Data/hora: 23/06/2024 04:28:00

Biblioteca(s): 	Embrapa Meio-Norte.	
Data corrente: 	02/07/2020	
Data da última atualização: 	10/12/2020	
Autoria: 	RITTL, T. F.; CANISARES, L.; SAGRILO, E.; BAHL, K. B.; DANNENMANN, M.; CERRI, C. E. P.	
Afiliação: 	Tatiana F. Rittl, USP-ESALQ, Piracicaba, SP.; Luiza Canisares, USP-ESALQ, Piracicaba, SP.; EDVALDO SAGRILO, CPAMN; Klaus Butterbach Bahl, Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Garmisch-Parten-kirchen 82467 (Germany); Michael Dannenmann, Karlsruhe Institute of Technology, Institute of Meteorology and Climate Research, Atmospheric Environmental Research (IMK-IFU), Garmisch-Parten-kirchen 82467 (Germany); Carlos E. P. Cerri, USP-ESALQ, Piracicaba, SP.	
Título: 	Temperature sensitivity of soil organic matter decomposition varies with biocharapplication and soil type.	
Ano de publicação: 	2020	
Fonte/Imprenta: 	Pedosphere, v. 30, n. 3, p. 336-342, 2020.	
ISSN: 	1002-0160	
DOI: 	10.1016/S1002-0160(20)60013-3	
Idioma: 	Inglês	
Conteúdo: 	Biochar application has the potential to improve soil fertility and increase soil carbon stock, especially in tropical regions. Information on the temperaturesensitivity of carbon dioxide (CO2) evolution from biochar-amended soils at very high temperatures, as observed for tropical surface soils, is limited buturgently needed for the development of region-specific biochar management targeted to optimize biochar effects on soil functions. Here, we investigated thetemperature sensitivity of soil respiration to the addition of different rates ofMiscanthusbiochar (0, 6.25, 12.5, and 25 Mg ha&#8722;1) in two types of soils withcontrasting textures. Biochar-amended soil treatments and their controls were incubated at constant temperatures of 20, 30, and 40&#9702;C. Overall, our resultsshow that: i) considering data from all treatments and temperatures, the addition of biochar decreased soil CO2emissions when compared to untreated soils;ii) CO2emissions from biochar-amended soils had a higher temperature sensitivity than those from biochar-free soils; iii) the temperature sensitivity of soilrespiration in sandy soils was higher than that in clay soils; and iv) for clay soils, relative increases in soil CO2emissions from biochar-amended soils werehigher when the temperature increased from 30 to 40&#9702;C, while for sandy soils, the highest temperature responses of soil respiration were observed whenincreasing the temperature from 20 to 30&#9702;C. Together, these findings suggest a significantly reduced potential to increase soil organic carbon stocks whenMiscanthusbiochar is applied to tropical soils at high surface temperatures, which could be counteracted by the soil- and weather-specific timing of biocharapplication.	
Thesagro: 	Dióxido de Carbono; Efeito Estufa; Solo Arenoso; Solo Argiloso; Solo Tropical.	
Thesaurus Nal: 	Carbon dioxide; Clay soils; Greenhouse gas emissions; Miscanthus; Sandy soils; Tropical soils.	
Categoria do assunto: 	X Pesquisa, Tecnologia e Engenharia	
Registro original: 	Embrapa Meio-Norte (CPAMN)	
Exemplares: 	CPAMN - (32988-1) - UPC - AP - DD -  -  -  - DIS