Data/hora: 21/06/2024 18:26:29

Biblioteca(s): | Embrapa Pantanal.
Data corrente: | 28/09/1995
Data da última atualização: | 28/09/1995
Autoria: | MANDAL, L. N.; KHAN, S. K.
Título: | Transformation of fixed phosphorus in soils under waterlogged condition.
Ano de publicação: | 1977
Fonte/Imprenta: | Journal Indian Society of Soil Science, v.25, n.2, p.122-128, 1977.
Idioma: | Inglês

Conteúdo:

Sixty to seventy-five per cent of the amount of the applied phosphate was found to remain in soil in the fixed form as Al-Fe- and Ca- phosphate after the harvest of rice plants. Expe-
riment was conducted to study the transformation of such fixed P in soil during the period
when the soils are re-waterlogged in the following cropping season after an interving dry
fallow period for about 5 months. The overall results indicated that the applied P which 
was left in the soil fixed from after the crop harvest could significantly contribute to the
pool of avail. P in the succeeding season during the initial period of plant growth. The 
amount of fixed Al-P did not practically record any change on re-waterlogging the soil in
the next season, particularly during the initial period. The fixed Fe-P recorded a decrease
immediately after re-waterlogging the soils having high P-fixing capacity, whereas in low 
fixing soil it remained practically unchanged. The fixed Ca-P recored a gradual increase in
the soil rich in native Ca-P but showed a slow decreased in the soil comparatively poor in
this fraction of P.

Palavras-Chave: | Disponibilidade; P availability; Re-waterlogging; Transformation of added P.
Thesagro: | Fósforo; Solo.
Thesaurus Nal: | soil.
Categoria do assunto: | --
Registro original: | Embrapa Pantanal (CPAP)
Exemplares: | CPAP - (29963-1) - ADD - SP - -- - SP1323 -  - 1323 - DIS