Please use this identifier to cite or link to this item: http://www.alice.cnptia.embrapa.br/alice/handle/doc/953592
Research center of Embrapa/Collection: Embrapa Arroz e Feijão - Artigo em periódico indexado (ALICE)
Date Issued: 2012
Type of Material: Artigo em periódico indexado (ALICE)
Authors: NASCENTE, A. S.
CRUSCIOL, C. A. C.
COBUCCI, T.
Additional Information: ADRIANO STEPHAN NASCENTE, CNPAF; CARLOS ALEXANDRE COSTA CRUSCIOL., UNESP, Botucatu-SP; TARCISIO COBUCCI, CNPAF.
Title: Ammonium and nitrate in soil and upland rice yield as affected by cover crops and their desiccation time.
Publisher: Pesquisa Agropecuária Brasileira, Brasília, DF, v. 47, n. 12, p. 1699-1706, dez. 2012.
Language: en
Description: The objective of this work was to evaluate the effect of cover crops and their desiccation times on upland rice yield and on the levels of nitrate and ammonium in a no.tillage soil. The experiment was carried out in a randomized blocks, with split plots and three replicates. Cover crops (plots) were sowed in the off season (March 2009). In November 2009, at 30, 20, 10 and 0 days before rice sowing (split plots), herbicide was applied on the cover crops (fallow, Panicum maximum, Urochloa ruziziensis, U. brizantha and millet). Straw and soil were sampled (0.10 cm) at the sowing day, and after 7, 14, 21, 28 and 35 days. Straws from millet and fallow were degraded more rapidly and provided the lowest level of nitrate in the soil. Urochloa ruziziensis, U. brizantha and P. maximum produced higher amounts of dry matter, and provided the highest levels of nitrate in the soil. Millet provides the lowest nitrate/ammonium ratio and the highest upland rice yield. Desiccations carried out at 30 and 20 days before sowing had the largest levels of nitrate in the soil at the sowing date. Nitrogen content and forms in the soil are affected by cover crops and their desiccation times.
Thesagro: Arroz
Oryza sativa
Panicum maximum
Milheto
Planta de cobertura
Desidratação
Nitrato
Amônia
NAL Thesaurus: Urochloa ruziziensis.
Urochloa brizantha
Data Created: 2013-03-20
Appears in Collections:Artigo em periódico indexado (CNPAF)

Files in This Item:
File Description SizeFormat 
04.pdf998,74 kBAdobe PDFThumbnail
View/Open

FacebookTwitterDeliciousLinkedInGoogle BookmarksMySpace