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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Forest conversion to pasture affects soil phosphorus dynamics and nutritional status in Brazilian Amazon

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Author(s):
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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