Bioavailability of phosphorus on highly weathered Oxisoils of the Brazilian Mid-West.
Soils from mid-west Brazil show strong phosphorus (P) fixation, which can reduce the efficiency of P fertilizers. Under this condition, soil competes with the plant for the applied P adsorbing it strongly in its mineral fraction. Nevertheless, in areas where crops are grown and fertilizers are added for many years, soil fertility status has increased over time, making these soils nonresponsive to P. The objective of this study was to evaluate how P availability changes with soil use. Forty soil samples were collected under different types of land use: native forest, pasture, no-tillage, and areas with periodic tillage. P fractionation was performed to determine the amount of P in the organic and inorganic fractions with high, medium, and low lability under each land use. Corn was cultivated in a greenhouse experiment to evaluate P uptake and values correlated with different P fractions. The results showed differences in the P fraction relations among different land uses. Cultivated areas (no tillage and periodic tillage) accumulated greater amounts of P in all fractions than pastures and the native forest. A higher proportion of labile organic P was observed under no tillage than under periodic tillage. NaHCO3 and NaOH 0.1 mol L-1were the most relevant P fractions for shoot P uptake. No tillage promoted the accumulation of available P fractions, suggesting that it is a good management strategy to ensure fertilizer use efficiency
Main Authors: | SITTA NETO, E., DAL MOLIN, S. J., SITTA, C., BOLDRIN, P. F., BENITES, V. de M. |
---|---|
Other Authors: | ERNESTO SITTA NETO, UNIRV; SULIAN JUNKES DAL MOLIN, SLC AGRÍCOLA; CASSIO SITTA, UNIRV; PAULO FERNANDES BOLDRIN, UNIRV; VINICIUS DE MELO BENITES, CNPS. |
Format: | Artigo de periódico biblioteca |
Language: | Ingles English |
Published: |
2022-01-11
|
Subjects: | Oxisol, Fósforo, Plantio Direto, Uso da Terra, Phosphorus, No-tillage, Land use, |
Online Access: | http://www.alice.cnptia.embrapa.br/alice/handle/doc/1139009 https://doi.org/10.35410/IJAEB.2021.5664 |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Similar Items
-
Fósforo "extraível" em função de históricos de uso e doses de fósforo em um latossolo cultivado com feijoeiro e braquiaria.
by: CARNEIRO, L. F., et al.
Published: (2011-08-10T11:11:11Z) -
Agronomic response to different doses and forms of application of organomineral phosphate fertilizer produced with chicken manure.
by: SÁ, J. M. e, et al.
Published: (2019-11-25) -
Soil structural properties under addition of crop residues and limestone.
by: LEMAINSKI, J., et al.
Published: (2019-11-25) -
Phosphorus fraction in a yellow latosol cropped under no-tilage system in the brazilian Amazon.
by: BRASIL, E. C., et al.
Published: (2020-10-27) -
Conversion of Cerrado into agricultural land in the south-western amazon: carbon stocks and soil fertility.
by: CARVALHO, J. L. N., et al.
Published: (2009-04-27)