| Full text | |
| Author(s): Show less - |
Soltangheisi, Amin
[1]
;
de Moraes, Moacir Tuzzin
[1]
;
Cherubin, Mauricio Roberto
[2]
;
Alvarez, Dasiel Obregon
[3]
;
de Souza, Leandro Fonseca
[3]
;
Bieluczyk, Wanderlei
[3]
;
Navroski, Deisi
[3]
;
Bettoni Teles, Ana Paula
[2]
;
Pavinato, Paulo Sergio
[2]
;
Martinelli, Luiz Antonio
[1]
;
Tsai, Siu Mui
[3]
;
de Camargo, Plinio Barbosa
[1]
Total Authors: 12
|
| Affiliation: | [1] Univ Sao Paulo, Dept Ecol Isotop, CENA, Av Centenario 303, BR-13416000 Piracicaba, SP - Brazil
[2] Univ Sao Paulo, Dept Ciencia Solo, ESALQ, Av Padua Dias 11, BR-13418900 Piracicaba, SP - Brazil
[3] Univ Sao Paulo, CENA, Cell & Mol Biol Lab, Av Centenario 303, BR-13416000 Piracicaba, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | SOIL & TILLAGE RESEARCH; v. 194, NOV 2019. |
| Web of Science Citations: | 0 |
| Abstract | |
Understanding the pathways of soil phosphorus (P) transformations and determining the factors related to P nutritional status of soils when land use changes is critical for a better management, especially in Amazon region. We investigated different P fractions and their transformations in different land uses (primary forest and pasture) and soil textures (clayey and sandy) in Amazonian Oxisols using path analysis. Besides P fractionation, phosphatase activity and its correlation with soil carbon (C):organic P (Po) ratio was evaluated to correlate it with soil P nutritional status. After 15 years from forest slashing and burning, total P in pasture reaches to the forest levels in Amazonian soils, regardless of soil texture. Path analysis showed that land use conversion from forest to pasture decreased the diversity of the contribution of P pools to buffer P extracted by anion exchange resin. However, Po accounted for one-fourth of total P in our sites, it plays an important role as source of plant available P and contributed more in pasture compared to forest. Our results from P fractionation and C:Po ratio revealed that Amazonian pastures and forests are not P deficient. We also showed that with increasing C:Po ratio, plant-available P content became more dependent on P mineralization. Soil acid phosphatase activity can be used as an indicator for evaluating soil P nutritional status; however, its range changes according to the land use. (AU) | |
| FAPESP's process: | 17/18327-7 - CH4 production and consumption in the tropical ecosystem through flows, CH4 vertical profiles and 13C and D isotopic compositions |
| Grantee: | Moacir Tuzzin de Moraes |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 16/24695-6 - Spatio-temporal dynamics of the active microbiota on the methane cycling in an Amazonian soil after forest-to-pasture conversion |
| Grantee: | Dasiel Obregón Alvarez |
| Support Opportunities: | Scholarships in Brazil - Doctorate (Direct) |
| FAPESP's process: | 17/11332-5 - Phosphorus dynamics and its fractions in soils under pasture-sugarcane conversion and intensification in pastureland |
| Grantee: | Amin Soltangheisi |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 14/50320-4 - Dimensions US-BIOTA - São Paulo: collaborative research: integrating dimensions of microbial biodiversity across land use change in tropical forests |
| Grantee: | Tsai Siu Mui |
| Support Opportunities: | BIOTA-FAPESP Program - Thematic Grants |