Formas de fósforo em solos de uma toposequência de Viçosa, Zona da Mata, Minas Gerais
Palavras-chave:
fósforo orgânico, formas inorgânicas, fracionamento fósforo, solos toposequência, análises químicasResumo
This research was conductes in order to obtain data about phosphorus forms and contents in soil plotted in a topographic sequence at Viçosa, Minas Gerais. Samples of open profile horizons were taken following a topographic sequence, and determinations of inorganic phosphorus fractions were made for these samples. Fractions separated were as fractions: water soluble forms, forms adsorbed on aluminum, form adsorbed on iron, forms soluble in a reducing agent, and forms occluded in iron and aluminum.
Referências
BUOL, S. W., HOLF, F. D. & McCRACKEN, R.. J. Soil genesis and classification. Ames, Iowa State University Press, 1963. 360 p.
BRAGA, J. M. & DEFELIPO, B. V. Relações entre as formas de fósforo inorgânico, fósforo disponível e material vegetal em solos sob vegetação de cerrado. L. Trabalhos de laboratório. Rev. Ceres, 19(102):124-136. 1972.
BRAGA, J. M. & DEFELIPO, B. V. Determinação espectrofotométrica de fósforo em extratos de solo e material vegetal. Rev. Ceres, 21(113):73-85. 1974.
CABALLA, P. R. & FASSBENDER, H. W. Formas del fosforo em suelos de la región cacaotera de Bahia, Brasil. Turrialba 20(4):439-444. 1970.
CHANG, S. C. & JACKSON, M. L. Fractionation of soil phosphorus. Soil Science 84(2):133-144. 1957.
CHAMPAN, H. D. & PRATT, P. F. Methods of analysis for soils, plants and waters. Davis, University of California, 1961. 309 p.
FASSBENDER, H. W. Formas de los fosfatos em algunos de la Zona Oriental de la Maseta Central y de las llanuras atlânticas de Costa Rica, Fitotecnia Latino-americana 3(1-2):187-202. 1966.
FASSBENDER, H. W. & DIAZ, N. Contenido y formas de fosforo en algunos suelos de la region amazonica del Estado de Maranhão, Brasil. Turrialba 20(3): 372-374. 1970.
FIFE, C. V. An evaluation of ammonium fluoride as a selective extractants for aluminum — bound soil phosphate. I. Preliminary studies on non-soil systems. Soil Science 87(1):13-21. 1959.
FIFE, C. V. An evaluation of ammoium fluoride as selective extractant for aluminum — bound soil phosphate. II. Preliminary studies on soils. Soil Science 87(2):83-88. 1959.
FIFE, C. V. An evaluation of ammonium fluoride as a selective extractant for aluminum — bound phosphate. III. Detailed studies on selected soils (1). Soil Science 93(2):113-123. 1962.
FIFE, C. V. An evaluation of ammonium fluoride as a selective extractant for aluminum — bound soil phosphate. IV. Detaliled studies on soil. Soil Science 96(2):112-120. 1963.
FLOATE, M. J. S. Distribution of organic matter and phosphorus fractions in a topographic sequence of soils in Southern British Columbia. Canadian Journal of Soil Science 45(3):323-329. 1965.
GLENN, R. C., HSU, P. H. & JACKSON, M. L. Flow sheet for soil phosphate fractionation. Agron. Abstr., Madison. 1959. p. 9.
GOEDERT, W. J., PATELLA, J. F. & MORAES, J. F. V. Formas de fosforo num planossolo do Rio Grande do Sul e sua disponibilidade para a cultura do arroz irrigado. Pesquisa Agropecuária Brasileira 6:39-43. 1971.
HAWKINS, R. H. & KUNZE, G. W. Phosphate fractions in some Texas Grumossolos and their relation to soil weathering and available phosphorus. Soil Science Society of America Proceeding 29(6):650-656. 1965.
HSU, P. H. & JACKSON, M. L. Inorganic phosphate transformations by chemical weathering in soils as influenced by pH. Soil Science 90(1):16-24. 1960.
JOHN, M. K. The distribution of organic phosphorus in some soils of westerns Canada and its relationships to soil characteristcs. Soil Science and Plant Nutrition 17(1):9-14. 1971.
JUO, A. S. R. & ELLIS, B. C. Particle size distribution of aluminum, iron and calcium phosphorus in soil profiles. Soil Science 106(5):180-374. 1968.
KHIN, A. & LEEPER, G. W. Modification in CHANG and JACKSON'S procedure for fractionating soil phosphorus. Agrochimica 4:246-254. 1960.
REZENDE, S. B. Estudos de crono-toposequência em Viçosa, Minas Gerais, Viçosa, U.F.V., Imprensa Universitária, 1971, 71 p. (Tese M.S.).
SMITH, A. N. Distinction betweem iron and aluminum phosphate in CHANG and JACKSON’S procedure for fractionation inorganic soil phosphorus. Agrochimica 9(2):162-168. 1965.
SMITH, A. N. Fractionation of inorganic phosphorus in soil the CHANG and JACKSON'S fractionation procedure its limitation and uses. Agri Digest 17: 10-19. 1970.
SYERS, J. K. & WALKER, T. W. Phosphorus transformations in a chronosequence of soils developed on windblown sand in New Zealand. I. Total and organic phosphorus, Journal of Soil Science 20(1):57-64. 1969.
VIEIRA, C. S. & BORNEMISZA, E. Categoria de fosforo en los principales grandes grupos de suelos en la Amazonia de Brasil. Turrialba 18(3):242-248. 1968.
WESTIN, F. C. & BRITO, J. C. Phosphorus fractions of some Venezuelan soil as related to their stage of weathering. Soil Science 107(3):194-202. 1969.
WILLIAMS, J. D. H., SYERS, J. K. & WALKER, T. W. Fractionation of soil inorganic phosphate by a modification of CHANG and JACKSON'S procedure. Soil Science Society of American Proceedings 31(6):736-739. 1967.
