hora: 24/06/2024 13:00:52

Biblioteca(s): | Embrapa Arroz e Feijão; Embrapa Milho e Sorgo; Embrapa Soja.
Data corrente: | 24/01/2011
Data da última atualização: | 13/01/2014
Autoria: | FAGERIA, N. K.; MOREIRA, A.; COELHO, A. M.
Afiliação: | NAND KUMAR FAGERIA, CNPAF; ADONIS MOREIRA, CNPSO; ANTÔNIO MARCOS COELHO, CNPMS.
Título: | Yield and yield components of upland rice as influenced by nitrogen sources.
Ano de publicação: | 2011
Fonte/Imprenta: | Journal of Plant Nutrition, London, v. 34, n. 3, p. 361-370, 2011.
ISSN: | 0190-4167
DOI: | 10.1080/01904167.2011.536878
Idioma: | Inglês
Conteúdo: | Ammonium sulfate and urea are main sources of nitrogen (N) for annual crop production in developing countries. Two greenhouse experiments were conducted using ammonium sulfate and urea as N sources for upland rice grown on a Brazilian Oxisol. The N rates used were 0, 50, 100, 150, 3000, and 400 kg N kg?1 of soil. Yield and yield components were significantly increased in a quadratic fashion with increasing N rate. Ammonium sulfate X urea interaction was significant for grain yield, shoot dry matter yield, panicle number, plant height and root dry weight, indicating a different response magnitude of these plant parameters to two sources of N. Based on regression equation, maximum grain yield was achieved with the application of 380 mg N kg?1 by ammonium sulfate and 271 mg N kg?1 by urea. Grain yield and yield components were reduced at higher rates of urea (>300 mg kg N) but these plant parameters? responses to ammonium sulfate at higher rates was constant. In the intermediate N rate range (125 to 275 mg kg?1), urea was slightly better compared to ammonium sulfate for grain yield. Grain yield was significantly related with plant height, shoot dry weight, panicle number, grain harvest index and root dry weight. Hence, improving these plant characteristics by using appropriate soil and plant management practices can improve upland rice yield.
Palavras-Chave: | Root dry weight; Shoot dry weight.
Thesagro: | Arroz; Nitrogênio; Oryza sativa.
Thesaurus Nal: | Roots; Shoots; Yield components; Yields.

Categoria do assunto:

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F Plantas e Produtos de Origem Vegetal

URL: | http://ainfo.cnptia.embrapa.br/digital/bitstream/item/94946/1/Yield-and-yield-components-of-upland-rice-as-influenced-by-nitrogen-sources.pdf
Registro original: | Embrapa Soja (CNPSO)

Exemplares:

CNPAF - (30269-1) - UPC - AP - DD - 2011 -  - 2011 - DIS
CNPMS - (23380-1) - UPC - AP - DD -  -  -  - DIS
CNPSO - (32645-1) - UPC - AP - PP - 12012 -  - 12012 - DIS