Soil phosphate fractions and microbial biomass in native forest and horticultural areas

This study was carried out to verify if the different phosphate fractions in the soil affect the soil microbial biomass. Soil samples were collected from native forest and horticultural areas, in four municipalities in the Metropolitan Region of Curitiba, Brazil, and evaluated for: carbon (C), nitr...

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Main Authors: Tatiana Suzin Lazeris, Jéssica Pereira de Souza, Fabiane Machado Vezzani, Caroline Lima de Matos, Glaciela Kaschuk
Format: Article
Language:Portuguese
Published: University of Western Sao Paulo, UNOESTE 2021-05-01
Series:Colloquium Agrariae
Subjects:
Online Access:https://revistas.unoeste.br/index.php/ca/article/view/3917
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spelling doaj-5d6eda8fff4942c1b4779e56d50d38072021-05-27T14:55:36ZporUniversity of Western Sao Paulo, UNOESTEColloquium Agrariae1809-82152021-05-01173Soil phosphate fractions and microbial biomass in native forest and horticultural areasTatiana Suzin Lazeris0Jéssica Pereira de Souza1Fabiane Machado Vezzani2Caroline Lima de Matos3Glaciela KaschukUniversidade Federal do Paraná - UFPRUniversidade Federal do Paraná - UFPRUniversidade Federal do Paraná - UFPRUniversidade Federal do Paraná - UFPR This study was carried out to verify if the different phosphate fractions in the soil affect the soil microbial biomass. Soil samples were collected from native forest and horticultural areas, in four municipalities in the Metropolitan Region of Curitiba, Brazil, and evaluated for: carbon (C), nitrogen (N) and phosphorus (P) of microbial biomass (MBC, MBN and MBP, respectively), total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), inorganic phosphorus (iP), organic phosphorus (oP) and available phosphorus (aP. Soil suspensions diluted at 10-4 were spread on plates and phosphate solubilizing bacteria (PSB) were counted. The analyses showed that horticultural areas soils accumulated 43% more TP whereas they lost 23% of TOC and 19% of TN comparing to native areas. 69% of TP in the native areas was organic (oP) whereas 59% of TP in the horticultural areas was inorganic (iP). Horticultural areas had lower numbers of colony forming unities of PSB than native areas.  PSB was positively correlated with the ratio of MBC to TOC (qMic), which in turn, was negatively correlated with TOC and TN. Changes in the soil oP fraction suggested a shift in the soil community bacterial structure and in the values of soil microbial biomass, which may have contributed to lower soil organic matter in the horticultural areas. https://revistas.unoeste.br/index.php/ca/article/view/3917P solubilizing bacteria; soil intensive use; soil organic matter; vegetables production.
collection DOAJ
language Portuguese
format Article
sources DOAJ
author Tatiana Suzin Lazeris
Jéssica Pereira de Souza
Fabiane Machado Vezzani
Caroline Lima de Matos
Glaciela Kaschuk
spellingShingle Tatiana Suzin Lazeris
Jéssica Pereira de Souza
Fabiane Machado Vezzani
Caroline Lima de Matos
Glaciela Kaschuk
Soil phosphate fractions and microbial biomass in native forest and horticultural areas
Colloquium Agrariae
P solubilizing bacteria; soil intensive use; soil organic matter; vegetables production.
author_facet Tatiana Suzin Lazeris
Jéssica Pereira de Souza
Fabiane Machado Vezzani
Caroline Lima de Matos
Glaciela Kaschuk
author_sort Tatiana Suzin Lazeris
title Soil phosphate fractions and microbial biomass in native forest and horticultural areas
title_short Soil phosphate fractions and microbial biomass in native forest and horticultural areas
title_full Soil phosphate fractions and microbial biomass in native forest and horticultural areas
title_fullStr Soil phosphate fractions and microbial biomass in native forest and horticultural areas
title_full_unstemmed Soil phosphate fractions and microbial biomass in native forest and horticultural areas
title_sort soil phosphate fractions and microbial biomass in native forest and horticultural areas
publisher University of Western Sao Paulo, UNOESTE
series Colloquium Agrariae
issn 1809-8215
publishDate 2021-05-01
description This study was carried out to verify if the different phosphate fractions in the soil affect the soil microbial biomass. Soil samples were collected from native forest and horticultural areas, in four municipalities in the Metropolitan Region of Curitiba, Brazil, and evaluated for: carbon (C), nitrogen (N) and phosphorus (P) of microbial biomass (MBC, MBN and MBP, respectively), total organic carbon (TOC), total nitrogen (TN), total phosphorus (TP), inorganic phosphorus (iP), organic phosphorus (oP) and available phosphorus (aP. Soil suspensions diluted at 10-4 were spread on plates and phosphate solubilizing bacteria (PSB) were counted. The analyses showed that horticultural areas soils accumulated 43% more TP whereas they lost 23% of TOC and 19% of TN comparing to native areas. 69% of TP in the native areas was organic (oP) whereas 59% of TP in the horticultural areas was inorganic (iP). Horticultural areas had lower numbers of colony forming unities of PSB than native areas.  PSB was positively correlated with the ratio of MBC to TOC (qMic), which in turn, was negatively correlated with TOC and TN. Changes in the soil oP fraction suggested a shift in the soil community bacterial structure and in the values of soil microbial biomass, which may have contributed to lower soil organic matter in the horticultural areas.
topic P solubilizing bacteria; soil intensive use; soil organic matter; vegetables production.
url https://revistas.unoeste.br/index.php/ca/article/view/3917
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