<b>Comparison of methods to quantify soil microbial biomass carbon
Soil microorganism biomass is an important soil quality indicator. The microbial biomass of soil was determined by killing and lysing the soil microbes by fumigation with chloroform, irradiation with gamma rays, or irradiation with microwaves. Four soils with increasing carbon concentrations (5, 10,...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Eduem (Editora da Universidade Estadual de Maringá)
2018-08-01
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| Series: | Acta Scientiarum: Agronomy |
| Subjects: | |
| Online Access: | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39451 |
| _version_ | 1818913248439697408 |
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| author | Rafael Thomaz de Aquino Moura Marlon da Silva Carrido Carla da Silva Sousa Rômulo Simões Cezar Menezes Everardo Valadares de Sá Barretto Sampaio |
| author_facet | Rafael Thomaz de Aquino Moura Marlon da Silva Carrido Carla da Silva Sousa Rômulo Simões Cezar Menezes Everardo Valadares de Sá Barretto Sampaio |
| author_sort | Rafael Thomaz de Aquino Moura |
| collection | DOAJ |
| description | Soil microorganism biomass is an important soil quality indicator. The microbial biomass of soil was determined by killing and lysing the soil microbes by fumigation with chloroform, irradiation with gamma rays, or irradiation with microwaves. Four soils with increasing carbon concentrations (5, 10, 15, and 30 g kg-1) were analyzed using four methods: the direct application of chloroform, chloroform fumigation, microwave irradiation, and gamma ray irradiation with radiation doses of 15, 25, 35, 45, and 60 KGy. The fungi and bacteria in the soil were quantified by plate counting. Microwave irradiation and gamma irradiation with doses equal to or above 25 KGy killed all the soil microorganisms, but the chloroform methods did not. The carbon liberation increased with higher gamma doses, while the microbe mortality rates were the same, indicating that carbon was liberated from organic matter sources other than microorganisms. The biomasses determined by the microwave method correlated with those determined by the fumigation and 25 KGy gamma irradiation methods, but their values differed among all methods for at least one soil type. Despite this discrepancy, all methods were consistent in ranking microbial biomasses in increasing order of soil carbon concentrations, which corresponds with decreasing land use intensities. |
| first_indexed | 2024-12-19T23:27:28Z |
| format | Article |
| id | doaj.art-cbb08a5783964e3384aaededc602478a |
| institution | Directory Open Access Journal |
| issn | 1807-8621 |
| language | English |
| last_indexed | 2024-12-19T23:27:28Z |
| publishDate | 2018-08-01 |
| publisher | Eduem (Editora da Universidade Estadual de Maringá) |
| record_format | Article |
| series | Acta Scientiarum: Agronomy |
| spelling | doaj.art-cbb08a5783964e3384aaededc602478a2022-12-21T20:01:50ZengEduem (Editora da Universidade Estadual de Maringá)Acta Scientiarum: Agronomy1807-86212018-08-01401e39451e3945110.4025/actasciagron.v40i1.3945118595<b>Comparison of methods to quantify soil microbial biomass carbonRafael Thomaz de Aquino Moura0Marlon da Silva Carrido1Carla da Silva Sousa2Rômulo Simões Cezar Menezes3Everardo Valadares de Sá Barretto Sampaio4Secretaria de Educação da Cidade do RecifeUniversidade Federal do Vale do São FranciscoInstituto Federal de Educação, Ciência e Tecnologia BaianoUniversidade Federal de PernambucoUniversidade Federal de PernambucoSoil microorganism biomass is an important soil quality indicator. The microbial biomass of soil was determined by killing and lysing the soil microbes by fumigation with chloroform, irradiation with gamma rays, or irradiation with microwaves. Four soils with increasing carbon concentrations (5, 10, 15, and 30 g kg-1) were analyzed using four methods: the direct application of chloroform, chloroform fumigation, microwave irradiation, and gamma ray irradiation with radiation doses of 15, 25, 35, 45, and 60 KGy. The fungi and bacteria in the soil were quantified by plate counting. Microwave irradiation and gamma irradiation with doses equal to or above 25 KGy killed all the soil microorganisms, but the chloroform methods did not. The carbon liberation increased with higher gamma doses, while the microbe mortality rates were the same, indicating that carbon was liberated from organic matter sources other than microorganisms. The biomasses determined by the microwave method correlated with those determined by the fumigation and 25 KGy gamma irradiation methods, but their values differed among all methods for at least one soil type. Despite this discrepancy, all methods were consistent in ranking microbial biomasses in increasing order of soil carbon concentrations, which corresponds with decreasing land use intensities.http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39451microwavegamma irradiationfumigationincubationmicrobial carbon. |
| spellingShingle | Rafael Thomaz de Aquino Moura Marlon da Silva Carrido Carla da Silva Sousa Rômulo Simões Cezar Menezes Everardo Valadares de Sá Barretto Sampaio <b>Comparison of methods to quantify soil microbial biomass carbon Acta Scientiarum: Agronomy microwave gamma irradiation fumigation incubation microbial carbon. |
| title | <b>Comparison of methods to quantify soil microbial biomass carbon |
| title_full | <b>Comparison of methods to quantify soil microbial biomass carbon |
| title_fullStr | <b>Comparison of methods to quantify soil microbial biomass carbon |
| title_full_unstemmed | <b>Comparison of methods to quantify soil microbial biomass carbon |
| title_short | <b>Comparison of methods to quantify soil microbial biomass carbon |
| title_sort | b comparison of methods to quantify soil microbial biomass carbon |
| topic | microwave gamma irradiation fumigation incubation microbial carbon. |
| url | http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/39451 |
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